Attachment 291907 Details for Bug 313491 – disable selected Supermicro H8DCE motherboard resources

[patch] disable selected Supermicro H8DCE motherboard resources

pnp-supermicro-quirk (text/plain), 2.73 KB, created by Bjorn Helgaas on 2008-01-16 22:51:45 UTC

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Creator: Bjorn Helgaas

Created: 2008-01-16 22:51:45 UTC

Size: 2.73 KB

patch

obsolete

>PNP: disable Supermicro H8DCE motherboard resources that overlap SATA BARs
>
>Some Supermicro BIOSes apparently 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.
>
>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
>
>Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
>
>Index: work5/drivers/pnp/quirks.c
>===================================================================
>--- work5.orig/drivers/pnp/quirks.c	2008-01-04 14:34:43.000000000 -0700
>+++ work5/drivers/pnp/quirks.c	2008-01-16 13:12:53.000000000 -0700
>@@ -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 @@
> 		       "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 @@
> 	{"CTL0043", quirk_sb16audio_resources},
> 	{"CTL0044", quirk_sb16audio_resources},
> 	{"CTL0045", quirk_sb16audio_resources},
>+	{"PNP0c01", quirk_supermicro_h8dce_system},
>+	{"PNP0c02", quirk_supermicro_h8dce_system},
> 	{""}
> };
>

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