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From: Michal Simek <michal.simek@xilinx.com>
To: linux-kernel@vger.kernel.org, monstr@monstr.eu,
	michal.simek@xilinx.com, git@xilinx.com
Cc: Stefan Asserhall <stefan.asserhall@xilinx.com>,
	Jason Cooper <jason@lakedaemon.net>,
	Marc Zyngier <maz@kernel.org>, Mubin Sayyed <mubinusm@xilinx.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/3] irqchip: xilinx: Enable generic irq multi handler
Date: Wed, 12 Feb 2020 09:39:57 +0100	[thread overview]
Message-ID: <5813deafd27acf07b936ef7a2ac029b7a95ee7be.1581496793.git.michal.simek@xilinx.com> (raw)
In-Reply-To: <cover.1581496793.git.michal.simek@xilinx.com>

Register default arch handler via driver instead of directly pointing to
xilinx intc controller. This patch makes architecture code more generic.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Stefan Asserhall <stefan.asserhall@xilinx.com>
---

 arch/microblaze/Kconfig           |  1 +
 arch/microblaze/include/asm/irq.h |  3 ---
 arch/microblaze/kernel/irq.c      | 16 +---------------
 drivers/irqchip/irq-xilinx-intc.c | 22 +++++++++++++++++++++-
 4 files changed, 23 insertions(+), 19 deletions(-)

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 6a331bd57ea8..3a314aa2efa1 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -47,6 +47,7 @@ config MICROBLAZE
 	select CPU_NO_EFFICIENT_FFS
 	select MMU_GATHER_NO_RANGE if MMU
 	select SPARSE_IRQ
+	select GENERIC_IRQ_MULTI_HANDLER
 
 # Endianness selection
 choice
diff --git a/arch/microblaze/include/asm/irq.h b/arch/microblaze/include/asm/irq.h
index eac2fb4b3fb9..5166f0893e2b 100644
--- a/arch/microblaze/include/asm/irq.h
+++ b/arch/microblaze/include/asm/irq.h
@@ -14,7 +14,4 @@
 struct pt_regs;
 extern void do_IRQ(struct pt_regs *regs);
 
-/* should be defined in each interrupt controller driver */
-extern unsigned int xintc_get_irq(void);
-
 #endif /* _ASM_MICROBLAZE_IRQ_H */
diff --git a/arch/microblaze/kernel/irq.c b/arch/microblaze/kernel/irq.c
index 903dad822fad..1f8cb4c4f74f 100644
--- a/arch/microblaze/kernel/irq.c
+++ b/arch/microblaze/kernel/irq.c
@@ -20,27 +20,13 @@
 #include <linux/irqchip.h>
 #include <linux/of_irq.h>
 
-static u32 concurrent_irq;
-
 void __irq_entry do_IRQ(struct pt_regs *regs)
 {
-	unsigned int irq;
 	struct pt_regs *old_regs = set_irq_regs(regs);
 	trace_hardirqs_off();
 
 	irq_enter();
-	irq = xintc_get_irq();
-next_irq:
-	BUG_ON(!irq);
-	generic_handle_irq(irq);
-
-	irq = xintc_get_irq();
-	if (irq != -1U) {
-		pr_debug("next irq: %d\n", irq);
-		++concurrent_irq;
-		goto next_irq;
-	}
-
+	handle_arch_irq(regs);
 	irq_exit();
 	set_irq_regs(old_regs);
 	trace_hardirqs_on();
diff --git a/drivers/irqchip/irq-xilinx-intc.c b/drivers/irqchip/irq-xilinx-intc.c
index cf1bb470d7b5..ad9e678c24ac 100644
--- a/drivers/irqchip/irq-xilinx-intc.c
+++ b/drivers/irqchip/irq-xilinx-intc.c
@@ -125,7 +125,7 @@ static unsigned int xintc_get_irq_local(struct xintc_irq_chip *irqc)
 	return irq;
 }
 
-unsigned int xintc_get_irq(void)
+static unsigned int xintc_get_irq(void)
 {
 	u32 hwirq;
 	unsigned int irq = -1;
@@ -178,6 +178,25 @@ static void xil_intc_irq_handler(struct irq_desc *desc)
 	chained_irq_exit(chip, desc);
 }
 
+static u32 concurrent_irq;
+
+static void xil_intc_handle_irq(struct pt_regs *regs)
+{
+	unsigned int irq;
+
+	irq = xintc_get_irq();
+next_irq:
+	BUG_ON(!irq);
+	generic_handle_irq(irq);
+
+	irq = xintc_get_irq();
+	if (irq != -1U) {
+		pr_debug("next irq: %d\n", irq);
+		++concurrent_irq;
+		goto next_irq;
+	}
+}
+
 static int __init xilinx_intc_of_init(struct device_node *intc,
 					     struct device_node *parent)
 {
@@ -248,6 +267,7 @@ static int __init xilinx_intc_of_init(struct device_node *intc,
 	} else {
 		primary_intc = irqc;
 		irq_set_default_host(primary_intc->root_domain);
+		set_handle_irq(xil_intc_handle_irq);
 	}
 
 	return 0;
-- 
2.25.0


  parent reply	other threads:[~2020-02-12  8:40 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-12  8:39 [PATCH 0/3] irqchip: xilinx: Switch to generic domain handler Michal Simek
2020-02-12  8:39 ` [PATCH 1/3] irqchip: xilinx: Fill error code when irq domain registration fails Michal Simek
2020-02-12  8:39 ` Michal Simek [this message]
2020-02-21 11:45   ` [PATCH 2/3] irqchip: xilinx: Enable generic irq multi handler Marc Zyngier
2020-02-12  8:39 ` [PATCH 3/3] irqchip: xilinx: Use handle_domain_irq() Michal Simek
2020-02-21 11:46   ` Marc Zyngier
2020-02-21 11:49     ` Michal Simek
2020-02-21 10:36 ` [PATCH 0/3] irqchip: xilinx: Switch to generic domain handler Michal Simek

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