mali: Add mali400 kernel module

Add mali400ko from tag SNOWBALL_BSP_111012_2.1.

Signed-off-by: John Fredriksson <john.xj.fredriksson@stericsson.com>
Change-Id: I82d24760247f8a5a5b786fc10187f32d9048f9a9
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/33811
Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com>

1 files changed, 128 insertions, 0 deletions

diff --git a/drivers/gpu/mali/mali400ko/driver/src/devicedrv/mali/linux/mali_ukk_gp.c b/drivers/gpu/mali/mali400ko/driver/src/devicedrv/mali/linux/mali_ukk_gp.c
new file mode 100644
index 00000000000..a6f355fd459
--- /dev/null
+++ b/drivers/gpu/mali/mali400ko/driver/src/devicedrv/mali/linux/mali_ukk_gp.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2010-2011 ARM Limited. All rights reserved.
+ * 
+ * This program is free software and is provided to you under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
+ * 
+ * A copy of the licence is included with the program, and can also be obtained from Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+#include <linux/fs.h>       /* file system operations */
+#include <asm/uaccess.h>    /* user space access */
+
+#include "mali_ukk.h"
+#include "mali_osk.h"
+#include "mali_kernel_common.h"
+#include "mali_kernel_session_manager.h"
+#include "mali_ukk_wrappers.h"
+
+int gp_start_job_wrapper(struct mali_session_data *session_data, _mali_uk_gp_start_job_s __user *uargs)
+{
+    _mali_uk_gp_start_job_s kargs;
+    _mali_osk_errcode_t err;
+
+    MALI_CHECK_NON_NULL(uargs, -EINVAL);
+    MALI_CHECK_NON_NULL(session_data, -EINVAL);
+
+	if (!access_ok(VERIFY_WRITE, uargs, sizeof(_mali_uk_gp_start_job_s)))
+	{
+		return -EFAULT;
+	}
+
+    if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_gp_start_job_s))) return -EFAULT;
+
+    kargs.ctx = session_data;
+    err = _mali_ukk_gp_start_job(&kargs);
+    if (_MALI_OSK_ERR_OK != err) return map_errcode(err);
+
+    kargs.ctx = NULL; /* prevent kernel address to be returned to user space */
+    if (0 != copy_to_user(uargs, &kargs, sizeof(_mali_uk_gp_start_job_s)))
+	{
+		/*
+		 * If this happens, then user space will not know that the job was actually started,
+		 * and if we return a queued job, then user space will still think that one is still queued.
+		 * This will typically lead to a deadlock in user space.
+		 * This could however only happen if user space deliberately passes a user buffer which
+		 * passes the access_ok(VERIFY_WRITE) check, but isn't fully writable at the time of copy_to_user().
+		 * The official Mali driver will never attempt to do that, and kernel space should not be affected.
+		 * That is why we do not bother to do a complex rollback in this very very very rare case.
+		 */
+		return -EFAULT;
+	}
+
+    return 0;
+}
+
+int gp_abort_job_wrapper(struct mali_session_data *session_data, _mali_uk_gp_abort_job_s __user *uargs)
+{
+    _mali_uk_gp_abort_job_s kargs;
+
+    MALI_CHECK_NON_NULL(uargs, -EINVAL);
+    MALI_CHECK_NON_NULL(session_data, -EINVAL);
+
+    if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_gp_abort_job_s))) return -EFAULT;
+
+    kargs.ctx = session_data;
+    _mali_ukk_gp_abort_job(&kargs);
+
+    return 0;
+}
+
+
+int gp_get_core_version_wrapper(struct mali_session_data *session_data, _mali_uk_get_gp_core_version_s __user *uargs)
+{
+    _mali_uk_get_gp_core_version_s kargs;
+    _mali_osk_errcode_t err;
+
+    MALI_CHECK_NON_NULL(uargs, -EINVAL);
+    MALI_CHECK_NON_NULL(session_data, -EINVAL);
+
+    kargs.ctx = session_data;
+    err =  _mali_ukk_get_gp_core_version(&kargs);
+    if (_MALI_OSK_ERR_OK != err) return map_errcode(err);
+
+	/* no known transactions to roll-back */
+
+    if (0 != put_user(kargs.version, &uargs->version)) return -EFAULT;
+
+    return 0;
+}
+
+int gp_suspend_response_wrapper(struct mali_session_data *session_data, _mali_uk_gp_suspend_response_s __user *uargs)
+{
+    _mali_uk_gp_suspend_response_s kargs;
+    _mali_osk_errcode_t err;
+
+    MALI_CHECK_NON_NULL(uargs, -EINVAL);
+    MALI_CHECK_NON_NULL(session_data, -EINVAL);
+
+    if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_gp_suspend_response_s))) return -EFAULT;
+
+    kargs.ctx = session_data;
+    err = _mali_ukk_gp_suspend_response(&kargs);
+    if (_MALI_OSK_ERR_OK != err) return map_errcode(err);
+
+    if (0 != put_user(kargs.cookie, &uargs->cookie)) return -EFAULT;
+
+    /* no known transactions to roll-back */
+    return 0;
+}
+
+int gp_get_number_of_cores_wrapper(struct mali_session_data *session_data, _mali_uk_get_gp_number_of_cores_s __user *uargs)
+{
+    _mali_uk_get_gp_number_of_cores_s kargs;
+    _mali_osk_errcode_t err;
+
+    MALI_CHECK_NON_NULL(uargs, -EINVAL);
+    MALI_CHECK_NON_NULL(session_data, -EINVAL);
+
+    kargs.ctx = session_data;
+    err = _mali_ukk_get_gp_number_of_cores(&kargs);
+    if (_MALI_OSK_ERR_OK != err) return map_errcode(err);
+
+	/* no known transactions to roll-back */
+
+    if (0 != put_user(kargs.number_of_cores, &uargs->number_of_cores)) return -EFAULT;
+
+    return 0;
+}