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Date: Thu, 4 Jan 2007 12:19:12 -0500
From: Len Brown <lenb@...nel.org>
To: John Keller <jpk@....com>
Cc: linux-acpi@...r.kernel.org, ayoung@....com, jes@....com,
linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] - Altix: ACPI _PRT support
Applied.
thanks,
-Len
On Friday 22 December 2006 12:50, John Keller wrote:
> Provide ACPI _PRT support for SN Altix systems.
>
> The SN Altix platform does not conform to the
> IOSAPIC IRQ routing model, so a new acpi_irq_model
> (ACPI_IRQ_MODEL_PLATFORM) has been defined. The SN
> platform specific code sets acpi_irq_model to
> this new value, and keys off of it in acpi_register_gsi()
> to avoid the iosapic code path.
>
> Signed-off-by: John Keller <jpk@....com>
> ---
>
> To avoid future regression/backward compatibilty issues
> when _PRT support is added to our PROM, we'd like to
> see this pushed into 2.6.20, if at all possible.
>
>
> arch/ia64/kernel/acpi.c | 3 +++
> arch/ia64/sn/kernel/io_acpi_init.c | 3 +++
> drivers/acpi/bus.c | 3 +++
> include/linux/acpi.h | 1 +
> 4 files changed, 10 insertions(+)
>
>
> Index: linux/arch/ia64/kernel/acpi.c
> ===================================================================
> --- linux.orig/arch/ia64/kernel/acpi.c 2006-10-24 02:38:54.000000000 -0500
> +++ linux/arch/ia64/kernel/acpi.c 2006-12-22 10:54:36.930343639 -0600
> @@ -590,6 +590,9 @@ void __init acpi_numa_arch_fixup(void)
> */
> int acpi_register_gsi(u32 gsi, int triggering, int polarity)
> {
> + if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
> + return gsi;
> +
> if (has_8259 && gsi < 16)
> return isa_irq_to_vector(gsi);
>
> Index: linux/arch/ia64/sn/kernel/io_acpi_init.c
> ===================================================================
> --- linux.orig/arch/ia64/sn/kernel/io_acpi_init.c 2006-12-21 00:51:59.000000000 -0600
> +++ linux/arch/ia64/sn/kernel/io_acpi_init.c 2006-12-22 10:53:45.504213484 -0600
> @@ -223,6 +223,9 @@ sn_io_acpi_init(void)
> u64 result;
> s64 status;
>
> + /* SN Altix does not follow the IOSAPIC IRQ routing model */
> + acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
> +
> acpi_bus_register_driver(&acpi_sn_hubdev_driver);
> status = sal_ioif_init(&result);
> if (status || result)
> Index: linux/drivers/acpi/bus.c
> ===================================================================
> --- linux.orig/drivers/acpi/bus.c 2006-08-28 20:40:10.000000000 -0500
> +++ linux/drivers/acpi/bus.c 2006-12-22 10:52:32.155474439 -0600
> @@ -561,6 +561,9 @@ static int __init acpi_bus_init_irq(void
> case ACPI_IRQ_MODEL_IOSAPIC:
> message = "IOSAPIC";
> break;
> + case ACPI_IRQ_MODEL_PLATFORM:
> + message = "platform specific model";
> + break;
> default:
> printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
> return -ENODEV;
> Index: linux/include/linux/acpi.h
> ===================================================================
> --- linux.orig/include/linux/acpi.h 2006-10-24 02:38:54.000000000 -0500
> +++ linux/include/linux/acpi.h 2006-12-22 10:52:53.337997675 -0600
> @@ -47,6 +47,7 @@ enum acpi_irq_model_id {
> ACPI_IRQ_MODEL_PIC = 0,
> ACPI_IRQ_MODEL_IOAPIC,
> ACPI_IRQ_MODEL_IOSAPIC,
> + ACPI_IRQ_MODEL_PLATFORM,
> ACPI_IRQ_MODEL_COUNT
> };
>
> -
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