2005-04-16 16:20:36 -06:00
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/*
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* drivers/pci/setup-res.c
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*
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* Extruded from code written by
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* Dave Rusling (david.rusling@reo.mts.dec.com)
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* David Mosberger (davidm@cs.arizona.edu)
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* David Miller (davem@redhat.com)
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*
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* Support routines for initializing a PCI subsystem.
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*/
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/* fixed for multiple pci buses, 1999 Andrea Arcangeli <andrea@suse.de> */
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/*
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* Nov 2000, Ivan Kokshaysky <ink@jurassic.park.msu.ru>
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* Resource sorting
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/cache.h>
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#include <linux/slab.h>
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#include "pci.h"
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2008-11-21 11:38:52 -07:00
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void pci_update_resource(struct pci_dev *dev, int resno)
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2005-04-16 16:20:36 -06:00
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{
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struct pci_bus_region region;
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u32 new, check, mask;
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int reg;
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2008-11-21 11:38:52 -07:00
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struct resource *res = dev->resource + resno;
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2005-04-16 16:20:36 -06:00
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2006-12-19 14:12:08 -07:00
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/*
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* Ignore resources for unimplemented BARs and unused resource slots
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* for 64 bit BARs.
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*/
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2005-08-07 03:49:59 -06:00
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if (!res->flags)
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return;
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2006-12-19 14:12:08 -07:00
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/*
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* Ignore non-moveable resources. This might be legacy resources for
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* which no functional BAR register exists or another important
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2008-06-13 10:52:11 -06:00
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* system resource we shouldn't move around.
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2006-12-19 14:12:08 -07:00
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*/
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if (res->flags & IORESOURCE_PCI_FIXED)
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return;
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2005-04-16 16:20:36 -06:00
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pcibios_resource_to_bus(dev, ®ion, res);
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2008-10-19 22:07:37 -06:00
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dev_dbg(&dev->dev, "BAR %d: got res %pR bus [%#llx-%#llx] "
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"flags %#lx\n", resno, res,
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2007-12-09 23:32:16 -07:00
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(unsigned long long)region.start,
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(unsigned long long)region.end,
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2008-06-13 10:52:11 -06:00
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(unsigned long)res->flags);
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2005-04-16 16:20:36 -06:00
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new = region.start | (res->flags & PCI_REGION_FLAG_MASK);
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if (res->flags & IORESOURCE_IO)
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mask = (u32)PCI_BASE_ADDRESS_IO_MASK;
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else
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mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;
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if (resno < 6) {
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reg = PCI_BASE_ADDRESS_0 + 4 * resno;
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} else if (resno == PCI_ROM_RESOURCE) {
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2005-08-26 11:49:22 -06:00
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if (!(res->flags & IORESOURCE_ROM_ENABLE))
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return;
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new |= PCI_ROM_ADDRESS_ENABLE;
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2005-04-16 16:20:36 -06:00
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reg = dev->rom_base_reg;
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} else {
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/* Hmm, non-standard resource. */
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return; /* kill uninitialised var warning */
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}
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pci_write_config_dword(dev, reg, new);
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pci_read_config_dword(dev, reg, &check);
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if ((new ^ check) & mask) {
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2008-06-13 10:52:11 -06:00
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dev_err(&dev->dev, "BAR %d: error updating (%#08x != %#08x)\n",
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resno, new, check);
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2005-04-16 16:20:36 -06:00
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}
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if ((new & (PCI_BASE_ADDRESS_SPACE|PCI_BASE_ADDRESS_MEM_TYPE_MASK)) ==
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(PCI_BASE_ADDRESS_SPACE_MEMORY|PCI_BASE_ADDRESS_MEM_TYPE_64)) {
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2005-08-07 03:49:59 -06:00
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new = region.start >> 16 >> 16;
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2005-04-16 16:20:36 -06:00
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pci_write_config_dword(dev, reg + 4, new);
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pci_read_config_dword(dev, reg + 4, &check);
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if (check != new) {
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2008-06-13 10:52:11 -06:00
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dev_err(&dev->dev, "BAR %d: error updating "
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"(high %#08x != %#08x)\n", resno, new, check);
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2005-04-16 16:20:36 -06:00
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}
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}
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res->flags &= ~IORESOURCE_UNSET;
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2008-06-13 10:52:11 -06:00
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dev_dbg(&dev->dev, "BAR %d: moved to bus [%#llx-%#llx] flags %#lx\n",
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resno, (unsigned long long)region.start,
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(unsigned long long)region.end, res->flags);
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2005-04-16 16:20:36 -06:00
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}
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2007-03-26 23:53:30 -06:00
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int pci_claim_resource(struct pci_dev *dev, int resource)
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2005-04-16 16:20:36 -06:00
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{
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struct resource *res = &dev->resource[resource];
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struct resource *root = NULL;
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char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
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int err;
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2005-08-08 14:19:08 -06:00
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root = pcibios_select_root(dev, res);
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2005-04-16 16:20:36 -06:00
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err = -EINVAL;
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if (root != NULL)
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err = insert_resource(root, res);
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if (err) {
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2008-10-19 22:07:37 -06:00
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dev_err(&dev->dev, "BAR %d: %s of %s %pR\n",
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2008-06-13 10:52:11 -06:00
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resource,
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root ? "address space collision on" :
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"no parent found for",
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2008-10-19 22:07:37 -06:00
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dtype, res);
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2005-04-16 16:20:36 -06:00
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}
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return err;
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}
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int pci_assign_resource(struct pci_dev *dev, int resno)
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{
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struct pci_bus *bus = dev->bus;
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struct resource *res = dev->resource + resno;
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2006-06-12 18:06:02 -06:00
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resource_size_t size, min, align;
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2005-04-16 16:20:36 -06:00
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int ret;
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2008-10-13 05:24:28 -06:00
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size = resource_size(res);
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2005-04-16 16:20:36 -06:00
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min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;
|
PCI: clean up resource alignment management
Done per Linus' request and suggestions. Linus has explained that
better than I'll be able to explain:
On Thu, Mar 27, 2008 at 10:12:10AM -0700, Linus Torvalds wrote:
> Actually, before we go any further, there might be a less intrusive
> alternative: add just a couple of flags to the resource flags field (we
> still have something like 8 unused bits on 32-bit), and use those to
> implement a generic "resource_alignment()" routine.
>
> Two flags would do it:
>
> - IORESOURCE_SIZEALIGN: size indicates alignment (regular PCI device
> resources)
>
> - IORESOURCE_STARTALIGN: start field is alignment (PCI bus resources
> during probing)
>
> and then the case of both flags zero (or both bits set) would actually be
> "invalid", and we would also clear the IORESOURCE_STARTALIGN flag when we
> actually allocate the resource (so that we don't use the "start" field as
> alignment incorrectly when it no longer indicates alignment).
>
> That wouldn't be totally generic, but it would have the nice property of
> automatically at least add sanity checking for that whole "res->start has
> the odd meaning of 'alignment' during probing" and remove the need for a
> new field, and it would allow us to have a generic "resource_alignment()"
> routine that just gets a resource pointer.
Besides, I removed IORESOURCE_BUS_HAS_VGA flag which was unused for ages.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Gary Hade <garyhade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-30 09:50:14 -06:00
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align = resource_alignment(res);
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if (!align) {
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2008-12-11 22:49:40 -07:00
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dev_info(&dev->dev, "BAR %d: can't allocate resource (bogus "
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2008-10-19 22:07:37 -06:00
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"alignment) %pR flags %#lx\n",
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resno, res, res->flags);
|
PCI: clean up resource alignment management
Done per Linus' request and suggestions. Linus has explained that
better than I'll be able to explain:
On Thu, Mar 27, 2008 at 10:12:10AM -0700, Linus Torvalds wrote:
> Actually, before we go any further, there might be a less intrusive
> alternative: add just a couple of flags to the resource flags field (we
> still have something like 8 unused bits on 32-bit), and use those to
> implement a generic "resource_alignment()" routine.
>
> Two flags would do it:
>
> - IORESOURCE_SIZEALIGN: size indicates alignment (regular PCI device
> resources)
>
> - IORESOURCE_STARTALIGN: start field is alignment (PCI bus resources
> during probing)
>
> and then the case of both flags zero (or both bits set) would actually be
> "invalid", and we would also clear the IORESOURCE_STARTALIGN flag when we
> actually allocate the resource (so that we don't use the "start" field as
> alignment incorrectly when it no longer indicates alignment).
>
> That wouldn't be totally generic, but it would have the nice property of
> automatically at least add sanity checking for that whole "res->start has
> the odd meaning of 'alignment' during probing" and remove the need for a
> new field, and it would allow us to have a generic "resource_alignment()"
> routine that just gets a resource pointer.
Besides, I removed IORESOURCE_BUS_HAS_VGA flag which was unused for ages.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Gary Hade <garyhade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-30 09:50:14 -06:00
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return -EINVAL;
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}
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2005-04-16 16:20:36 -06:00
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/* First, try exact prefetching match.. */
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ret = pci_bus_alloc_resource(bus, res, size, align, min,
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IORESOURCE_PREFETCH,
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pcibios_align_resource, dev);
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if (ret < 0 && (res->flags & IORESOURCE_PREFETCH)) {
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/*
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* That failed.
|
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*
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* But a prefetching area can handle a non-prefetching
|
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|
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* window (it will just not perform as well).
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|
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*/
|
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ret = pci_bus_alloc_resource(bus, res, size, align, min, 0,
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|
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pcibios_align_resource, dev);
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}
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|
|
|
|
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if (ret) {
|
2008-12-11 22:49:40 -07:00
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dev_info(&dev->dev, "BAR %d: can't allocate %s resource %pR\n",
|
2008-10-19 22:07:37 -06:00
|
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resno, res->flags & IORESOURCE_IO ? "I/O" : "mem", res);
|
PCI: clean up resource alignment management
Done per Linus' request and suggestions. Linus has explained that
better than I'll be able to explain:
On Thu, Mar 27, 2008 at 10:12:10AM -0700, Linus Torvalds wrote:
> Actually, before we go any further, there might be a less intrusive
> alternative: add just a couple of flags to the resource flags field (we
> still have something like 8 unused bits on 32-bit), and use those to
> implement a generic "resource_alignment()" routine.
>
> Two flags would do it:
>
> - IORESOURCE_SIZEALIGN: size indicates alignment (regular PCI device
> resources)
>
> - IORESOURCE_STARTALIGN: start field is alignment (PCI bus resources
> during probing)
>
> and then the case of both flags zero (or both bits set) would actually be
> "invalid", and we would also clear the IORESOURCE_STARTALIGN flag when we
> actually allocate the resource (so that we don't use the "start" field as
> alignment incorrectly when it no longer indicates alignment).
>
> That wouldn't be totally generic, but it would have the nice property of
> automatically at least add sanity checking for that whole "res->start has
> the odd meaning of 'alignment' during probing" and remove the need for a
> new field, and it would allow us to have a generic "resource_alignment()"
> routine that just gets a resource pointer.
Besides, I removed IORESOURCE_BUS_HAS_VGA flag which was unused for ages.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Gary Hade <garyhade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-30 09:50:14 -06:00
|
|
|
} else {
|
|
|
|
res->flags &= ~IORESOURCE_STARTALIGN;
|
|
|
|
if (resno < PCI_BRIDGE_RESOURCES)
|
2008-11-21 11:38:52 -07:00
|
|
|
pci_update_resource(dev, resno);
|
2005-04-16 16:20:36 -06:00
|
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|
}
|
|
|
|
|
|
|
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return ret;
|
|
|
|
}
|
|
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|
2008-02-13 14:30:12 -07:00
|
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|
#if 0
|
2006-05-01 09:43:46 -06:00
|
|
|
int pci_assign_resource_fixed(struct pci_dev *dev, int resno)
|
|
|
|
{
|
|
|
|
struct pci_bus *bus = dev->bus;
|
|
|
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struct resource *res = dev->resource + resno;
|
|
|
|
unsigned int type_mask;
|
|
|
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int i, ret = -EBUSY;
|
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|
|
|
|
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type_mask = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH;
|
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|
|
|
|
|
|
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) {
|
2008-10-19 22:07:37 -06:00
|
|
|
dev_err(&dev->dev, "BAR %d: can't allocate %s resource %pR\n",
|
|
|
|
resno, res->flags & IORESOURCE_IO ? "I/O" : "mem", res);
|
2006-05-01 09:43:46 -06:00
|
|
|
} else if (resno < PCI_BRIDGE_RESOURCES) {
|
2008-11-21 11:38:52 -07:00
|
|
|
pci_update_resource(dev, resno);
|
2006-05-01 09:43:46 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(pci_assign_resource_fixed);
|
|
|
|
#endif
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Sort resources by alignment */
|
2007-03-26 23:53:30 -06:00
|
|
|
void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
|
|
|
|
struct resource *r;
|
|
|
|
struct resource_list *list, *tmp;
|
2006-06-12 18:06:02 -06:00
|
|
|
resource_size_t r_align;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
r = &dev->resource[i];
|
2006-12-19 14:12:08 -07:00
|
|
|
|
|
|
|
if (r->flags & IORESOURCE_PCI_FIXED)
|
|
|
|
continue;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!(r->flags) || r->parent)
|
|
|
|
continue;
|
PCI: clean up resource alignment management
Done per Linus' request and suggestions. Linus has explained that
better than I'll be able to explain:
On Thu, Mar 27, 2008 at 10:12:10AM -0700, Linus Torvalds wrote:
> Actually, before we go any further, there might be a less intrusive
> alternative: add just a couple of flags to the resource flags field (we
> still have something like 8 unused bits on 32-bit), and use those to
> implement a generic "resource_alignment()" routine.
>
> Two flags would do it:
>
> - IORESOURCE_SIZEALIGN: size indicates alignment (regular PCI device
> resources)
>
> - IORESOURCE_STARTALIGN: start field is alignment (PCI bus resources
> during probing)
>
> and then the case of both flags zero (or both bits set) would actually be
> "invalid", and we would also clear the IORESOURCE_STARTALIGN flag when we
> actually allocate the resource (so that we don't use the "start" field as
> alignment incorrectly when it no longer indicates alignment).
>
> That wouldn't be totally generic, but it would have the nice property of
> automatically at least add sanity checking for that whole "res->start has
> the odd meaning of 'alignment' during probing" and remove the need for a
> new field, and it would allow us to have a generic "resource_alignment()"
> routine that just gets a resource pointer.
Besides, I removed IORESOURCE_BUS_HAS_VGA flag which was unused for ages.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Gary Hade <garyhade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-30 09:50:14 -06:00
|
|
|
|
|
|
|
r_align = resource_alignment(r);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!r_align) {
|
2008-06-13 10:52:11 -06:00
|
|
|
dev_warn(&dev->dev, "BAR %d: bogus alignment "
|
2008-10-19 22:07:37 -06:00
|
|
|
"%pR flags %#lx\n",
|
|
|
|
i, r, r->flags);
|
2005-04-16 16:20:36 -06:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
for (list = head; ; list = list->next) {
|
2006-06-12 18:06:02 -06:00
|
|
|
resource_size_t align = 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
struct resource_list *ln = list->next;
|
PCI: clean up resource alignment management
Done per Linus' request and suggestions. Linus has explained that
better than I'll be able to explain:
On Thu, Mar 27, 2008 at 10:12:10AM -0700, Linus Torvalds wrote:
> Actually, before we go any further, there might be a less intrusive
> alternative: add just a couple of flags to the resource flags field (we
> still have something like 8 unused bits on 32-bit), and use those to
> implement a generic "resource_alignment()" routine.
>
> Two flags would do it:
>
> - IORESOURCE_SIZEALIGN: size indicates alignment (regular PCI device
> resources)
>
> - IORESOURCE_STARTALIGN: start field is alignment (PCI bus resources
> during probing)
>
> and then the case of both flags zero (or both bits set) would actually be
> "invalid", and we would also clear the IORESOURCE_STARTALIGN flag when we
> actually allocate the resource (so that we don't use the "start" field as
> alignment incorrectly when it no longer indicates alignment).
>
> That wouldn't be totally generic, but it would have the nice property of
> automatically at least add sanity checking for that whole "res->start has
> the odd meaning of 'alignment' during probing" and remove the need for a
> new field, and it would allow us to have a generic "resource_alignment()"
> routine that just gets a resource pointer.
Besides, I removed IORESOURCE_BUS_HAS_VGA flag which was unused for ages.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Gary Hade <garyhade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-30 09:50:14 -06:00
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if (ln)
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align = resource_alignment(ln->res);
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2005-04-16 16:20:36 -06:00
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if (r_align > align) {
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tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
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if (!tmp)
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panic("pdev_sort_resources(): "
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"kmalloc() failed!\n");
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tmp->next = ln;
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tmp->res = r;
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tmp->dev = dev;
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list->next = tmp;
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break;
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}
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}
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}
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}
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2008-03-04 11:56:47 -07:00
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int pci_enable_resources(struct pci_dev *dev, int mask)
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{
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u16 cmd, old_cmd;
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int i;
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struct resource *r;
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pci_read_config_word(dev, PCI_COMMAND, &cmd);
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old_cmd = cmd;
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for (i = 0; i < PCI_NUM_RESOURCES; i++) {
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if (!(mask & (1 << i)))
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continue;
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r = &dev->resource[i];
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if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
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continue;
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if ((i == PCI_ROM_RESOURCE) &&
|
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(!(r->flags & IORESOURCE_ROM_ENABLE)))
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continue;
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if (!r->parent) {
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dev_err(&dev->dev, "device not available because of "
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2008-10-19 22:07:37 -06:00
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"BAR %d %pR collisions\n", i, r);
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2008-03-04 11:56:47 -07:00
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return -EINVAL;
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}
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if (r->flags & IORESOURCE_IO)
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cmd |= PCI_COMMAND_IO;
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if (r->flags & IORESOURCE_MEM)
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cmd |= PCI_COMMAND_MEMORY;
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}
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if (cmd != old_cmd) {
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dev_info(&dev->dev, "enabling device (%04x -> %04x)\n",
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old_cmd, cmd);
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pci_write_config_word(dev, PCI_COMMAND, cmd);
|
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}
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return 0;
|
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}
|