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Message-Id: <12124107073972-git-send-email-od@suse.de>
Date: Mon, 2 Jun 2008 14:45:05 +0200
From: Olaf Dabrunz <od@...e.de>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
Jon Masters <jonathan@...masters.org>,
linux-kernel@...r.kernel.org, Olaf Dabrunz <od@...e.de>,
Stefan Assmann <sassmann@...e.de>
Subject: [PATCH 5/7] disable AMD/ATI legacy boot interrupt generation
From: Olaf Dabrunz <od@...e.de>
Add quirks for several AMD/ATI chipsets to prevent generation of legacy boot
interrupts.
Signed-off-by: Olaf Dabrunz <od@...e.de>
Signed-off-by: Stefan Assmann <sassmann@...e.de>
---
drivers/pci/quirks.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 93 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index e2fed6c..090ce38 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1377,6 +1377,99 @@ int nobootirqquirk_setup(char *str)
__setup("nobootirqquirk", nobootirqquirk_setup);
/*
+ * disable boot interrupts on AMD and ATI chipsets
+ */
+#define PCI_X_MISC 0x40
+#define PCI_X_AMD813X_NIOAMODE (1<<0)
+static void quirk_disable_amd_813x_boot_interrupt(struct pci_dev *dev)
+{
+ u32 pci_x_misc;
+
+ if (nobootirqquirk)
+ return;
+
+ pci_read_config_dword(dev, PCI_X_MISC, &pci_x_misc);
+ pci_x_misc &= ~PCI_X_AMD813X_NIOAMODE;
+ pci_write_config_dword(dev, PCI_X_MISC, pci_x_misc);
+
+ printk(KERN_INFO "disabled boot interrupts on PCI device "
+ "0x%04x:0x%04x\n", dev->vendor, dev->device);
+}
+#undef PCI_X_MISC
+#undef PCI_X_AMD813X_NIOAMODE
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_amd_813x_boot_interrupt);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8132_BRIDGE, quirk_disable_amd_813x_boot_interrupt);
+
+#define PCI_AMD8111_PCI_IRQ_ROUTING 0x56
+static void quirk_disable_amd_8111_boot_interrupt(struct pci_dev *dev)
+{
+ u16 pci_irq_routing;
+
+ if (nobootirqquirk)
+ return;
+
+ pci_read_config_word(dev, PCI_AMD8111_PCI_IRQ_ROUTING,
+ &pci_irq_routing);
+ if (!pci_irq_routing) {
+ printk(KERN_INFO "boot interrupts on PCI "
+ "device 0x%04x:0x%04x were "
+ "already disabled\n",
+ dev->vendor, dev->device);
+ return;
+ }
+ pci_write_config_word(dev, PCI_AMD8111_PCI_IRQ_ROUTING, 0);
+ printk(KERN_INFO "disabled boot interrupts on PCI device "
+ "0x%04x:0x%04x\n", dev->vendor, dev->device);
+}
+#undef PCI_AMD8111_PCI_IRQ_ROUTING
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_SMBUS, quirk_disable_amd_8111_boot_interrupt);
+
+#define PCI_AMD_SB700S_FEATURES_ENABLE 0x64
+#define PCI_AMD_SB700S_PIC_ENABLE (1<<0)
+#define PIC_PCI_INTR_INDEX 0xC00
+#define PIC_PCI_INTR_DATA 0xC01
+#define CLEAR_PIC_IRQ_ROUTING(irq) \
+ outb(irq, PIC_PCI_INTR_INDEX); \
+ outb(0x00, PIC_PCI_INTR_DATA);
+static void quirk_disable_amd_sb700s_boot_interrupt(struct pci_dev *dev)
+{
+ u32 feature_enable;
+ u32 saved_feature_enable;
+
+ if (nobootirqquirk)
+ return;
+
+ pci_read_config_dword(dev, PCI_AMD_SB700S_FEATURES_ENABLE,
+ &feature_enable);
+ saved_feature_enable = feature_enable;
+ feature_enable |= PCI_AMD_SB700S_PIC_ENABLE;
+ pci_write_config_dword(dev, PCI_AMD_SB700S_FEATURES_ENABLE,
+ feature_enable);
+
+ CLEAR_PIC_IRQ_ROUTING(0x0);
+ CLEAR_PIC_IRQ_ROUTING(0x1);
+ CLEAR_PIC_IRQ_ROUTING(0x2);
+ CLEAR_PIC_IRQ_ROUTING(0x3);
+ CLEAR_PIC_IRQ_ROUTING(0x4);
+ CLEAR_PIC_IRQ_ROUTING(0x9);
+ CLEAR_PIC_IRQ_ROUTING(0xA);
+ CLEAR_PIC_IRQ_ROUTING(0xB);
+ CLEAR_PIC_IRQ_ROUTING(0xC);
+
+ pci_write_config_dword(dev, PCI_AMD_SB700S_FEATURES_ENABLE,
+ saved_feature_enable);
+
+ printk(KERN_INFO "disabled boot interrupts on PCI device "
+ "0x%04x:0x%04x\n", dev->vendor, dev->device);
+}
+#undef PCI_AMD_SB700S_FEATURES_ENABLE
+#undef PCI_AMD_SB700S_PIC_ENABLE
+#undef PIC_PCI_INTR_INDEX
+#undef PIC_PCI_INTR_DATA
+#undef CLEAR_PIC_IRQ_ROUTING
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SMBUS, quirk_disable_amd_sb700s_boot_interrupt);
+
+/*
* disabled boot interrupts on HT-1000
*/
static void quirk_disable_broadcom_boot_interrupt(struct pci_dev *dev)
--
1.5.2.4
--
Olaf Dabrunz (od/odabrunz), SUSE Linux Products GmbH, Nürnberg
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