From: grant.likely@linaro.org (Grant Likely)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 11/17] ARM64 / ACPI: Introduce ACPI_IRQ_MODEL_GIC and register device's gsi
Date: Thu, 11 Sep 2014 12:08:46 +0100 [thread overview]
Message-ID: <20140911110846.D152DC408F0@trevor.secretlab.ca> (raw)
In-Reply-To: <1409583475-6978-12-git-send-email-hanjun.guo@linaro.org>
On Mon, 1 Sep 2014 22:57:49 +0800, Hanjun Guo <hanjun.guo@linaro.org> wrote:
> Introduce ACPI_IRQ_MODEL_GIC which is needed for ARM64 as GIC is
> used, and then register device's gsi with the core IRQ subsystem.
>
> acpi_register_gsi() is similar to DT based irq_of_parse_and_map(),
> since gsi is unique in the system, so use hwirq number directly
> for the mapping.
>
> Originally-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
> ---
> arch/arm64/kernel/acpi.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++
> drivers/acpi/bus.c | 3 ++
> include/linux/acpi.h | 1 +
> 3 files changed, 77 insertions(+)
>
> diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
> index 35dff11..354b912 100644
> --- a/arch/arm64/kernel/acpi.c
> +++ b/arch/arm64/kernel/acpi.c
> @@ -37,6 +37,12 @@ EXPORT_SYMBOL(acpi_pci_disabled);
> static int enabled_cpus; /* Processors (GICC) with enabled flag in MADT */
>
> /*
> + * Since we're on ARM, the default interrupt routing model
> + * clearly has to be GIC.
> + */
> +enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_GIC;
> +
> +/*
> * __acpi_map_table() will be called before page_init(), so early_ioremap()
> * or early_memremap() should be called here to for ACPI table mapping.
> */
> @@ -194,6 +200,73 @@ void __init acpi_smp_init_cpus(void)
> pr_info("%d CPUs enabled, %d CPUs total\n", enabled_cpus, total_cpus);
> }
>
> +int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
> +{
> + *irq = irq_find_mapping(NULL, gsi);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
Why is this exported? x86 exports it, but ia64 does not. There aren't
very many callers, and none of them can be built as a module AFAICS.
> +
> +/*
> + * success: return IRQ number (>0)
> + * failure: return =< 0
> + */
> +int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
> +{
> + unsigned int irq;
> + unsigned int irq_type;
> +
> + /*
> + * ACPI have no bindings to indicate SPI or PPI, so we
> + * use different mappings from DT in ACPI.
> + *
> + * For FDT
> + * PPI interrupt: in the range [0, 15];
> + * SPI interrupt: in the range [0, 987];
> + *
> + * For ACPI, GSI should be unique so using
> + * the hwirq directly for the mapping:
> + * PPI interrupt: in the range [16, 31];
> + * SPI interrupt: in the range [32, 1019];
> + */
Hmmm, so doing it this way means that DT systems will have a different
irq_domain setup compared with ACPI systems. I'm not convinced we want
to do that, but I need to look at the code that sets up the new domains
before I comment further...
g.
next prev parent reply other threads:[~2014-09-11 11:08 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-01 14:57 [PATCH v3 00/17] Introduce ACPI for ARM64 based on ACPI 5.1 Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 01/17] ARM64: Move the init of cpu_logical_map(0) before unflatten_device_tree() Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 02/17] ARM64 / ACPI: Get RSDP and ACPI boot-time tables Hanjun Guo
2014-09-09 16:26 ` Catalin Marinas
2014-09-09 16:41 ` Jon Masters
2014-09-09 16:44 ` Jon Masters
2014-09-09 17:15 ` Mark Rutland
2014-09-09 17:33 ` Jon Masters
2014-09-09 17:50 ` Lorenzo Pieralisi
2014-09-09 18:05 ` Sudeep Holla
2014-09-09 19:06 ` Jon Masters
2014-09-10 11:13 ` Hanjun Guo
2014-09-10 12:33 ` Catalin Marinas
2014-09-10 21:51 ` Grant Likely
2014-09-11 11:01 ` Catalin Marinas
2014-09-14 15:40 ` Grant Likely
2014-09-14 21:59 ` Catalin Marinas
2014-09-15 3:53 ` Grant Likely
2014-09-16 5:29 ` Zheng, Lv
2014-09-10 21:41 ` Grant Likely
2014-09-09 16:54 ` Mark Rutland
2014-09-10 7:30 ` Hanjun Guo
2014-09-10 21:37 ` Grant Likely
2014-09-01 14:57 ` [PATCH v3 03/17] ARM64 / ACPI: Introduce lowlevel suspend function Hanjun Guo
2014-09-09 16:35 ` Catalin Marinas
2014-09-09 22:04 ` Graeme Gregory
2014-09-01 14:57 ` [PATCH v3 04/17] ARM64 / ACPI: Introduce early_param for "acpi" Hanjun Guo
2014-09-09 16:37 ` Catalin Marinas
2014-09-09 17:17 ` Bjorn Helgaas
2014-09-09 22:14 ` Jon Masters
2014-09-10 13:04 ` Will Deacon
2014-09-10 13:21 ` Bjorn Helgaas
2014-09-10 18:30 ` Will Deacon
2014-09-10 21:58 ` Grant Likely
2014-09-01 14:57 ` [PATCH v3 05/17] ARM64 / ACPI: If we chose to boot from acpi then disable FDT Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 06/17] ARM64 / ACPI: Make PCI optional for ACPI on ARM64 Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 07/17] ARM64 / ACPI: Parse FADT table to get PSCI flags for PSCI init Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 08/17] ACPI / table: Print GIC information when MADT is parsed Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 09/17] ARM64 / ACPI: Parse MADT for SMP initialization Hanjun Guo
2014-09-03 17:21 ` Lorenzo Pieralisi
2014-09-04 15:29 ` Hanjun Guo
2014-09-09 4:29 ` Jon Masters
2014-09-09 5:11 ` Hanjun Guo
2014-09-09 5:34 ` Jon Masters
2014-09-09 16:52 ` Lorenzo Pieralisi
2014-09-09 17:00 ` Jon Masters
2014-09-09 17:02 ` Jon Masters
2014-09-09 4:23 ` Jon Masters
2014-09-09 4:57 ` Hanjun Guo
2014-09-09 5:44 ` Jon Masters
2014-09-09 16:00 ` Hanjun Guo
2014-09-09 16:04 ` Jon Masters
2014-09-09 16:14 ` Hanjun Guo
2014-09-11 14:15 ` Will Deacon
2014-09-12 21:30 ` Jon Masters
2014-09-11 10:24 ` Grant Likely
2014-09-01 14:57 ` [PATCH v3 10/17] ACPI / processor: Make it possible to get CPU hardware ID via GICC Hanjun Guo
2014-09-03 16:27 ` Lorenzo Pieralisi
2014-09-08 13:10 ` Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 11/17] ARM64 / ACPI: Introduce ACPI_IRQ_MODEL_GIC and register device's gsi Hanjun Guo
2014-09-11 11:08 ` Grant Likely [this message]
2014-09-11 11:34 ` Grant Likely
2014-09-12 9:42 ` Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 12/17] ACPI / table: Add new function to get table entries Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 13/17] ARM64 / ACPI: Add GICv2 specific ACPI boot support Hanjun Guo
2014-09-01 17:35 ` Marc Zyngier
2014-09-02 8:28 ` [Linaro-acpi] " Alexander Spyridakis
2014-09-02 11:48 ` Tomasz Nowicki
2014-09-02 13:02 ` Marc Zyngier
2014-09-02 15:45 ` Hanjun Guo
2014-09-02 15:59 ` Marc Zyngier
2014-09-02 16:11 ` Sudeep Holla
2014-09-03 10:30 ` Marc Zyngier
2014-09-03 11:17 ` Hanjun Guo
2014-09-04 14:03 ` Hanjun Guo
2014-09-09 6:21 ` Jon Masters
2014-09-03 9:26 ` Tomasz Nowicki
2014-09-03 14:57 ` Arnd Bergmann
2014-09-05 8:52 ` Tomasz Nowicki
2014-09-05 9:47 ` Marc Zyngier
2014-09-05 10:13 ` [Linaro-acpi] " Arnd Bergmann
2014-09-05 10:36 ` Tomasz Nowicki
2014-09-05 10:39 ` Marc Zyngier
2014-09-05 10:49 ` Tomasz Nowicki
2014-09-09 6:27 ` Jon Masters
2014-09-11 13:43 ` Grant Likely
2014-09-02 16:34 ` Catalin Marinas
2014-09-11 11:48 ` Grant Likely
2014-09-11 12:01 ` Marc Zyngier
2014-09-09 6:14 ` Jon Masters
2014-09-03 18:42 ` Arnd Bergmann
2014-09-04 10:10 ` Tomasz Nowicki
2014-09-04 10:14 ` Arnd Bergmann
2014-09-04 10:39 ` Tomasz Nowicki
2014-09-09 6:35 ` Jon Masters
2014-09-01 14:57 ` [PATCH v3 14/17] ARM64 / ACPI: Parse GTDT to initialize arch timer Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 15/17] ARM64 / ACPI: Select ACPI_REDUCED_HARDWARE_ONLY if ACPI is enabled on ARM64 Hanjun Guo
2014-09-01 14:57 ` [PATCH v3 16/17] ARM64 / ACPI: Enable ARM64 in Kconfig Hanjun Guo
2014-09-11 15:18 ` Lorenzo Pieralisi
2014-09-01 14:57 ` [PATCH v3 17/17] Documentation: ACPI for ARM64 Hanjun Guo
2014-09-11 13:29 ` [PATCH v3 00/17] Introduce ACPI for ARM64 based on ACPI 5.1 Grant Likely
2014-09-11 13:49 ` Will Deacon
2014-09-12 21:38 ` Jon Masters
2014-09-12 21:43 ` Jon Masters
2014-09-15 4:21 ` Grant Likely
2014-09-11 14:23 ` Rafael J. Wysocki
2014-09-11 14:04 ` Grant Likely
2014-09-11 15:37 ` Catalin Marinas
2014-09-11 15:57 ` Sudeep Holla
2014-09-11 16:06 ` Graeme Gregory
2014-09-11 16:14 ` Sudeep Holla
2014-09-15 4:31 ` Grant Likely
2014-09-15 9:15 ` Catalin Marinas
2014-09-15 22:48 ` Grant Likely
2014-09-16 10:12 ` Catalin Marinas
2014-09-11 16:05 ` Olof Johansson
2014-09-15 4:37 ` Grant Likely
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