From: Benjamin Herrenschmidt <benh@kernel•crashing.org>
To: linuxppc-dev@ozlabs•org
Subject: [PATCH 17/21] powerpc/powernv: Register and handle OPAL interrupts
Date: Sat, 10 Sep 2011 11:20:04 -0300 [thread overview]
Message-ID: <1315664408-16797-17-git-send-email-benh@kernel.crashing.org> (raw)
In-Reply-To: <1315664408-16797-1-git-send-email-benh@kernel.crashing.org>
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 <benh@kernel•crashing.org>
---
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 <linux/types.h>
#include <linux/of.h>
#include <linux/of_platform.h>
+#include <linux/interrupt.h>
#include <asm/opal.h>
#include <asm/firmware.h>
@@ -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
next prev parent reply other threads:[~2011-09-10 15:59 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-10 14:19 [PATCH 01/21] powerpc/udbg: Fix Kconfig entry for avoiding 44x early debug with KVM Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 02/21] powerpc/smp: More generic support for "soft hotplug" Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 03/21] powerpc/pci: Call pcie_bus_configure_settings() Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 04/21] tty/hvc/hvsi_lib: Updates for running under OPAL v2 Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 05/21] powerpc/powernv: Don't clobber r9 in relative_toc() Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 06/21] powerpc: Add skeleton PowerNV platform Benjamin Herrenschmidt
2011-09-12 1:17 ` Michael Neuling
2011-09-12 6:02 ` Geert Uytterhoeven
2011-09-10 14:19 ` [PATCH 07/21] of: Change logic to overwrite cmd_line with CONFIG_CMDLINE Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 08/21] powerpc/powernv: Add CPU hotplug support Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 09/21] powerpc/powernv: Add OPAL takeover from PowerVM Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 10/21] powerpc/powernv: Get kernel command line accross OPAL takeover Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 11/21] powerpc/powernv: Basic support for OPAL Benjamin Herrenschmidt
2011-09-10 14:19 ` [PATCH 12/21] powerpc/powernv: Add support for instanciating OPAL v2 from Open Firmware Benjamin Herrenschmidt
2011-09-10 14:20 ` [PATCH 13/21] powerpc/powernv: Support for OPAL console Benjamin Herrenschmidt
2011-09-10 14:20 ` [PATCH 14/21] powerpc/powernv: Hookup reboot and poweroff functions Benjamin Herrenschmidt
2011-09-10 14:20 ` [PATCH 15/21] powerpc/powernv: Add RTC and NVRAM support plus RTAS fallbacks Benjamin Herrenschmidt
2011-09-10 14:20 ` [PATCH 16/21] powerpc/powernv: Add OPAL ICS backend Benjamin Herrenschmidt
2011-09-10 14:20 ` Benjamin Herrenschmidt [this message]
2011-09-10 14:20 ` [PATCH 18/21] powerpc/powernv: Machine check and other system interrupts Benjamin Herrenschmidt
2011-09-10 14:20 ` [PATCH 19/21] powerpc/powernv: Add support for p5ioc2 PCI-X and PCIe Benjamin Herrenschmidt
2011-09-10 14:20 ` [PATCH 20/21] powerpc/powernv: Implement MSI support for p5ioc2 PCIe Benjamin Herrenschmidt
2011-09-10 14:20 ` [PATCH 21/21] powerpc/powernv: Handle PCI-X/PCIe reset delay Benjamin Herrenschmidt
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