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ARM64: ion: ION_IOC_GET_PHYS compat 32bit userspace app.

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Signed-off-by: CMY <cmy@rock-chips.com>
(cherry picked from commit 92ad540611)

Signed-off-by: CMY <cmy@rock-chips.com>
This commit is contained in:
CMY
2015-01-07 15:42:54 +08:00
parent 82f69029fc
commit f5c3bef8c6
1 changed files with 106 additions and 25 deletions
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131
drivers/staging/android/ion/rockchip/rockchip_ion.c
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@@ -31,6 +31,8 @@
#include <linux/of_fdt.h>
#endif
#include <linux/compat.h>
struct ion_device *rockchip_ion_dev;
EXPORT_SYMBOL(rockchip_ion_dev);
@@ -115,37 +117,116 @@ struct ion_client *rockchip_ion_client_create(const char *name)
}
EXPORT_SYMBOL(rockchip_ion_client_create);
struct compat_ion_phys_data {
compat_int_t handle;
compat_ulong_t phys;
compat_ulong_t size;
};
#define COMPAT_ION_IOC_GET_PHYS _IOWR(ION_IOC_ROCKCHIP_MAGIC, 0, \
struct compat_ion_phys_data)
static int compat_get_ion_phys_data(
struct compat_ion_phys_data __user *data32,
struct ion_phys_data __user *data)
{
compat_ulong_t l;
compat_int_t i;
int err;
err = get_user(i, &data32->handle);
err |= put_user(i, &data->handle);
err |= get_user(l, &data32->phys);
err |= put_user(l, &data->phys);
err |= get_user(l, &data32->size);
err |= put_user(l, &data->size);
return err;
};
static int compat_put_ion_phys_data(
struct compat_ion_phys_data __user *data32,
struct ion_phys_data __user *data)
{
compat_ulong_t l;
compat_int_t i;
int err;
err = get_user(i, &data->handle);
err |= put_user(i, &data32->handle);
err |= get_user(l, &data->phys);
err |= put_user(l, &data32->phys);
err |= get_user(l, &data->size);
err |= put_user(l, &data32->size);
return err;
};
static int rockchip_ion_get_phys(struct ion_client *client, unsigned long arg)
{
struct ion_phys_data data;
struct ion_handle *handle;
int ret;
if (copy_from_user(&data, (void __user *)arg,
sizeof(struct ion_phys_data)))
return -EFAULT;
handle = ion_handle_get_by_id(client, data.handle);
if (IS_ERR(handle))
return PTR_ERR(handle);
ret = ion_phys(client, handle, &data.phys, (size_t *)&data.size);
pr_debug("ret=%d, phys=0x%lX\n", ret, data.phys);
ion_handle_put(handle);
if (ret < 0)
return ret;
if (copy_to_user((void __user *)arg, &data,
sizeof(struct ion_phys_data)))
return -EFAULT;
return 0;
}
static long rockchip_custom_ioctl (struct ion_client *client, unsigned int cmd,
unsigned long arg)
{
pr_debug("[%s %d] cmd=%X\n", __func__, __LINE__, cmd);
long ret;
switch (cmd) {
case ION_IOC_GET_PHYS:
{
struct ion_phys_data data;
struct ion_handle *handle;
int ret;
if (copy_from_user(&data, (void __user *)arg,
sizeof(struct ion_phys_data)))
return -EFAULT;
pr_debug("%s(%d): cmd=%x\n", __func__, __LINE__, cmd);
handle = ion_handle_get_by_id(client, data.handle);
if (IS_ERR(handle))
return PTR_ERR(handle);
if (is_compat_task()) {
switch (cmd) {
case COMPAT_ION_IOC_GET_PHYS: {
struct compat_ion_phys_data __user *data32;
struct ion_phys_data __user *data;
int err;
ret = ion_phys(client, handle, &data.phys, (size_t *)&data.size);
pr_debug("ret=%d, phys=0x%lX\n", ret, data.phys);
ion_handle_put(handle);
if(ret < 0)
return ret;
if (copy_to_user((void __user *)arg, &data, sizeof(struct ion_phys_data)))
return -EFAULT;
break;
}
default:
return -ENOTTY;
data32 = compat_ptr(arg);
data = compat_alloc_user_space(sizeof(*data));
if (data == NULL)
return -EFAULT;
err = compat_get_ion_phys_data(data32, data);
if (err)
return err;
ret = rockchip_ion_get_phys(client,
(unsigned long)data);
err = compat_put_ion_phys_data(data32, data);
return ret ? ret : err;
}
default:
return -ENOTTY;
}
} else {
switch (cmd) {
case ION_IOC_GET_PHYS:
return rockchip_ion_get_phys(client, arg);
default:
return -ENOTTY;
}
}
return 0;