Bjorn Helgaas | 7328c8f | 2018-01-26 11:45:16 -0600 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Bjorn Helgaas | df62ab5 | 2018-03-09 16:36:33 -0600 | [diff] [blame] | 3 | * Support routines for initializing a PCI subsystem |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * Extruded from code written by |
| 6 | * Dave Rusling (david.rusling@reo.mts.dec.com) |
| 7 | * David Mosberger (davidm@cs.arizona.edu) |
| 8 | * David Miller (davem@redhat.com) |
| 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * Nov 2000, Ivan Kokshaysky <ink@jurassic.park.msu.ru> |
| 11 | * PCI-PCI bridges cleanup, sorted resource allocation. |
| 12 | * Feb 2002, Ivan Kokshaysky <ink@jurassic.park.msu.ru> |
| 13 | * Converted to allocation in 3 passes, which gives |
| 14 | * tighter packing. Prefetchable range support. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/pci.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/ioport.h> |
| 23 | #include <linux/cache.h> |
| 24 | #include <linux/slab.h> |
Rui Wang | 584c5c4 | 2016-08-17 16:00:34 +0800 | [diff] [blame] | 25 | #include <linux/acpi.h> |
Chris Wright | 6faf17f | 2009-08-28 13:00:06 -0700 | [diff] [blame] | 26 | #include "pci.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
Bjorn Helgaas | 844393f | 2012-02-23 20:18:59 -0700 | [diff] [blame] | 28 | unsigned int pci_flags; |
Bjorn Helgaas | 4708770 | 2012-02-23 14:29:23 -0700 | [diff] [blame] | 29 | |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 30 | struct pci_dev_resource { |
| 31 | struct list_head list; |
Yinghai Lu | 2934a0d | 2012-01-21 02:08:26 -0800 | [diff] [blame] | 32 | struct resource *res; |
| 33 | struct pci_dev *dev; |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 34 | resource_size_t start; |
| 35 | resource_size_t end; |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 36 | resource_size_t add_size; |
Ram Pai | 2bbc694 | 2011-07-25 13:08:39 -0700 | [diff] [blame] | 37 | resource_size_t min_align; |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 38 | unsigned long flags; |
| 39 | }; |
| 40 | |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 41 | static void free_list(struct list_head *head) |
| 42 | { |
| 43 | struct pci_dev_resource *dev_res, *tmp; |
| 44 | |
| 45 | list_for_each_entry_safe(dev_res, tmp, head, list) { |
| 46 | list_del(&dev_res->list); |
| 47 | kfree(dev_res); |
| 48 | } |
| 49 | } |
Ram Pai | 094732a | 2011-02-14 17:43:18 -0800 | [diff] [blame] | 50 | |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 51 | /** |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 52 | * add_to_list() - Add a new resource tracker to the list |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 53 | * @head: Head of the list |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 54 | * @dev: Device to which the resource belongs |
| 55 | * @res: Resource to be tracked |
| 56 | * @add_size: Additional size to be optionally added to the resource |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 57 | */ |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 58 | static int add_to_list(struct list_head *head, struct pci_dev *dev, |
| 59 | struct resource *res, resource_size_t add_size, |
| 60 | resource_size_t min_align) |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 61 | { |
Yinghai Lu | 764242a | 2012-01-21 02:08:28 -0800 | [diff] [blame] | 62 | struct pci_dev_resource *tmp; |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 63 | |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 64 | tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); |
Markus Elfring | c7abb23 | 2017-12-29 12:15:16 +0100 | [diff] [blame] | 65 | if (!tmp) |
Yinghai Lu | ef62dfe | 2012-01-21 02:08:18 -0800 | [diff] [blame] | 66 | return -ENOMEM; |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 67 | |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 68 | tmp->res = res; |
| 69 | tmp->dev = dev; |
| 70 | tmp->start = res->start; |
| 71 | tmp->end = res->end; |
| 72 | tmp->flags = res->flags; |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 73 | tmp->add_size = add_size; |
Ram Pai | 2bbc694 | 2011-07-25 13:08:39 -0700 | [diff] [blame] | 74 | tmp->min_align = min_align; |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 75 | |
| 76 | list_add(&tmp->list, head); |
Yinghai Lu | ef62dfe | 2012-01-21 02:08:18 -0800 | [diff] [blame] | 77 | |
| 78 | return 0; |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 79 | } |
| 80 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 81 | static void remove_from_list(struct list_head *head, struct resource *res) |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 82 | { |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 83 | struct pci_dev_resource *dev_res, *tmp; |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 84 | |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 85 | list_for_each_entry_safe(dev_res, tmp, head, list) { |
| 86 | if (dev_res->res == res) { |
| 87 | list_del(&dev_res->list); |
| 88 | kfree(dev_res); |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 89 | break; |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 90 | } |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 91 | } |
| 92 | } |
| 93 | |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 94 | static struct pci_dev_resource *res_to_dev_res(struct list_head *head, |
| 95 | struct resource *res) |
Yinghai Lu | 1c37235 | 2012-01-21 02:08:19 -0800 | [diff] [blame] | 96 | { |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 97 | struct pci_dev_resource *dev_res; |
Yinghai Lu | 1c37235 | 2012-01-21 02:08:19 -0800 | [diff] [blame] | 98 | |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 99 | list_for_each_entry(dev_res, head, list) { |
Bjorn Helgaas | 25e7738 | 2016-12-29 11:27:52 -0600 | [diff] [blame] | 100 | if (dev_res->res == res) |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 101 | return dev_res; |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 102 | } |
Yinghai Lu | 1c37235 | 2012-01-21 02:08:19 -0800 | [diff] [blame] | 103 | |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 104 | return NULL; |
Yinghai Lu | 1c37235 | 2012-01-21 02:08:19 -0800 | [diff] [blame] | 105 | } |
| 106 | |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 107 | static resource_size_t get_res_add_size(struct list_head *head, |
| 108 | struct resource *res) |
| 109 | { |
| 110 | struct pci_dev_resource *dev_res; |
| 111 | |
| 112 | dev_res = res_to_dev_res(head, res); |
| 113 | return dev_res ? dev_res->add_size : 0; |
| 114 | } |
| 115 | |
| 116 | static resource_size_t get_res_add_align(struct list_head *head, |
| 117 | struct resource *res) |
| 118 | { |
| 119 | struct pci_dev_resource *dev_res; |
| 120 | |
| 121 | dev_res = res_to_dev_res(head, res); |
| 122 | return dev_res ? dev_res->min_align : 0; |
| 123 | } |
| 124 | |
| 125 | |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 126 | /* Sort resources by alignment */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 127 | static void pdev_sort_resources(struct pci_dev *dev, struct list_head *head) |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 128 | { |
| 129 | int i; |
| 130 | |
| 131 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { |
| 132 | struct resource *r; |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 133 | struct pci_dev_resource *dev_res, *tmp; |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 134 | resource_size_t r_align; |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 135 | struct list_head *n; |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 136 | |
| 137 | r = &dev->resource[i]; |
| 138 | |
| 139 | if (r->flags & IORESOURCE_PCI_FIXED) |
| 140 | continue; |
| 141 | |
| 142 | if (!(r->flags) || r->parent) |
| 143 | continue; |
| 144 | |
| 145 | r_align = pci_resource_alignment(dev, r); |
| 146 | if (!r_align) { |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 147 | pci_warn(dev, "BAR %d: %pR has bogus alignment\n", |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 148 | i, r); |
| 149 | continue; |
| 150 | } |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 151 | |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 152 | tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); |
| 153 | if (!tmp) |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 154 | panic("pdev_sort_resources(): kmalloc() failed!\n"); |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 155 | tmp->res = r; |
| 156 | tmp->dev = dev; |
| 157 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 158 | /* Fallback is smallest one or list is empty */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 159 | n = head; |
| 160 | list_for_each_entry(dev_res, head, list) { |
| 161 | resource_size_t align; |
| 162 | |
| 163 | align = pci_resource_alignment(dev_res->dev, |
| 164 | dev_res->res); |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 165 | |
| 166 | if (r_align > align) { |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 167 | n = &dev_res->list; |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 168 | break; |
| 169 | } |
| 170 | } |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 171 | /* Insert it just before n */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 172 | list_add_tail(&tmp->list, n); |
Yinghai Lu | 78c3b32 | 2012-01-21 02:08:25 -0800 | [diff] [blame] | 173 | } |
| 174 | } |
| 175 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 176 | static void __dev_sort_resources(struct pci_dev *dev, struct list_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | { |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 178 | u16 class = dev->class >> 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 180 | /* Don't touch classless devices or host bridges or IOAPICs */ |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 181 | if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST) |
| 182 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 184 | /* Don't touch IOAPIC devices already enabled by firmware */ |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 185 | if (class == PCI_CLASS_SYSTEM_PIC) { |
| 186 | u16 command; |
| 187 | pci_read_config_word(dev, PCI_COMMAND, &command); |
| 188 | if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) |
| 189 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 192 | pdev_sort_resources(dev, head); |
| 193 | } |
| 194 | |
Ram Pai | fc075e1 | 2011-02-14 17:43:19 -0800 | [diff] [blame] | 195 | static inline void reset_resource(struct resource *res) |
| 196 | { |
| 197 | res->start = 0; |
| 198 | res->end = 0; |
| 199 | res->flags = 0; |
| 200 | } |
| 201 | |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 202 | /** |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 203 | * reassign_resources_sorted() - Satisfy any additional resource requests |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 204 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 205 | * @realloc_head: Head of the list tracking requests requiring |
| 206 | * additional resources |
| 207 | * @head: Head of the list tracking requests with allocated |
| 208 | * resources |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 209 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 210 | * Walk through each element of the realloc_head and try to procure additional |
| 211 | * resources for the element, provided the element is in the head list. |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 212 | */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 213 | static void reassign_resources_sorted(struct list_head *realloc_head, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 214 | struct list_head *head) |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 215 | { |
| 216 | struct resource *res; |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 217 | struct pci_dev_resource *add_res, *tmp; |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 218 | struct pci_dev_resource *dev_res; |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 219 | resource_size_t add_size, align; |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 220 | int idx; |
| 221 | |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 222 | list_for_each_entry_safe(add_res, tmp, realloc_head, list) { |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 223 | bool found_match = false; |
| 224 | |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 225 | res = add_res->res; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 226 | /* Skip resource that has been reset */ |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 227 | if (!res->flags) |
| 228 | goto out; |
| 229 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 230 | /* Skip this resource if not found in head list */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 231 | list_for_each_entry(dev_res, head, list) { |
| 232 | if (dev_res->res == res) { |
| 233 | found_match = true; |
| 234 | break; |
| 235 | } |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 236 | } |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 237 | if (!found_match) /* Just skip */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 238 | continue; |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 239 | |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 240 | idx = res - &add_res->dev->resource[0]; |
| 241 | add_size = add_res->add_size; |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 242 | align = add_res->min_align; |
Ram Pai | 2bbc694 | 2011-07-25 13:08:39 -0700 | [diff] [blame] | 243 | if (!resource_size(res)) { |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 244 | res->start = align; |
Ram Pai | 2bbc694 | 2011-07-25 13:08:39 -0700 | [diff] [blame] | 245 | res->end = res->start + add_size - 1; |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 246 | if (pci_assign_resource(add_res->dev, idx)) |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 247 | reset_resource(res); |
Ram Pai | 2bbc694 | 2011-07-25 13:08:39 -0700 | [diff] [blame] | 248 | } else { |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 249 | res->flags |= add_res->flags & |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 250 | (IORESOURCE_STARTALIGN|IORESOURCE_SIZEALIGN); |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 251 | if (pci_reassign_resource(add_res->dev, idx, |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 252 | add_size, align)) |
Mohan Kumar | 34c6b71 | 2019-04-20 07:07:20 +0300 | [diff] [blame] | 253 | pci_info(add_res->dev, "failed to add %llx res[%d]=%pR\n", |
| 254 | (unsigned long long) add_size, idx, |
| 255 | res); |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 256 | } |
| 257 | out: |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 258 | list_del(&add_res->list); |
| 259 | kfree(add_res); |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 260 | } |
| 261 | } |
| 262 | |
| 263 | /** |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 264 | * assign_requested_resources_sorted() - Satisfy resource requests |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 265 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 266 | * @head: Head of the list tracking requests for resources |
| 267 | * @fail_head: Head of the list tracking requests that could not be |
| 268 | * allocated |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 269 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 270 | * Satisfy resource requests of each element in the list. Add requests that |
| 271 | * could not be satisfied to the failed_list. |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 272 | */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 273 | static void assign_requested_resources_sorted(struct list_head *head, |
| 274 | struct list_head *fail_head) |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 275 | { |
| 276 | struct resource *res; |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 277 | struct pci_dev_resource *dev_res; |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 278 | int idx; |
| 279 | |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 280 | list_for_each_entry(dev_res, head, list) { |
| 281 | res = dev_res->res; |
| 282 | idx = res - &dev_res->dev->resource[0]; |
| 283 | if (resource_size(res) && |
| 284 | pci_assign_resource(dev_res->dev, idx)) { |
Yinghai Lu | a3cb999 | 2013-01-21 13:20:43 -0800 | [diff] [blame] | 285 | if (fail_head) { |
Yinghai Lu | 9a92866 | 2010-02-28 15:49:39 -0800 | [diff] [blame] | 286 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 287 | * If the failed resource is a ROM BAR and |
| 288 | * it will be enabled later, don't add it |
| 289 | * to the list. |
Yinghai Lu | 9a92866 | 2010-02-28 15:49:39 -0800 | [diff] [blame] | 290 | */ |
| 291 | if (!((idx == PCI_ROM_RESOURCE) && |
| 292 | (!(res->flags & IORESOURCE_ROM_ENABLE)))) |
Yinghai Lu | 67cc7e2 | 2012-01-21 02:08:32 -0800 | [diff] [blame] | 293 | add_to_list(fail_head, |
| 294 | dev_res->dev, res, |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 295 | 0 /* don't care */, |
| 296 | 0 /* don't care */); |
Yinghai Lu | 9a92866 | 2010-02-28 15:49:39 -0800 | [diff] [blame] | 297 | } |
Ram Pai | fc075e1 | 2011-02-14 17:43:19 -0800 | [diff] [blame] | 298 | reset_resource(res); |
Rajesh Shah | 542df5d | 2005-04-28 00:25:50 -0700 | [diff] [blame] | 299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } |
| 301 | } |
| 302 | |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 303 | static unsigned long pci_fail_res_type_mask(struct list_head *fail_head) |
| 304 | { |
| 305 | struct pci_dev_resource *fail_res; |
| 306 | unsigned long mask = 0; |
| 307 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 308 | /* Check failed type */ |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 309 | list_for_each_entry(fail_res, fail_head, list) |
| 310 | mask |= fail_res->flags; |
| 311 | |
| 312 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 313 | * One pref failed resource will set IORESOURCE_MEM, as we can |
| 314 | * allocate pref in non-pref range. Will release all assigned |
| 315 | * non-pref sibling resources according to that bit. |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 316 | */ |
| 317 | return mask & (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH); |
| 318 | } |
| 319 | |
| 320 | static bool pci_need_to_release(unsigned long mask, struct resource *res) |
| 321 | { |
| 322 | if (res->flags & IORESOURCE_IO) |
| 323 | return !!(mask & IORESOURCE_IO); |
| 324 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 325 | /* Check pref at first */ |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 326 | if (res->flags & IORESOURCE_PREFETCH) { |
| 327 | if (mask & IORESOURCE_PREFETCH) |
| 328 | return true; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 329 | /* Count pref if its parent is non-pref */ |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 330 | else if ((mask & IORESOURCE_MEM) && |
| 331 | !(res->parent->flags & IORESOURCE_PREFETCH)) |
| 332 | return true; |
| 333 | else |
| 334 | return false; |
| 335 | } |
| 336 | |
| 337 | if (res->flags & IORESOURCE_MEM) |
| 338 | return !!(mask & IORESOURCE_MEM); |
| 339 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 340 | return false; /* Should not get here */ |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 341 | } |
| 342 | |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 343 | static void __assign_resources_sorted(struct list_head *head, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 344 | struct list_head *realloc_head, |
| 345 | struct list_head *fail_head) |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 346 | { |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 347 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 348 | * Should not assign requested resources at first. They could be |
| 349 | * adjacent, so later reassign can not reallocate them one by one in |
| 350 | * parent resource window. |
| 351 | * |
| 352 | * Try to assign requested + add_size at beginning. If could do that, |
| 353 | * could get out early. If could not do that, we still try to assign |
| 354 | * requested at first, then try to reassign add_size for some resources. |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 355 | * |
| 356 | * Separate three resource type checking if we need to release |
| 357 | * assigned resource after requested + add_size try. |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 358 | * |
| 359 | * 1. If IO port assignment fails, will release assigned IO |
| 360 | * port. |
| 361 | * 2. If pref MMIO assignment fails, release assigned pref |
| 362 | * MMIO. If assigned pref MMIO's parent is non-pref MMIO |
| 363 | * and non-pref MMIO assignment fails, will release that |
| 364 | * assigned pref MMIO. |
| 365 | * 3. If non-pref MMIO assignment fails or pref MMIO |
| 366 | * assignment fails, will release assigned non-pref MMIO. |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 367 | */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 368 | LIST_HEAD(save_head); |
| 369 | LIST_HEAD(local_fail_head); |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 370 | struct pci_dev_resource *save_res; |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 371 | struct pci_dev_resource *dev_res, *tmp_res, *dev_res2; |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 372 | unsigned long fail_type; |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 373 | resource_size_t add_align, align; |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 374 | |
| 375 | /* Check if optional add_size is there */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 376 | if (!realloc_head || list_empty(realloc_head)) |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 377 | goto requested_and_reassign; |
| 378 | |
| 379 | /* Save original start, end, flags etc at first */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 380 | list_for_each_entry(dev_res, head, list) { |
| 381 | if (add_to_list(&save_head, dev_res->dev, dev_res->res, 0, 0)) { |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 382 | free_list(&save_head); |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 383 | goto requested_and_reassign; |
| 384 | } |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 385 | } |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 386 | |
| 387 | /* Update res in head list with add_size in realloc_head list */ |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 388 | list_for_each_entry_safe(dev_res, tmp_res, head, list) { |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 389 | dev_res->res->end += get_res_add_size(realloc_head, |
| 390 | dev_res->res); |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 391 | |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 392 | /* |
| 393 | * There are two kinds of additional resources in the list: |
| 394 | * 1. bridge resource -- IORESOURCE_STARTALIGN |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 395 | * 2. SR-IOV resource -- IORESOURCE_SIZEALIGN |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 396 | * Here just fix the additional alignment for bridge |
| 397 | */ |
| 398 | if (!(dev_res->res->flags & IORESOURCE_STARTALIGN)) |
| 399 | continue; |
| 400 | |
| 401 | add_align = get_res_add_align(realloc_head, dev_res->res); |
| 402 | |
| 403 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 404 | * The "head" list is sorted by alignment so resources with |
| 405 | * bigger alignment will be assigned first. After we |
| 406 | * change the alignment of a dev_res in "head" list, we |
| 407 | * need to reorder the list by alignment to make it |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 408 | * consistent. |
| 409 | */ |
| 410 | if (add_align > dev_res->res->start) { |
Yinghai Lu | 552bc94 | 2015-05-28 22:40:00 -0700 | [diff] [blame] | 411 | resource_size_t r_size = resource_size(dev_res->res); |
| 412 | |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 413 | dev_res->res->start = add_align; |
Yinghai Lu | 552bc94 | 2015-05-28 22:40:00 -0700 | [diff] [blame] | 414 | dev_res->res->end = add_align + r_size - 1; |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 415 | |
| 416 | list_for_each_entry(dev_res2, head, list) { |
| 417 | align = pci_resource_alignment(dev_res2->dev, |
| 418 | dev_res2->res); |
Wei Yang | a6b6598 | 2015-05-19 14:24:17 +0800 | [diff] [blame] | 419 | if (add_align > align) { |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 420 | list_move_tail(&dev_res->list, |
| 421 | &dev_res2->list); |
Wei Yang | a6b6598 | 2015-05-19 14:24:17 +0800 | [diff] [blame] | 422 | break; |
| 423 | } |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 424 | } |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 425 | } |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 426 | |
| 427 | } |
| 428 | |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 429 | /* Try updated head list with add_size added */ |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 430 | assign_requested_resources_sorted(head, &local_fail_head); |
| 431 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 432 | /* All assigned with add_size? */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 433 | if (list_empty(&local_fail_head)) { |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 434 | /* Remove head list from realloc_head list */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 435 | list_for_each_entry(dev_res, head, list) |
| 436 | remove_from_list(realloc_head, dev_res->res); |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 437 | free_list(&save_head); |
| 438 | free_list(head); |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 439 | return; |
| 440 | } |
| 441 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 442 | /* Check failed type */ |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 443 | fail_type = pci_fail_res_type_mask(&local_fail_head); |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 444 | /* Remove not need to be released assigned res from head list etc */ |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 445 | list_for_each_entry_safe(dev_res, tmp_res, head, list) |
| 446 | if (dev_res->res->parent && |
| 447 | !pci_need_to_release(fail_type, dev_res->res)) { |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 448 | /* Remove it from realloc_head list */ |
Yinghai Lu | aa914f5 | 2013-07-25 06:31:38 -0700 | [diff] [blame] | 449 | remove_from_list(realloc_head, dev_res->res); |
| 450 | remove_from_list(&save_head, dev_res->res); |
| 451 | list_del(&dev_res->list); |
| 452 | kfree(dev_res); |
| 453 | } |
| 454 | |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 455 | free_list(&local_fail_head); |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 456 | /* Release assigned resource */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 457 | list_for_each_entry(dev_res, head, list) |
| 458 | if (dev_res->res->parent) |
| 459 | release_resource(dev_res->res); |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 460 | /* Restore start/end/flags from saved list */ |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 461 | list_for_each_entry(save_res, &save_head, list) { |
| 462 | struct resource *res = save_res->res; |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 463 | |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 464 | res->start = save_res->start; |
| 465 | res->end = save_res->end; |
| 466 | res->flags = save_res->flags; |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 467 | } |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 468 | free_list(&save_head); |
Yinghai Lu | 3e6e0d8 | 2012-01-21 02:08:20 -0800 | [diff] [blame] | 469 | |
| 470 | requested_and_reassign: |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 471 | /* Satisfy the must-have resource requests */ |
| 472 | assign_requested_resources_sorted(head, fail_head); |
| 473 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 474 | /* Try to satisfy any additional optional resource requests */ |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 475 | if (realloc_head) |
| 476 | reassign_resources_sorted(realloc_head, head); |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 477 | free_list(head); |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 478 | } |
| 479 | |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 480 | static void pdev_assign_resources_sorted(struct pci_dev *dev, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 481 | struct list_head *add_head, |
| 482 | struct list_head *fail_head) |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 483 | { |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 484 | LIST_HEAD(head); |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 485 | |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 486 | __dev_sort_resources(dev, &head); |
Yinghai Lu | 8424d75 | 2012-01-21 02:08:21 -0800 | [diff] [blame] | 487 | __assign_resources_sorted(&head, add_head, fail_head); |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 488 | |
| 489 | } |
| 490 | |
| 491 | static void pbus_assign_resources_sorted(const struct pci_bus *bus, |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 492 | struct list_head *realloc_head, |
| 493 | struct list_head *fail_head) |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 494 | { |
| 495 | struct pci_dev *dev; |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 496 | LIST_HEAD(head); |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 497 | |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 498 | list_for_each_entry(dev, &bus->devices, bus_list) |
| 499 | __dev_sort_resources(dev, &head); |
| 500 | |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 501 | __assign_resources_sorted(&head, realloc_head, fail_head); |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 502 | } |
| 503 | |
Dominik Brodowski | b3743fa | 2005-09-09 13:03:23 -0700 | [diff] [blame] | 504 | void pci_setup_cardbus(struct pci_bus *bus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
| 506 | struct pci_dev *bridge = bus->self; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 507 | struct resource *res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | struct pci_bus_region region; |
| 509 | |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 510 | pci_info(bridge, "CardBus bridge to %pR\n", |
Yinghai Lu | b918c62 | 2012-05-17 18:51:11 -0700 | [diff] [blame] | 511 | &bus->busn_res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 513 | res = bus->resource[0]; |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 514 | pcibios_resource_to_bus(bridge->bus, ®ion, res); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 515 | if (res->flags & IORESOURCE_IO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | /* |
| 517 | * The IO resource is allocated a range twice as large as it |
| 518 | * would normally need. This allows us to set both IO regs. |
| 519 | */ |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 520 | pci_info(bridge, " bridge window %pR\n", res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | pci_write_config_dword(bridge, PCI_CB_IO_BASE_0, |
| 522 | region.start); |
| 523 | pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_0, |
| 524 | region.end); |
| 525 | } |
| 526 | |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 527 | res = bus->resource[1]; |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 528 | pcibios_resource_to_bus(bridge->bus, ®ion, res); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 529 | if (res->flags & IORESOURCE_IO) { |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 530 | pci_info(bridge, " bridge window %pR\n", res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | pci_write_config_dword(bridge, PCI_CB_IO_BASE_1, |
| 532 | region.start); |
| 533 | pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_1, |
| 534 | region.end); |
| 535 | } |
| 536 | |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 537 | res = bus->resource[2]; |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 538 | pcibios_resource_to_bus(bridge->bus, ®ion, res); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 539 | if (res->flags & IORESOURCE_MEM) { |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 540 | pci_info(bridge, " bridge window %pR\n", res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0, |
| 542 | region.start); |
| 543 | pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_0, |
| 544 | region.end); |
| 545 | } |
| 546 | |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 547 | res = bus->resource[3]; |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 548 | pcibios_resource_to_bus(bridge->bus, ®ion, res); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 549 | if (res->flags & IORESOURCE_MEM) { |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 550 | pci_info(bridge, " bridge window %pR\n", res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1, |
| 552 | region.start); |
| 553 | pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_1, |
| 554 | region.end); |
| 555 | } |
| 556 | } |
Dominik Brodowski | b3743fa | 2005-09-09 13:03:23 -0700 | [diff] [blame] | 557 | EXPORT_SYMBOL(pci_setup_cardbus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 559 | /* |
| 560 | * Initialize bridges with base/limit values we have collected. PCI-to-PCI |
| 561 | * Bridge Architecture Specification rev. 1.1 (1998) requires that if there |
| 562 | * are no I/O ports or memory behind the bridge, the corresponding range |
| 563 | * must be turned off by writing base value greater than limit to the |
| 564 | * bridge's base/limit registers. |
| 565 | * |
| 566 | * Note: care must be taken when updating I/O base/limit registers of |
| 567 | * bridges which support 32-bit I/O. This update requires two config space |
| 568 | * writes, so it's quite possible that an I/O window of the bridge will |
| 569 | * have some undesirable address (e.g. 0) after the first write. Ditto |
| 570 | * 64-bit prefetchable MMIO. |
| 571 | */ |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 572 | static void pci_setup_bridge_io(struct pci_dev *bridge) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 574 | struct resource *res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | struct pci_bus_region region; |
Bjorn Helgaas | 2b28ae1 | 2012-07-09 13:38:57 -0600 | [diff] [blame] | 576 | unsigned long io_mask; |
| 577 | u8 io_base_lo, io_limit_lo; |
Bjorn Helgaas | 5b764b8 | 2013-11-27 17:24:50 -0700 | [diff] [blame] | 578 | u16 l; |
| 579 | u32 io_upper16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
Bjorn Helgaas | 2b28ae1 | 2012-07-09 13:38:57 -0600 | [diff] [blame] | 581 | io_mask = PCI_IO_RANGE_MASK; |
| 582 | if (bridge->io_window_1k) |
| 583 | io_mask = PCI_IO_1K_RANGE_MASK; |
| 584 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 585 | /* Set up the top and bottom of the PCI I/O segment for this bus */ |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 586 | res = &bridge->resource[PCI_BRIDGE_RESOURCES + 0]; |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 587 | pcibios_resource_to_bus(bridge->bus, ®ion, res); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 588 | if (res->flags & IORESOURCE_IO) { |
Bjorn Helgaas | 5b764b8 | 2013-11-27 17:24:50 -0700 | [diff] [blame] | 589 | pci_read_config_word(bridge, PCI_IO_BASE, &l); |
Bjorn Helgaas | 2b28ae1 | 2012-07-09 13:38:57 -0600 | [diff] [blame] | 590 | io_base_lo = (region.start >> 8) & io_mask; |
| 591 | io_limit_lo = (region.end >> 8) & io_mask; |
Bjorn Helgaas | 5b764b8 | 2013-11-27 17:24:50 -0700 | [diff] [blame] | 592 | l = ((u16) io_limit_lo << 8) | io_base_lo; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 593 | /* Set up upper 16 bits of I/O base/limit */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | io_upper16 = (region.end & 0xffff0000) | (region.start >> 16); |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 595 | pci_info(bridge, " bridge window %pR\n", res); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 596 | } else { |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 597 | /* Clear upper 16 bits of I/O base/limit */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | io_upper16 = 0; |
| 599 | l = 0x00f0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | } |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 601 | /* Temporarily disable the I/O range before updating PCI_IO_BASE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, 0x0000ffff); |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 603 | /* Update lower 16 bits of I/O base/limit */ |
Bjorn Helgaas | 5b764b8 | 2013-11-27 17:24:50 -0700 | [diff] [blame] | 604 | pci_write_config_word(bridge, PCI_IO_BASE, l); |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 605 | /* Update upper 16 bits of I/O base/limit */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, io_upper16); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 607 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 609 | static void pci_setup_bridge_mmio(struct pci_dev *bridge) |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 610 | { |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 611 | struct resource *res; |
| 612 | struct pci_bus_region region; |
| 613 | u32 l; |
| 614 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 615 | /* Set up the top and bottom of the PCI Memory segment for this bus */ |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 616 | res = &bridge->resource[PCI_BRIDGE_RESOURCES + 1]; |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 617 | pcibios_resource_to_bus(bridge->bus, ®ion, res); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 618 | if (res->flags & IORESOURCE_MEM) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | l = (region.start >> 16) & 0xfff0; |
| 620 | l |= region.end & 0xfff00000; |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 621 | pci_info(bridge, " bridge window %pR\n", res); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 622 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | l = 0x0000fff0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | } |
| 625 | pci_write_config_dword(bridge, PCI_MEMORY_BASE, l); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 626 | } |
| 627 | |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 628 | static void pci_setup_bridge_mmio_pref(struct pci_dev *bridge) |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 629 | { |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 630 | struct resource *res; |
| 631 | struct pci_bus_region region; |
| 632 | u32 l, bu, lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 634 | /* |
| 635 | * Clear out the upper 32 bits of PREF limit. If |
| 636 | * PCI_PREF_BASE_UPPER32 was non-zero, this temporarily disables |
| 637 | * PREF range, which is ok. |
| 638 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, 0); |
| 640 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 641 | /* Set up PREF base/limit */ |
Benjamin Herrenschmidt | c40a22e | 2007-12-10 17:32:15 +1100 | [diff] [blame] | 642 | bu = lu = 0; |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 643 | res = &bridge->resource[PCI_BRIDGE_RESOURCES + 2]; |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 644 | pcibios_resource_to_bus(bridge->bus, ®ion, res); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 645 | if (res->flags & IORESOURCE_PREFETCH) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | l = (region.start >> 16) & 0xfff0; |
| 647 | l |= region.end & 0xfff00000; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 648 | if (res->flags & IORESOURCE_MEM_64) { |
Yinghai Lu | 1f82de1 | 2009-04-23 20:48:32 -0700 | [diff] [blame] | 649 | bu = upper_32_bits(region.start); |
| 650 | lu = upper_32_bits(region.end); |
Yinghai Lu | 1f82de1 | 2009-04-23 20:48:32 -0700 | [diff] [blame] | 651 | } |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 652 | pci_info(bridge, " bridge window %pR\n", res); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 653 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | l = 0x0000fff0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
| 656 | pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, l); |
| 657 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 658 | /* Set the upper 32 bits of PREF base & limit */ |
Alex Williamson | 59353ea | 2009-11-30 14:51:44 -0700 | [diff] [blame] | 659 | pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); |
| 660 | pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | static void __pci_setup_bridge(struct pci_bus *bus, unsigned long type) |
| 664 | { |
| 665 | struct pci_dev *bridge = bus->self; |
| 666 | |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 667 | pci_info(bridge, "PCI bridge to %pR\n", |
Yinghai Lu | b918c62 | 2012-05-17 18:51:11 -0700 | [diff] [blame] | 668 | &bus->busn_res); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 669 | |
| 670 | if (type & IORESOURCE_IO) |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 671 | pci_setup_bridge_io(bridge); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 672 | |
| 673 | if (type & IORESOURCE_MEM) |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 674 | pci_setup_bridge_mmio(bridge); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 675 | |
| 676 | if (type & IORESOURCE_PREFETCH) |
Yinghai Lu | 3f2f4dc | 2015-01-15 10:22:31 -0600 | [diff] [blame] | 677 | pci_setup_bridge_mmio_pref(bridge); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | |
| 679 | pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl); |
| 680 | } |
| 681 | |
Gavin Shan | d366d28 | 2016-05-20 16:41:25 +1000 | [diff] [blame] | 682 | void __weak pcibios_setup_bridge(struct pci_bus *bus, unsigned long type) |
| 683 | { |
| 684 | } |
| 685 | |
Benjamin Herrenschmidt | e244427 | 2011-09-11 14:08:38 -0300 | [diff] [blame] | 686 | void pci_setup_bridge(struct pci_bus *bus) |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 687 | { |
| 688 | unsigned long type = IORESOURCE_IO | IORESOURCE_MEM | |
| 689 | IORESOURCE_PREFETCH; |
| 690 | |
Gavin Shan | d366d28 | 2016-05-20 16:41:25 +1000 | [diff] [blame] | 691 | pcibios_setup_bridge(bus, type); |
Yinghai Lu | 7cc5997 | 2009-12-22 15:02:21 -0800 | [diff] [blame] | 692 | __pci_setup_bridge(bus, type); |
| 693 | } |
| 694 | |
Yinghai Lu | 8505e72 | 2015-01-15 16:21:49 -0600 | [diff] [blame] | 695 | |
| 696 | int pci_claim_bridge_resource(struct pci_dev *bridge, int i) |
| 697 | { |
| 698 | if (i < PCI_BRIDGE_RESOURCES || i > PCI_BRIDGE_RESOURCE_END) |
| 699 | return 0; |
| 700 | |
| 701 | if (pci_claim_resource(bridge, i) == 0) |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 702 | return 0; /* Claimed the window */ |
Yinghai Lu | 8505e72 | 2015-01-15 16:21:49 -0600 | [diff] [blame] | 703 | |
| 704 | if ((bridge->class >> 8) != PCI_CLASS_BRIDGE_PCI) |
| 705 | return 0; |
| 706 | |
| 707 | if (!pci_bus_clip_resource(bridge, i)) |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 708 | return -EINVAL; /* Clipping didn't change anything */ |
Yinghai Lu | 8505e72 | 2015-01-15 16:21:49 -0600 | [diff] [blame] | 709 | |
| 710 | switch (i - PCI_BRIDGE_RESOURCES) { |
| 711 | case 0: |
| 712 | pci_setup_bridge_io(bridge); |
| 713 | break; |
| 714 | case 1: |
| 715 | pci_setup_bridge_mmio(bridge); |
| 716 | break; |
| 717 | case 2: |
| 718 | pci_setup_bridge_mmio_pref(bridge); |
| 719 | break; |
| 720 | default: |
| 721 | return -EINVAL; |
| 722 | } |
| 723 | |
| 724 | if (pci_claim_resource(bridge, i) == 0) |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 725 | return 0; /* Claimed a smaller window */ |
Yinghai Lu | 8505e72 | 2015-01-15 16:21:49 -0600 | [diff] [blame] | 726 | |
| 727 | return -EINVAL; |
| 728 | } |
| 729 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 730 | /* |
| 731 | * Check whether the bridge supports optional I/O and prefetchable memory |
| 732 | * ranges. If not, the respective base/limit registers must be read-only |
| 733 | * and read as 0. |
| 734 | */ |
Sam Ravnborg | 96bde06 | 2007-03-26 21:53:30 -0800 | [diff] [blame] | 735 | static void pci_bridge_check_ranges(struct pci_bus *bus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | struct pci_dev *bridge = bus->self; |
Bjorn Helgaas | 51c48b3 | 2019-01-19 11:35:04 -0600 | [diff] [blame] | 738 | struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | b_res[1].flags |= IORESOURCE_MEM; |
| 741 | |
Bjorn Helgaas | 51c48b3 | 2019-01-19 11:35:04 -0600 | [diff] [blame] | 742 | if (bridge->io_window) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | b_res[0].flags |= IORESOURCE_IO; |
Bjorn Helgaas | d2f54d9 | 2013-11-27 15:31:07 -0700 | [diff] [blame] | 744 | |
Bjorn Helgaas | 51c48b3 | 2019-01-19 11:35:04 -0600 | [diff] [blame] | 745 | if (bridge->pref_window) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH; |
Bjorn Helgaas | 51c48b3 | 2019-01-19 11:35:04 -0600 | [diff] [blame] | 747 | if (bridge->pref_64_window) { |
Yinghai Lu | 1f82de1 | 2009-04-23 20:48:32 -0700 | [diff] [blame] | 748 | b_res[2].flags |= IORESOURCE_MEM_64; |
Yinghai Lu | 9958610 | 2010-01-22 01:02:28 -0800 | [diff] [blame] | 749 | b_res[2].flags |= PCI_PREF_RANGE_TYPE_64; |
| 750 | } |
Yinghai Lu | 1f82de1 | 2009-04-23 20:48:32 -0700 | [diff] [blame] | 751 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | } |
| 753 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 754 | /* |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 755 | * Helper function for sizing routines. Assigned resources have non-NULL |
| 756 | * parent resource. |
| 757 | * |
| 758 | * Return first unassigned resource of the correct type. If there is none, |
| 759 | * return first assigned resource of the correct type. If none of the |
| 760 | * above, return NULL. |
| 761 | * |
| 762 | * Returning an assigned resource of the correct type allows the caller to |
| 763 | * distinguish between already assigned and no resource of the correct type. |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 764 | */ |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 765 | static struct resource *find_bus_resource_of_type(struct pci_bus *bus, |
| 766 | unsigned long type_mask, |
| 767 | unsigned long type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | { |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 769 | struct resource *r, *r_assigned = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | |
Bjorn Helgaas | 89a74ec | 2010-02-23 10:24:31 -0700 | [diff] [blame] | 772 | pci_bus_for_each_resource(bus, r, i) { |
Ivan Kokshaysky | 299de03 | 2005-06-15 18:59:27 +0400 | [diff] [blame] | 773 | if (r == &ioport_resource || r == &iomem_resource) |
| 774 | continue; |
Jesse Barnes | 55a1098 | 2009-10-27 09:39:18 -0700 | [diff] [blame] | 775 | if (r && (r->flags & type_mask) == type && !r->parent) |
| 776 | return r; |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 777 | if (r && (r->flags & type_mask) == type && !r_assigned) |
| 778 | r_assigned = r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 780 | return r_assigned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | } |
| 782 | |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 783 | static resource_size_t calculate_iosize(resource_size_t size, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 784 | resource_size_t min_size, |
| 785 | resource_size_t size1, |
| 786 | resource_size_t add_size, |
| 787 | resource_size_t children_add_size, |
| 788 | resource_size_t old_size, |
| 789 | resource_size_t align) |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 790 | { |
| 791 | if (size < min_size) |
| 792 | size = min_size; |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 793 | if (old_size == 1) |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 794 | old_size = 0; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 795 | /* |
| 796 | * To be fixed in 2.5: we should have sort of HAVE_ISA flag in the |
| 797 | * struct pci_bus. |
| 798 | */ |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 799 | #if defined(CONFIG_ISA) || defined(CONFIG_EISA) |
| 800 | size = (size & 0xff) + ((size & ~0xffUL) << 2); |
| 801 | #endif |
Jon Derrick | de3ffa3 | 2018-09-25 12:39:06 -0600 | [diff] [blame] | 802 | size = size + size1; |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 803 | if (size < old_size) |
| 804 | size = old_size; |
Jon Derrick | de3ffa3 | 2018-09-25 12:39:06 -0600 | [diff] [blame] | 805 | |
| 806 | size = ALIGN(max(size, add_size) + children_add_size, align); |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 807 | return size; |
| 808 | } |
| 809 | |
| 810 | static resource_size_t calculate_memsize(resource_size_t size, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 811 | resource_size_t min_size, |
| 812 | resource_size_t add_size, |
| 813 | resource_size_t children_add_size, |
| 814 | resource_size_t old_size, |
| 815 | resource_size_t align) |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 816 | { |
| 817 | if (size < min_size) |
| 818 | size = min_size; |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 819 | if (old_size == 1) |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 820 | old_size = 0; |
| 821 | if (size < old_size) |
| 822 | size = old_size; |
Jon Derrick | de3ffa3 | 2018-09-25 12:39:06 -0600 | [diff] [blame] | 823 | |
| 824 | size = ALIGN(max(size, add_size) + children_add_size, align); |
Ram Pai | 13583b1 | 2011-02-14 17:43:17 -0800 | [diff] [blame] | 825 | return size; |
| 826 | } |
| 827 | |
Gavin Shan | ac5ad93 | 2012-09-11 16:59:45 -0600 | [diff] [blame] | 828 | resource_size_t __weak pcibios_window_alignment(struct pci_bus *bus, |
| 829 | unsigned long type) |
| 830 | { |
| 831 | return 1; |
| 832 | } |
| 833 | |
| 834 | #define PCI_P2P_DEFAULT_MEM_ALIGN 0x100000 /* 1MiB */ |
| 835 | #define PCI_P2P_DEFAULT_IO_ALIGN 0x1000 /* 4KiB */ |
| 836 | #define PCI_P2P_DEFAULT_IO_ALIGN_1K 0x400 /* 1KiB */ |
| 837 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 838 | static resource_size_t window_alignment(struct pci_bus *bus, unsigned long type) |
Gavin Shan | ac5ad93 | 2012-09-11 16:59:45 -0600 | [diff] [blame] | 839 | { |
| 840 | resource_size_t align = 1, arch_align; |
| 841 | |
| 842 | if (type & IORESOURCE_MEM) |
| 843 | align = PCI_P2P_DEFAULT_MEM_ALIGN; |
| 844 | else if (type & IORESOURCE_IO) { |
| 845 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 846 | * Per spec, I/O windows are 4K-aligned, but some bridges have |
| 847 | * an extension to support 1K alignment. |
Gavin Shan | ac5ad93 | 2012-09-11 16:59:45 -0600 | [diff] [blame] | 848 | */ |
| 849 | if (bus->self->io_window_1k) |
| 850 | align = PCI_P2P_DEFAULT_IO_ALIGN_1K; |
| 851 | else |
| 852 | align = PCI_P2P_DEFAULT_IO_ALIGN; |
| 853 | } |
| 854 | |
| 855 | arch_align = pcibios_window_alignment(bus, type); |
| 856 | return max(align, arch_align); |
| 857 | } |
| 858 | |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 859 | /** |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 860 | * pbus_size_io() - Size the I/O window of a given bus |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 861 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 862 | * @bus: The bus |
| 863 | * @min_size: The minimum I/O window that must be allocated |
| 864 | * @add_size: Additional optional I/O window |
| 865 | * @realloc_head: Track the additional I/O window on this list |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 866 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 867 | * Sizing the I/O windows of the PCI-PCI bridge is trivial, since these |
| 868 | * windows have 1K or 4K granularity and the I/O ranges of non-bridge PCI |
| 869 | * devices are limited to 256 bytes. We must be careful with the ISA |
| 870 | * aliasing though. |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 871 | */ |
| 872 | static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 873 | resource_size_t add_size, |
| 874 | struct list_head *realloc_head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | { |
| 876 | struct pci_dev *dev; |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 877 | struct resource *b_res = find_bus_resource_of_type(bus, IORESOURCE_IO, |
| 878 | IORESOURCE_IO); |
Wei Yang | 11251a8 | 2013-08-02 17:31:05 +0800 | [diff] [blame] | 879 | resource_size_t size = 0, size0 = 0, size1 = 0; |
Yinghai Lu | be76891 | 2011-07-25 13:08:38 -0700 | [diff] [blame] | 880 | resource_size_t children_add_size = 0; |
Bjorn Helgaas | 2d1d667 | 2013-08-05 16:15:10 -0600 | [diff] [blame] | 881 | resource_size_t min_align, align; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | |
| 883 | if (!b_res) |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 884 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 886 | /* If resource is already assigned, nothing more to do */ |
| 887 | if (b_res->parent) |
| 888 | return; |
| 889 | |
Bjorn Helgaas | 2d1d667 | 2013-08-05 16:15:10 -0600 | [diff] [blame] | 890 | min_align = window_alignment(bus, IORESOURCE_IO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | list_for_each_entry(dev, &bus->devices, bus_list) { |
| 892 | int i; |
| 893 | |
| 894 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { |
| 895 | struct resource *r = &dev->resource[i]; |
| 896 | unsigned long r_size; |
| 897 | |
| 898 | if (r->parent || !(r->flags & IORESOURCE_IO)) |
| 899 | continue; |
Zhao, Yu | 022edd8 | 2008-10-13 19:24:28 +0800 | [diff] [blame] | 900 | r_size = resource_size(r); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | |
| 902 | if (r_size < 0x400) |
| 903 | /* Might be re-aligned for ISA */ |
| 904 | size += r_size; |
| 905 | else |
| 906 | size1 += r_size; |
Yinghai Lu | be76891 | 2011-07-25 13:08:38 -0700 | [diff] [blame] | 907 | |
Yinghai Lu | fd59134 | 2012-07-09 19:55:29 -0600 | [diff] [blame] | 908 | align = pci_resource_alignment(dev, r); |
| 909 | if (align > min_align) |
| 910 | min_align = align; |
| 911 | |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 912 | if (realloc_head) |
| 913 | children_add_size += get_res_add_size(realloc_head, r); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | } |
| 915 | } |
Yinghai Lu | fd59134 | 2012-07-09 19:55:29 -0600 | [diff] [blame] | 916 | |
Jon Derrick | de3ffa3 | 2018-09-25 12:39:06 -0600 | [diff] [blame] | 917 | size0 = calculate_iosize(size, min_size, size1, 0, 0, |
Yinghai Lu | fd59134 | 2012-07-09 19:55:29 -0600 | [diff] [blame] | 918 | resource_size(b_res), min_align); |
Jon Derrick | de3ffa3 | 2018-09-25 12:39:06 -0600 | [diff] [blame] | 919 | size1 = (!realloc_head || (realloc_head && !add_size && !children_add_size)) ? size0 : |
| 920 | calculate_iosize(size, min_size, size1, add_size, children_add_size, |
Yinghai Lu | fd59134 | 2012-07-09 19:55:29 -0600 | [diff] [blame] | 921 | resource_size(b_res), min_align); |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 922 | if (!size0 && !size1) { |
Bjorn Helgaas | 865df57 | 2009-11-04 10:32:57 -0700 | [diff] [blame] | 923 | if (b_res->start || b_res->end) |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 924 | pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n", |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 925 | b_res, &bus->busn_res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | b_res->flags = 0; |
| 927 | return; |
| 928 | } |
Yinghai Lu | fd59134 | 2012-07-09 19:55:29 -0600 | [diff] [blame] | 929 | |
| 930 | b_res->start = min_align; |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 931 | b_res->end = b_res->start + size0 - 1; |
Ivan Kokshaysky | 8845256 | 2008-03-30 19:50:14 +0400 | [diff] [blame] | 932 | b_res->flags |= IORESOURCE_STARTALIGN; |
Yinghai Lu | b592443 | 2012-01-21 02:08:31 -0800 | [diff] [blame] | 933 | if (size1 > size0 && realloc_head) { |
Yinghai Lu | fd59134 | 2012-07-09 19:55:29 -0600 | [diff] [blame] | 934 | add_to_list(realloc_head, bus->self, b_res, size1-size0, |
| 935 | min_align); |
Mohan Kumar | 34c6b71 | 2019-04-20 07:07:20 +0300 | [diff] [blame] | 936 | pci_info(bus->self, "bridge window %pR to %pR add_size %llx\n", |
| 937 | b_res, &bus->busn_res, |
| 938 | (unsigned long long) size1 - size0); |
Yinghai Lu | b592443 | 2012-01-21 02:08:31 -0800 | [diff] [blame] | 939 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | } |
| 941 | |
Gavin Shan | c121504 | 2012-09-11 16:59:46 -0600 | [diff] [blame] | 942 | static inline resource_size_t calculate_mem_align(resource_size_t *aligns, |
| 943 | int max_order) |
| 944 | { |
| 945 | resource_size_t align = 0; |
| 946 | resource_size_t min_align = 0; |
| 947 | int order; |
| 948 | |
| 949 | for (order = 0; order <= max_order; order++) { |
| 950 | resource_size_t align1 = 1; |
| 951 | |
| 952 | align1 <<= (order + 20); |
| 953 | |
| 954 | if (!align) |
| 955 | min_align = align1; |
| 956 | else if (ALIGN(align + min_align, min_align) < align1) |
| 957 | min_align = align1 >> 1; |
| 958 | align += aligns[order]; |
| 959 | } |
| 960 | |
| 961 | return min_align; |
| 962 | } |
| 963 | |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 964 | /** |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 965 | * pbus_size_mem() - Size the memory window of a given bus |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 966 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 967 | * @bus: The bus |
| 968 | * @mask: Mask the resource flag, then compare it with type |
| 969 | * @type: The type of free resource from bridge |
| 970 | * @type2: Second match type |
| 971 | * @type3: Third match type |
| 972 | * @min_size: The minimum memory window that must be allocated |
| 973 | * @add_size: Additional optional memory window |
| 974 | * @realloc_head: Track the additional memory window on this list |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 975 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 976 | * Calculate the size of the bus and minimal alignment which guarantees |
| 977 | * that all child resources fit in this size. |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 978 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 979 | * Return -ENOSPC if there's no available bus resource of the desired |
| 980 | * type. Otherwise, set the bus resource start/end to indicate the |
| 981 | * required size, add things to realloc_head (if supplied), and return 0. |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 982 | */ |
Eric W. Biederman | 2876048 | 2009-09-09 14:09:24 -0700 | [diff] [blame] | 983 | static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 984 | unsigned long type, unsigned long type2, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 985 | unsigned long type3, resource_size_t min_size, |
| 986 | resource_size_t add_size, |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 987 | struct list_head *realloc_head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | { |
| 989 | struct pci_dev *dev; |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 990 | resource_size_t min_align, align, size, size0, size1; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 991 | resource_size_t aligns[18]; /* Alignments from 1MB to 128GB */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | int order, max_order; |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 993 | struct resource *b_res = find_bus_resource_of_type(bus, |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 994 | mask | IORESOURCE_PREFETCH, type); |
Yinghai Lu | be76891 | 2011-07-25 13:08:38 -0700 | [diff] [blame] | 995 | resource_size_t children_add_size = 0; |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 996 | resource_size_t children_add_align = 0; |
| 997 | resource_size_t add_align = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | |
| 999 | if (!b_res) |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 1000 | return -ENOSPC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | |
Nicholas Johnson | c13704f | 2019-11-13 15:25:28 +0000 | [diff] [blame] | 1002 | /* If resource is already assigned, nothing more to do */ |
| 1003 | if (b_res->parent) |
| 1004 | return 0; |
| 1005 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | memset(aligns, 0, sizeof(aligns)); |
| 1007 | max_order = 0; |
| 1008 | size = 0; |
| 1009 | |
| 1010 | list_for_each_entry(dev, &bus->devices, bus_list) { |
| 1011 | int i; |
Yinghai Lu | 1f82de1 | 2009-04-23 20:48:32 -0700 | [diff] [blame] | 1012 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { |
| 1014 | struct resource *r = &dev->resource[i]; |
Benjamin Herrenschmidt | c40a22e | 2007-12-10 17:32:15 +1100 | [diff] [blame] | 1015 | resource_size_t r_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
David Daney | a2220d8 | 2015-10-29 17:35:39 -0500 | [diff] [blame] | 1017 | if (r->parent || (r->flags & IORESOURCE_PCI_FIXED) || |
| 1018 | ((r->flags & mask) != type && |
| 1019 | (r->flags & mask) != type2 && |
| 1020 | (r->flags & mask) != type3)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | continue; |
Zhao, Yu | 022edd8 | 2008-10-13 19:24:28 +0800 | [diff] [blame] | 1022 | r_size = resource_size(r); |
Yinghai Lu | 2aceefc | 2011-07-25 13:08:40 -0700 | [diff] [blame] | 1023 | #ifdef CONFIG_PCI_IOV |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1024 | /* Put SRIOV requested res to the optional list */ |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 1025 | if (realloc_head && i >= PCI_IOV_RESOURCES && |
Yinghai Lu | 2aceefc | 2011-07-25 13:08:40 -0700 | [diff] [blame] | 1026 | i <= PCI_IOV_RESOURCE_END) { |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 1027 | add_align = max(pci_resource_alignment(dev, r), add_align); |
Yinghai Lu | 2aceefc | 2011-07-25 13:08:40 -0700 | [diff] [blame] | 1028 | r->end = r->start - 1; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1029 | add_to_list(realloc_head, dev, r, r_size, 0 /* Don't care */); |
Yinghai Lu | 2aceefc | 2011-07-25 13:08:40 -0700 | [diff] [blame] | 1030 | children_add_size += r_size; |
| 1031 | continue; |
| 1032 | } |
| 1033 | #endif |
Alan | 14c8530 | 2014-05-19 14:03:14 +0100 | [diff] [blame] | 1034 | /* |
| 1035 | * aligns[0] is for 1MB (since bridge memory |
| 1036 | * windows are always at least 1MB aligned), so |
| 1037 | * keep "order" from being negative for smaller |
| 1038 | * resources. |
| 1039 | */ |
Chris Wright | 6faf17f | 2009-08-28 13:00:06 -0700 | [diff] [blame] | 1040 | align = pci_resource_alignment(dev, r); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | order = __ffs(align) - 20; |
Alan | 14c8530 | 2014-05-19 14:03:14 +0100 | [diff] [blame] | 1042 | if (order < 0) |
| 1043 | order = 0; |
| 1044 | if (order >= ARRAY_SIZE(aligns)) { |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 1045 | pci_warn(dev, "disabling BAR %d: %pR (bad alignment %#llx)\n", |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1046 | i, r, (unsigned long long) align); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | r->flags = 0; |
| 1048 | continue; |
| 1049 | } |
Yongji Xie | c9c7514 | 2017-04-10 19:58:11 +0800 | [diff] [blame] | 1050 | size += max(r_size, align); |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1051 | /* |
| 1052 | * Exclude ranges with size > align from calculation of |
| 1053 | * the alignment. |
| 1054 | */ |
Yongji Xie | c9c7514 | 2017-04-10 19:58:11 +0800 | [diff] [blame] | 1055 | if (r_size <= align) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | aligns[order] += align; |
| 1057 | if (order > max_order) |
| 1058 | max_order = order; |
Yinghai Lu | be76891 | 2011-07-25 13:08:38 -0700 | [diff] [blame] | 1059 | |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 1060 | if (realloc_head) { |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 1061 | children_add_size += get_res_add_size(realloc_head, r); |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 1062 | children_add_align = get_res_add_align(realloc_head, r); |
| 1063 | add_align = max(add_align, children_add_align); |
| 1064 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | } |
| 1066 | } |
Jeremy Fitzhardinge | 8308c54 | 2008-09-11 01:31:50 -0700 | [diff] [blame] | 1067 | |
Gavin Shan | c121504 | 2012-09-11 16:59:46 -0600 | [diff] [blame] | 1068 | min_align = calculate_mem_align(aligns, max_order); |
Wei Yang | 3ad94b0 | 2013-09-06 09:45:58 +0800 | [diff] [blame] | 1069 | min_align = max(min_align, window_alignment(bus, b_res->flags)); |
Jon Derrick | de3ffa3 | 2018-09-25 12:39:06 -0600 | [diff] [blame] | 1070 | size0 = calculate_memsize(size, min_size, 0, 0, resource_size(b_res), min_align); |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 1071 | add_align = max(min_align, add_align); |
Jon Derrick | de3ffa3 | 2018-09-25 12:39:06 -0600 | [diff] [blame] | 1072 | size1 = (!realloc_head || (realloc_head && !add_size && !children_add_size)) ? size0 : |
| 1073 | calculate_memsize(size, min_size, add_size, children_add_size, |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 1074 | resource_size(b_res), add_align); |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 1075 | if (!size0 && !size1) { |
Bjorn Helgaas | 865df57 | 2009-11-04 10:32:57 -0700 | [diff] [blame] | 1076 | if (b_res->start || b_res->end) |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 1077 | pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n", |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1078 | b_res, &bus->busn_res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | b_res->flags = 0; |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 1080 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | } |
| 1082 | b_res->start = min_align; |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 1083 | b_res->end = size0 + min_align - 1; |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1084 | b_res->flags |= IORESOURCE_STARTALIGN; |
Yinghai Lu | b592443 | 2012-01-21 02:08:31 -0800 | [diff] [blame] | 1085 | if (size1 > size0 && realloc_head) { |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 1086 | add_to_list(realloc_head, bus->self, b_res, size1-size0, add_align); |
Mohan Kumar | 34c6b71 | 2019-04-20 07:07:20 +0300 | [diff] [blame] | 1087 | pci_info(bus->self, "bridge window %pR to %pR add_size %llx add_align %llx\n", |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1088 | b_res, &bus->busn_res, |
Wei Yang | d74b902 | 2015-03-25 16:23:51 +0800 | [diff] [blame] | 1089 | (unsigned long long) (size1 - size0), |
| 1090 | (unsigned long long) add_align); |
Yinghai Lu | b592443 | 2012-01-21 02:08:31 -0800 | [diff] [blame] | 1091 | } |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 1092 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | } |
| 1094 | |
Ram Pai | 0a2daa1 | 2011-07-25 13:08:41 -0700 | [diff] [blame] | 1095 | unsigned long pci_cardbus_resource_alignment(struct resource *res) |
| 1096 | { |
| 1097 | if (res->flags & IORESOURCE_IO) |
| 1098 | return pci_cardbus_io_size; |
| 1099 | if (res->flags & IORESOURCE_MEM) |
| 1100 | return pci_cardbus_mem_size; |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | static void pci_bus_size_cardbus(struct pci_bus *bus, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1105 | struct list_head *realloc_head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | { |
| 1107 | struct pci_dev *bridge = bus->self; |
| 1108 | struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; |
Yinghai Lu | 1184893 | 2012-02-10 15:33:47 -0800 | [diff] [blame] | 1109 | resource_size_t b_res_3_size = pci_cardbus_mem_size * 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | u16 ctrl; |
| 1111 | |
Yinghai Lu | 3796f1e | 2012-02-10 15:33:48 -0800 | [diff] [blame] | 1112 | if (b_res[0].parent) |
| 1113 | goto handle_b_res_1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1115 | * Reserve some resources for CardBus. We reserve a fixed amount |
| 1116 | * of bus space for CardBus bridges. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | */ |
Yinghai Lu | 1184893 | 2012-02-10 15:33:47 -0800 | [diff] [blame] | 1118 | b_res[0].start = pci_cardbus_io_size; |
| 1119 | b_res[0].end = b_res[0].start + pci_cardbus_io_size - 1; |
| 1120 | b_res[0].flags |= IORESOURCE_IO | IORESOURCE_STARTALIGN; |
| 1121 | if (realloc_head) { |
| 1122 | b_res[0].end -= pci_cardbus_io_size; |
| 1123 | add_to_list(realloc_head, bridge, b_res, pci_cardbus_io_size, |
| 1124 | pci_cardbus_io_size); |
| 1125 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | |
Yinghai Lu | 3796f1e | 2012-02-10 15:33:48 -0800 | [diff] [blame] | 1127 | handle_b_res_1: |
| 1128 | if (b_res[1].parent) |
| 1129 | goto handle_b_res_2; |
Yinghai Lu | 1184893 | 2012-02-10 15:33:47 -0800 | [diff] [blame] | 1130 | b_res[1].start = pci_cardbus_io_size; |
| 1131 | b_res[1].end = b_res[1].start + pci_cardbus_io_size - 1; |
| 1132 | b_res[1].flags |= IORESOURCE_IO | IORESOURCE_STARTALIGN; |
| 1133 | if (realloc_head) { |
| 1134 | b_res[1].end -= pci_cardbus_io_size; |
| 1135 | add_to_list(realloc_head, bridge, b_res+1, pci_cardbus_io_size, |
| 1136 | pci_cardbus_io_size); |
| 1137 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | |
Yinghai Lu | 3796f1e | 2012-02-10 15:33:48 -0800 | [diff] [blame] | 1139 | handle_b_res_2: |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1140 | /* MEM1 must not be pref MMIO */ |
Yinghai Lu | dcef0d0 | 2012-02-10 15:33:46 -0800 | [diff] [blame] | 1141 | pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); |
| 1142 | if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM1) { |
| 1143 | ctrl &= ~PCI_CB_BRIDGE_CTL_PREFETCH_MEM1; |
| 1144 | pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); |
| 1145 | pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); |
| 1146 | } |
| 1147 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1148 | /* Check whether prefetchable memory is supported by this bridge. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); |
| 1150 | if (!(ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0)) { |
| 1151 | ctrl |= PCI_CB_BRIDGE_CTL_PREFETCH_MEM0; |
| 1152 | pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); |
| 1153 | pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); |
| 1154 | } |
| 1155 | |
Yinghai Lu | 3796f1e | 2012-02-10 15:33:48 -0800 | [diff] [blame] | 1156 | if (b_res[2].parent) |
| 1157 | goto handle_b_res_3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1159 | * If we have prefetchable memory support, allocate two regions. |
| 1160 | * Otherwise, allocate one region of twice the size. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | */ |
| 1162 | if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) { |
Yinghai Lu | 1184893 | 2012-02-10 15:33:47 -0800 | [diff] [blame] | 1163 | b_res[2].start = pci_cardbus_mem_size; |
| 1164 | b_res[2].end = b_res[2].start + pci_cardbus_mem_size - 1; |
| 1165 | b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | |
| 1166 | IORESOURCE_STARTALIGN; |
| 1167 | if (realloc_head) { |
| 1168 | b_res[2].end -= pci_cardbus_mem_size; |
| 1169 | add_to_list(realloc_head, bridge, b_res+2, |
| 1170 | pci_cardbus_mem_size, pci_cardbus_mem_size); |
| 1171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1173 | /* Reduce that to half */ |
Yinghai Lu | 1184893 | 2012-02-10 15:33:47 -0800 | [diff] [blame] | 1174 | b_res_3_size = pci_cardbus_mem_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | } |
Ram Pai | 0a2daa1 | 2011-07-25 13:08:41 -0700 | [diff] [blame] | 1176 | |
Yinghai Lu | 3796f1e | 2012-02-10 15:33:48 -0800 | [diff] [blame] | 1177 | handle_b_res_3: |
| 1178 | if (b_res[3].parent) |
| 1179 | goto handle_done; |
Yinghai Lu | 1184893 | 2012-02-10 15:33:47 -0800 | [diff] [blame] | 1180 | b_res[3].start = pci_cardbus_mem_size; |
| 1181 | b_res[3].end = b_res[3].start + b_res_3_size - 1; |
| 1182 | b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_STARTALIGN; |
| 1183 | if (realloc_head) { |
| 1184 | b_res[3].end -= b_res_3_size; |
| 1185 | add_to_list(realloc_head, bridge, b_res+3, b_res_3_size, |
| 1186 | pci_cardbus_mem_size); |
| 1187 | } |
Yinghai Lu | 3796f1e | 2012-02-10 15:33:48 -0800 | [diff] [blame] | 1188 | |
| 1189 | handle_done: |
| 1190 | ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | } |
| 1192 | |
Bjorn Helgaas | 10874f5a | 2014-04-14 16:11:40 -0600 | [diff] [blame] | 1193 | void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | { |
| 1195 | struct pci_dev *dev; |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1196 | unsigned long mask, prefmask, type2 = 0, type3 = 0; |
Nicholas Johnson | d7b8a21 | 2019-10-23 12:12:29 +0000 | [diff] [blame] | 1197 | resource_size_t additional_io_size = 0, additional_mmio_size = 0, |
| 1198 | additional_mmio_pref_size = 0; |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1199 | struct resource *b_res; |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 1200 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | |
| 1202 | list_for_each_entry(dev, &bus->devices, bus_list) { |
| 1203 | struct pci_bus *b = dev->subordinate; |
| 1204 | if (!b) |
| 1205 | continue; |
| 1206 | |
Honghui Zhang | b2fb5cc | 2018-10-16 18:44:43 +0800 | [diff] [blame] | 1207 | switch (dev->hdr_type) { |
| 1208 | case PCI_HEADER_TYPE_CARDBUS: |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 1209 | pci_bus_size_cardbus(b, realloc_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | break; |
| 1211 | |
Honghui Zhang | b2fb5cc | 2018-10-16 18:44:43 +0800 | [diff] [blame] | 1212 | case PCI_HEADER_TYPE_BRIDGE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | default: |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 1214 | __pci_bus_size_bridges(b, realloc_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | break; |
| 1216 | } |
| 1217 | } |
| 1218 | |
| 1219 | /* The root bus? */ |
Wei Yang | 2ba29e2 | 2013-09-06 09:45:56 +0800 | [diff] [blame] | 1220 | if (pci_is_root_bus(bus)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | return; |
| 1222 | |
Honghui Zhang | b2fb5cc | 2018-10-16 18:44:43 +0800 | [diff] [blame] | 1223 | switch (bus->self->hdr_type) { |
| 1224 | case PCI_HEADER_TYPE_CARDBUS: |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1225 | /* Don't size CardBuses yet */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | break; |
| 1227 | |
Honghui Zhang | b2fb5cc | 2018-10-16 18:44:43 +0800 | [diff] [blame] | 1228 | case PCI_HEADER_TYPE_BRIDGE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | pci_bridge_check_ranges(bus); |
Eric W. Biederman | 2876048 | 2009-09-09 14:09:24 -0700 | [diff] [blame] | 1230 | if (bus->self->is_hotplug_bridge) { |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 1231 | additional_io_size = pci_hotplug_io_size; |
Nicholas Johnson | d7b8a21 | 2019-10-23 12:12:29 +0000 | [diff] [blame] | 1232 | additional_mmio_size = pci_hotplug_mmio_size; |
| 1233 | additional_mmio_pref_size = pci_hotplug_mmio_pref_size; |
Eric W. Biederman | 2876048 | 2009-09-09 14:09:24 -0700 | [diff] [blame] | 1234 | } |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1235 | /* Fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | default: |
Yinghai Lu | 19aa7ee | 2012-01-21 02:08:24 -0800 | [diff] [blame] | 1237 | pbus_size_io(bus, realloc_head ? 0 : additional_io_size, |
| 1238 | additional_io_size, realloc_head); |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1239 | |
| 1240 | /* |
| 1241 | * If there's a 64-bit prefetchable MMIO window, compute |
| 1242 | * the size required to put all 64-bit prefetchable |
| 1243 | * resources in it. |
| 1244 | */ |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1245 | b_res = &bus->self->resource[PCI_BRIDGE_RESOURCES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | mask = IORESOURCE_MEM; |
| 1247 | prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH; |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1248 | if (b_res[2].flags & IORESOURCE_MEM_64) { |
| 1249 | prefmask |= IORESOURCE_MEM_64; |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 1250 | ret = pbus_size_mem(bus, prefmask, prefmask, |
Nicholas Johnson | d7b8a21 | 2019-10-23 12:12:29 +0000 | [diff] [blame] | 1251 | prefmask, prefmask, |
| 1252 | realloc_head ? 0 : additional_mmio_pref_size, |
| 1253 | additional_mmio_pref_size, realloc_head); |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1254 | |
| 1255 | /* |
| 1256 | * If successful, all non-prefetchable resources |
| 1257 | * and any 32-bit prefetchable resources will go in |
| 1258 | * the non-prefetchable window. |
| 1259 | */ |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 1260 | if (ret == 0) { |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 1261 | mask = prefmask; |
| 1262 | type2 = prefmask & ~IORESOURCE_MEM_64; |
| 1263 | type3 = prefmask & ~IORESOURCE_PREFETCH; |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1264 | } |
| 1265 | } |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1266 | |
| 1267 | /* |
| 1268 | * If there is no 64-bit prefetchable window, compute the |
| 1269 | * size required to put all prefetchable resources in the |
| 1270 | * 32-bit prefetchable window (if there is one). |
| 1271 | */ |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1272 | if (!type2) { |
| 1273 | prefmask &= ~IORESOURCE_MEM_64; |
Bjorn Helgaas | 30afe8d | 2014-05-19 18:28:37 -0600 | [diff] [blame] | 1274 | ret = pbus_size_mem(bus, prefmask, prefmask, |
Nicholas Johnson | d7b8a21 | 2019-10-23 12:12:29 +0000 | [diff] [blame] | 1275 | prefmask, prefmask, |
| 1276 | realloc_head ? 0 : additional_mmio_pref_size, |
| 1277 | additional_mmio_pref_size, realloc_head); |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1278 | |
| 1279 | /* |
| 1280 | * If successful, only non-prefetchable resources |
| 1281 | * will go in the non-prefetchable window. |
| 1282 | */ |
| 1283 | if (ret == 0) |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1284 | mask = prefmask; |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1285 | else |
Nicholas Johnson | d7b8a21 | 2019-10-23 12:12:29 +0000 | [diff] [blame] | 1286 | additional_mmio_size += additional_mmio_pref_size; |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1287 | |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1288 | type2 = type3 = IORESOURCE_MEM; |
| 1289 | } |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1290 | |
| 1291 | /* |
| 1292 | * Compute the size required to put everything else in the |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1293 | * non-prefetchable window. This includes: |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1294 | * |
| 1295 | * - all non-prefetchable resources |
| 1296 | * - 32-bit prefetchable resources if there's a 64-bit |
| 1297 | * prefetchable window or no prefetchable window at all |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1298 | * - 64-bit prefetchable resources if there's no prefetchable |
| 1299 | * window at all |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1300 | * |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1301 | * Note that the strategy in __pci_assign_resource() must match |
| 1302 | * that used here. Specifically, we cannot put a 32-bit |
| 1303 | * prefetchable resource in a 64-bit prefetchable window. |
Bjorn Helgaas | 67d29b5 | 2014-05-19 18:32:18 -0600 | [diff] [blame] | 1304 | */ |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1305 | pbus_size_mem(bus, mask, IORESOURCE_MEM, type2, type3, |
Nicholas Johnson | d7b8a21 | 2019-10-23 12:12:29 +0000 | [diff] [blame] | 1306 | realloc_head ? 0 : additional_mmio_size, |
| 1307 | additional_mmio_size, realloc_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | break; |
| 1309 | } |
| 1310 | } |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 1311 | |
Bjorn Helgaas | 10874f5a | 2014-04-14 16:11:40 -0600 | [diff] [blame] | 1312 | void pci_bus_size_bridges(struct pci_bus *bus) |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 1313 | { |
| 1314 | __pci_bus_size_bridges(bus, NULL); |
| 1315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | EXPORT_SYMBOL(pci_bus_size_bridges); |
| 1317 | |
David Daney | d04d011 | 2015-10-29 17:35:39 -0500 | [diff] [blame] | 1318 | static void assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r) |
| 1319 | { |
| 1320 | int i; |
| 1321 | struct resource *parent_r; |
| 1322 | unsigned long mask = IORESOURCE_IO | IORESOURCE_MEM | |
| 1323 | IORESOURCE_PREFETCH; |
| 1324 | |
| 1325 | pci_bus_for_each_resource(b, parent_r, i) { |
| 1326 | if (!parent_r) |
| 1327 | continue; |
| 1328 | |
| 1329 | if ((r->flags & mask) == (parent_r->flags & mask) && |
| 1330 | resource_contains(parent_r, r)) |
| 1331 | request_resource(parent_r, r); |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1336 | * Try to assign any resources marked as IORESOURCE_PCI_FIXED, as they are |
| 1337 | * skipped by pbus_assign_resources_sorted(). |
David Daney | d04d011 | 2015-10-29 17:35:39 -0500 | [diff] [blame] | 1338 | */ |
| 1339 | static void pdev_assign_fixed_resources(struct pci_dev *dev) |
| 1340 | { |
| 1341 | int i; |
| 1342 | |
| 1343 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { |
| 1344 | struct pci_bus *b; |
| 1345 | struct resource *r = &dev->resource[i]; |
| 1346 | |
| 1347 | if (r->parent || !(r->flags & IORESOURCE_PCI_FIXED) || |
| 1348 | !(r->flags & (IORESOURCE_IO | IORESOURCE_MEM))) |
| 1349 | continue; |
| 1350 | |
| 1351 | b = dev->bus; |
| 1352 | while (b && !r->parent) { |
| 1353 | assign_fixed_resource_on_bus(b, r); |
| 1354 | b = b->parent; |
| 1355 | } |
| 1356 | } |
| 1357 | } |
| 1358 | |
Bjorn Helgaas | 10874f5a | 2014-04-14 16:11:40 -0600 | [diff] [blame] | 1359 | void __pci_bus_assign_resources(const struct pci_bus *bus, |
| 1360 | struct list_head *realloc_head, |
| 1361 | struct list_head *fail_head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | { |
| 1363 | struct pci_bus *b; |
| 1364 | struct pci_dev *dev; |
| 1365 | |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 1366 | pbus_assign_resources_sorted(bus, realloc_head, fail_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | list_for_each_entry(dev, &bus->devices, bus_list) { |
David Daney | d04d011 | 2015-10-29 17:35:39 -0500 | [diff] [blame] | 1369 | pdev_assign_fixed_resources(dev); |
| 1370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | b = dev->subordinate; |
| 1372 | if (!b) |
| 1373 | continue; |
| 1374 | |
Ram Pai | 9e8bf93 | 2011-07-25 13:08:42 -0700 | [diff] [blame] | 1375 | __pci_bus_assign_resources(b, realloc_head, fail_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | |
Honghui Zhang | b2fb5cc | 2018-10-16 18:44:43 +0800 | [diff] [blame] | 1377 | switch (dev->hdr_type) { |
| 1378 | case PCI_HEADER_TYPE_BRIDGE: |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 1379 | if (!pci_is_enabled(dev)) |
| 1380 | pci_setup_bridge(b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | break; |
| 1382 | |
Honghui Zhang | b2fb5cc | 2018-10-16 18:44:43 +0800 | [diff] [blame] | 1383 | case PCI_HEADER_TYPE_CARDBUS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | pci_setup_cardbus(b); |
| 1385 | break; |
| 1386 | |
| 1387 | default: |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 1388 | pci_info(dev, "not setting up bridge for bus %04x:%02x\n", |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1389 | pci_domain_nr(b), b->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | break; |
| 1391 | } |
| 1392 | } |
| 1393 | } |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 1394 | |
Bjorn Helgaas | 10874f5a | 2014-04-14 16:11:40 -0600 | [diff] [blame] | 1395 | void pci_bus_assign_resources(const struct pci_bus *bus) |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 1396 | { |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 1397 | __pci_bus_assign_resources(bus, NULL, NULL); |
Yinghai Lu | 568ddef | 2010-01-22 01:02:21 -0800 | [diff] [blame] | 1398 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | EXPORT_SYMBOL(pci_bus_assign_resources); |
| 1400 | |
Lorenzo Pieralisi | 765bf9b | 2016-06-08 12:04:47 +0100 | [diff] [blame] | 1401 | static void pci_claim_device_resources(struct pci_dev *dev) |
| 1402 | { |
| 1403 | int i; |
| 1404 | |
| 1405 | for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) { |
| 1406 | struct resource *r = &dev->resource[i]; |
| 1407 | |
| 1408 | if (!r->flags || r->parent) |
| 1409 | continue; |
| 1410 | |
| 1411 | pci_claim_resource(dev, i); |
| 1412 | } |
| 1413 | } |
| 1414 | |
| 1415 | static void pci_claim_bridge_resources(struct pci_dev *dev) |
| 1416 | { |
| 1417 | int i; |
| 1418 | |
| 1419 | for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) { |
| 1420 | struct resource *r = &dev->resource[i]; |
| 1421 | |
| 1422 | if (!r->flags || r->parent) |
| 1423 | continue; |
| 1424 | |
| 1425 | pci_claim_bridge_resource(dev, i); |
| 1426 | } |
| 1427 | } |
| 1428 | |
| 1429 | static void pci_bus_allocate_dev_resources(struct pci_bus *b) |
| 1430 | { |
| 1431 | struct pci_dev *dev; |
| 1432 | struct pci_bus *child; |
| 1433 | |
| 1434 | list_for_each_entry(dev, &b->devices, bus_list) { |
| 1435 | pci_claim_device_resources(dev); |
| 1436 | |
| 1437 | child = dev->subordinate; |
| 1438 | if (child) |
| 1439 | pci_bus_allocate_dev_resources(child); |
| 1440 | } |
| 1441 | } |
| 1442 | |
| 1443 | static void pci_bus_allocate_resources(struct pci_bus *b) |
| 1444 | { |
| 1445 | struct pci_bus *child; |
| 1446 | |
| 1447 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1448 | * Carry out a depth-first search on the PCI bus tree to allocate |
| 1449 | * bridge apertures. Read the programmed bridge bases and |
| 1450 | * recursively claim the respective bridge resources. |
Lorenzo Pieralisi | 765bf9b | 2016-06-08 12:04:47 +0100 | [diff] [blame] | 1451 | */ |
| 1452 | if (b->self) { |
| 1453 | pci_read_bridge_bases(b); |
| 1454 | pci_claim_bridge_resources(b->self); |
| 1455 | } |
| 1456 | |
| 1457 | list_for_each_entry(child, &b->children, node) |
| 1458 | pci_bus_allocate_resources(child); |
| 1459 | } |
| 1460 | |
| 1461 | void pci_bus_claim_resources(struct pci_bus *b) |
| 1462 | { |
| 1463 | pci_bus_allocate_resources(b); |
| 1464 | pci_bus_allocate_dev_resources(b); |
| 1465 | } |
| 1466 | EXPORT_SYMBOL(pci_bus_claim_resources); |
| 1467 | |
Bjorn Helgaas | 10874f5a | 2014-04-14 16:11:40 -0600 | [diff] [blame] | 1468 | static void __pci_bridge_assign_resources(const struct pci_dev *bridge, |
| 1469 | struct list_head *add_head, |
| 1470 | struct list_head *fail_head) |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 1471 | { |
| 1472 | struct pci_bus *b; |
| 1473 | |
Yinghai Lu | 8424d75 | 2012-01-21 02:08:21 -0800 | [diff] [blame] | 1474 | pdev_assign_resources_sorted((struct pci_dev *)bridge, |
| 1475 | add_head, fail_head); |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 1476 | |
| 1477 | b = bridge->subordinate; |
| 1478 | if (!b) |
| 1479 | return; |
| 1480 | |
Yinghai Lu | 8424d75 | 2012-01-21 02:08:21 -0800 | [diff] [blame] | 1481 | __pci_bus_assign_resources(b, add_head, fail_head); |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 1482 | |
| 1483 | switch (bridge->class >> 8) { |
| 1484 | case PCI_CLASS_BRIDGE_PCI: |
| 1485 | pci_setup_bridge(b); |
| 1486 | break; |
| 1487 | |
| 1488 | case PCI_CLASS_BRIDGE_CARDBUS: |
| 1489 | pci_setup_cardbus(b); |
| 1490 | break; |
| 1491 | |
| 1492 | default: |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 1493 | pci_info(bridge, "not setting up bridge for bus %04x:%02x\n", |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1494 | pci_domain_nr(b), b->number); |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 1495 | break; |
| 1496 | } |
| 1497 | } |
Christian König | cb21bc9 | 2017-10-18 15:58:17 +0200 | [diff] [blame] | 1498 | |
| 1499 | #define PCI_RES_TYPE_MASK \ |
| 1500 | (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH |\ |
| 1501 | IORESOURCE_MEM_64) |
| 1502 | |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1503 | static void pci_bridge_release_resources(struct pci_bus *bus, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1504 | unsigned long type) |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1505 | { |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1506 | struct pci_dev *dev = bus->self; |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1507 | struct resource *r; |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1508 | unsigned old_flags = 0; |
| 1509 | struct resource *b_res; |
| 1510 | int idx = 1; |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1511 | |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1512 | b_res = &dev->resource[PCI_BRIDGE_RESOURCES]; |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1513 | |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1514 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1515 | * 1. If IO port assignment fails, release bridge IO port. |
| 1516 | * 2. If non pref MMIO assignment fails, release bridge nonpref MMIO. |
| 1517 | * 3. If 64bit pref MMIO assignment fails, and bridge pref is 64bit, |
| 1518 | * release bridge pref MMIO. |
| 1519 | * 4. If pref MMIO assignment fails, and bridge pref is 32bit, |
| 1520 | * release bridge pref MMIO. |
| 1521 | * 5. If pref MMIO assignment fails, and bridge pref is not |
| 1522 | * assigned, release bridge nonpref MMIO. |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1523 | */ |
| 1524 | if (type & IORESOURCE_IO) |
| 1525 | idx = 0; |
| 1526 | else if (!(type & IORESOURCE_PREFETCH)) |
| 1527 | idx = 1; |
| 1528 | else if ((type & IORESOURCE_MEM_64) && |
| 1529 | (b_res[2].flags & IORESOURCE_MEM_64)) |
| 1530 | idx = 2; |
| 1531 | else if (!(b_res[2].flags & IORESOURCE_MEM_64) && |
| 1532 | (b_res[2].flags & IORESOURCE_PREFETCH)) |
| 1533 | idx = 2; |
| 1534 | else |
| 1535 | idx = 1; |
| 1536 | |
| 1537 | r = &b_res[idx]; |
| 1538 | |
| 1539 | if (!r->parent) |
| 1540 | return; |
| 1541 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1542 | /* If there are children, release them all */ |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1543 | release_child_resources(r); |
| 1544 | if (!release_resource(r)) { |
Christian König | cb21bc9 | 2017-10-18 15:58:17 +0200 | [diff] [blame] | 1545 | type = old_flags = r->flags & PCI_RES_TYPE_MASK; |
Mohan Kumar | 34c6b71 | 2019-04-20 07:07:20 +0300 | [diff] [blame] | 1546 | pci_info(dev, "resource %d %pR released\n", |
| 1547 | PCI_BRIDGE_RESOURCES + idx, r); |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1548 | /* Keep the old size */ |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1549 | r->end = resource_size(r) - 1; |
| 1550 | r->start = 0; |
| 1551 | r->flags = 0; |
| 1552 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1553 | /* Avoiding touch the one without PREF */ |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1554 | if (type & IORESOURCE_PREFETCH) |
| 1555 | type = IORESOURCE_PREFETCH; |
| 1556 | __pci_setup_bridge(bus, type); |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1557 | /* For next child res under same bridge */ |
Yinghai Lu | 5b28541 | 2014-05-19 17:01:55 -0600 | [diff] [blame] | 1558 | r->flags = old_flags; |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1559 | } |
| 1560 | } |
| 1561 | |
| 1562 | enum release_type { |
| 1563 | leaf_only, |
| 1564 | whole_subtree, |
| 1565 | }; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1566 | |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1567 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1568 | * Try to release PCI bridge resources from leaf bridge, so we can allocate |
| 1569 | * a larger window later. |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1570 | */ |
Bjorn Helgaas | 10874f5a | 2014-04-14 16:11:40 -0600 | [diff] [blame] | 1571 | static void pci_bus_release_bridge_resources(struct pci_bus *bus, |
| 1572 | unsigned long type, |
| 1573 | enum release_type rel_type) |
Yinghai Lu | 5009b46 | 2010-01-22 01:02:20 -0800 | [diff] [blame] | 1574 | { |
| 1575 | struct pci_dev *dev; |
| 1576 | bool is_leaf_bridge = true; |
| 1577 | |
| 1578 | list_for_each_entry(dev, &bus->devices, bus_list) { |
| 1579 | struct pci_bus *b = dev->subordinate; |
| 1580 | if (!b) |
| 1581 | continue; |
| 1582 | |
| 1583 | is_leaf_bridge = false; |
| 1584 | |
| 1585 | if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) |
| 1586 | continue; |
| 1587 | |
| 1588 | if (rel_type == whole_subtree) |
| 1589 | pci_bus_release_bridge_resources(b, type, |
| 1590 | whole_subtree); |
| 1591 | } |
| 1592 | |
| 1593 | if (pci_is_root_bus(bus)) |
| 1594 | return; |
| 1595 | |
| 1596 | if ((bus->self->class >> 8) != PCI_CLASS_BRIDGE_PCI) |
| 1597 | return; |
| 1598 | |
| 1599 | if ((rel_type == whole_subtree) || is_leaf_bridge) |
| 1600 | pci_bridge_release_resources(bus, type); |
| 1601 | } |
| 1602 | |
Yinghai Lu | 76fbc26 | 2008-06-23 20:33:06 +0200 | [diff] [blame] | 1603 | static void pci_bus_dump_res(struct pci_bus *bus) |
| 1604 | { |
Bjorn Helgaas | 89a74ec | 2010-02-23 10:24:31 -0700 | [diff] [blame] | 1605 | struct resource *res; |
| 1606 | int i; |
Yinghai Lu | 76fbc26 | 2008-06-23 20:33:06 +0200 | [diff] [blame] | 1607 | |
Bjorn Helgaas | 89a74ec | 2010-02-23 10:24:31 -0700 | [diff] [blame] | 1608 | pci_bus_for_each_resource(bus, res, i) { |
Yinghai Lu | 7c9342b | 2009-12-22 15:02:24 -0800 | [diff] [blame] | 1609 | if (!res || !res->end || !res->flags) |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 1610 | continue; |
Yinghai Lu | 76fbc26 | 2008-06-23 20:33:06 +0200 | [diff] [blame] | 1611 | |
Mohan Kumar | 34c6b71 | 2019-04-20 07:07:20 +0300 | [diff] [blame] | 1612 | dev_info(&bus->dev, "resource %d %pR\n", i, res); |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 1613 | } |
Yinghai Lu | 76fbc26 | 2008-06-23 20:33:06 +0200 | [diff] [blame] | 1614 | } |
| 1615 | |
| 1616 | static void pci_bus_dump_resources(struct pci_bus *bus) |
| 1617 | { |
| 1618 | struct pci_bus *b; |
| 1619 | struct pci_dev *dev; |
| 1620 | |
| 1621 | |
| 1622 | pci_bus_dump_res(bus); |
| 1623 | |
| 1624 | list_for_each_entry(dev, &bus->devices, bus_list) { |
| 1625 | b = dev->subordinate; |
| 1626 | if (!b) |
| 1627 | continue; |
| 1628 | |
| 1629 | pci_bus_dump_resources(b); |
| 1630 | } |
| 1631 | } |
| 1632 | |
Yinghai Lu | ff35147 | 2013-07-24 15:37:13 -0600 | [diff] [blame] | 1633 | static int pci_bus_get_depth(struct pci_bus *bus) |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1634 | { |
| 1635 | int depth = 0; |
Wei Yang | f2a230b | 2013-08-02 17:31:03 +0800 | [diff] [blame] | 1636 | struct pci_bus *child_bus; |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1637 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 1638 | list_for_each_entry(child_bus, &bus->children, node) { |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1639 | int ret; |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1640 | |
Wei Yang | f2a230b | 2013-08-02 17:31:03 +0800 | [diff] [blame] | 1641 | ret = pci_bus_get_depth(child_bus); |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1642 | if (ret + 1 > depth) |
| 1643 | depth = ret + 1; |
| 1644 | } |
| 1645 | |
| 1646 | return depth; |
| 1647 | } |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1648 | |
Yinghai Lu | b55438f | 2012-02-23 19:23:30 -0800 | [diff] [blame] | 1649 | /* |
| 1650 | * -1: undefined, will auto detect later |
| 1651 | * 0: disabled by user |
| 1652 | * 1: disabled by auto detect |
| 1653 | * 2: enabled by user |
| 1654 | * 3: enabled by auto detect |
| 1655 | */ |
| 1656 | enum enable_type { |
| 1657 | undefined = -1, |
| 1658 | user_disabled, |
| 1659 | auto_disabled, |
| 1660 | user_enabled, |
| 1661 | auto_enabled, |
| 1662 | }; |
| 1663 | |
Yinghai Lu | ff35147 | 2013-07-24 15:37:13 -0600 | [diff] [blame] | 1664 | static enum enable_type pci_realloc_enable = undefined; |
Yinghai Lu | b55438f | 2012-02-23 19:23:30 -0800 | [diff] [blame] | 1665 | void __init pci_realloc_get_opt(char *str) |
| 1666 | { |
| 1667 | if (!strncmp(str, "off", 3)) |
| 1668 | pci_realloc_enable = user_disabled; |
| 1669 | else if (!strncmp(str, "on", 2)) |
| 1670 | pci_realloc_enable = user_enabled; |
| 1671 | } |
Yinghai Lu | ff35147 | 2013-07-24 15:37:13 -0600 | [diff] [blame] | 1672 | static bool pci_realloc_enabled(enum enable_type enable) |
Yinghai Lu | b55438f | 2012-02-23 19:23:30 -0800 | [diff] [blame] | 1673 | { |
Yinghai Lu | 967260c | 2013-07-22 14:37:15 -0700 | [diff] [blame] | 1674 | return enable >= user_enabled; |
Yinghai Lu | b55438f | 2012-02-23 19:23:30 -0800 | [diff] [blame] | 1675 | } |
Ram Pai | f483d39 | 2011-07-07 11:19:10 -0700 | [diff] [blame] | 1676 | |
Yinghai Lu | b07f2eb | 2012-02-23 19:23:32 -0800 | [diff] [blame] | 1677 | #if defined(CONFIG_PCI_IOV) && defined(CONFIG_PCI_REALLOC_ENABLE_AUTO) |
Yinghai Lu | ff35147 | 2013-07-24 15:37:13 -0600 | [diff] [blame] | 1678 | static int iov_resources_unassigned(struct pci_dev *dev, void *data) |
Yinghai Lu | 223d96f | 2013-07-22 14:37:13 -0700 | [diff] [blame] | 1679 | { |
| 1680 | int i; |
| 1681 | bool *unassigned = data; |
Yinghai Lu | b07f2eb | 2012-02-23 19:23:32 -0800 | [diff] [blame] | 1682 | |
Denis Efremov | 39098ed | 2019-08-06 17:07:15 +0300 | [diff] [blame] | 1683 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { |
| 1684 | struct resource *r = &dev->resource[i + PCI_IOV_RESOURCES]; |
Yinghai Lu | fa216bf | 2013-07-22 14:37:14 -0700 | [diff] [blame] | 1685 | struct pci_bus_region region; |
Yinghai Lu | b07f2eb | 2012-02-23 19:23:32 -0800 | [diff] [blame] | 1686 | |
Yinghai Lu | 223d96f | 2013-07-22 14:37:13 -0700 | [diff] [blame] | 1687 | /* Not assigned or rejected by kernel? */ |
Yinghai Lu | fa216bf | 2013-07-22 14:37:14 -0700 | [diff] [blame] | 1688 | if (!r->flags) |
| 1689 | continue; |
Yinghai Lu | b07f2eb | 2012-02-23 19:23:32 -0800 | [diff] [blame] | 1690 | |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 1691 | pcibios_resource_to_bus(dev->bus, ®ion, r); |
Yinghai Lu | fa216bf | 2013-07-22 14:37:14 -0700 | [diff] [blame] | 1692 | if (!region.start) { |
Yinghai Lu | 223d96f | 2013-07-22 14:37:13 -0700 | [diff] [blame] | 1693 | *unassigned = true; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1694 | return 1; /* Return early from pci_walk_bus() */ |
Yinghai Lu | b07f2eb | 2012-02-23 19:23:32 -0800 | [diff] [blame] | 1695 | } |
| 1696 | } |
Yinghai Lu | 223d96f | 2013-07-22 14:37:13 -0700 | [diff] [blame] | 1697 | |
| 1698 | return 0; |
Yinghai Lu | b07f2eb | 2012-02-23 19:23:32 -0800 | [diff] [blame] | 1699 | } |
| 1700 | |
Yinghai Lu | ff35147 | 2013-07-24 15:37:13 -0600 | [diff] [blame] | 1701 | static enum enable_type pci_realloc_detect(struct pci_bus *bus, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1702 | enum enable_type enable_local) |
Yinghai Lu | 223d96f | 2013-07-22 14:37:13 -0700 | [diff] [blame] | 1703 | { |
| 1704 | bool unassigned = false; |
Benjamin Herrenschmidt | 7ac0d094 | 2019-06-15 10:23:58 +1000 | [diff] [blame] | 1705 | struct pci_host_bridge *host; |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1706 | |
Yinghai Lu | 967260c | 2013-07-22 14:37:15 -0700 | [diff] [blame] | 1707 | if (enable_local != undefined) |
| 1708 | return enable_local; |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1709 | |
Benjamin Herrenschmidt | 7ac0d094 | 2019-06-15 10:23:58 +1000 | [diff] [blame] | 1710 | host = pci_find_host_bridge(bus); |
| 1711 | if (host->preserve_config) |
| 1712 | return auto_disabled; |
| 1713 | |
Yinghai Lu | 967260c | 2013-07-22 14:37:15 -0700 | [diff] [blame] | 1714 | pci_walk_bus(bus, iov_resources_unassigned, &unassigned); |
| 1715 | if (unassigned) |
| 1716 | return auto_enabled; |
| 1717 | |
| 1718 | return enable_local; |
Yinghai Lu | 19aa7ee | 2012-01-21 02:08:24 -0800 | [diff] [blame] | 1719 | } |
Yinghai Lu | 223d96f | 2013-07-22 14:37:13 -0700 | [diff] [blame] | 1720 | #else |
Yinghai Lu | ff35147 | 2013-07-24 15:37:13 -0600 | [diff] [blame] | 1721 | static enum enable_type pci_realloc_detect(struct pci_bus *bus, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1722 | enum enable_type enable_local) |
Yinghai Lu | 967260c | 2013-07-22 14:37:15 -0700 | [diff] [blame] | 1723 | { |
| 1724 | return enable_local; |
| 1725 | } |
Yinghai Lu | 223d96f | 2013-07-22 14:37:13 -0700 | [diff] [blame] | 1726 | #endif |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1727 | |
| 1728 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1729 | * First try will not touch PCI bridge res. |
| 1730 | * Second and later try will clear small leaf bridge res. |
| 1731 | * Will stop till to the max depth if can not find good one. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | */ |
Yinghai Lu | 3977203 | 2013-07-22 14:37:18 -0700 | [diff] [blame] | 1733 | void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | { |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1735 | LIST_HEAD(realloc_head); |
| 1736 | /* List of resources that want additional resources */ |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1737 | struct list_head *add_list = NULL; |
| 1738 | int tried_times = 0; |
| 1739 | enum release_type rel_type = leaf_only; |
| 1740 | LIST_HEAD(fail_head); |
| 1741 | struct pci_dev_resource *fail_res; |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1742 | int pci_try_num = 1; |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1743 | enum enable_type enable_local; |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1744 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1745 | /* Don't realloc if asked to do so */ |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1746 | enable_local = pci_realloc_detect(bus, pci_realloc_enable); |
Yinghai Lu | 967260c | 2013-07-22 14:37:15 -0700 | [diff] [blame] | 1747 | if (pci_realloc_enabled(enable_local)) { |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1748 | int max_depth = pci_bus_get_depth(bus); |
Yinghai Lu | 19aa7ee | 2012-01-21 02:08:24 -0800 | [diff] [blame] | 1749 | |
| 1750 | pci_try_num = max_depth + 1; |
Mohan Kumar | 34c6b71 | 2019-04-20 07:07:20 +0300 | [diff] [blame] | 1751 | dev_info(&bus->dev, "max bus depth: %d pci_try_num: %d\n", |
| 1752 | max_depth, pci_try_num); |
Yinghai Lu | 19aa7ee | 2012-01-21 02:08:24 -0800 | [diff] [blame] | 1753 | } |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1754 | |
| 1755 | again: |
Yinghai Lu | 19aa7ee | 2012-01-21 02:08:24 -0800 | [diff] [blame] | 1756 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1757 | * Last try will use add_list, otherwise will try good to have as must |
| 1758 | * have, so can realloc parent bridge resource |
Yinghai Lu | 19aa7ee | 2012-01-21 02:08:24 -0800 | [diff] [blame] | 1759 | */ |
| 1760 | if (tried_times + 1 == pci_try_num) |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 1761 | add_list = &realloc_head; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1762 | /* |
| 1763 | * Depth first, calculate sizes and alignments of all subordinate buses. |
| 1764 | */ |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1765 | __pci_bus_size_bridges(bus, add_list); |
Ram Pai | c8adf9a | 2011-02-14 17:43:20 -0800 | [diff] [blame] | 1766 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | /* Depth last, allocate resources and update the hardware. */ |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1768 | __pci_bus_assign_resources(bus, add_list, &fail_head); |
Yinghai Lu | 19aa7ee | 2012-01-21 02:08:24 -0800 | [diff] [blame] | 1769 | if (add_list) |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 1770 | BUG_ON(!list_empty(add_list)); |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1771 | tried_times++; |
| 1772 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1773 | /* Any device complain? */ |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 1774 | if (list_empty(&fail_head)) |
Yinghai Lu | 928bea9 | 2013-07-22 14:37:17 -0700 | [diff] [blame] | 1775 | goto dump; |
Ram Pai | f483d39 | 2011-07-07 11:19:10 -0700 | [diff] [blame] | 1776 | |
Yinghai Lu | 0c5be0c | 2012-02-23 19:23:29 -0800 | [diff] [blame] | 1777 | if (tried_times >= pci_try_num) { |
Yinghai Lu | 967260c | 2013-07-22 14:37:15 -0700 | [diff] [blame] | 1778 | if (enable_local == undefined) |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1779 | dev_info(&bus->dev, "Some PCI device resources are unassigned, try booting with pci=realloc\n"); |
Yinghai Lu | 967260c | 2013-07-22 14:37:15 -0700 | [diff] [blame] | 1780 | else if (enable_local == auto_enabled) |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1781 | dev_info(&bus->dev, "Automatically enabled pci realloc, if you have problem, try booting with pci=realloc=off\n"); |
Yinghai Lu | eb572e7 | 2012-02-23 19:23:31 -0800 | [diff] [blame] | 1782 | |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 1783 | free_list(&fail_head); |
Yinghai Lu | 928bea9 | 2013-07-22 14:37:17 -0700 | [diff] [blame] | 1784 | goto dump; |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1785 | } |
| 1786 | |
Mohan Kumar | 34c6b71 | 2019-04-20 07:07:20 +0300 | [diff] [blame] | 1787 | dev_info(&bus->dev, "No. %d try to assign unassigned res\n", |
| 1788 | tried_times + 1); |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1789 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1790 | /* Third times and later will not check if it is leaf */ |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1791 | if ((tried_times + 1) > 2) |
| 1792 | rel_type = whole_subtree; |
| 1793 | |
| 1794 | /* |
| 1795 | * Try to release leaf bridge's resources that doesn't fit resource of |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1796 | * child device under that bridge. |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1797 | */ |
Yinghai Lu | 61e83cd | 2013-07-22 14:37:12 -0700 | [diff] [blame] | 1798 | list_for_each_entry(fail_res, &fail_head, list) |
| 1799 | pci_bus_release_bridge_resources(fail_res->dev->bus, |
Christian König | cb21bc9 | 2017-10-18 15:58:17 +0200 | [diff] [blame] | 1800 | fail_res->flags & PCI_RES_TYPE_MASK, |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 1801 | rel_type); |
Yinghai Lu | 61e83cd | 2013-07-22 14:37:12 -0700 | [diff] [blame] | 1802 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1803 | /* Restore size and flags */ |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 1804 | list_for_each_entry(fail_res, &fail_head, list) { |
| 1805 | struct resource *res = fail_res->res; |
Logan Gunthorpe | 9db8dc6 | 2020-01-08 14:32:08 -0700 | [diff] [blame] | 1806 | int idx; |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1807 | |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 1808 | res->start = fail_res->start; |
| 1809 | res->end = fail_res->end; |
| 1810 | res->flags = fail_res->flags; |
Logan Gunthorpe | 9db8dc6 | 2020-01-08 14:32:08 -0700 | [diff] [blame] | 1811 | |
| 1812 | if (pci_is_bridge(fail_res->dev)) { |
| 1813 | idx = res - &fail_res->dev->resource[0]; |
| 1814 | if (idx >= PCI_BRIDGE_RESOURCES && |
| 1815 | idx <= PCI_BRIDGE_RESOURCE_END) |
| 1816 | res->flags = 0; |
| 1817 | } |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1818 | } |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 1819 | free_list(&fail_head); |
Yinghai Lu | da7822e | 2011-05-12 17:11:37 -0700 | [diff] [blame] | 1820 | |
| 1821 | goto again; |
| 1822 | |
Yinghai Lu | 928bea9 | 2013-07-22 14:37:17 -0700 | [diff] [blame] | 1823 | dump: |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1824 | /* Dump the resource on buses */ |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1825 | pci_bus_dump_resources(bus); |
| 1826 | } |
| 1827 | |
| 1828 | void __init pci_assign_unassigned_resources(void) |
| 1829 | { |
| 1830 | struct pci_bus *root_bus; |
| 1831 | |
Rui Wang | 584c5c4 | 2016-08-17 16:00:34 +0800 | [diff] [blame] | 1832 | list_for_each_entry(root_bus, &pci_root_buses, node) { |
Yinghai Lu | 55ed83a | 2013-07-22 14:37:16 -0700 | [diff] [blame] | 1833 | pci_assign_unassigned_root_bus_resources(root_bus); |
Rui Wang | d9c149d | 2016-09-10 23:40:45 +0800 | [diff] [blame] | 1834 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1835 | /* Make sure the root bridge has a companion ACPI device */ |
Rui Wang | d9c149d | 2016-09-10 23:40:45 +0800 | [diff] [blame] | 1836 | if (ACPI_HANDLE(root_bus->bridge)) |
| 1837 | acpi_ioapic_add(ACPI_HANDLE(root_bus->bridge)); |
Rui Wang | 584c5c4 | 2016-08-17 16:00:34 +0800 | [diff] [blame] | 1838 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | } |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 1840 | |
Nicholas Johnson | 1e58f4e | 2020-01-06 15:47:26 +0000 | [diff] [blame] | 1841 | static void adjust_bridge_window(struct pci_dev *bridge, struct resource *res, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1842 | struct list_head *add_list, |
Nicholas Johnson | 3d264da | 2020-01-06 15:47:05 +0000 | [diff] [blame] | 1843 | resource_size_t new_size) |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1844 | { |
Nicholas Johnson | 9486757 | 2020-01-06 15:48:06 +0000 | [diff] [blame] | 1845 | resource_size_t add_size, size = resource_size(res); |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1846 | |
| 1847 | if (res->parent) |
| 1848 | return; |
| 1849 | |
Nicholas Johnson | 9486757 | 2020-01-06 15:48:06 +0000 | [diff] [blame] | 1850 | if (!new_size) |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1851 | return; |
| 1852 | |
Nicholas Johnson | 9486757 | 2020-01-06 15:48:06 +0000 | [diff] [blame] | 1853 | if (new_size > size) { |
| 1854 | add_size = new_size - size; |
| 1855 | pci_dbg(bridge, "bridge window %pR extended by %pa\n", res, |
| 1856 | &add_size); |
| 1857 | } else if (new_size < size) { |
| 1858 | add_size = size - new_size; |
| 1859 | pci_dbg(bridge, "bridge window %pR shrunken by %pa\n", res, |
| 1860 | &add_size); |
| 1861 | } |
| 1862 | |
Nicholas Johnson | ae4611f | 2020-01-06 15:47:46 +0000 | [diff] [blame] | 1863 | res->end = res->start + new_size - 1; |
| 1864 | remove_from_list(add_list, res); |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1865 | } |
| 1866 | |
| 1867 | static void pci_bus_distribute_available_resources(struct pci_bus *bus, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1868 | struct list_head *add_list, |
Nicholas Johnson | d555a50 | 2020-01-06 15:45:52 +0000 | [diff] [blame] | 1869 | struct resource io, |
| 1870 | struct resource mmio, |
| 1871 | struct resource mmio_pref) |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1872 | { |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1873 | unsigned int normal_bridges = 0, hotplug_bridges = 0; |
| 1874 | struct resource *io_res, *mmio_res, *mmio_pref_res; |
| 1875 | struct pci_dev *dev, *bridge = bus->self; |
Nicholas Johnson | f924c26 | 2020-01-06 15:46:13 +0000 | [diff] [blame] | 1876 | resource_size_t io_per_hp, mmio_per_hp, mmio_pref_per_hp, align; |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1877 | |
| 1878 | io_res = &bridge->resource[PCI_BRIDGE_RESOURCES + 0]; |
| 1879 | mmio_res = &bridge->resource[PCI_BRIDGE_RESOURCES + 1]; |
| 1880 | mmio_pref_res = &bridge->resource[PCI_BRIDGE_RESOURCES + 2]; |
| 1881 | |
| 1882 | /* |
Nicholas Johnson | f924c26 | 2020-01-06 15:46:13 +0000 | [diff] [blame] | 1883 | * The alignment of this bridge is yet to be considered, hence it must |
| 1884 | * be done now before extending its bridge window. |
| 1885 | */ |
| 1886 | align = pci_resource_alignment(bridge, io_res); |
| 1887 | if (!io_res->parent && align) |
| 1888 | io.start = min(ALIGN(io.start, align), io.end + 1); |
| 1889 | |
| 1890 | align = pci_resource_alignment(bridge, mmio_res); |
| 1891 | if (!mmio_res->parent && align) |
| 1892 | mmio.start = min(ALIGN(mmio.start, align), mmio.end + 1); |
| 1893 | |
| 1894 | align = pci_resource_alignment(bridge, mmio_pref_res); |
| 1895 | if (!mmio_pref_res->parent && align) |
| 1896 | mmio_pref.start = min(ALIGN(mmio_pref.start, align), |
| 1897 | mmio_pref.end + 1); |
| 1898 | |
| 1899 | /* |
Nicholas Johnson | ae4611f | 2020-01-06 15:47:46 +0000 | [diff] [blame] | 1900 | * Now that we have adjusted for alignment, update the bridge window |
| 1901 | * resources to fill as much remaining resource space as possible. |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1902 | */ |
Nicholas Johnson | 1e58f4e | 2020-01-06 15:47:26 +0000 | [diff] [blame] | 1903 | adjust_bridge_window(bridge, io_res, add_list, resource_size(&io)); |
| 1904 | adjust_bridge_window(bridge, mmio_res, add_list, resource_size(&mmio)); |
| 1905 | adjust_bridge_window(bridge, mmio_pref_res, add_list, |
Nicholas Johnson | 7779385 | 2020-01-28 15:57:09 -0600 | [diff] [blame] | 1906 | resource_size(&mmio_pref)); |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1907 | |
| 1908 | /* |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1909 | * Calculate how many hotplug bridges and normal bridges there |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 1910 | * are on this bus. We will distribute the additional available |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1911 | * resources between hotplug bridges. |
| 1912 | */ |
| 1913 | for_each_pci_bridge(dev, bus) { |
| 1914 | if (dev->is_hotplug_bridge) |
| 1915 | hotplug_bridges++; |
| 1916 | else |
| 1917 | normal_bridges++; |
| 1918 | } |
| 1919 | |
Nicholas Johnson | 5c6bcc3 | 2019-06-22 11:43:46 -0500 | [diff] [blame] | 1920 | /* |
| 1921 | * There is only one bridge on the bus so it gets all available |
| 1922 | * resources which it can then distribute to the possible hotplug |
| 1923 | * bridges below. |
| 1924 | */ |
| 1925 | if (hotplug_bridges + normal_bridges == 1) { |
| 1926 | dev = list_first_entry(&bus->devices, struct pci_dev, bus_list); |
Nicholas Johnson | 3d67a2d | 2020-01-06 15:45:32 +0000 | [diff] [blame] | 1927 | if (dev->subordinate) |
Nicholas Johnson | 5c6bcc3 | 2019-06-22 11:43:46 -0500 | [diff] [blame] | 1928 | pci_bus_distribute_available_resources(dev->subordinate, |
Nicholas Johnson | d555a50 | 2020-01-06 15:45:52 +0000 | [diff] [blame] | 1929 | add_list, io, mmio, mmio_pref); |
Nicholas Johnson | 5c6bcc3 | 2019-06-22 11:43:46 -0500 | [diff] [blame] | 1930 | return; |
| 1931 | } |
| 1932 | |
Nicholas Johnson | 6a381ea | 2019-06-22 12:13:50 -0500 | [diff] [blame] | 1933 | if (hotplug_bridges == 0) |
| 1934 | return; |
| 1935 | |
Nicholas Johnson | 5c6bcc3 | 2019-06-22 11:43:46 -0500 | [diff] [blame] | 1936 | /* |
| 1937 | * Calculate the total amount of extra resource space we can |
| 1938 | * pass to bridges below this one. This is basically the |
| 1939 | * extra space reduced by the minimal required space for the |
| 1940 | * non-hotplug bridges. |
| 1941 | */ |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1942 | for_each_pci_bridge(dev, bus) { |
Nicholas Johnson | f924c26 | 2020-01-06 15:46:13 +0000 | [diff] [blame] | 1943 | resource_size_t used_size; |
| 1944 | struct resource *res; |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1945 | |
| 1946 | if (dev->is_hotplug_bridge) |
| 1947 | continue; |
| 1948 | |
| 1949 | /* |
| 1950 | * Reduce the available resource space by what the |
| 1951 | * bridge and devices below it occupy. |
| 1952 | */ |
| 1953 | res = &dev->resource[PCI_BRIDGE_RESOURCES + 0]; |
Nicholas Johnson | f924c26 | 2020-01-06 15:46:13 +0000 | [diff] [blame] | 1954 | align = pci_resource_alignment(dev, res); |
| 1955 | align = align ? ALIGN(io.start, align) - io.start : 0; |
| 1956 | used_size = align + resource_size(res); |
| 1957 | if (!res->parent) |
| 1958 | io.start = min(io.start + used_size, io.end + 1); |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1959 | |
| 1960 | res = &dev->resource[PCI_BRIDGE_RESOURCES + 1]; |
Nicholas Johnson | f924c26 | 2020-01-06 15:46:13 +0000 | [diff] [blame] | 1961 | align = pci_resource_alignment(dev, res); |
| 1962 | align = align ? ALIGN(mmio.start, align) - mmio.start : 0; |
| 1963 | used_size = align + resource_size(res); |
| 1964 | if (!res->parent) |
| 1965 | mmio.start = min(mmio.start + used_size, mmio.end + 1); |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1966 | |
| 1967 | res = &dev->resource[PCI_BRIDGE_RESOURCES + 2]; |
Nicholas Johnson | f924c26 | 2020-01-06 15:46:13 +0000 | [diff] [blame] | 1968 | align = pci_resource_alignment(dev, res); |
| 1969 | align = align ? ALIGN(mmio_pref.start, align) - |
| 1970 | mmio_pref.start : 0; |
| 1971 | used_size = align + resource_size(res); |
| 1972 | if (!res->parent) |
| 1973 | mmio_pref.start = min(mmio_pref.start + used_size, |
| 1974 | mmio_pref.end + 1); |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1975 | } |
| 1976 | |
Nicholas Johnson | f924c26 | 2020-01-06 15:46:13 +0000 | [diff] [blame] | 1977 | io_per_hp = div64_ul(resource_size(&io), hotplug_bridges); |
| 1978 | mmio_per_hp = div64_ul(resource_size(&mmio), hotplug_bridges); |
| 1979 | mmio_pref_per_hp = div64_ul(resource_size(&mmio_pref), |
| 1980 | hotplug_bridges); |
| 1981 | |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1982 | /* |
| 1983 | * Go over devices on this bus and distribute the remaining |
| 1984 | * resource space between hotplug bridges. |
| 1985 | */ |
| 1986 | for_each_pci_bridge(dev, bus) { |
| 1987 | struct pci_bus *b; |
| 1988 | |
| 1989 | b = dev->subordinate; |
Mika Westerberg | 14fe595 | 2018-05-28 15:47:55 +0300 | [diff] [blame] | 1990 | if (!b || !dev->is_hotplug_bridge) |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 1991 | continue; |
| 1992 | |
Mika Westerberg | 14fe595 | 2018-05-28 15:47:55 +0300 | [diff] [blame] | 1993 | /* |
| 1994 | * Distribute available extra resources equally between |
| 1995 | * hotplug-capable downstream ports taking alignment into |
| 1996 | * account. |
Mika Westerberg | 14fe595 | 2018-05-28 15:47:55 +0300 | [diff] [blame] | 1997 | */ |
Nicholas Johnson | d555a50 | 2020-01-06 15:45:52 +0000 | [diff] [blame] | 1998 | io.end = io.start + io_per_hp - 1; |
| 1999 | mmio.end = mmio.start + mmio_per_hp - 1; |
| 2000 | mmio_pref.end = mmio_pref.start + mmio_pref_per_hp - 1; |
| 2001 | |
| 2002 | pci_bus_distribute_available_resources(b, add_list, io, mmio, |
| 2003 | mmio_pref); |
Nicholas Johnson | f924c26 | 2020-01-06 15:46:13 +0000 | [diff] [blame] | 2004 | |
| 2005 | io.start += io_per_hp; |
| 2006 | mmio.start += mmio_per_hp; |
| 2007 | mmio_pref.start += mmio_pref_per_hp; |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 2008 | } |
| 2009 | } |
| 2010 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2011 | static void pci_bridge_distribute_available_resources(struct pci_dev *bridge, |
| 2012 | struct list_head *add_list) |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 2013 | { |
Nicholas Johnson | d555a50 | 2020-01-06 15:45:52 +0000 | [diff] [blame] | 2014 | struct resource available_io, available_mmio, available_mmio_pref; |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 2015 | |
| 2016 | if (!bridge->is_hotplug_bridge) |
| 2017 | return; |
| 2018 | |
| 2019 | /* Take the initial extra resources from the hotplug port */ |
Nicholas Johnson | d555a50 | 2020-01-06 15:45:52 +0000 | [diff] [blame] | 2020 | available_io = bridge->resource[PCI_BRIDGE_RESOURCES + 0]; |
| 2021 | available_mmio = bridge->resource[PCI_BRIDGE_RESOURCES + 1]; |
| 2022 | available_mmio_pref = bridge->resource[PCI_BRIDGE_RESOURCES + 2]; |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 2023 | |
| 2024 | pci_bus_distribute_available_resources(bridge->subordinate, |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2025 | add_list, available_io, |
| 2026 | available_mmio, |
| 2027 | available_mmio_pref); |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 2028 | } |
| 2029 | |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 2030 | void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) |
| 2031 | { |
| 2032 | struct pci_bus *parent = bridge->subordinate; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2033 | /* List of resources that want additional resources */ |
| 2034 | LIST_HEAD(add_list); |
| 2035 | |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2036 | int tried_times = 0; |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 2037 | LIST_HEAD(fail_head); |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 2038 | struct pci_dev_resource *fail_res; |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 2039 | int retval; |
| 2040 | |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2041 | again: |
Yinghai Lu | 8424d75 | 2012-01-21 02:08:21 -0800 | [diff] [blame] | 2042 | __pci_bus_size_bridges(parent, &add_list); |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 2043 | |
| 2044 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2045 | * Distribute remaining resources (if any) equally between hotplug |
| 2046 | * bridges below. This makes it possible to extend the hierarchy |
| 2047 | * later without running out of resources. |
Mika Westerberg | 1a57677 | 2017-10-13 21:35:45 +0300 | [diff] [blame] | 2048 | */ |
| 2049 | pci_bridge_distribute_available_resources(bridge, &add_list); |
| 2050 | |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 2051 | __pci_bridge_assign_resources(bridge, &add_list, &fail_head); |
| 2052 | BUG_ON(!list_empty(&add_list)); |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2053 | tried_times++; |
| 2054 | |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 2055 | if (list_empty(&fail_head)) |
Yinghai Lu | 3f579c3 | 2010-05-21 14:35:06 -0700 | [diff] [blame] | 2056 | goto enable_all; |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2057 | |
| 2058 | if (tried_times >= 2) { |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2059 | /* Still fail, don't need to try more */ |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 2060 | free_list(&fail_head); |
Yinghai Lu | 3f579c3 | 2010-05-21 14:35:06 -0700 | [diff] [blame] | 2061 | goto enable_all; |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2062 | } |
| 2063 | |
| 2064 | printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", |
| 2065 | tried_times + 1); |
| 2066 | |
| 2067 | /* |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2068 | * Try to release leaf bridge's resources that aren't big enough |
| 2069 | * to contain child device resources. |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2070 | */ |
Yinghai Lu | 61e83cd | 2013-07-22 14:37:12 -0700 | [diff] [blame] | 2071 | list_for_each_entry(fail_res, &fail_head, list) |
| 2072 | pci_bus_release_bridge_resources(fail_res->dev->bus, |
Christian König | cb21bc9 | 2017-10-18 15:58:17 +0200 | [diff] [blame] | 2073 | fail_res->flags & PCI_RES_TYPE_MASK, |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2074 | whole_subtree); |
Yinghai Lu | 61e83cd | 2013-07-22 14:37:12 -0700 | [diff] [blame] | 2075 | |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2076 | /* Restore size and flags */ |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 2077 | list_for_each_entry(fail_res, &fail_head, list) { |
| 2078 | struct resource *res = fail_res->res; |
Logan Gunthorpe | 9db8dc6 | 2020-01-08 14:32:08 -0700 | [diff] [blame] | 2079 | int idx; |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2080 | |
Yinghai Lu | b9b0bba | 2012-01-21 02:08:29 -0800 | [diff] [blame] | 2081 | res->start = fail_res->start; |
| 2082 | res->end = fail_res->end; |
| 2083 | res->flags = fail_res->flags; |
Logan Gunthorpe | 9db8dc6 | 2020-01-08 14:32:08 -0700 | [diff] [blame] | 2084 | |
| 2085 | if (pci_is_bridge(fail_res->dev)) { |
| 2086 | idx = res - &fail_res->dev->resource[0]; |
| 2087 | if (idx >= PCI_BRIDGE_RESOURCES && |
| 2088 | idx <= PCI_BRIDGE_RESOURCE_END) |
| 2089 | res->flags = 0; |
| 2090 | } |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2091 | } |
Yinghai Lu | bffc56d | 2012-01-21 02:08:30 -0800 | [diff] [blame] | 2092 | free_list(&fail_head); |
Yinghai Lu | 32180e4 | 2010-01-22 01:02:27 -0800 | [diff] [blame] | 2093 | |
| 2094 | goto again; |
Yinghai Lu | 3f579c3 | 2010-05-21 14:35:06 -0700 | [diff] [blame] | 2095 | |
| 2096 | enable_all: |
| 2097 | retval = pci_reenable_device(bridge); |
Bjorn Helgaas | 9fc9eea | 2013-04-12 11:35:40 -0600 | [diff] [blame] | 2098 | if (retval) |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 2099 | pci_err(bridge, "Error reenabling bridge (%d)\n", retval); |
Yinghai Lu | 3f579c3 | 2010-05-21 14:35:06 -0700 | [diff] [blame] | 2100 | pci_set_master(bridge); |
Yinghai Lu | 6841ec6 | 2010-01-22 01:02:25 -0800 | [diff] [blame] | 2101 | } |
| 2102 | EXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); |
Yinghai Lu | 9b03088 | 2012-01-21 02:08:23 -0800 | [diff] [blame] | 2103 | |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2104 | int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type) |
| 2105 | { |
| 2106 | struct pci_dev_resource *dev_res; |
| 2107 | struct pci_dev *next; |
| 2108 | LIST_HEAD(saved); |
| 2109 | LIST_HEAD(added); |
| 2110 | LIST_HEAD(failed); |
| 2111 | unsigned int i; |
| 2112 | int ret; |
| 2113 | |
Benjamin Herrenschmidt | fb794a7 | 2019-09-25 11:16:55 +1000 | [diff] [blame] | 2114 | down_read(&pci_bus_sem); |
| 2115 | |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2116 | /* Walk to the root hub, releasing bridge BARs when possible */ |
| 2117 | next = bridge; |
| 2118 | do { |
| 2119 | bridge = next; |
| 2120 | for (i = PCI_BRIDGE_RESOURCES; i < PCI_BRIDGE_RESOURCE_END; |
| 2121 | i++) { |
| 2122 | struct resource *res = &bridge->resource[i]; |
| 2123 | |
| 2124 | if ((res->flags ^ type) & PCI_RES_TYPE_MASK) |
| 2125 | continue; |
| 2126 | |
| 2127 | /* Ignore BARs which are still in use */ |
| 2128 | if (res->child) |
| 2129 | continue; |
| 2130 | |
| 2131 | ret = add_to_list(&saved, bridge, res, 0, 0); |
| 2132 | if (ret) |
| 2133 | goto cleanup; |
| 2134 | |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 2135 | pci_info(bridge, "BAR %d: releasing %pR\n", |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2136 | i, res); |
| 2137 | |
| 2138 | if (res->parent) |
| 2139 | release_resource(res); |
| 2140 | res->start = 0; |
| 2141 | res->end = 0; |
| 2142 | break; |
| 2143 | } |
| 2144 | if (i == PCI_BRIDGE_RESOURCE_END) |
| 2145 | break; |
| 2146 | |
| 2147 | next = bridge->bus ? bridge->bus->self : NULL; |
| 2148 | } while (next); |
| 2149 | |
Benjamin Herrenschmidt | fb794a7 | 2019-09-25 11:16:55 +1000 | [diff] [blame] | 2150 | if (list_empty(&saved)) { |
| 2151 | up_read(&pci_bus_sem); |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2152 | return -ENOENT; |
Benjamin Herrenschmidt | fb794a7 | 2019-09-25 11:16:55 +1000 | [diff] [blame] | 2153 | } |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2154 | |
| 2155 | __pci_bus_size_bridges(bridge->subordinate, &added); |
| 2156 | __pci_bridge_assign_resources(bridge, &added, &failed); |
| 2157 | BUG_ON(!list_empty(&added)); |
| 2158 | |
| 2159 | if (!list_empty(&failed)) { |
| 2160 | ret = -ENOSPC; |
| 2161 | goto cleanup; |
| 2162 | } |
| 2163 | |
| 2164 | list_for_each_entry(dev_res, &saved, list) { |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2165 | /* Skip the bridge we just assigned resources for */ |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2166 | if (bridge == dev_res->dev) |
| 2167 | continue; |
| 2168 | |
| 2169 | bridge = dev_res->dev; |
| 2170 | pci_setup_bridge(bridge->subordinate); |
| 2171 | } |
| 2172 | |
| 2173 | free_list(&saved); |
Benjamin Herrenschmidt | fb794a7 | 2019-09-25 11:16:55 +1000 | [diff] [blame] | 2174 | up_read(&pci_bus_sem); |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2175 | return 0; |
| 2176 | |
| 2177 | cleanup: |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2178 | /* Restore size and flags */ |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2179 | list_for_each_entry(dev_res, &failed, list) { |
| 2180 | struct resource *res = dev_res->res; |
| 2181 | |
| 2182 | res->start = dev_res->start; |
| 2183 | res->end = dev_res->end; |
| 2184 | res->flags = dev_res->flags; |
| 2185 | } |
| 2186 | free_list(&failed); |
| 2187 | |
| 2188 | /* Revert to the old configuration */ |
| 2189 | list_for_each_entry(dev_res, &saved, list) { |
| 2190 | struct resource *res = dev_res->res; |
| 2191 | |
| 2192 | bridge = dev_res->dev; |
| 2193 | i = res - bridge->resource; |
| 2194 | |
| 2195 | res->start = dev_res->start; |
| 2196 | res->end = dev_res->end; |
| 2197 | res->flags = dev_res->flags; |
| 2198 | |
| 2199 | pci_claim_resource(bridge, i); |
| 2200 | pci_setup_bridge(bridge->subordinate); |
| 2201 | } |
| 2202 | free_list(&saved); |
Benjamin Herrenschmidt | fb794a7 | 2019-09-25 11:16:55 +1000 | [diff] [blame] | 2203 | up_read(&pci_bus_sem); |
Christian König | 8bb705e | 2017-10-24 14:40:26 -0500 | [diff] [blame] | 2204 | |
| 2205 | return ret; |
| 2206 | } |
| 2207 | |
Yinghai Lu | 1778794 | 2012-10-30 14:31:10 -0600 | [diff] [blame] | 2208 | void pci_assign_unassigned_bus_resources(struct pci_bus *bus) |
Yinghai Lu | 9b03088 | 2012-01-21 02:08:23 -0800 | [diff] [blame] | 2209 | { |
Yinghai Lu | 9b03088 | 2012-01-21 02:08:23 -0800 | [diff] [blame] | 2210 | struct pci_dev *dev; |
Nicholas Johnson | 0d60761 | 2019-05-07 14:51:24 -0500 | [diff] [blame] | 2211 | /* List of resources that want additional resources */ |
| 2212 | LIST_HEAD(add_list); |
Yinghai Lu | 9b03088 | 2012-01-21 02:08:23 -0800 | [diff] [blame] | 2213 | |
Yinghai Lu | 9b03088 | 2012-01-21 02:08:23 -0800 | [diff] [blame] | 2214 | down_read(&pci_bus_sem); |
Andy Shevchenko | 24a0c65 | 2017-10-20 15:38:54 -0500 | [diff] [blame] | 2215 | for_each_pci_bridge(dev, bus) |
| 2216 | if (pci_has_subordinate(dev)) |
| 2217 | __pci_bus_size_bridges(dev->subordinate, &add_list); |
Yinghai Lu | 9b03088 | 2012-01-21 02:08:23 -0800 | [diff] [blame] | 2218 | up_read(&pci_bus_sem); |
| 2219 | __pci_bus_assign_resources(bus, &add_list, NULL); |
Yinghai Lu | bdc4abe | 2012-01-21 02:08:27 -0800 | [diff] [blame] | 2220 | BUG_ON(!list_empty(&add_list)); |
Yinghai Lu | 1778794 | 2012-10-30 14:31:10 -0600 | [diff] [blame] | 2221 | } |
Ray Jui | e6b29de | 2015-04-08 11:21:33 -0700 | [diff] [blame] | 2222 | EXPORT_SYMBOL_GPL(pci_assign_unassigned_bus_resources); |