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[POWERPC] Merge 32 and 64 bits pcibios_enable_device

Browse Source 
This merge the two implementations, based on the previously
fixed up 32 bits one.  The pcibios_enable_device_hook in ppc_md
is now available for ppc64 use.  Also remove the new unused
"initial" parameter from it and fixup users.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2007-12-20 14:54:57 +11:00 committed by Paul Mackerras
parent 24f8c827f9
commit 549beb9ba3
6 changed files with 53 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
arch/powerpc/kernel/pci-common.c
View File

@ -1127,3 +1127,41 @@ void __devinit pcibios_claim_one_bus(struct pci_bus *bus)
}
EXPORT_SYMBOL_GPL(pcibios_claim_one_bus);
#endif /* CONFIG_HOTPLUG */
int pcibios_enable_device(struct pci_dev *dev, int mask)
{
u16 cmd, old_cmd;
int idx;
struct resource *r;
if (ppc_md.pcibios_enable_device_hook)
if (ppc_md.pcibios_enable_device_hook(dev))
return -EINVAL;
pci_read_config_word(dev, PCI_COMMAND, &cmd);
old_cmd = cmd;
for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
/* Only set up the requested stuff */
if (!(mask & (1 << idx)))
continue;
r = &dev->resource[idx];
if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
continue;
if (r->flags & IORESOURCE_UNSET) {
printk(KERN_ERR "PCI: Device %s not available because"
" of resource collisions\n", pci_name(dev));
return -EINVAL;
}
if (r->flags & IORESOURCE_IO)
cmd |= PCI_COMMAND_IO;
if (r->flags & IORESOURCE_MEM)
cmd |= PCI_COMMAND_MEMORY;
}
if (cmd != old_cmd) {
printk("PCI: Enabling device %s (%04x -> %04x)\n",
pci_name(dev), old_cmd, cmd);
pci_write_config_word(dev, PCI_COMMAND, cmd);
}
return 0;
}

37
arch/powerpc/kernel/pci_32.c
View File

@ -518,43 +518,6 @@ pcibios_update_irq(struct pci_dev *dev, int irq)
/* XXX FIXME - update OF device tree node interrupt property */
}
int pcibios_enable_device(struct pci_dev *dev, int mask)
{
u16 cmd, old_cmd;
int idx;
struct resource *r;
if (ppc_md.pcibios_enable_device_hook)
if (ppc_md.pcibios_enable_device_hook(dev, 0))
return -EINVAL;
pci_read_config_word(dev, PCI_COMMAND, &cmd);
old_cmd = cmd;
for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
/* Only set up the requested stuff */
if (!(mask & (1 << idx)))
continue;
r = &dev->resource[idx];
if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
continue;
if (r->flags & IORESOURCE_UNSET) {
printk(KERN_ERR "PCI: Device %s not available because"
" of resource collisions\n", pci_name(dev));
return -EINVAL;
}
if (r->flags & IORESOURCE_IO)
cmd |= PCI_COMMAND_IO;
if (r->flags & IORESOURCE_MEM)
cmd |= PCI_COMMAND_MEMORY;
}
if (cmd != old_cmd) {
printk("PCI: Enabling device %s (%04x -> %04x)\n",
pci_name(dev), old_cmd, cmd);
pci_write_config_word(dev, PCI_COMMAND, cmd);
}
return 0;
}
static struct pci_controller*
pci_bus_to_hose(int bus)
{

30
arch/powerpc/kernel/pci_64.c
View File

@ -436,36 +436,6 @@ static int __init pcibios_init(void)
subsys_initcall(pcibios_init);
int pcibios_enable_device(struct pci_dev *dev, int mask)
{
u16 cmd, oldcmd;
int i;
pci_read_config_word(dev, PCI_COMMAND, &cmd);
oldcmd = cmd;
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
struct resource *res = &dev->resource[i];
/* Only set up the requested stuff */
if (!(mask & (1<<i)))
continue;
if (res->flags & IORESOURCE_IO)
cmd |= PCI_COMMAND_IO;
if (res->flags & IORESOURCE_MEM)
cmd |= PCI_COMMAND_MEMORY;
}
if (cmd != oldcmd) {
printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
pci_name(dev), cmd);
/* Enable the appropriate bits in the PCI command register. */
pci_write_config_word(dev, PCI_COMMAND, cmd);
}
return 0;
}
#ifdef CONFIG_HOTPLUG
int pcibios_unmap_io_space(struct pci_bus *bus)

22
arch/powerpc/platforms/powermac/pci.c
View File

@ -1058,8 +1058,7 @@ void __init pmac_pci_init(void)
#endif
}
int
pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
int pmac_pci_enable_device_hook(struct pci_dev *dev)
{
struct device_node* node;
int updatecfg = 0;
@ -1101,26 +1100,25 @@ pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
updatecfg = 1;
}
/*
* Fixup various header fields on 32 bits. We don't do that on
* 64 bits as some of these have strange values behind the HT
* bridge and we must not, for example, enable MWI or set the
* cache line size on them.
*/
#ifdef CONFIG_PPC32
if (updatecfg) {
u16 cmd;
/*
* Make sure PCI is correctly configured
*
* We use old pci_bios versions of the function since, by
* default, gmac is not powered up, and so will be absent
* from the kernel initial PCI lookup.
*
* Should be replaced by 2.4 new PCI mechanisms and really
* register the device.
*/
pci_read_config_word(dev, PCI_COMMAND, &cmd);
cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
| PCI_COMMAND_INVALIDATE;
pci_write_config_word(dev, PCI_COMMAND, cmd);
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
L1_CACHE_BYTES >> 2);
#endif
}
return 0;

2
arch/powerpc/platforms/powermac/pmac.h
View File

@ -26,7 +26,7 @@ extern void pmac_pci_init(void);
extern void pmac_nvram_update(void);
extern unsigned char pmac_nvram_read_byte(int addr);
extern void pmac_nvram_write_byte(int addr, unsigned char val);
extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial);
extern int pmac_pci_enable_device_hook(struct pci_dev *dev);
extern void pmac_pcibios_after_init(void);
extern int of_show_percpuinfo(struct seq_file *m, int i);

10
include/asm-powerpc/machdep.h
View File

@ -204,12 +204,6 @@ struct machdep_calls {
/*
* optional PCI "hooks"
*/
/* Called when pci_enable_device() is called (initial=0) or
* when a device with no assigned resource is found (initial=1).
* Returns 0 to allow assignment/enabling of the device. */
int (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
/* Called in indirect_* to avoid touching devices */
int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
@ -225,6 +219,10 @@ struct machdep_calls {
/* Called for each PCI bus in the system when it's probed */
void (*pcibios_fixup_bus)(struct pci_bus *);
/* Called when pci_enable_device() is called. Returns 0 to
* allow assignment/enabling of the device. */
int (*pcibios_enable_device_hook)(struct pci_dev *);
/* Called to shutdown machine specific hardware not already controlled
* by other drivers.
*/