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authorRom Lemarchand <romlem@google.com>2013-10-24 05:39:34 -0700
committerRom Lemarchand <romlem@google.com>2013-10-24 15:13:42 -0700
commita402f70ff3c94edb73b9f5670b5a55a27b1f1f00 (patch)
tree52464ec3b65519cec95ce3efe71a804700a56d16
parentdcd2da8015c7ac2da6f57fc0d8c15b80e44c4aed (diff)
ion: add compat_ioctl
Add a compat_ioctl to the ion driver Change-Id: I43da387e22ff9c4a29f0159dfe9e898efc500553 Signed-off-by: Rom Lemarchand <romlem@google.com>
-rw-r--r--drivers/gpu/ion/Makefile3
-rw-r--r--drivers/gpu/ion/compat_ion.c172
-rw-r--r--drivers/gpu/ion/compat_ion.h30
-rw-r--r--drivers/gpu/ion/ion.c2
4 files changed, 207 insertions, 0 deletions
diff --git a/drivers/gpu/ion/Makefile b/drivers/gpu/ion/Makefile
index ce0f1ef1c23..9c956659124 100644
--- a/drivers/gpu/ion/Makefile
+++ b/drivers/gpu/ion/Makefile
@@ -1,3 +1,6 @@
obj-$(CONFIG_ION) += ion.o ion_heap.o ion_page_pool.o ion_system_heap.o \
ion_carveout_heap.o ion_chunk_heap.o ion_cma_heap.o
+ifdef CONFIG_COMPAT
+obj-$(CONFIG_ION) += compat_ion.o
+endif
obj-$(CONFIG_ION_TEGRA) += tegra/
diff --git a/drivers/gpu/ion/compat_ion.c b/drivers/gpu/ion/compat_ion.c
new file mode 100644
index 00000000000..e0d2839952a
--- /dev/null
+++ b/drivers/gpu/ion/compat_ion.c
@@ -0,0 +1,172 @@
+/*
+ * drivers/gpu/ion/compat_ion.c
+ *
+ * Copyright (C) 2013 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/ion.h>
+#include <linux/compat.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+
+#include "compat_ion.h"
+
+/* See include/linux/ion.h for the definition of these structs */
+struct compat_ion_allocation_data {
+ compat_size_t len;
+ compat_size_t align;
+ compat_uint_t heap_id_mask;
+ compat_uint_t flags;
+ compat_int_t handle;
+};
+
+struct compat_ion_custom_data {
+ compat_uint_t cmd;
+ compat_ulong_t arg;
+};
+
+static int compat_get_ion_allocation_data(
+ struct compat_ion_allocation_data __user *data32,
+ struct ion_allocation_data __user *data)
+{
+ compat_size_t s;
+ compat_uint_t u;
+ compat_int_t i;
+ int err;
+
+ err = get_user(s, &data32->len);
+ err |= put_user(s, &data->len);
+ err |= get_user(s, &data32->align);
+ err |= put_user(s, &data->align);
+ err |= get_user(u, &data32->heap_id_mask);
+ err |= put_user(u, &data->heap_id_mask);
+ err |= get_user(u, &data32->flags);
+ err |= put_user(u, &data->flags);
+ err |= get_user(i, &data32->handle);
+ err |= put_user(i, &data->handle);
+
+ return err;
+}
+
+static int compat_put_ion_allocation_data(
+ struct compat_ion_allocation_data __user *data32,
+ struct ion_allocation_data __user *data)
+{
+ compat_size_t s;
+ compat_uint_t u;
+ compat_int_t i;
+ int err;
+
+ err = get_user(s, &data->len);
+ err |= put_user(s, &data32->len);
+ err |= get_user(s, &data->align);
+ err |= put_user(s, &data32->align);
+ err |= get_user(u, &data->heap_id_mask);
+ err |= put_user(u, &data32->heap_id_mask);
+ err |= get_user(u, &data->flags);
+ err |= put_user(u, &data32->flags);
+ err |= get_user(i, &data->handle);
+ err |= put_user(i, &data32->handle);
+
+ return err;
+}
+
+static int compat_get_ion_custom_data(
+ struct compat_ion_custom_data __user *data32,
+ struct ion_custom_data __user *data)
+{
+ compat_uint_t cmd;
+ compat_ulong_t arg;
+ int err;
+
+ err = get_user(cmd, &data32->cmd);
+ err |= put_user(cmd, &data->cmd);
+ err |= get_user(arg, &data32->arg);
+ err |= put_user(arg, &data->arg);
+
+ return err;
+};
+
+long compat_ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ long ret;
+
+ if (!filp->f_op || !filp->f_op->unlocked_ioctl)
+ return -ENOTTY;
+
+ switch (cmd) {
+ case ION_IOC_ALLOC:
+ {
+ struct compat_ion_allocation_data __user *data32;
+ struct ion_allocation_data __user *data;
+ int err;
+
+ data32 = compat_ptr(arg);
+ data = compat_alloc_user_space(sizeof(*data));
+ if (data == NULL)
+ return -EFAULT;
+
+ err = compat_get_ion_allocation_data(data32, data);
+ if (err)
+ return err;
+
+ ret = filp->f_op->unlocked_ioctl(filp, cmd,
+ (unsigned long)data);
+ err = compat_put_ion_allocation_data(data32, data);
+ return ret ? ret : err;
+ }
+ case ION_IOC_FREE:
+ {
+ struct compat_ion_allocation_data __user *data32;
+ struct ion_allocation_data __user *data;
+ int err;
+
+ data32 = compat_ptr(arg);
+ data = compat_alloc_user_space(sizeof(*data));
+ if (data == NULL)
+ return -EFAULT;
+
+ err = compat_get_ion_allocation_data(data32, data);
+ if (err)
+ return err;
+
+ return filp->f_op->unlocked_ioctl(filp, cmd,
+ (unsigned long)data);
+ }
+ case ION_IOC_CUSTOM: {
+ struct compat_ion_custom_data __user *data32;
+ struct ion_custom_data __user *data;
+ int err;
+
+ data32 = compat_ptr(arg);
+ data = compat_alloc_user_space(sizeof(*data));
+ if (data == NULL)
+ return -EFAULT;
+
+ err = compat_get_ion_custom_data(data32, data);
+ if (err)
+ return err;
+
+ return filp->f_op->unlocked_ioctl(filp, cmd,
+ (unsigned long)data);
+ }
+ case ION_IOC_SHARE:
+ case ION_IOC_MAP:
+ case ION_IOC_IMPORT:
+ case ION_IOC_SYNC:
+ return filp->f_op->unlocked_ioctl(filp, cmd,
+ (unsigned long)compat_ptr(arg));
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
diff --git a/drivers/gpu/ion/compat_ion.h b/drivers/gpu/ion/compat_ion.h
new file mode 100644
index 00000000000..3a9c8c08c24
--- /dev/null
+++ b/drivers/gpu/ion/compat_ion.h
@@ -0,0 +1,30 @@
+/*
+
+ * drivers/gpu/ion/compat_ion.h
+ *
+ * Copyright (C) 2013 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_COMPAT_ION_H
+#define _LINUX_COMPAT_ION_H
+
+#if IS_ENABLED(CONFIG_COMPAT)
+
+long compat_ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
+
+#else
+
+#define compat_ion_ioctl NULL
+
+#endif /* CONFIG_COMPAT */
+#endif /* _LINUX_COMPAT_ION_H */
diff --git a/drivers/gpu/ion/ion.c b/drivers/gpu/ion/ion.c
index c4d0a487823..e4ffc9d5b94 100644
--- a/drivers/gpu/ion/ion.c
+++ b/drivers/gpu/ion/ion.c
@@ -38,6 +38,7 @@
#include <linux/idr.h>
#include "ion_priv.h"
+#include "compat_ion.h"
/**
* struct ion_device - the metadata of the ion device node
@@ -1256,6 +1257,7 @@ static const struct file_operations ion_fops = {
.open = ion_open,
.release = ion_release,
.unlocked_ioctl = ion_ioctl,
+ .compat_ioctl = compat_ion_ioctl,
};
static size_t ion_debug_heap_total(struct ion_client *client,