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Diffstat (limited to 'target/linux/layerscape/patches-4.4/7145-staging-fsl-mc-Added-generic-MSI-support-for-FSL-MC-.patch')
-rw-r--r--target/linux/layerscape/patches-4.4/7145-staging-fsl-mc-Added-generic-MSI-support-for-FSL-MC-.patch400
1 files changed, 0 insertions, 400 deletions
diff --git a/target/linux/layerscape/patches-4.4/7145-staging-fsl-mc-Added-generic-MSI-support-for-FSL-MC-.patch b/target/linux/layerscape/patches-4.4/7145-staging-fsl-mc-Added-generic-MSI-support-for-FSL-MC-.patch
deleted file mode 100644
index 1f3a9f0506..0000000000
--- a/target/linux/layerscape/patches-4.4/7145-staging-fsl-mc-Added-generic-MSI-support-for-FSL-MC-.patch
+++ /dev/null
@@ -1,400 +0,0 @@
-From 8ebb892cd56d14e72580ab36c3b5eb2d4603a7fe Mon Sep 17 00:00:00 2001
-From: "J. German Rivera" <German.Rivera@freescale.com>
-Date: Wed, 6 Jan 2016 16:03:21 -0600
-Subject: [PATCH 145/226] staging: fsl-mc: Added generic MSI support for
- FSL-MC devices
-
-Created an MSI domain for the fsl-mc bus-- including functions
-to create a domain, find a domain, alloc/free domain irqs, and
-bus specific overrides for domain and irq_chip ops.
-
-Signed-off-by: J. German Rivera <German.Rivera@freescale.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- drivers/staging/fsl-mc/bus/Kconfig | 1 +
- drivers/staging/fsl-mc/bus/Makefile | 1 +
- drivers/staging/fsl-mc/bus/mc-msi.c | 276 +++++++++++++++++++++++++++
- drivers/staging/fsl-mc/include/dprc.h | 2 +-
- drivers/staging/fsl-mc/include/mc-private.h | 17 ++
- drivers/staging/fsl-mc/include/mc.h | 17 ++
- 6 files changed, 313 insertions(+), 1 deletion(-)
- create mode 100644 drivers/staging/fsl-mc/bus/mc-msi.c
-
---- a/drivers/staging/fsl-mc/bus/Kconfig
-+++ b/drivers/staging/fsl-mc/bus/Kconfig
-@@ -9,6 +9,7 @@
- config FSL_MC_BUS
- tristate "Freescale Management Complex (MC) bus driver"
- depends on OF && ARM64
-+ select GENERIC_MSI_IRQ_DOMAIN
- help
- Driver to enable the bus infrastructure for the Freescale
- QorIQ Management Complex (fsl-mc). The fsl-mc is a hardware
---- a/drivers/staging/fsl-mc/bus/Makefile
-+++ b/drivers/staging/fsl-mc/bus/Makefile
-@@ -13,5 +13,6 @@ mc-bus-driver-objs := mc-bus.o \
- dpmng.o \
- dprc-driver.o \
- mc-allocator.o \
-+ mc-msi.o \
- dpmcp.o \
- dpbp.o
---- /dev/null
-+++ b/drivers/staging/fsl-mc/bus/mc-msi.c
-@@ -0,0 +1,276 @@
-+/*
-+ * 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/of_irq.h>
-+#include <linux/irq.h>
-+#include <linux/irqdomain.h>
-+#include <linux/msi.h>
-+#include "../include/mc-sys.h"
-+#include "dprc-cmd.h"
-+
-+static void fsl_mc_msi_set_desc(msi_alloc_info_t *arg,
-+ struct msi_desc *desc)
-+{
-+ arg->desc = desc;
-+ arg->hwirq = (irq_hw_number_t)desc->fsl_mc.msi_index;
-+}
-+
-+static void fsl_mc_msi_update_dom_ops(struct msi_domain_info *info)
-+{
-+ struct msi_domain_ops *ops = info->ops;
-+
-+ if (WARN_ON(!ops))
-+ return;
-+
-+ /*
-+ * set_desc should not be set by the caller
-+ */
-+ if (WARN_ON(ops->set_desc))
-+ return;
-+
-+ ops->set_desc = fsl_mc_msi_set_desc;
-+}
-+
-+static void __fsl_mc_msi_write_msg(struct fsl_mc_device *mc_bus_dev,
-+ struct fsl_mc_device_irq *mc_dev_irq)
-+{
-+ int error;
-+ struct fsl_mc_device *owner_mc_dev = mc_dev_irq->mc_dev;
-+ struct msi_desc *msi_desc = mc_dev_irq->msi_desc;
-+ struct dprc_irq_cfg irq_cfg;
-+
-+ /*
-+ * msi_desc->msg.address is 0x0 when this function is invoked in
-+ * the free_irq() code path. In this case, for the MC, we don't
-+ * really need to "unprogram" the MSI, so we just return.
-+ */
-+ if (msi_desc->msg.address_lo == 0x0 && msi_desc->msg.address_hi == 0x0)
-+ return;
-+
-+ if (WARN_ON(!owner_mc_dev))
-+ return;
-+
-+ irq_cfg.paddr = ((u64)msi_desc->msg.address_hi << 32) |
-+ msi_desc->msg.address_lo;
-+ irq_cfg.val = msi_desc->msg.data;
-+ irq_cfg.user_irq_id = msi_desc->irq;
-+
-+ if (owner_mc_dev == mc_bus_dev) {
-+ /*
-+ * IRQ is for the mc_bus_dev's DPRC itself
-+ */
-+ error = dprc_set_irq(mc_bus_dev->mc_io,
-+ MC_CMD_FLAG_INTR_DIS | MC_CMD_FLAG_PRI,
-+ mc_bus_dev->mc_handle,
-+ mc_dev_irq->dev_irq_index,
-+ &irq_cfg);
-+ if (error < 0) {
-+ dev_err(&owner_mc_dev->dev,
-+ "dprc_set_irq() failed: %d\n", error);
-+ }
-+ } else {
-+ /*
-+ * IRQ is for for a child device of mc_bus_dev
-+ */
-+ error = dprc_set_obj_irq(mc_bus_dev->mc_io,
-+ MC_CMD_FLAG_INTR_DIS | MC_CMD_FLAG_PRI,
-+ mc_bus_dev->mc_handle,
-+ owner_mc_dev->obj_desc.type,
-+ owner_mc_dev->obj_desc.id,
-+ mc_dev_irq->dev_irq_index,
-+ &irq_cfg);
-+ if (error < 0) {
-+ dev_err(&owner_mc_dev->dev,
-+ "dprc_obj_set_irq() failed: %d\n", error);
-+ }
-+ }
-+}
-+
-+/*
-+ * NOTE: This function is invoked with interrupts disabled
-+ */
-+static void fsl_mc_msi_write_msg(struct irq_data *irq_data,
-+ struct msi_msg *msg)
-+{
-+ struct msi_desc *msi_desc = irq_data_get_msi_desc(irq_data);
-+ struct fsl_mc_device *mc_bus_dev = to_fsl_mc_device(msi_desc->dev);
-+ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
-+ struct fsl_mc_device_irq *mc_dev_irq =
-+ &mc_bus->irq_resources[msi_desc->fsl_mc.msi_index];
-+
-+ WARN_ON(mc_dev_irq->msi_desc != msi_desc);
-+ msi_desc->msg = *msg;
-+
-+ /*
-+ * Program the MSI (paddr, value) pair in the device:
-+ */
-+ __fsl_mc_msi_write_msg(mc_bus_dev, mc_dev_irq);
-+}
-+
-+static void fsl_mc_msi_update_chip_ops(struct msi_domain_info *info)
-+{
-+ struct irq_chip *chip = info->chip;
-+
-+ if (WARN_ON((!chip)))
-+ return;
-+
-+ /*
-+ * irq_write_msi_msg should not be set by the caller
-+ */
-+ if (WARN_ON(chip->irq_write_msi_msg))
-+ return;
-+
-+ chip->irq_write_msi_msg = fsl_mc_msi_write_msg;
-+}
-+
-+/**
-+ * fsl_mc_msi_create_irq_domain - Create a fsl-mc MSI interrupt domain
-+ * @np: Optional device-tree node of the interrupt controller
-+ * @info: MSI domain info
-+ * @parent: Parent irq domain
-+ *
-+ * Updates the domain and chip ops and creates a fsl-mc MSI
-+ * interrupt domain.
-+ *
-+ * Returns:
-+ * A domain pointer or NULL in case of failure.
-+ */
-+struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
-+ struct msi_domain_info *info,
-+ struct irq_domain *parent)
-+{
-+ struct irq_domain *domain;
-+
-+ if (info->flags & MSI_FLAG_USE_DEF_DOM_OPS)
-+ fsl_mc_msi_update_dom_ops(info);
-+ if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
-+ fsl_mc_msi_update_chip_ops(info);
-+
-+ domain = msi_create_irq_domain(fwnode, info, parent);
-+ if (domain)
-+ domain->bus_token = DOMAIN_BUS_FSL_MC_MSI;
-+
-+ return domain;
-+}
-+
-+int fsl_mc_find_msi_domain(struct device *mc_platform_dev,
-+ struct irq_domain **mc_msi_domain)
-+{
-+ struct irq_domain *msi_domain;
-+ struct device_node *mc_of_node = mc_platform_dev->of_node;
-+
-+ msi_domain = of_msi_get_domain(mc_platform_dev, mc_of_node,
-+ DOMAIN_BUS_FSL_MC_MSI);
-+ if (!msi_domain) {
-+ pr_err("Unable to find fsl-mc MSI domain for %s\n",
-+ mc_of_node->full_name);
-+
-+ return -ENOENT;
-+ }
-+
-+ *mc_msi_domain = msi_domain;
-+ return 0;
-+}
-+
-+static void fsl_mc_msi_free_descs(struct device *dev)
-+{
-+ struct msi_desc *desc, *tmp;
-+
-+ list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
-+ list_del(&desc->list);
-+ free_msi_entry(desc);
-+ }
-+}
-+
-+static int fsl_mc_msi_alloc_descs(struct device *dev, unsigned int irq_count)
-+
-+{
-+ unsigned int i;
-+ int error;
-+ struct msi_desc *msi_desc;
-+
-+ for (i = 0; i < irq_count; i++) {
-+ msi_desc = alloc_msi_entry(dev);
-+ if (!msi_desc) {
-+ dev_err(dev, "Failed to allocate msi entry\n");
-+ error = -ENOMEM;
-+ goto cleanup_msi_descs;
-+ }
-+
-+ msi_desc->fsl_mc.msi_index = i;
-+ msi_desc->nvec_used = 1;
-+ INIT_LIST_HEAD(&msi_desc->list);
-+ list_add_tail(&msi_desc->list, dev_to_msi_list(dev));
-+ }
-+
-+ return 0;
-+
-+cleanup_msi_descs:
-+ fsl_mc_msi_free_descs(dev);
-+ return error;
-+}
-+
-+int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
-+ unsigned int irq_count)
-+{
-+ struct irq_domain *msi_domain;
-+ int error;
-+
-+ if (WARN_ON(!list_empty(dev_to_msi_list(dev))))
-+ return -EINVAL;
-+
-+ error = fsl_mc_msi_alloc_descs(dev, irq_count);
-+ if (error < 0)
-+ return error;
-+
-+ msi_domain = dev_get_msi_domain(dev);
-+ if (WARN_ON(!msi_domain)) {
-+ error = -EINVAL;
-+ goto cleanup_msi_descs;
-+ }
-+
-+ /*
-+ * NOTE: Calling this function will trigger the invocation of the
-+ * its_fsl_mc_msi_prepare() callback
-+ */
-+ error = msi_domain_alloc_irqs(msi_domain, dev, irq_count);
-+
-+ if (error) {
-+ dev_err(dev, "Failed to allocate IRQs\n");
-+ goto cleanup_msi_descs;
-+ }
-+
-+ return 0;
-+
-+cleanup_msi_descs:
-+ fsl_mc_msi_free_descs(dev);
-+ return error;
-+}
-+
-+void fsl_mc_msi_domain_free_irqs(struct device *dev)
-+{
-+ struct irq_domain *msi_domain;
-+
-+ msi_domain = dev_get_msi_domain(dev);
-+ if (WARN_ON(!msi_domain))
-+ return;
-+
-+ msi_domain_free_irqs(msi_domain, dev);
-+
-+ if (WARN_ON(list_empty(dev_to_msi_list(dev))))
-+ return;
-+
-+ fsl_mc_msi_free_descs(dev);
-+}
---- a/drivers/staging/fsl-mc/include/dprc.h
-+++ b/drivers/staging/fsl-mc/include/dprc.h
-@@ -176,7 +176,7 @@ int dprc_reset_container(struct fsl_mc_i
- * @user_irq_id: A user defined number associated with this IRQ
- */
- struct dprc_irq_cfg {
-- u64 paddr;
-+ phys_addr_t paddr;
- u32 val;
- int user_irq_id;
- };
---- a/drivers/staging/fsl-mc/include/mc-private.h
-+++ b/drivers/staging/fsl-mc/include/mc-private.h
-@@ -26,6 +26,9 @@
- strcmp(_obj_type, "dpmcp") == 0 || \
- strcmp(_obj_type, "dpcon") == 0)
-
-+struct irq_domain;
-+struct msi_domain_info;
-+
- /**
- * struct fsl_mc - Private data of a "fsl,qoriq-mc" platform device
- * @root_mc_bus_dev: MC object device representing the root DPRC
-@@ -79,11 +82,13 @@ struct fsl_mc_resource_pool {
- * @resource_pools: array of resource pools (one pool per resource type)
- * for this MC bus. These resources represent allocatable entities
- * from the physical DPRC.
-+ * @irq_resources: Pointer to array of IRQ objects for the IRQ pool
- * @scan_mutex: Serializes bus scanning
- */
- struct fsl_mc_bus {
- struct fsl_mc_device mc_dev;
- struct fsl_mc_resource_pool resource_pools[FSL_MC_NUM_POOL_TYPES];
-+ struct fsl_mc_device_irq *irq_resources;
- struct mutex scan_mutex; /* serializes bus scanning */
- };
-
-@@ -116,4 +121,16 @@ int __must_check fsl_mc_resource_allocat
-
- void fsl_mc_resource_free(struct fsl_mc_resource *resource);
-
-+struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
-+ struct msi_domain_info *info,
-+ struct irq_domain *parent);
-+
-+int fsl_mc_find_msi_domain(struct device *mc_platform_dev,
-+ struct irq_domain **mc_msi_domain);
-+
-+int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
-+ unsigned int irq_count);
-+
-+void fsl_mc_msi_domain_free_irqs(struct device *dev);
-+
- #endif /* _FSL_MC_PRIVATE_H_ */
---- a/drivers/staging/fsl-mc/include/mc.h
-+++ b/drivers/staging/fsl-mc/include/mc.h
-@@ -104,6 +104,23 @@ struct fsl_mc_resource {
- };
-
- /**
-+ * struct fsl_mc_device_irq - MC object device message-based interrupt
-+ * @msi_desc: pointer to MSI descriptor allocated by fsl_mc_msi_alloc_descs()
-+ * @mc_dev: MC object device that owns this interrupt
-+ * @dev_irq_index: device-relative IRQ index
-+ * @resource: MC generic resource associated with the interrupt
-+ */
-+struct fsl_mc_device_irq {
-+ struct msi_desc *msi_desc;
-+ struct fsl_mc_device *mc_dev;
-+ u8 dev_irq_index;
-+ struct fsl_mc_resource resource;
-+};
-+
-+#define to_fsl_mc_irq(_mc_resource) \
-+ container_of(_mc_resource, struct fsl_mc_device_irq, resource)
-+
-+/**
- * Bit masks for a MC object device (struct fsl_mc_device) flags
- */
- #define FSL_MC_IS_DPRC 0x0001
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-17 06:55:20 +0000