From: Tomasz Nowicki <tn@semihalf.com>
To: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net,
rjw@rjwysocki.net, bhelgaas@google.com,
lorenzo.pieralisi@arm.com, robert.richter@caviumnetworks.com,
shijie.huang@arm.com, Suravee.Suthikulpanit@amd.com,
hanjun.guo@linaro.org
Cc: al.stone@linaro.org, mw@semihalf.com, graeme.gregory@linaro.org,
Catalin.Marinas@arm.com, will.deacon@arm.com,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, ddaney.cavm@gmail.com,
okaya@codeaurora.org, andrea.gallo@linaro.org,
linux-pci@vger.kernel.org, Tomasz Nowicki <tn@semihalf.com>
Subject: [PATCH V7 8/8] irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization
Date: Mon, 20 Jun 2016 13:02:21 +0200 [thread overview]
Message-ID: <1466420541-20101-9-git-send-email-tn@semihalf.com> (raw)
In-Reply-To: <1466420541-20101-1-git-send-email-tn@semihalf.com>
Let ACPI build ITS PCI MSI domain. ACPI code is responsible for retrieving
inner domain token and passing it on to its_pci_msi_init_one generic
init call.
IORT maintains list of registered domain tokens and allows to find
corresponding domain based on MADT ITS subtable ID info.
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/irq-gic-v3-its-pci-msi.c | 44 ++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/drivers/irqchip/irq-gic-v3-its-pci-msi.c b/drivers/irqchip/irq-gic-v3-its-pci-msi.c
index d2c2496..ae7221c 100644
--- a/drivers/irqchip/irq-gic-v3-its-pci-msi.c
+++ b/drivers/irqchip/irq-gic-v3-its-pci-msi.c
@@ -15,6 +15,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <linux/iort.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_irq.h>
@@ -144,9 +145,52 @@ static int __init its_pci_of_msi_init(void)
return 0;
}
+#ifdef CONFIG_ACPI
+
+static int __init
+its_pci_msi_parse_madt(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+ struct acpi_madt_generic_translator *its_entry;
+ struct fwnode_handle *dom_handle;
+ const char *node_name;
+ int err = -ENXIO;
+
+ its_entry = (struct acpi_madt_generic_translator *)header;
+ node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx",
+ (long)its_entry->base_address);
+ dom_handle = iort_find_domain_token(its_entry->translation_id);
+ if (!dom_handle) {
+ pr_err("%s: Unable to locate ITS domain handle\n", node_name);
+ goto out;
+ }
+
+ err = its_pci_msi_init_one(dom_handle, node_name);
+ if (!err)
+ pr_info("PCI/MSI: %s domain created\n", node_name);
+
+out:
+ kfree(node_name);
+ return err;
+}
+
+static int __init its_pci_acpi_msi_init(void)
+{
+ acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR,
+ its_pci_msi_parse_madt, 0);
+ return 0;
+}
+#else
+static int __init its_pci_acpi_msi_init(void)
+{
+ return 0;
+}
+#endif
+
static int __init its_pci_msi_init(void)
{
its_pci_of_msi_init();
+ its_pci_acpi_msi_init();
return 0;
}
--
1.9.1
next prev parent reply other threads:[~2016-06-20 11:05 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-20 11:02 [PATCH V7 0/8] Introduce ACPI world to ITS irqchip Tomasz Nowicki
2016-06-20 11:02 ` [PATCH V7 1/8] ACPI: I/O Remapping Table (IORT) initial support Tomasz Nowicki
2016-06-21 7:12 ` Hanjun Guo
2016-06-22 10:50 ` Marc Zyngier
2016-06-22 11:06 ` Tomasz Nowicki
2016-06-22 12:03 ` Marc Zyngier
2016-06-21 11:23 ` Lorenzo Pieralisi
2016-06-21 17:36 ` Lorenzo Pieralisi
2016-06-22 12:35 ` Tomasz Nowicki
2016-06-22 12:40 ` Tomasz Nowicki
2016-06-22 13:25 ` Marc Zyngier
2016-06-22 13:52 ` Tomasz Nowicki
2016-06-22 14:51 ` Marc Zyngier
2016-06-23 1:34 ` Hanjun Guo
2016-07-26 13:19 ` Christopher Covington
2016-07-26 14:48 ` Marc Zyngier
2016-06-20 11:02 ` [PATCH V7 2/8] ACPI: Add new IORT functions to support MSI domain handling Tomasz Nowicki
2016-06-21 7:28 ` Hanjun Guo
2016-06-20 11:02 ` [PATCH V7 3/8] PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table Tomasz Nowicki
2016-06-21 7:33 ` Hanjun Guo
2016-07-19 21:42 ` Bjorn Helgaas
2016-06-20 11:02 ` [PATCH V7 4/8] irqchip/gicv3-its: Cleanup for ITS domain initialization Tomasz Nowicki
2016-06-21 7:44 ` Hanjun Guo
2016-06-20 11:02 ` [PATCH V7 5/8] irqchip/gicv3-its: Refactor ITS DT init code to prepare for ACPI Tomasz Nowicki
2016-06-20 11:02 ` [PATCH V7 6/8] irqchip/gicv3-its: Probe ITS in the ACPI way Tomasz Nowicki
2016-06-21 8:03 ` Hanjun Guo
2016-06-20 11:02 ` [PATCH V7 7/8] irqchip/gicv3-its: Factor out code that might be reused for ACPI Tomasz Nowicki
2016-06-20 11:02 ` Tomasz Nowicki [this message]
2016-06-21 8:19 ` [PATCH V7 8/8] irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization Hanjun Guo
2016-06-20 17:31 ` [PATCH V7 0/8] Introduce ACPI world to ITS irqchip Shanker Donthineni
2016-06-24 11:04 ` Tomasz Nowicki
2016-08-09 10:45 ` Robert Richter
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