diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/7146-staging-fsl-mc-Added-GICv3-ITS-support-for-FSL-MC-MS.patch')
-rw-r--r-- | target/linux/layerscape/patches-4.4/7146-staging-fsl-mc-Added-GICv3-ITS-support-for-FSL-MC-MS.patch | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-4.4/7146-staging-fsl-mc-Added-GICv3-ITS-support-for-FSL-MC-MS.patch b/target/linux/layerscape/patches-4.4/7146-staging-fsl-mc-Added-GICv3-ITS-support-for-FSL-MC-MS.patch new file mode 100644 index 0000000000..5b254d70d2 --- /dev/null +++ b/target/linux/layerscape/patches-4.4/7146-staging-fsl-mc-Added-GICv3-ITS-support-for-FSL-MC-MS.patch @@ -0,0 +1,167 @@ +From 85cb8ae26b6c69f0a118f32b7b7cd4f22d782da3 Mon Sep 17 00:00:00 2001 +From: "J. German Rivera" <German.Rivera@freescale.com> +Date: Wed, 6 Jan 2016 16:03:22 -0600 +Subject: [PATCH 146/226] staging: fsl-mc: Added GICv3-ITS support for FSL-MC + MSIs + +Added platform-specific MSI support layer for FSL-MC devices. + +Signed-off-by: J. German Rivera <German.Rivera@freescale.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/staging/fsl-mc/bus/Makefile | 1 + + .../staging/fsl-mc/bus/irq-gic-v3-its-fsl-mc-msi.c | 127 ++++++++++++++++++++ + drivers/staging/fsl-mc/include/mc-private.h | 4 + + 3 files changed, 132 insertions(+) + create mode 100644 drivers/staging/fsl-mc/bus/irq-gic-v3-its-fsl-mc-msi.c + +--- a/drivers/staging/fsl-mc/bus/Makefile ++++ b/drivers/staging/fsl-mc/bus/Makefile +@@ -14,5 +14,6 @@ mc-bus-driver-objs := mc-bus.o \ + dprc-driver.o \ + mc-allocator.o \ + mc-msi.o \ ++ irq-gic-v3-its-fsl-mc-msi.o \ + dpmcp.o \ + dpbp.o +--- /dev/null ++++ b/drivers/staging/fsl-mc/bus/irq-gic-v3-its-fsl-mc-msi.c +@@ -0,0 +1,127 @@ ++/* ++ * Freescale Management Complex (MC) bus driver MSI support ++ * ++ * Copyright (C) 2015 Freescale Semiconductor, Inc. ++ * Author: German Rivera <German.Rivera@freescale.com> ++ * ++ * This file is licensed under the terms of the GNU General Public ++ * License version 2. This program is licensed "as is" without any ++ * warranty of any kind, whether express or implied. ++ */ ++ ++#include "../include/mc-private.h" ++#include <linux/of_device.h> ++#include <linux/of_address.h> ++#include <linux/irqchip/arm-gic-v3.h> ++#include <linux/irq.h> ++#include <linux/msi.h> ++#include <linux/of.h> ++#include <linux/of_irq.h> ++#include "../include/mc-sys.h" ++#include "dprc-cmd.h" ++ ++static struct irq_chip its_msi_irq_chip = { ++ .name = "fsl-mc-bus-msi", ++ .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 (WARN_ON(dev->bus != &fsl_mc_bus_type)) ++ return -EINVAL; ++ ++ mc_bus_dev = to_fsl_mc_device(dev); ++ if (WARN_ON(!(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 = { ++ .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", }, ++ {}, ++}; ++ ++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("%s: unable to locate ITS domain\n", ++ np->full_name); ++ 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("%s: unable to create fsl-mc domain\n", ++ np->full_name); ++ continue; ++ } ++ ++ WARN_ON(mc_msi_domain-> ++ host_data != &its_fsl_mc_msi_domain_info); ++ ++ pr_info("fsl-mc MSI: %s domain created\n", np->full_name); ++ } ++ ++ return 0; ++} ++ ++void its_fsl_mc_msi_cleanup(void) ++{ ++ struct device_node *np; ++ ++ for (np = of_find_matching_node(NULL, its_device_id); np; ++ np = of_find_matching_node(np, its_device_id)) { ++ struct irq_domain *mc_msi_domain = irq_find_matching_host( ++ np, ++ DOMAIN_BUS_FSL_MC_MSI); ++ ++ if (!of_property_read_bool(np, "msi-controller")) ++ continue; ++ ++ mc_msi_domain = irq_find_matching_host(np, ++ DOMAIN_BUS_FSL_MC_MSI); ++ if (mc_msi_domain && ++ mc_msi_domain->host_data == &its_fsl_mc_msi_domain_info) ++ irq_domain_remove(mc_msi_domain); ++ } ++} +--- a/drivers/staging/fsl-mc/include/mc-private.h ++++ b/drivers/staging/fsl-mc/include/mc-private.h +@@ -133,4 +133,8 @@ int fsl_mc_msi_domain_alloc_irqs(struct + + void fsl_mc_msi_domain_free_irqs(struct device *dev); + ++int __init its_fsl_mc_msi_init(void); ++ ++void its_fsl_mc_msi_cleanup(void); ++ + #endif /* _FSL_MC_PRIVATE_H_ */ |