Blame view
drivers/pci/bus.c
7.16 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
/* * drivers/pci/bus.c * * From setup-res.c, by: * Dave Rusling (david.rusling@reo.mts.dec.com) * David Mosberger (davidm@cs.arizona.edu) * David Miller (davem@redhat.com) * Ivan Kokshaysky (ink@jurassic.park.msu.ru) */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/errno.h> #include <linux/ioport.h> #include <linux/proc_fs.h> #include <linux/init.h> |
5a0e3ad6a include cleanup: ... |
17 |
#include <linux/slab.h> |
1da177e4c Linux-2.6.12-rc2 |
18 19 |
#include "pci.h" |
2fe2abf89 PCI: augment bus ... |
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 |
void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags) { struct pci_bus_resource *bus_res; bus_res = kzalloc(sizeof(struct pci_bus_resource), GFP_KERNEL); if (!bus_res) { dev_err(&bus->dev, "can't add %pR resource ", res); return; } bus_res->res = res; bus_res->flags = flags; list_add_tail(&bus_res->list, &bus->resources); } struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n) { struct pci_bus_resource *bus_res; if (n < PCI_BRIDGE_RESOURCE_NUM) return bus->resource[n]; n -= PCI_BRIDGE_RESOURCE_NUM; list_for_each_entry(bus_res, &bus->resources, list) { if (n-- == 0) return bus_res->res; } return NULL; } EXPORT_SYMBOL_GPL(pci_bus_resource_n); void pci_bus_remove_resources(struct pci_bus *bus) { struct pci_bus_resource *bus_res, *tmp; int i; for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) |
7736a05a3 PCI: sparse warni... |
59 |
bus->resource[i] = NULL; |
2fe2abf89 PCI: augment bus ... |
60 61 62 63 64 65 |
list_for_each_entry_safe(bus_res, tmp, &bus->resources, list) { list_del(&bus_res->list); kfree(bus_res); } } |
1da177e4c Linux-2.6.12-rc2 |
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 |
/** * pci_bus_alloc_resource - allocate a resource from a parent bus * @bus: PCI bus * @res: resource to allocate * @size: size of resource to allocate * @align: alignment of resource to allocate * @min: minimum /proc/iomem address to allocate * @type_mask: IORESOURCE_* type flags * @alignf: resource alignment function * @alignf_data: data argument for resource alignment function * * Given the PCI bus a device resides on, the size, minimum address, * alignment and type, try to find an acceptable resource allocation * for a specific device resource. */ int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, |
e31dd6e45 [PATCH] 64bit res... |
83 84 |
resource_size_t size, resource_size_t align, resource_size_t min, unsigned int type_mask, |
b26b2d494 resource/PCI: ali... |
85 |
resource_size_t (*alignf)(void *, |
3b7a17fcd resource/PCI: mar... |
86 |
const struct resource *, |
b26b2d494 resource/PCI: ali... |
87 88 |
resource_size_t, resource_size_t), |
e31dd6e45 [PATCH] 64bit res... |
89 |
void *alignf_data) |
1da177e4c Linux-2.6.12-rc2 |
90 |
{ |
6db45b76e Revert "PCI: allo... |
91 |
int i, ret = -ENOMEM; |
89a74eccc PCI: add pci_bus_... |
92 |
struct resource *r; |
1f82de10d PCI/x86: don't as... |
93 |
resource_size_t max = -1; |
1da177e4c Linux-2.6.12-rc2 |
94 95 |
type_mask |= IORESOURCE_IO | IORESOURCE_MEM; |
1f82de10d PCI/x86: don't as... |
96 97 98 |
/* don't allocate too high if the pref mem doesn't support 64bit*/ if (!(res->flags & IORESOURCE_MEM_64)) max = PCIBIOS_MAX_MEM_32; |
6db45b76e Revert "PCI: allo... |
99 100 101 |
pci_bus_for_each_resource(bus, r, i) { if (!r) continue; |
1da177e4c Linux-2.6.12-rc2 |
102 103 104 105 106 107 108 109 110 111 112 |
/* type_mask must match */ if ((res->flags ^ r->flags) & type_mask) continue; /* We cannot allocate a non-prefetching resource from a pre-fetching area */ if ((r->flags & IORESOURCE_PREFETCH) && !(res->flags & IORESOURCE_PREFETCH)) continue; /* Ok, try it out.. */ |
688d19182 pci: make bus res... |
113 114 |
ret = allocate_resource(r, res, size, r->start ? : min, |
1f82de10d PCI/x86: don't as... |
115 |
max, align, |
1da177e4c Linux-2.6.12-rc2 |
116 117 118 119 120 121 122 123 |
alignf, alignf_data); if (ret == 0) break; } return ret; } /** |
3fa16fdb4 PCI: cleanup pci_... |
124 |
* pci_bus_add_device - add a single device |
1da177e4c Linux-2.6.12-rc2 |
125 126 127 128 129 |
* @dev: device to add * * This adds a single pci device to the global * device list and adds sysfs and procfs entries */ |
96bde06a2 pci: do not mark ... |
130 |
int pci_bus_add_device(struct pci_dev *dev) |
1da177e4c Linux-2.6.12-rc2 |
131 |
{ |
b19441af1 PCI: fix __must_c... |
132 133 134 135 |
int retval; retval = device_add(&dev->dev); if (retval) return retval; |
1da177e4c Linux-2.6.12-rc2 |
136 |
|
8a1bc9013 PCI: add is_added... |
137 |
dev->is_added = 1; |
1da177e4c Linux-2.6.12-rc2 |
138 139 |
pci_proc_attach_device(dev); pci_create_sysfs_dev_files(dev); |
b19441af1 PCI: fix __must_c... |
140 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
141 142 143 |
} /** |
876e501ab PCI: factor pci_b... |
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 |
* pci_bus_add_child - add a child bus * @bus: bus to add * * This adds sysfs entries for a single bus */ int pci_bus_add_child(struct pci_bus *bus) { int retval; if (bus->bridge) bus->dev.parent = bus->bridge; retval = device_register(&bus->dev); if (retval) return retval; bus->is_added = 1; |
876e501ab PCI: factor pci_b... |
161 162 163 164 165 166 167 |
/* Create legacy_io and legacy_mem files for this bus */ pci_create_legacy_files(bus); return retval; } /** |
1da177e4c Linux-2.6.12-rc2 |
168 169 170 171 172 173 174 175 176 177 178 |
* pci_bus_add_devices - insert newly discovered PCI devices * @bus: bus to check for new devices * * Add newly discovered PCI devices (which are on the bus->devices * list) to the global PCI device list, add the sysfs and procfs * entries. Where a bridge is found, add the discovered bus to * the parents list of child buses, and recurse (breadth-first * to be compatible with 2.4) * * Call hotplug for each new devices. */ |
c48f1670f PCI: constify pci... |
179 |
void pci_bus_add_devices(const struct pci_bus *bus) |
1da177e4c Linux-2.6.12-rc2 |
180 181 |
{ struct pci_dev *dev; |
3fa16fdb4 PCI: cleanup pci_... |
182 |
struct pci_bus *child; |
b19441af1 PCI: fix __must_c... |
183 |
int retval; |
1da177e4c Linux-2.6.12-rc2 |
184 185 |
list_for_each_entry(dev, &bus->devices, bus_list) { |
8a1bc9013 PCI: add is_added... |
186 187 |
/* Skip already-added devices */ if (dev->is_added) |
1da177e4c Linux-2.6.12-rc2 |
188 |
continue; |
b19441af1 PCI: fix __must_c... |
189 190 191 192 |
retval = pci_bus_add_device(dev); if (retval) dev_err(&dev->dev, "Error adding device, continuing "); |
1da177e4c Linux-2.6.12-rc2 |
193 194 195 |
} list_for_each_entry(dev, &bus->devices, bus_list) { |
8a1bc9013 PCI: add is_added... |
196 |
BUG_ON(!dev->is_added); |
1da177e4c Linux-2.6.12-rc2 |
197 |
|
3fa16fdb4 PCI: cleanup pci_... |
198 |
child = dev->subordinate; |
1da177e4c Linux-2.6.12-rc2 |
199 200 201 202 |
/* * If there is an unattached subordinate bus, attach * it and then scan for unattached PCI devices. */ |
3fa16fdb4 PCI: cleanup pci_... |
203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 |
if (!child) continue; if (list_empty(&child->node)) { down_write(&pci_bus_sem); list_add_tail(&child->node, &dev->bus->children); up_write(&pci_bus_sem); } pci_bus_add_devices(child); /* * register the bus with sysfs as the parent is now * properly registered. */ if (child->is_added) continue; |
876e501ab PCI: factor pci_b... |
218 |
retval = pci_bus_add_child(child); |
3fa16fdb4 PCI: cleanup pci_... |
219 |
if (retval) |
876e501ab PCI: factor pci_b... |
220 221 |
dev_err(&dev->dev, "Error adding bus, continuing "); |
1da177e4c Linux-2.6.12-rc2 |
222 223 224 225 226 227 |
} } void pci_enable_bridges(struct pci_bus *bus) { struct pci_dev *dev; |
95a629657 [PATCH] PCI: star... |
228 |
int retval; |
1da177e4c Linux-2.6.12-rc2 |
229 230 231 |
list_for_each_entry(dev, &bus->devices, bus_list) { if (dev->subordinate) { |
296ccb086 PCI: Setup disabl... |
232 |
if (!pci_is_enabled(dev)) { |
9dd90cafa PCI: do not enabl... |
233 |
retval = pci_enable_device(dev); |
2eb5ebd36 PCI: check return... |
234 235 236 |
if (retval) dev_err(&dev->dev, "Error enabling bridge (%d), continuing ", retval); |
9dd90cafa PCI: do not enabl... |
237 238 |
pci_set_master(dev); } |
1da177e4c Linux-2.6.12-rc2 |
239 240 241 242 |
pci_enable_bridges(dev->subordinate); } } } |
cecf4864c [PATCH] PCI: Add ... |
243 244 245 246 247 248 249 250 |
/** pci_walk_bus - walk devices on/under bus, calling callback. * @top bus whose devices should be walked * @cb callback to be called for each device found * @userdata arbitrary pointer to be passed to callback. * * Walk the given bus, including any bridged devices * on buses under this bus. Call the provided callback * on each device found. |
70298c6e6 PCI AER: support ... |
251 252 253 254 |
* * We check the return of @cb each time. If it returns anything * other than 0, we break out. * |
cecf4864c [PATCH] PCI: Add ... |
255 |
*/ |
70298c6e6 PCI AER: support ... |
256 |
void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *), |
cecf4864c [PATCH] PCI: Add ... |
257 258 259 260 261 |
void *userdata) { struct pci_dev *dev; struct pci_bus *bus; struct list_head *next; |
70298c6e6 PCI AER: support ... |
262 |
int retval; |
cecf4864c [PATCH] PCI: Add ... |
263 264 |
bus = top; |
d71374daf [PATCH] PCI: fix ... |
265 |
down_read(&pci_bus_sem); |
cecf4864c [PATCH] PCI: Add ... |
266 267 268 269 270 271 272 273 274 275 276 |
next = top->devices.next; for (;;) { if (next == &bus->devices) { /* end of this bus, go up or finish */ if (bus == top) break; next = bus->self->bus_list.next; bus = bus->self->bus; continue; } dev = list_entry(next, struct pci_dev, bus_list); |
cecf4864c [PATCH] PCI: Add ... |
277 278 279 280 281 282 |
if (dev->subordinate) { /* this is a pci-pci bridge, do its devices next */ next = dev->subordinate->devices.next; bus = dev->subordinate; } else next = dev->bus_list.next; |
cecf4864c [PATCH] PCI: Add ... |
283 |
|
d71374daf [PATCH] PCI: fix ... |
284 |
/* Run device routines with the device locked */ |
8e9394ce2 Driver core: crea... |
285 |
device_lock(&dev->dev); |
70298c6e6 PCI AER: support ... |
286 |
retval = cb(dev, userdata); |
8e9394ce2 Driver core: crea... |
287 |
device_unlock(&dev->dev); |
70298c6e6 PCI AER: support ... |
288 289 |
if (retval) break; |
cecf4864c [PATCH] PCI: Add ... |
290 |
} |
d71374daf [PATCH] PCI: fix ... |
291 |
up_read(&pci_bus_sem); |
cecf4864c [PATCH] PCI: Add ... |
292 |
} |
7c94def89 x86/PCI: Export p... |
293 |
EXPORT_SYMBOL_GPL(pci_walk_bus); |
cecf4864c [PATCH] PCI: Add ... |
294 |
|
1da177e4c Linux-2.6.12-rc2 |
295 296 297 298 |
EXPORT_SYMBOL(pci_bus_alloc_resource); EXPORT_SYMBOL_GPL(pci_bus_add_device); EXPORT_SYMBOL(pci_bus_add_devices); EXPORT_SYMBOL(pci_enable_bridges); |