DCE-KMD: Update DCE OS abstraction - Part 1

- We will keep single abstraction layer for linux.
    - File: dce-os-*
    - Fn: dce_os_*()

Modules covered in this CL:
1) dce-os-types
2) dce-os-atomic
3) dce-os-utils
4) dce-os-device
    - This is renamed to dce-linux-device in
      I74e2deb17f49065d242bd80d50c5a849b3dfa3a1

JIRA TDS-16126

Change-Id: I2d5eb45da4f245c1491645b27e2be9141bc038df
Signed-off-by: anupamg <anupamg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3228474
Reviewed-by: Mahesh Kumar <mahkumar@nvidia.com>
Reviewed-by: Arun Swain <arswain@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>

drivers/platform/tegra/dce/os/linux/include/dce-os-atomic.h

@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ */
+
+#ifndef DCE_OS_ATOMIC_H
+#define DCE_OS_ATOMIC_H
+
+#include <linux/atomic.h>
+
+/** 32 bit atomic variable. */
+typedef atomic_t dce_os_atomic_t;
+
+static inline void dce_os_atomic_set(dce_os_atomic_t *v, int i)
+{
+	atomic_set(v, i);
+}
+
+static inline int dce_os_atomic_read(dce_os_atomic_t *v)
+{
+	return atomic_read(v);
+}
+
+static inline int dce_os_atomic_add_unless(dce_os_atomic_t *v, int a, int u)
+{
+	return atomic_add_unless(v, a, u);
+}
+
+#endif /* DCE_OS_ATOMIC_H */

drivers/platform/tegra/dce/os/linux/include/dce-os-device.h

@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ */
+
+#ifndef DCE_OS_DEVICE_H
+#define DCE_OS_DEVICE_H
+
+#include <linux/cdev.h>
+#include <linux/types.h>
+#include <dce.h>
+
+/**
+ * struct dce_os_device - DCE data structure for storing
+ * OS device specific info.
+ */
+struct dce_os_device {
+	/**
+	 * @d : OS agnostic dce struct. Stores all runitme info for dce cluster
+	 * elements.
+	 */
+	struct tegra_dce d;
+	/**
+	 * @dev : Pointer to DCE Cluster's Linux device struct.
+	 */
+	struct device *dev;
+	/**
+	 * @pdata : Pointer to dce platform data struct.
+	 */
+	struct dce_platform_data *pdata;
+	/**
+	 * @max_cpu_irqs : stores maximum no. os irqs from DCE cluster to CPU
+	 * for this platform.
+	 */
+	u8 max_cpu_irqs;
+	/**
+	 * @regs : Stores the cpu-mapped base address of DCE Cluster. Will be
+	 * used for MMIO transactions to DCE elements.
+	 */
+	void __iomem *regs;
+#ifdef CONFIG_DEBUG_FS
+	/**
+	 * @debugfs : Debugfs node for DCE Linux device.
+	 */
+	struct dentry *debugfs;
+	/**
+	 * @ext_test_status : Return code for external client tests run via
+	 * debugfs
+	 */
+	s32 ext_test_status;
+#endif
+};
+
+/**
+ * dce_os_device_from_dce - inline function to get linux os data from the
+ *		os agnostic struct tegra_dc
+ * @d : Pointer to the os agnostic tegra_dce data structure.
+ *
+ * Return : pointer to struct dce_os_device
+ */
+static inline struct dce_os_device *dce_os_device_from_dce(struct tegra_dce *d)
+{
+	return container_of(d, struct dce_os_device, d);
+}
+
+/**
+ * dev_from_dce - inline function to get linux device from the
+ *		os agnostic struct tegra_dce
+ * @d : Pointer to the os agnostic tegra_dce data structure.
+ *
+ * Return : pointer to struct device
+ */
+static inline struct device *dev_from_dce(struct tegra_dce *d)
+{
+	return dce_os_device_from_dce(d)->dev;
+}
+
+/**
+ * pdata_from_dce - inline function to get dce platform data from
+ *		the os agnostic struct tegra_dc.
+ *
+ * @d : Pointer to the os agnostic tegra_dce data structure.
+ *
+ * Return : pointer to struct device
+ */
+static inline struct dce_platform_data *pdata_from_dce(struct tegra_dce *d)
+{
+	return ((struct dce_os_device *)dev_get_drvdata(dev_from_dce(d)))->pdata;
+}
+
+#endif /* DCE_OS_DEVICE_H */

drivers/platform/tegra/dce/os/linux/include/dce-os-types.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ */
+
+#ifndef DCE_OS_TYPES_H
+#define DCE_OS_TYPES_H
+
+#include <linux/types.h>
+
+#endif /* DCE_OS_TYPES_H */