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Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0131-bus-fsl-mc-add-fsl-mc-userspace-support.patch')
-rw-r--r--target/linux/layerscape/patches-5.4/701-net-0131-bus-fsl-mc-add-fsl-mc-userspace-support.patch371
1 files changed, 0 insertions, 371 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0131-bus-fsl-mc-add-fsl-mc-userspace-support.patch b/target/linux/layerscape/patches-5.4/701-net-0131-bus-fsl-mc-add-fsl-mc-userspace-support.patch
deleted file mode 100644
index 106ce0dd8e..0000000000
--- a/target/linux/layerscape/patches-5.4/701-net-0131-bus-fsl-mc-add-fsl-mc-userspace-support.patch
+++ /dev/null
@@ -1,371 +0,0 @@
-From 5b5567547d0088ec96160634c4e342bb06e52f19 Mon Sep 17 00:00:00 2001
-From: Ioana Ciornei <ioana.ciornei@nxp.com>
-Date: Wed, 14 Mar 2018 19:25:27 +0200
-Subject: [PATCH] bus: fsl-mc: add fsl-mc userspace support
-
-Adding userspace support for the MC (Management Complex) means exporting
-an ioctl capable device file representing the root resource container.
-
-This new functionality in the fsl-mc bus driver intends to provide
-userspace applications an interface to interact with the MC firmware.
-
-Commands that are composed in userspace are sent to the MC firmware
-through the FSL_MC_SEND_MC_COMMAND ioctl. By default the implicit MC
-I/O portal is used for this operation, but if the implicit one is busy,
-a dynamic portal is allocated and then freed upon execution.
-
-Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
----
- Documentation/ioctl/ioctl-number.rst | 1 +
- drivers/bus/fsl-mc/Kconfig | 7 ++
- drivers/bus/fsl-mc/Makefile | 3 +
- drivers/bus/fsl-mc/dprc-driver.c | 14 ++-
- drivers/bus/fsl-mc/fsl-mc-private.h | 39 ++++++++
- drivers/bus/fsl-mc/fsl-mc-uapi.c | 168 +++++++++++++++++++++++++++++++++++
- include/uapi/linux/fsl_mc.h | 9 ++
- 7 files changed, 240 insertions(+), 1 deletion(-)
- create mode 100644 drivers/bus/fsl-mc/fsl-mc-uapi.c
-
---- a/Documentation/ioctl/ioctl-number.rst
-+++ b/Documentation/ioctl/ioctl-number.rst
-@@ -180,6 +180,7 @@ Code Seq# Include File
- 'R' 00-1F linux/random.h conflict!
- 'R' 01 linux/rfkill.h conflict!
- 'R' C0-DF net/bluetooth/rfcomm.h
-+'R' E0 uapi/linux/fsl_mc.h
- 'S' all linux/cdrom.h conflict!
- 'S' 80-81 scsi/scsi_ioctl.h conflict!
- 'S' 82-FF scsi/scsi.h conflict!
---- a/drivers/bus/fsl-mc/Kconfig
-+++ b/drivers/bus/fsl-mc/Kconfig
-@@ -14,3 +14,10 @@ config FSL_MC_BUS
- architecture. The fsl-mc bus driver handles discovery of
- DPAA2 objects (which are represented as Linux devices) and
- binding objects to drivers.
-+
-+config FSL_MC_UAPI_SUPPORT
-+ bool "Management Complex (MC) userspace support"
-+ depends on FSL_MC_BUS
-+ help
-+ Provides userspace support for creating/destroying/configuring
-+ DPAA2 objects in the Management Complex.
---- a/drivers/bus/fsl-mc/Makefile
-+++ b/drivers/bus/fsl-mc/Makefile
-@@ -16,3 +16,6 @@ mc-bus-driver-objs := fsl-mc-bus.o \
- fsl-mc-allocator.o \
- fsl-mc-msi.o \
- dpmcp.o
-+
-+# MC userspace support
-+obj-$(CONFIG_FSL_MC_UAPI_SUPPORT) += fsl-mc-uapi.o
---- a/drivers/bus/fsl-mc/dprc-driver.c
-+++ b/drivers/bus/fsl-mc/dprc-driver.c
-@@ -647,6 +647,12 @@ static int dprc_probe(struct fsl_mc_devi
- } else {
- dev_set_msi_domain(&mc_dev->dev, mc_msi_domain);
- msi_domain_set = true;
-+
-+ error = fsl_mc_uapi_create_device_file(mc_bus);
-+ if (error < 0) {
-+ error = -EPROBE_DEFER;
-+ goto error_cleanup_msi_domain;
-+ }
- }
- }
-
-@@ -654,7 +660,7 @@ static int dprc_probe(struct fsl_mc_devi
- &mc_dev->mc_handle);
- if (error < 0) {
- dev_err(&mc_dev->dev, "dprc_open() failed: %d\n", error);
-- goto error_cleanup_msi_domain;
-+ goto error_cleanup_uapi;
- }
-
- error = dprc_get_attributes(mc_dev->mc_io, 0, mc_dev->mc_handle,
-@@ -706,6 +712,10 @@ static int dprc_probe(struct fsl_mc_devi
- error_cleanup_open:
- (void)dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
-
-+error_cleanup_uapi:
-+ if (fsl_mc_is_root_dprc(&mc_dev->dev))
-+ fsl_mc_uapi_remove_device_file(mc_bus);
-+
- error_cleanup_msi_domain:
- if (msi_domain_set)
- dev_set_msi_domain(&mc_dev->dev, NULL);
-@@ -774,6 +784,8 @@ static int dprc_remove(struct fsl_mc_dev
- if (!fsl_mc_is_root_dprc(&mc_dev->dev)) {
- fsl_destroy_mc_io(mc_dev->mc_io);
- mc_dev->mc_io = NULL;
-+ } else {
-+ fsl_mc_uapi_remove_device_file(mc_bus);
- }
-
- dev_info(&mc_dev->dev, "DPRC device unbound from driver");
---- a/drivers/bus/fsl-mc/fsl-mc-private.h
-+++ b/drivers/bus/fsl-mc/fsl-mc-private.h
-@@ -10,6 +10,8 @@
-
- #include <linux/fsl/mc.h>
- #include <linux/mutex.h>
-+#include <linux/ioctl.h>
-+#include <linux/miscdevice.h>
-
- /*
- * Data Path Management Complex (DPMNG) General API
-@@ -505,6 +507,22 @@ struct fsl_mc_resource_pool {
- };
-
- /**
-+ * struct fsl_mc_uapi - information associated with a device file
-+ * @misc: struct miscdevice linked to the root dprc
-+ * @device: newly created device in /dev
-+ * @mutex: mutex lock to serialize the open/release operations
-+ * @local_instance_in_use: local MC I/O instance in use or not
-+ * @static_mc_io: pointer to the static MC I/O object
-+ */
-+struct fsl_mc_uapi {
-+ struct miscdevice misc;
-+ struct device *device;
-+ struct mutex mutex; /* serialize open/release operations */
-+ u32 local_instance_in_use;
-+ struct fsl_mc_io *static_mc_io;
-+};
-+
-+/**
- * struct fsl_mc_bus - logical bus that corresponds to a physical DPRC
- * @mc_dev: fsl-mc device for the bus device itself.
- * @resource_pools: array of resource pools (one pool per resource type)
-@@ -513,6 +531,7 @@ struct fsl_mc_resource_pool {
- * @irq_resources: Pointer to array of IRQ objects for the IRQ pool
- * @scan_mutex: Serializes bus scanning
- * @dprc_attr: DPRC attributes
-+ * @uapi_misc: struct that abstracts the interaction with userspace
- */
- struct fsl_mc_bus {
- struct fsl_mc_device mc_dev;
-@@ -520,6 +539,7 @@ struct fsl_mc_bus {
- struct fsl_mc_device_irq *irq_resources;
- struct mutex scan_mutex; /* serializes bus scanning */
- struct dprc_attributes dprc_attr;
-+ struct fsl_mc_uapi uapi_misc;
- };
-
- #define to_fsl_mc_bus(_mc_dev) \
-@@ -574,4 +594,23 @@ void fsl_destroy_mc_io(struct fsl_mc_io
-
- bool fsl_mc_is_root_dprc(struct device *dev);
-
-+#ifdef CONFIG_FSL_MC_UAPI_SUPPORT
-+
-+int fsl_mc_uapi_create_device_file(struct fsl_mc_bus *mc_bus);
-+
-+void fsl_mc_uapi_remove_device_file(struct fsl_mc_bus *mc_bus);
-+
-+#else
-+
-+static inline int fsl_mc_uapi_create_device_file(struct fsl_mc_bus *mc_bus)
-+{
-+ return 0;
-+}
-+
-+static inline void fsl_mc_uapi_remove_device_file(struct fsl_mc_bus *mc_bus)
-+{
-+}
-+
-+#endif
-+
- #endif /* _FSL_MC_PRIVATE_H_ */
---- /dev/null
-+++ b/drivers/bus/fsl-mc/fsl-mc-uapi.c
-@@ -0,0 +1,168 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * Management Complex (MC) userspace support
-+ *
-+ * Copyright 2018 NXP
-+ *
-+ */
-+
-+#include <linux/slab.h>
-+#include <linux/fs.h>
-+#include <linux/uaccess.h>
-+#include <linux/miscdevice.h>
-+
-+#include "fsl-mc-private.h"
-+
-+struct uapi_priv_data {
-+ struct fsl_mc_uapi *uapi;
-+ struct fsl_mc_io *mc_io;
-+};
-+
-+static int fsl_mc_uapi_send_command(unsigned long arg,
-+ struct fsl_mc_io *mc_io)
-+{
-+ struct fsl_mc_command mc_cmd;
-+ int error;
-+
-+ error = copy_from_user(&mc_cmd, (void __user *)arg, sizeof(mc_cmd));
-+ if (error)
-+ return -EFAULT;
-+
-+ error = mc_send_command(mc_io, &mc_cmd);
-+ if (error)
-+ return error;
-+
-+ error = copy_to_user((void __user *)arg, &mc_cmd, sizeof(mc_cmd));
-+ if (error)
-+ return -EFAULT;
-+
-+ return 0;
-+}
-+
-+static int fsl_mc_uapi_dev_open(struct inode *inode, struct file *filep)
-+{
-+ struct fsl_mc_device *root_mc_device;
-+ struct uapi_priv_data *priv_data;
-+ struct fsl_mc_io *dynamic_mc_io;
-+ struct fsl_mc_uapi *mc_uapi;
-+ struct fsl_mc_bus *mc_bus;
-+ int error;
-+
-+ priv_data = kzalloc(sizeof(*priv_data), GFP_KERNEL);
-+ if (!priv_data)
-+ return -ENOMEM;
-+
-+ mc_uapi = container_of(filep->private_data, struct fsl_mc_uapi, misc);
-+ mc_bus = container_of(mc_uapi, struct fsl_mc_bus, uapi_misc);
-+ root_mc_device = &mc_bus->mc_dev;
-+
-+ mutex_lock(&mc_uapi->mutex);
-+
-+ if (!mc_uapi->local_instance_in_use) {
-+ priv_data->mc_io = mc_uapi->static_mc_io;
-+ mc_uapi->local_instance_in_use = 1;
-+ } else {
-+ error = fsl_mc_portal_allocate(root_mc_device, 0,
-+ &dynamic_mc_io);
-+ if (error) {
-+ dev_dbg(&root_mc_device->dev,
-+ "Could not allocate MC portal\n");
-+ goto error_portal_allocate;
-+ }
-+
-+ priv_data->mc_io = dynamic_mc_io;
-+ }
-+ priv_data->uapi = mc_uapi;
-+ filep->private_data = priv_data;
-+
-+ mutex_unlock(&mc_uapi->mutex);
-+
-+ return 0;
-+
-+error_portal_allocate:
-+ mutex_unlock(&mc_uapi->mutex);
-+
-+ return error;
-+}
-+
-+static int fsl_mc_uapi_dev_release(struct inode *inode, struct file *filep)
-+{
-+ struct uapi_priv_data *priv_data;
-+ struct fsl_mc_uapi *mc_uapi;
-+ struct fsl_mc_io *mc_io;
-+
-+ priv_data = filep->private_data;
-+ mc_uapi = priv_data->uapi;
-+ mc_io = priv_data->mc_io;
-+
-+ mutex_lock(&mc_uapi->mutex);
-+
-+ if (mc_io == mc_uapi->static_mc_io)
-+ mc_uapi->local_instance_in_use = 0;
-+ else
-+ fsl_mc_portal_free(mc_io);
-+
-+ kfree(filep->private_data);
-+ filep->private_data = NULL;
-+
-+ mutex_unlock(&mc_uapi->mutex);
-+
-+ return 0;
-+}
-+
-+static long fsl_mc_uapi_dev_ioctl(struct file *file,
-+ unsigned int cmd,
-+ unsigned long arg)
-+{
-+ struct uapi_priv_data *priv_data = file->private_data;
-+ struct fsl_mc_device *root_mc_device;
-+ struct fsl_mc_bus *mc_bus;
-+ int error;
-+
-+ mc_bus = container_of(priv_data->uapi, struct fsl_mc_bus, uapi_misc);
-+ root_mc_device = &mc_bus->mc_dev;
-+
-+ switch (cmd) {
-+ case FSL_MC_SEND_MC_COMMAND:
-+ error = fsl_mc_uapi_send_command(arg, priv_data->mc_io);
-+ break;
-+ default:
-+ dev_dbg(&root_mc_device->dev, "unexpected ioctl call number\n");
-+ error = -EINVAL;
-+ }
-+
-+ return error;
-+}
-+
-+static const struct file_operations fsl_mc_uapi_dev_fops = {
-+ .owner = THIS_MODULE,
-+ .open = fsl_mc_uapi_dev_open,
-+ .release = fsl_mc_uapi_dev_release,
-+ .unlocked_ioctl = fsl_mc_uapi_dev_ioctl,
-+};
-+
-+int fsl_mc_uapi_create_device_file(struct fsl_mc_bus *mc_bus)
-+{
-+ struct fsl_mc_device *mc_dev = &mc_bus->mc_dev;
-+ struct fsl_mc_uapi *mc_uapi = &mc_bus->uapi_misc;
-+ int error;
-+
-+ mc_uapi->misc.minor = MISC_DYNAMIC_MINOR;
-+ mc_uapi->misc.name = dev_name(&mc_dev->dev);
-+ mc_uapi->misc.fops = &fsl_mc_uapi_dev_fops;
-+
-+ error = misc_register(&mc_uapi->misc);
-+ if (error)
-+ return error;
-+
-+ mc_uapi->static_mc_io = mc_bus->mc_dev.mc_io;
-+
-+ mutex_init(&mc_uapi->mutex);
-+
-+ return 0;
-+}
-+
-+void fsl_mc_uapi_remove_device_file(struct fsl_mc_bus *mc_bus)
-+{
-+ misc_deregister(&mc_bus->uapi_misc.misc);
-+}
---- a/include/uapi/linux/fsl_mc.h
-+++ b/include/uapi/linux/fsl_mc.h
-@@ -16,10 +16,19 @@
- * struct fsl_mc_command - Management Complex (MC) command structure
- * @header: MC command header
- * @params: MC command parameters
-+ *
-+ * Used by FSL_MC_SEND_MC_COMMAND
- */
- struct fsl_mc_command {
- __le64 header;
- __le64 params[MC_CMD_NUM_OF_PARAMS];
- };
-
-+#define FSL_MC_SEND_CMD_IOCTL_TYPE 'R'
-+#define FSL_MC_SEND_CMD_IOCTL_SEQ 0xE0
-+
-+#define FSL_MC_SEND_MC_COMMAND \
-+ _IOWR(FSL_MC_SEND_CMD_IOCTL_TYPE, FSL_MC_SEND_CMD_IOCTL_SEQ, \
-+ struct fsl_mc_command)
-+
- #endif /* _UAPI_FSL_MC_H_ */
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