gpu: nvgpu: add mutex and spinlock abstraction files

Add new abstraction file <nvgpu/lock.h> for all mutex,
spinlock and raw_spinlock operations.

Add linux specific file <nvgpu/lock_linux.h>
which implements linux specific operations for above

Jira NVGPU-13

Change-Id: Idab96aa8bf949d6a92ea0edc9f40e90fca401ea4
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1293186
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/lock.h b/drivers/gpu/nvgpu/include/nvgpu/lock.h
new file mode 100644
index 00000000..ad070380
--- /dev/null
+++ b/drivers/gpu/nvgpu/include/nvgpu/lock.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NVGPU_LOCK_H
+#define NVGPU_LOCK_H
+
+#include <nvgpu/lock_linux.h>
+
+/*
+ * struct nvgpu_mutex
+ *
+ * Should be implemented per-OS in a separate library
+ * But implementation should adhere to mutex implementation
+ * as specified in Linux Documentation
+ */
+struct nvgpu_mutex;
+
+/*
+ * struct nvgpu_spinlock
+ *
+ * Should be implemented per-OS in a separate library
+ * But implementation should adhere to spinlock implementation
+ * as specified in Linux Documentation
+ */
+struct nvgpu_spinlock;
+
+/*
+ * struct nvgpu_raw_spinlock
+ *
+ * Should be implemented per-OS in a separate library
+ * But implementation should adhere to raw_spinlock implementation
+ * as specified in Linux Documentation
+ */
+struct nvgpu_raw_spinlock;
+
+int nvgpu_mutex_init(struct nvgpu_mutex *mutex);
+void nvgpu_mutex_acquire(struct nvgpu_mutex *mutex);
+void nvgpu_mutex_release(struct nvgpu_mutex *mutex);
+int nvgpu_mutex_tryacquire(struct nvgpu_mutex *mutex);
+void nvgpu_mutex_destroy(struct nvgpu_mutex *mutex);
+
+void nvgpu_spinlock_init(struct nvgpu_spinlock *spinlock);
+void nvgpu_spinlock_acquire(struct nvgpu_spinlock *spinlock);
+void nvgpu_spinlock_release(struct nvgpu_spinlock *spinlock);
+
+void nvgpu_raw_spinlock_init(struct nvgpu_raw_spinlock *spinlock);
+void nvgpu_raw_spinlock_acquire(struct nvgpu_raw_spinlock *spinlock);
+void nvgpu_raw_spinlock_release(struct nvgpu_raw_spinlock *spinlock);
+
+#endif /* NVGPU_LOCK_H */