From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 35B57100E59 for ; Tue, 20 Sep 2011 13:46:09 +1000 (EST) From: Benjamin Herrenschmidt To: linuxppc-dev@ozlabs.org Subject: [PATCH 16/20] powerpc/powernv: Register and handle OPAL interrupts Date: Tue, 20 Sep 2011 13:45:03 +1000 Message-Id: <1316490307-28030-16-git-send-email-benh@kernel.crashing.org> In-Reply-To: <1316490307-28030-1-git-send-email-benh@kernel.crashing.org> References: <1316490307-28030-1-git-send-email-benh@kernel.crashing.org> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , We do the minimum which is to "pass" interrupts to HAL, which makes the console smoother and will allow us to implement interrupt based completion and console. Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/powernv/opal.c | 31 +++++++++++++++++++++++++++++++ 1 files changed, 31 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 7887733..5a598ca 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -135,9 +136,22 @@ int opal_put_chars(uint32_t vtermno, const char *data, int total_len) return written; } +static irqreturn_t opal_interrupt(int irq, void *data) +{ + uint64_t events; + + opal_handle_interrupt(virq_to_hw(irq), &events); + + /* XXX TODO: Do something with the events */ + + return IRQ_HANDLED; +} + static int __init opal_init(void) { struct device_node *np, *consoles; + const u32 *irqs; + int rc, i, irqlen; opal_node = of_find_node_by_path("/ibm,opal"); if (!opal_node) { @@ -156,6 +170,23 @@ static int __init opal_init(void) of_platform_device_create(np, NULL, NULL); } of_node_put(consoles); + + /* Find all OPAL interrupts and request them */ + irqs = of_get_property(opal_node, "opal-interrupts", &irqlen); + pr_debug("opal: Found %d interrupts reserved for OPAL\n", + irqs ? (irqlen / 4) : 0); + for (i = 0; irqs && i < (irqlen / 4); i++, irqs++) { + unsigned int hwirq = be32_to_cpup(irqs); + unsigned int irq = irq_create_mapping(NULL, hwirq); + if (irq == NO_IRQ) { + pr_warning("opal: Failed to map irq 0x%x\n", hwirq); + continue; + } + rc = request_irq(irq, opal_interrupt, 0, "opal", NULL); + if (rc) + pr_warning("opal: Error %d requesting irq %d" + " (0x%x)\n", rc, irq, hwirq); + } return 0; } subsys_initcall(opal_init); -- 1.7.4.1