From: Tomasz Nowicki <tn@semihalf.com>
To: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net,
rjw@rjwysocki.net, helgaas@kernel.org, rafael@kernel.org,
Lorenzo.Pieralisi@arm.com
Cc: will.deacon@arm.com, catalin.marinas@arm.com,
hanjun.guo@linaro.org, shijie.huang@arm.com,
robert.richter@caviumnetworks.com, mw@semihalf.com,
linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linaro-acpi@lists.linaro.org, andrea.gallo@linaro.org,
linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
al.stone@linaro.org, graeme.gregory@linaro.org,
ddaney.cavm@gmail.com, okaya@codeaurora.org,
Tomasz Nowicki <tn@semihalf.com>
Subject: [PATCH V10 8/8] irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization
Date: Tue, 6 Sep 2016 11:08:58 +0200 [thread overview]
Message-ID: <1473152938-17388-9-git-send-email-tn@semihalf.com> (raw)
In-Reply-To: <1473152938-17388-1-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>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
---
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..aee1c60 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/acpi_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
prev parent reply other threads:[~2016-09-06 9:09 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-06 9:08 [PATCH V10 0/8] Introduce ACPI world to ITS irqchip Tomasz Nowicki
2016-09-06 9:08 ` [PATCH V10 1/8] ACPI: I/O Remapping Table (IORT) initial support Tomasz Nowicki
2016-09-07 11:56 ` [UPDATE PATCH " Tomasz Nowicki
2016-09-08 13:59 ` Lorenzo Pieralisi
2016-09-09 9:20 ` Lorenzo Pieralisi
2016-09-12 12:37 ` Tomasz Nowicki
2016-09-12 13:04 ` Marc Zyngier
2016-09-12 13:43 ` Rafael J. Wysocki
2016-09-09 3:09 ` [PATCH " Dennis Chen
2016-09-09 8:45 ` Lorenzo Pieralisi
2016-09-06 9:08 ` [PATCH V10 2/8] ACPI: Add new IORT functions to support MSI domain handling Tomasz Nowicki
2016-09-06 10:20 ` Thomas Gleixner
2016-09-06 10:27 ` Tomasz Nowicki
2016-09-07 10:35 ` Tomasz Nowicki
2016-09-07 11:32 ` Rafael J. Wysocki
2016-09-07 11:58 ` [UPDATE PATCH " Tomasz Nowicki
2016-09-07 13:01 ` Tomasz Nowicki
2016-09-06 9:08 ` [PATCH V10 3/8] PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table Tomasz Nowicki
2016-09-06 9:08 ` [PATCH V10 4/8] irqchip/gicv3-its: Cleanup for ITS domain initialization Tomasz Nowicki
2016-09-06 9:08 ` [PATCH V10 5/8] irqchip/gicv3-its: Refactor ITS DT init code to prepare for ACPI Tomasz Nowicki
2016-09-06 9:08 ` [PATCH V10 6/8] irqchip/gicv3-its: Probe ITS in the ACPI way Tomasz Nowicki
2016-09-06 9:08 ` [PATCH V10 7/8] irqchip/gicv3-its: Factor out PCI-MSI part that might be reused for ACPI Tomasz Nowicki
2016-09-06 9:50 ` Thomas Gleixner
2016-09-06 10:22 ` Tomasz Nowicki
2016-09-06 11:29 ` Rafael J. Wysocki
2016-09-07 7:49 ` Tomasz Nowicki
2016-09-06 9:08 ` Tomasz Nowicki [this message]
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