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Date: Tue, 3 Jun 2008 12:56:28 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: Olaf Dabrunz <od@...e.de>
cc: Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
Jon Masters <jonathan@...masters.org>,
linux-kernel@...r.kernel.org, Stefan Assmann <sassmann@...e.de>
Subject: Re: [PATCH 7/7] bootirqquirk= parameter to enable bootirq quirks
for additional chips
On Mon, 2 Jun 2008, Olaf Dabrunz wrote:
> From: Olaf Dabrunz <od@...e.de>
>
> The existing bootirq quirks and the reroute workaround may work for other chips
> where we could not test them. This parameter allows users to apply these to
> other chips without the need to re-build the kernel.
>
> This patch was conceived simultaneously by Stefan Assmann, Daniel Gollub and
> Olaf Dabrunz. The implementation is the author's.
>
> bootirqquirk=0x<vendor>,0x<device>,<quirk_type>
>
> - quirk type 1 - 32 selects an IRQ reroute algorithm for devices
> connected to that PCI bridge (currently only algorithm "1" is
> implemented),
>
> - quirk type 33 - x applies one of the known quirks to the PCI
> device, currently these:
>
> 33 -> quirk_disable_intel_boot_interrupt
> 34 -> quirk_disable_broadcom_boot_interrupt
> 35 -> quirk_disable_amd_8111_boot_interrupt
> 36 -> quirk_disable_amd_813x_boot_interrupt
> 37 -> quirk_disable_amd_sb700s_boot_interrupt
Oh no. This can be used as an debug aid when the need arises, but we
dont want to add this to the kernel.
Thanks,
tglx
> Signed-off-by: Olaf Dabrunz <od@...e.de>
> Signed-off-by: Stefan Assmann <sassmann@...e.de>
> ---
> drivers/pci/quirks.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 118 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 090ce38..bb7fa65 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -1576,6 +1576,113 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_1, quirk_re
> DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHV, quirk_reroute_to_boot_interrupts_intel);
> DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80332_0, quirk_reroute_to_boot_interrupts_intel);
> DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80332_1, quirk_reroute_to_boot_interrupts_intel);
> +
> +/*
> + * For additional boot irq quirks save boot time settings or call the quirks
> + * directly.
> + */
> +
> +#define MAX_BOOTTIME_CONFIG_PCI_FIXUPS_EARLY 32
> +struct pci_fixup __start_bc_pci_fixups_early[MAX_BOOTTIME_CONFIG_PCI_FIXUPS_EARLY];
> +struct pci_fixup *__end_bc_pci_fixups_early = __start_bc_pci_fixups_early +
> + MAX_BOOTTIME_CONFIG_PCI_FIXUPS_EARLY;
> +
> +static void (*bootirq_quirk_func[])(struct pci_dev *dev) = {
> + &quirk_disable_intel_boot_interrupt,
> + &quirk_disable_broadcom_boot_interrupt,
> + &quirk_disable_amd_8111_boot_interrupt,
> + &quirk_disable_amd_813x_boot_interrupt,
> + &quirk_disable_amd_sb700s_boot_interrupt,
> +};
> +
> +int __init bootirqquirk_setup(char *str)
> +{
> + int ints[4];
> + struct quirk_bootirq_reroute_dev tmp;
> + int i;
> +
> + str = get_options(str, ARRAY_SIZE(ints), ints);
> + if (!str)
> + return 0;
> +
> + if (nobootirqquirk)
> + return 1;
> +
> + /* all parameters are required */
> + if (ints[0] != 3)
> + return 0;
> +
> + /* save settings */
> + tmp.vendor = ints[1];
> + tmp.device = ints[2];
> + tmp.quirk_variant = ints[3];
> +
> + /*
> + * quirk variants > MAX_QUIRK_BOOTIRQ_REROUTE_VARIANTS select quirk
> + * functions
> + */
> + if (tmp.quirk_variant > MAX_QUIRK_BOOTIRQ_REROUTE_VARIANTS) {
> + for (i = 0; i < MAX_BOOTTIME_CONFIG_PCI_FIXUPS_EARLY; i++) {
> + if (__start_bc_pci_fixups_early[i].vendor == 0)
> + break;
> +
> + if (__start_bc_pci_fixups_early[i].vendor == tmp.vendor &&
> + __start_bc_pci_fixups_early[i].device == tmp.device)
> + return 1; /* already in array */
> + }
> +
> + if (i >= MAX_BOOTTIME_CONFIG_PCI_FIXUPS_EARLY) {
> + printk(KERN_INFO "PCI quirk: too many boottime "
> + "configurable early quirk entries when "
> + "trying to add 0x%04x:0x%04x\n",
> + tmp.vendor, tmp.device);
> + return 0;
> + }
> +
> + if (tmp.quirk_variant > ARRAY_SIZE(bootirq_quirk_func) +
> + MAX_QUIRK_BOOTIRQ_REROUTE_VARIANTS) {
> + printk(KERN_INFO "PCI quirk: no such quirk function: "
> + "%d\n", tmp.quirk_variant);
> + return 0;
> + }
> +
> + __start_bc_pci_fixups_early[i].vendor = tmp.vendor;
> + __start_bc_pci_fixups_early[i].device = tmp.device;
> + __start_bc_pci_fixups_early[i].hook =
> + bootirq_quirk_func[tmp.quirk_variant -
> + (MAX_QUIRK_BOOTIRQ_REROUTE_VARIANTS + 1)];
> + } else {
> + for (i = 0; i < MAX_QUIRK_BOOTIRQ_REROUTE_DEVS; i++) {
> + if (quirk_bootirq_reroute_devs[i].vendor == 0)
> + break;
> +
> + if (quirk_bootirq_reroute_devs[i].vendor == tmp.vendor &&
> + quirk_bootirq_reroute_devs[i].device == tmp.device)
> + return 1; /* already in array */
> + }
> +
> + if (i >= MAX_QUIRK_BOOTIRQ_REROUTE_DEVS) {
> + printk(KERN_INFO "PCI quirk: too many reroute entries when "
> + "trying to add 0x%04x:0x%04x\n",
> + tmp.vendor, tmp.device);
> + return 0;
> + }
> +
> + quirk_bootirq_reroute_devs[i].vendor = tmp.vendor;
> + quirk_bootirq_reroute_devs[i].device = tmp.device;
> + quirk_bootirq_reroute_devs[i].quirk_variant = tmp.quirk_variant;
> +
> + reroute_to_boot_interrupts = 1;
> + }
> +
> + printk(KERN_INFO "PCI quirk: reroute interrupts for 0x%04x:0x%04x\n",
> + tmp.vendor, tmp.device);
> + return 1;
> +}
> +
> +/* bootirqquirk=0x<vendor>,0x<device>,<quirk_type> */
> +__setup("bootirqquirk=", bootirqquirk_setup);
> +
> #endif /* CONFIG_X86_IO_APIC */
>
> /*
> @@ -1773,6 +1880,17 @@ void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
> return;
> }
> pci_do_fixups(dev, start, end);
> +
> + switch(pass) {
> + case pci_fixup_early:
> + start = __start_bc_pci_fixups_early;
> + end = __end_bc_pci_fixups_early;
> + break;
> +
> + default:
> + return;
> + }
> + pci_do_fixups(dev, start, end);
> }
> EXPORT_SYMBOL(pci_fixup_device);
>
> --
> 1.5.2.4
>
> --
> Olaf Dabrunz (od/odabrunz), SUSE Linux Products GmbH, N??rnberg
>
--
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