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PCI: Call pci_read_bridge_bases() from core instead of arch code

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When we scan a PCI bus, we read PCI-PCI bridge window registers with
pci_read_bridge_bases() so we can validate the resource hierarchy.  Most
architectures call pci_read_bridge_bases() from pcibios_fixup_bus(), but
PCI-PCI bridges are not arch-specific, so this doesn't need to be in
arch-specific code.

Call pci_read_bridge_bases() directly from the PCI core instead of from
arch code.

For alpha and mips, we now call pci_read_bridge_bases() always; previously
we only called it if PCI_PROBE_ONLY was set.

[bhelgaas: changelog]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: James E.J. Bottomley <jejb@parisc-linux.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Bjorn Helgaas <bhelgaas@google.com>
CC: Richard Henderson <rth@twiddle.net>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: David Howells <dhowells@redhat.com>
CC: Russell King <linux@arm.linux.org.uk>
CC: Tony Luck <tony.luck@intel.com>
CC: David S. Miller <davem@davemloft.net>
CC: Ingo Molnar <mingo@redhat.com>
CC: Guenter Roeck <linux@roeck-us.net>
CC: Michal Simek <monstr@monstr.eu>
CC: Chris Zankel <chris@zankel.net>
This commit is contained in:
Lorenzo Pieralisi 2015-07-09 11:59:16 +01:00 committed by Bjorn Helgaas
parent bc0195aad0
commit dff22d2054
12 changed files with 11 additions and 42 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

7
arch/alpha/kernel/pci.c
View file

@ -242,12 +242,7 @@ pci_restore_srm_config(void)
void pcibios_fixup_bus(struct pci_bus *bus)
{
struct pci_dev *dev = bus->self;
if (pci_has_flag(PCI_PROBE_ONLY) && dev &&
(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
pci_read_bridge_bases(bus);
}
struct pci_dev *dev;
list_for_each_entry(dev, &bus->devices, bus_list) {
pdev_save_srm_config(dev);

2
arch/frv/mb93090-mb00/pci-vdk.c
View file

@ -294,8 +294,6 @@ void pcibios_fixup_bus(struct pci_bus *bus)
printk("### PCIBIOS_FIXUP_BUS(%d)\n",bus->number);
#endif
pci_read_bridge_bases(bus);
if (bus->number == 0) {
struct pci_dev *dev;
list_for_each_entry(dev, &bus->devices, bus_list) {

5
arch/ia64/pci/pci.c
View file

@ -533,10 +533,9 @@ void pcibios_fixup_bus(struct pci_bus *b)
{
struct pci_dev *dev;
if (b->self) {
pci_read_bridge_bases(b);
if (b->self)
pcibios_fixup_bridge_resources(b->self);
}
list_for_each_entry(dev, &b->devices, bus_list)
pcibios_fixup_device_resources(dev);
platform_pci_fixup_bus(b);

9
arch/microblaze/pci/pci-common.c
View file

@ -863,14 +863,7 @@ void pcibios_setup_bus_devices(struct pci_bus *bus)
void pcibios_fixup_bus(struct pci_bus *bus)
{
/* When called from the generic PCI probe, read PCI<->PCI bridge
* bases. This is -not- called when generating the PCI tree from
* the OF device-tree.
*/
if (bus->self != NULL)
pci_read_bridge_bases(bus);
/* Now fixup the bus bus */
/* Fixup the bus */
pcibios_setup_bus_self(bus);
/* Now fixup devices on that bus */

6
arch/mips/pci/pci.c
View file

@ -311,12 +311,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
void pcibios_fixup_bus(struct pci_bus *bus)
{
struct pci_dev *dev = bus->self;
if (pci_has_flag(PCI_PROBE_ONLY) && dev &&
(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
pci_read_bridge_bases(bus);
}
}
EXPORT_SYMBOL(PCIBIOS_MIN_IO);

1
arch/mn10300/unit-asb2305/pci.c
View file

@ -324,7 +324,6 @@ void pcibios_fixup_bus(struct pci_bus *bus)
struct pci_dev *dev;
if (bus->self) {
pci_read_bridge_bases(bus);
pcibios_fixup_bridge_resources(bus->self);
}

8
arch/powerpc/kernel/pci-common.c
View file

@ -1044,13 +1044,7 @@ void pcibios_set_master(struct pci_dev *dev)
void pcibios_fixup_bus(struct pci_bus *bus)
{
/* When called from the generic PCI probe, read PCI<->PCI bridge
* bases. This is -not- called when generating the PCI tree from
* the OF device-tree.
*/
pci_read_bridge_bases(bus);
/* Now fixup the bus bus */
/* Fixup the bus */
pcibios_setup_bus_self(bus);
/* Now fixup devices on that bus */

1
arch/x86/pci/common.c
View file

@ -166,7 +166,6 @@ void pcibios_fixup_bus(struct pci_bus *b)
{
struct pci_dev *dev;
pci_read_bridge_bases(b);
list_for_each_entry(dev, &b->devices, bus_list)
pcibios_fixup_device_resources(dev);
}

4
arch/xtensa/kernel/pci.c
View file

@ -210,10 +210,6 @@ subsys_initcall(pcibios_init);
void pcibios_fixup_bus(struct pci_bus *bus)
{
if (bus->parent) {
/* This is a subordinate bridge */
pci_read_bridge_bases(bus);
}
}
void pcibios_set_master(struct pci_dev *dev)

3
drivers/parisc/dino.c
View file

@ -560,9 +560,6 @@ dino_fixup_bus(struct pci_bus *bus)
} else if (bus->parent) {
int i;
pci_read_bridge_bases(bus);
for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
if((bus->self->resource[i].flags &
(IORESOURCE_IO | IORESOURCE_MEM)) == 0)

1
drivers/parisc/lba_pci.c
View file

@ -693,7 +693,6 @@ lba_fixup_bus(struct pci_bus *bus)
if (bus->parent) {
int i;
/* PCI-PCI Bridge */
pci_read_bridge_bases(bus);
for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++)
pci_claim_bridge_resource(bus->self, i);
} else {

6
drivers/pci/probe.c
View file

@ -826,6 +826,9 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
child->bridge_ctl = bctl;
}
/* Read and initialize bridge resources */
pci_read_bridge_bases(child);
cmax = pci_scan_child_bus(child);
if (cmax > subordinate)
dev_warn(&dev->dev, "bridge has subordinate %02x but max busn %02x\n",
@ -886,6 +889,9 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
if (!is_cardbus) {
child->bridge_ctl = bctl;
/* Read and initialize bridge resources */
pci_read_bridge_bases(child);
max = pci_scan_child_bus(child);
} else {
/*