linux-kernel - [PATCH v3 4/5] irqchip: qcom-pdc: Introduce irq_set

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1592818308-23001-5-git-send-email-mkshah@codeaurora.org>
Date:   Mon, 22 Jun 2020 15:01:47 +0530
From:   Maulik Shah <mkshah@...eaurora.org>
To:     bjorn.andersson@...aro.org, maz@...nel.org,
        linus.walleij@...aro.org, swboyd@...omium.org,
        evgreen@...omium.org, mka@...omium.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-gpio@...r.kernel.org, agross@...nel.org, tglx@...utronix.de,
        jason@...edaemon.net, dianders@...omium.org, rnayak@...eaurora.org,
        ilina@...eaurora.org, lsrao@...eaurora.org,
        Maulik Shah <mkshah@...eaurora.org>
Subject: [PATCH v3 4/5] irqchip: qcom-pdc: Introduce irq_set_wake call

Remove irq_disable callback to allow lazy disable for pdc interrupts.

Add irq_set_wake callback that unmask interrupt in HW when drivers
mark interrupt for wakeup. Interrupt will be cleared in HW during
lazy disable if its not marked for wakeup.

Signed-off-by: Maulik Shah <mkshah@...eaurora.org>
---
 drivers/irqchip/qcom-pdc.c | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c
index 6ae9e1f..8beb6f7 100644
--- a/drivers/irqchip/qcom-pdc.c
+++ b/drivers/irqchip/qcom-pdc.c
@@ -36,6 +36,7 @@ struct pdc_pin_region {
 	u32 cnt;
 };
 
+static DECLARE_BITMAP(pdc_wake_irqs, PDC_MAX_IRQS);
 static DEFINE_RAW_SPINLOCK(pdc_lock);
 static void __iomem *pdc_base;
 static struct pdc_pin_region *pdc_region;
@@ -87,22 +88,17 @@ static void pdc_enable_intr(struct irq_data *d, bool on)
 	raw_spin_unlock(&pdc_lock);
 }
 
-static void qcom_pdc_gic_disable(struct irq_data *d)
+static int qcom_pdc_gic_set_wake(struct irq_data *d, unsigned int on)
 {
-	if (d->hwirq == GPIO_NO_WAKE_IRQ)
-		return;
-
-	pdc_enable_intr(d, false);
-	irq_chip_disable_parent(d);
-}
-
-static void qcom_pdc_gic_enable(struct irq_data *d)
-{
-	if (d->hwirq == GPIO_NO_WAKE_IRQ)
-		return;
+	if (on) {
+		pdc_enable_intr(d, true);
+		irq_chip_enable_parent(d);
+		set_bit(d->hwirq, pdc_wake_irqs);
+	} else {
+		clear_bit(d->hwirq, pdc_wake_irqs);
+	}
 
-	pdc_enable_intr(d, true);
-	irq_chip_enable_parent(d);
+	return irq_chip_set_wake_parent(d, on);
 }
 
 static void qcom_pdc_gic_mask(struct irq_data *d)
@@ -111,6 +107,9 @@ static void qcom_pdc_gic_mask(struct irq_data *d)
 		return;
 
 	irq_chip_mask_parent(d);
+
+	if (!test_bit(d->hwirq, pdc_wake_irqs))
+		pdc_enable_intr(d, false);
 }
 
 static void qcom_pdc_gic_unmask(struct irq_data *d)
@@ -118,6 +117,7 @@ static void qcom_pdc_gic_unmask(struct irq_data *d)
 	if (d->hwirq == GPIO_NO_WAKE_IRQ)
 		return;
 
+	pdc_enable_intr(d, true);
 	irq_chip_unmask_parent(d);
 }
 
@@ -197,15 +197,13 @@ static struct irq_chip qcom_pdc_gic_chip = {
 	.irq_eoi		= irq_chip_eoi_parent,
 	.irq_mask		= qcom_pdc_gic_mask,
 	.irq_unmask		= qcom_pdc_gic_unmask,
-	.irq_disable		= qcom_pdc_gic_disable,
-	.irq_enable		= qcom_pdc_gic_enable,
 	.irq_get_irqchip_state	= qcom_pdc_gic_get_irqchip_state,
 	.irq_set_irqchip_state	= qcom_pdc_gic_set_irqchip_state,
 	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 	.irq_set_type		= qcom_pdc_gic_set_type,
+	.irq_set_wake		= qcom_pdc_gic_set_wake,
 	.flags			= IRQCHIP_MASK_ON_SUSPEND |
-				  IRQCHIP_SET_TYPE_MASKED |
-				  IRQCHIP_SKIP_SET_WAKE,
+				  IRQCHIP_SET_TYPE_MASKED,
 	.irq_set_vcpu_affinity	= irq_chip_set_vcpu_affinity_parent,
 	.irq_set_affinity	= irq_chip_set_affinity_parent,
 };
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation