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authorBogdan Purcareata <bogdan.purcareata@nxp.com>2018-02-05 17:07:43 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-22 17:11:30 +0300
commit7afe031c1a49c3630e39ec8d964334d0032fe6da (patch)
tree34be88bc9c3ec1b2ad06c5026e41d4b64f387bbb /drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
parent6bd067c48efed50ac0200c4a83a415bd524254e0 (diff)
downloadlinux-7afe031c1a49c3630e39ec8d964334d0032fe6da.tar.xz
staging: fsl-mc: Move irqchip code out of staging
Now that the fsl-mc bus core infrastructure is out of staging, the remaining irqchip glue code used (irq-gic-v3-its-fsl-mc-msi.c) goes to drivers/irqchip. Create new Kconfig option for irqchip code that depends on FSL_MC_BUS and ARM_GIC_V3_ITS. This ensures irqchip code only gets built on ARM64 platforms. We can now remove #ifdef GENERIC_MSI_DOMAIN_OPS as it was only needed for x86. Signed-off-by: Stuart Yoder <stuyoder@gmail.com> [rebased, add dpaa2_eth and dpio #include updates] Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> [rebased, split irqchip to separate patch] Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com> [add Kconfig dependency on ARM_GIC_V3_ITS] Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c')
-rw-r--r--drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c b/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
new file mode 100644
index 000000000000..13a5d9a1de96
--- /dev/null
+++ b/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Freescale Management Complex (MC) bus driver MSI support
+ *
+ * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
+ * Author: German Rivera <German.Rivera@freescale.com>
+ *
+ */
+
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/irq.h>
+#include <linux/msi.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/fsl/mc.h>
+
+static struct irq_chip its_msi_irq_chip = {
+ .name = "ITS-fMSI",
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_eoi = irq_chip_eoi_parent,
+ .irq_set_affinity = msi_domain_set_affinity
+};
+
+static int its_fsl_mc_msi_prepare(struct irq_domain *msi_domain,
+ struct device *dev,
+ int nvec, msi_alloc_info_t *info)
+{
+ struct fsl_mc_device *mc_bus_dev;
+ struct msi_domain_info *msi_info;
+
+ if (!dev_is_fsl_mc(dev))
+ return -EINVAL;
+
+ mc_bus_dev = to_fsl_mc_device(dev);
+ if (!(mc_bus_dev->flags & FSL_MC_IS_DPRC))
+ return -EINVAL;
+
+ /*
+ * Set the device Id to be passed to the GIC-ITS:
+ *
+ * NOTE: This device id corresponds to the IOMMU stream ID
+ * associated with the DPRC object (ICID).
+ */
+ info->scratchpad[0].ul = mc_bus_dev->icid;
+ msi_info = msi_get_domain_info(msi_domain->parent);
+ return msi_info->ops->msi_prepare(msi_domain->parent, dev, nvec, info);
+}
+
+static struct msi_domain_ops its_fsl_mc_msi_ops __ro_after_init = {
+ .msi_prepare = its_fsl_mc_msi_prepare,
+};
+
+static struct msi_domain_info its_fsl_mc_msi_domain_info = {
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
+ .ops = &its_fsl_mc_msi_ops,
+ .chip = &its_msi_irq_chip,
+};
+
+static const struct of_device_id its_device_id[] = {
+ { .compatible = "arm,gic-v3-its", },
+ {},
+};
+
+static int __init its_fsl_mc_msi_init(void)
+{
+ struct device_node *np;
+ struct irq_domain *parent;
+ struct irq_domain *mc_msi_domain;
+
+ for (np = of_find_matching_node(NULL, its_device_id); np;
+ np = of_find_matching_node(np, its_device_id)) {
+ if (!of_property_read_bool(np, "msi-controller"))
+ continue;
+
+ parent = irq_find_matching_host(np, DOMAIN_BUS_NEXUS);
+ if (!parent || !msi_get_domain_info(parent)) {
+ pr_err("%pOF: unable to locate ITS domain\n", np);
+ continue;
+ }
+
+ mc_msi_domain = fsl_mc_msi_create_irq_domain(
+ of_node_to_fwnode(np),
+ &its_fsl_mc_msi_domain_info,
+ parent);
+ if (!mc_msi_domain) {
+ pr_err("%pOF: unable to create fsl-mc domain\n", np);
+ continue;
+ }
+
+ pr_info("fsl-mc MSI: %pOF domain created\n", np);
+ }
+
+ return 0;
+}
+
+early_initcall(its_fsl_mc_msi_init);