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authorIvan Kokshaysky <ink@jurassic.park.msu.ru>2005-08-30 10:48:52 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-30 14:14:48 -0400
commit81d4af1340badcd2100c84fbd1bfd13156de41aa (patch)
tree67b7302a238eb930c7416d00b3a316def6396b3d /arch/i386/pci/i386.c
parentae11be6f37dfa140b6c2d1a53b307ef57da69a04 (diff)
[PATCH] x86: pci_assign_unassigned_resources() update
I had some time to think about PCI assign issues in 2.6.13-rc series. The major problem here is that we call pci_assign_unassigned_resources() way too early - at subsys_initcall level. Therefore we give no chances to ACPI and PnP routines (called at fs_initcall level) to reserve their respective resources properly, as the comments in drivers/pnp/system.c and drivers/acpi/motherboard.c suggest: /** * Reserve motherboard resources after PCI claim BARs, * but before PCI assign resources for uninitialized PCI devices */ So I moved the pci_assign_unassigned_resources() call to pcibios_assign_resources() (fs_initcall), which should hopefully fix a lot of problems and make PCIBIOS_MIN_IO tweaks unnecessary. Other changes: - remove resource assignment code from pcibios_assign_resources(), since it duplicates pci_assign_unassigned_resources() functionality and actually does nothing in 2.6.13; - modify ROM assignment code as per Ben's suggestion: try to use firmware settings by default (if PCI_ASSIGN_ROMS is not set); - set CARDBUS_IO_SIZE back to 4K as it's a wonderful stress test for various setups. Confirmed by Tero Roponen <teanropo@cc.jyu.fi> (who had problems with the 4kB CardBus IO size previously). Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/pci/i386.c')
-rw-r--r--arch/i386/pci/i386.c49
1 files changed, 16 insertions, 33 deletions
diff --git a/arch/i386/pci/i386.c b/arch/i386/pci/i386.c
index 93a364c82150..3cc480998a47 100644
--- a/arch/i386/pci/i386.c
+++ b/arch/i386/pci/i386.c
@@ -170,43 +170,26 @@ static void __init pcibios_allocate_resources(int pass)
170static int __init pcibios_assign_resources(void) 170static int __init pcibios_assign_resources(void)
171{ 171{
172 struct pci_dev *dev = NULL; 172 struct pci_dev *dev = NULL;
173 int idx; 173 struct resource *r, *pr;
174 struct resource *r;
175
176 for_each_pci_dev(dev) {
177 int class = dev->class >> 8;
178
179 /* Don't touch classless devices and host bridges */
180 if (!class || class == PCI_CLASS_BRIDGE_HOST)
181 continue;
182
183 for(idx=0; idx<6; idx++) {
184 r = &dev->resource[idx];
185
186 /*
187 * Don't touch IDE controllers and I/O ports of video cards!
188 */
189 if ((class == PCI_CLASS_STORAGE_IDE && idx < 4) ||
190 (class == PCI_CLASS_DISPLAY_VGA && (r->flags & IORESOURCE_IO)))
191 continue;
192
193 /*
194 * We shall assign a new address to this resource, either because
195 * the BIOS forgot to do so or because we have decided the old
196 * address was unusable for some reason.
197 */
198 if (!r->start && r->end)
199 pci_assign_resource(dev, idx);
200 }
201 174
202 if (pci_probe & PCI_ASSIGN_ROMS) { 175 if (!(pci_probe & PCI_ASSIGN_ROMS)) {
176 /* Try to use BIOS settings for ROMs, otherwise let
177 pci_assign_unassigned_resources() allocate the new
178 addresses. */
179 for_each_pci_dev(dev) {
203 r = &dev->resource[PCI_ROM_RESOURCE]; 180 r = &dev->resource[PCI_ROM_RESOURCE];
204 r->end -= r->start; 181 if (!r->flags || !r->start)
205 r->start = 0; 182 continue;
206 if (r->end) 183 pr = pci_find_parent_resource(dev, r);
207 pci_assign_resource(dev, PCI_ROM_RESOURCE); 184 if (!pr || request_resource(pr, r) < 0) {
185 r->end -= r->start;
186 r->start = 0;
187 }
208 } 188 }
209 } 189 }
190
191 pci_assign_unassigned_resources();
192
210 return 0; 193 return 0;
211} 194}
212 195