Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753005AbaJYVvQ (ORCPT ); Sat, 25 Oct 2014 17:51:16 -0400 Received: from inca-roads.misterjones.org ([213.251.177.50]:46060 "EHLO inca-roads.misterjones.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752975AbaJYVvN (ORCPT ); Sat, 25 Oct 2014 17:51:13 -0400 From: Marc Zyngier To: Abhijeet Dharmapurikar , Phong Vo , Linus Walleij , Tin Huynh , Y Vo , Thomas Gleixner , Toan Le , Bjorn Andersson , Arnd Bergmann Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/3] irqchip: GICv3: Add support for irq_{get,set}_irqchip_state Date: Sat, 25 Oct 2014 11:14:57 +0100 Message-Id: <1414232097-4328-4-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1414232097-4328-1-git-send-email-marc.zyngier@arm.com> References: <1414232097-4328-1-git-send-email-marc.zyngier@arm.com> X-SA-Exim-Connect-IP: 90.219.10.17 X-SA-Exim-Rcpt-To: adharmap@codeaurora.org, pvo@apm.com, linus.walleij@linaro.org, tnhuynh@apm.com, yvo@apm.com, tglx@linutronix.de, toanle@apm.com, bjorn@kryo.se, arnd@arndb.de, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-SA-Exim-Mail-From: marc.zyngier@arm.com X-SA-Exim-Scanned: No (on cheepnis.misterjones.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the required hooks for the internal state of an interrupt to be exposed to other subsystems. Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3.c | 78 ++++++++++++++++++++++++++++++++++++-------- 1 file changed, 65 insertions(+), 13 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index aa17ae8..666c14e 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -193,6 +193,19 @@ static void gic_enable_redist(bool enable) /* * Routines to disable, enable, EOI and route interrupts */ +static int gic_peek_irq(struct irq_data *d, u32 offset) +{ + u32 mask = 1 << (gic_irq(d) % 32); + void __iomem *base; + + if (gic_irq_in_rdist(d)) + base = gic_data_rdist_sgi_base(); + else + base = gic_data.dist_base; + + return !!(readl_relaxed(base + offset + (gic_irq(d) / 32) * 4) & mask); +} + static void gic_poke_irq(struct irq_data *d, u32 offset) { u32 mask = 1 << (gic_irq(d) % 32); @@ -221,6 +234,56 @@ static void gic_unmask_irq(struct irq_data *d) gic_poke_irq(d, GICD_ISENABLER); } +static void gic_irq_set_irqchip_state(struct irq_data *d, int state, int val) +{ + u32 reg; + + switch (state) { + case IRQCHIP_STATE_PENDING: + reg = val ? GICD_ISPENDR : GICD_ICPENDR; + break; + + case IRQCHIP_STATE_ACTIVE: + reg = val ? GICD_ISACTIVER : GICD_ICACTIVER; + break; + + case IRQCHIP_STATE_MASKED: + reg = val ? GICD_ICENABLER : GICD_ISENABLER; + break; + + default: + WARN_ON(1); + return; + } + + gic_poke_irq(d, reg); +} + +static int gic_irq_get_irqchip_state(struct irq_data *d, int state) +{ + int val; + + switch (state) { + case IRQCHIP_STATE_PENDING: + val = gic_peek_irq(d, GICD_ISPENDR); + break; + + case IRQCHIP_STATE_ACTIVE: + val = gic_peek_irq(d, GICD_ISACTIVER); + break; + + case IRQCHIP_STATE_MASKED: + val = !gic_peek_irq(d, GICD_ISENABLER); + break; + + default: + WARN_ON(1); + val = 0; + } + + return val; +} + static void gic_eoi_irq(struct irq_data *d) { gic_write_eoir(gic_irq(d)); @@ -404,19 +467,6 @@ static void gic_cpu_init(void) } #ifdef CONFIG_SMP -static int gic_peek_irq(struct irq_data *d, u32 offset) -{ - u32 mask = 1 << (gic_irq(d) % 32); - void __iomem *base; - - if (gic_irq_in_rdist(d)) - base = gic_data_rdist_sgi_base(); - else - base = gic_data.dist_base; - - return !!(readl_relaxed(base + offset + (gic_irq(d) / 32) * 4) & mask); -} - static int gic_secondary_init(struct notifier_block *nfb, unsigned long action, void *hcpu) { @@ -583,6 +633,8 @@ static struct irq_chip gic_chip = { .irq_eoi = gic_eoi_irq, .irq_set_type = gic_set_type, .irq_set_affinity = gic_set_affinity, + .irq_get_irqchip_state = gic_irq_get_irqchip_state, + .irq_set_irqchip_state = gic_irq_set_irqchip_state, }; static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq, -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/