forked from Minki/linux
6015fbefc4
This adds appropriate casts to avoid a warning and print the correct values in pr_debug. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
266 lines
6.8 KiB
C
266 lines
6.8 KiB
C
/*
|
|
* drivers/pci/setup-res.c
|
|
*
|
|
* Extruded from code written by
|
|
* Dave Rusling (david.rusling@reo.mts.dec.com)
|
|
* David Mosberger (davidm@cs.arizona.edu)
|
|
* David Miller (davem@redhat.com)
|
|
*
|
|
* Support routines for initializing a PCI subsystem.
|
|
*/
|
|
|
|
/* fixed for multiple pci buses, 1999 Andrea Arcangeli <andrea@suse.de> */
|
|
|
|
/*
|
|
* Nov 2000, Ivan Kokshaysky <ink@jurassic.park.msu.ru>
|
|
* Resource sorting
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/cache.h>
|
|
#include <linux/slab.h>
|
|
#include "pci.h"
|
|
|
|
|
|
void
|
|
pci_update_resource(struct pci_dev *dev, struct resource *res, int resno)
|
|
{
|
|
struct pci_bus_region region;
|
|
u32 new, check, mask;
|
|
int reg;
|
|
|
|
/*
|
|
* Ignore resources for unimplemented BARs and unused resource slots
|
|
* for 64 bit BARs.
|
|
*/
|
|
if (!res->flags)
|
|
return;
|
|
|
|
/*
|
|
* Ignore non-moveable resources. This might be legacy resources for
|
|
* which no functional BAR register exists or another important
|
|
* system resource we should better not move around in system address
|
|
* space.
|
|
*/
|
|
if (res->flags & IORESOURCE_PCI_FIXED)
|
|
return;
|
|
|
|
pcibios_resource_to_bus(dev, ®ion, res);
|
|
|
|
pr_debug(" got res [%llx:%llx] bus [%llx:%llx] flags %lx for "
|
|
"BAR %d of %s\n", (unsigned long long)res->start,
|
|
(unsigned long long)res->end,
|
|
(unsigned long long)region.start,
|
|
(unsigned long long)region.end,
|
|
(unsigned long)res->flags, resno, pci_name(dev));
|
|
|
|
new = region.start | (res->flags & PCI_REGION_FLAG_MASK);
|
|
if (res->flags & IORESOURCE_IO)
|
|
mask = (u32)PCI_BASE_ADDRESS_IO_MASK;
|
|
else
|
|
mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;
|
|
|
|
if (resno < 6) {
|
|
reg = PCI_BASE_ADDRESS_0 + 4 * resno;
|
|
} else if (resno == PCI_ROM_RESOURCE) {
|
|
if (!(res->flags & IORESOURCE_ROM_ENABLE))
|
|
return;
|
|
new |= PCI_ROM_ADDRESS_ENABLE;
|
|
reg = dev->rom_base_reg;
|
|
} else {
|
|
/* Hmm, non-standard resource. */
|
|
|
|
return; /* kill uninitialised var warning */
|
|
}
|
|
|
|
pci_write_config_dword(dev, reg, new);
|
|
pci_read_config_dword(dev, reg, &check);
|
|
|
|
if ((new ^ check) & mask) {
|
|
printk(KERN_ERR "PCI: Error while updating region "
|
|
"%s/%d (%08x != %08x)\n", pci_name(dev), resno,
|
|
new, check);
|
|
}
|
|
|
|
if ((new & (PCI_BASE_ADDRESS_SPACE|PCI_BASE_ADDRESS_MEM_TYPE_MASK)) ==
|
|
(PCI_BASE_ADDRESS_SPACE_MEMORY|PCI_BASE_ADDRESS_MEM_TYPE_64)) {
|
|
new = region.start >> 16 >> 16;
|
|
pci_write_config_dword(dev, reg + 4, new);
|
|
pci_read_config_dword(dev, reg + 4, &check);
|
|
if (check != new) {
|
|
printk(KERN_ERR "PCI: Error updating region "
|
|
"%s/%d (high %08x != %08x)\n",
|
|
pci_name(dev), resno, new, check);
|
|
}
|
|
}
|
|
res->flags &= ~IORESOURCE_UNSET;
|
|
pr_debug("PCI: moved device %s resource %d (%lx) to %x\n",
|
|
pci_name(dev), resno, res->flags,
|
|
new & ~PCI_REGION_FLAG_MASK);
|
|
}
|
|
|
|
int pci_claim_resource(struct pci_dev *dev, int resource)
|
|
{
|
|
struct resource *res = &dev->resource[resource];
|
|
struct resource *root = NULL;
|
|
char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
|
|
int err;
|
|
|
|
root = pcibios_select_root(dev, res);
|
|
|
|
err = -EINVAL;
|
|
if (root != NULL)
|
|
err = insert_resource(root, res);
|
|
|
|
if (err) {
|
|
printk(KERN_ERR "PCI: %s region %d of %s %s [%llx:%llx]\n",
|
|
root ? "Address space collision on" :
|
|
"No parent found for",
|
|
resource, dtype, pci_name(dev),
|
|
(unsigned long long)res->start,
|
|
(unsigned long long)res->end);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int pci_assign_resource(struct pci_dev *dev, int resno)
|
|
{
|
|
struct pci_bus *bus = dev->bus;
|
|
struct resource *res = dev->resource + resno;
|
|
resource_size_t size, min, align;
|
|
int ret;
|
|
|
|
size = res->end - res->start + 1;
|
|
min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;
|
|
/* The bridge resources are special, as their
|
|
size != alignment. Sizing routines return
|
|
required alignment in the "start" field. */
|
|
align = (resno < PCI_BRIDGE_RESOURCES) ? size : res->start;
|
|
|
|
/* First, try exact prefetching match.. */
|
|
ret = pci_bus_alloc_resource(bus, res, size, align, min,
|
|
IORESOURCE_PREFETCH,
|
|
pcibios_align_resource, dev);
|
|
|
|
if (ret < 0 && (res->flags & IORESOURCE_PREFETCH)) {
|
|
/*
|
|
* That failed.
|
|
*
|
|
* But a prefetching area can handle a non-prefetching
|
|
* window (it will just not perform as well).
|
|
*/
|
|
ret = pci_bus_alloc_resource(bus, res, size, align, min, 0,
|
|
pcibios_align_resource, dev);
|
|
}
|
|
|
|
if (ret) {
|
|
printk(KERN_ERR "PCI: Failed to allocate %s resource "
|
|
"#%d:%llx@%llx for %s\n",
|
|
res->flags & IORESOURCE_IO ? "I/O" : "mem",
|
|
resno, (unsigned long long)size,
|
|
(unsigned long long)res->start, pci_name(dev));
|
|
} else if (resno < PCI_BRIDGE_RESOURCES) {
|
|
pci_update_resource(dev, res, resno);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_EMBEDDED
|
|
int pci_assign_resource_fixed(struct pci_dev *dev, int resno)
|
|
{
|
|
struct pci_bus *bus = dev->bus;
|
|
struct resource *res = dev->resource + resno;
|
|
unsigned int type_mask;
|
|
int i, ret = -EBUSY;
|
|
|
|
type_mask = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH;
|
|
|
|
for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
|
|
struct resource *r = bus->resource[i];
|
|
if (!r)
|
|
continue;
|
|
|
|
/* type_mask must match */
|
|
if ((res->flags ^ r->flags) & type_mask)
|
|
continue;
|
|
|
|
ret = request_resource(r, res);
|
|
|
|
if (ret == 0)
|
|
break;
|
|
}
|
|
|
|
if (ret) {
|
|
printk(KERN_ERR "PCI: Failed to allocate %s resource "
|
|
"#%d:%llx@%llx for %s\n",
|
|
res->flags & IORESOURCE_IO ? "I/O" : "mem",
|
|
resno, (unsigned long long)(res->end - res->start + 1),
|
|
(unsigned long long)res->start, pci_name(dev));
|
|
} else if (resno < PCI_BRIDGE_RESOURCES) {
|
|
pci_update_resource(dev, res, resno);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pci_assign_resource_fixed);
|
|
#endif
|
|
|
|
/* Sort resources by alignment */
|
|
void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
|
|
struct resource *r;
|
|
struct resource_list *list, *tmp;
|
|
resource_size_t r_align;
|
|
|
|
r = &dev->resource[i];
|
|
|
|
if (r->flags & IORESOURCE_PCI_FIXED)
|
|
continue;
|
|
|
|
r_align = r->end - r->start;
|
|
|
|
if (!(r->flags) || r->parent)
|
|
continue;
|
|
if (!r_align) {
|
|
printk(KERN_WARNING "PCI: Ignore bogus resource %d "
|
|
"[%llx:%llx] of %s\n",
|
|
i, (unsigned long long)r->start,
|
|
(unsigned long long)r->end, pci_name(dev));
|
|
continue;
|
|
}
|
|
r_align = (i < PCI_BRIDGE_RESOURCES) ? r_align + 1 : r->start;
|
|
for (list = head; ; list = list->next) {
|
|
resource_size_t align = 0;
|
|
struct resource_list *ln = list->next;
|
|
int idx;
|
|
|
|
if (ln) {
|
|
idx = ln->res - &ln->dev->resource[0];
|
|
align = (idx < PCI_BRIDGE_RESOURCES) ?
|
|
ln->res->end - ln->res->start + 1 :
|
|
ln->res->start;
|
|
}
|
|
if (r_align > align) {
|
|
tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
|
|
if (!tmp)
|
|
panic("pdev_sort_resources(): "
|
|
"kmalloc() failed!\n");
|
|
tmp->next = ln;
|
|
tmp->res = r;
|
|
tmp->dev = dev;
|
|
list->next = tmp;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|