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PNP: disable Supermicro H8DCE motherboard resources that overlap SATA BARs 

Some Supermicro BIOSes describe a SATA PCI BAR as a motherboard resource.
The PNP system driver claims motherboard resources, and this prevents the
sata_nv driver from requesting it later.

This patch disables the PNP0C01/PNP0C02 resources so they won't be claimed
by the PNP system driver, so they'll available for sata_nv.

This fixes the bugs below, where sata_nv detects only two out of four SATA
drives.  The signature includes dmesg lines similar to these:

  pnp: 00:09: iomem range 0xdfefc000-0xdfefcfff has been reserved
  pnp: 00:09: iomem range 0xdfefd000-0xdfefd3ff has been reserved
  pnp: 00:09: iomem range 0xdfefe000-0xdfefe3ff has been reserved

  PCI: Unable to reserve mem region #6:1000@dfefd000 for device 0000:80:07.0
  sata_nv: probe of 0000:80:07.0 failed with error -16
  PCI: Unable to reserve mem region #6:1000@dfefe000 for device 0000:80:08.0
  sata_nv: probe of 0000:80:08.0 failed with error -16

References:
    https://bugzilla.redhat.com/show_bug.cgi?id=280641
    https://bugzilla.redhat.com/show_bug.cgi?id=313491
    http://lkml.org/lkml/2008/1/9/449
    http://thread.gmane.org/gmane.linux.acpi.devel/27312

This is post-2.6.24 material.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bjorn Helgaas 2008-02-06 01:40:08 -08:00 committed by Linus Torvalds
parent 5d38998ed1
commit 445a1d3e24
1 changed files with 43 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/pnp/quirks.c
View File

@ -17,6 +17,7 @@
#include <linux/slab.h>
#include <linux/pnp.h>
#include <linux/io.h>
#include <linux/dmi.h>
#include <linux/kallsyms.h>
#include "base.h"
@ -108,6 +109,46 @@ static void quirk_sb16audio_resources(struct pnp_dev *dev)
"pnp: SB audio device quirk - increasing port range\n");
}
static void quirk_supermicro_h8dce_system(struct pnp_dev *dev)
{
int i;
static struct dmi_system_id supermicro_h8dce[] = {
{
.ident = "Supermicro H8DCE",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
DMI_MATCH(DMI_PRODUCT_NAME, "H8DCE"),
},
},
{ }
};
if (!dmi_check_system(supermicro_h8dce))
return;
/*
* On the Supermicro H8DCE, there's a system device with resources
* that overlap BAR 6 of the built-in SATA PCI adapter. If the PNP
* system device claims them, the sata_nv driver won't be able to.
* More details at:
* https://bugzilla.redhat.com/show_bug.cgi?id=280641
* https://bugzilla.redhat.com/show_bug.cgi?id=313491
* http://lkml.org/lkml/2008/1/9/449
* http://thread.gmane.org/gmane.linux.acpi.devel/27312
*/
for (i = 0; i < PNP_MAX_MEM; i++) {
if (pnp_mem_valid(dev, i) && pnp_mem_len(dev, i) &&
(pnp_mem_start(dev, i) & 0xdfef0000) == 0xdfef0000) {
dev_warn(&dev->dev, "disabling 0x%llx-0x%llx to prevent"
" conflict with sata_nv PCI device\n",
(unsigned long long) pnp_mem_start(dev, i),
(unsigned long long) (pnp_mem_start(dev, i) +
pnp_mem_len(dev, i) - 1));
pnp_mem_flags(dev, i) = 0;
}
}
}
/*
* PnP Quirks
* Cards or devices that need some tweaking due to incomplete resource info
@ -128,6 +169,8 @@ static struct pnp_fixup pnp_fixups[] = {
{"CTL0043", quirk_sb16audio_resources},
{"CTL0044", quirk_sb16audio_resources},
{"CTL0045", quirk_sb16audio_resources},
{"PNP0c01", quirk_supermicro_h8dce_system},
{"PNP0c02", quirk_supermicro_h8dce_system},
{""}
};