securemsm-kernel: Add the UAPI headers for the SMMU proxy driver

Add the UAPI headers for the SMMU proxy driver and make them usable in
Android.

Change-Id: Ibea130d79631f4d973e957a43dffde27fc472035
Signed-off-by: Chris Goldsworthy <[email protected]>

Android.bp

@@ -40,3 +40,9 @@ cc_library_headers {
     vendor: true,
     recovery_available: true
 }
+
+cc_library_headers {
+    name: "smmu_proxy_uapi_header",
+    vendor_available: true,
+    export_include_dirs: ["smmu-proxy/uapi/"],
+}

smmu-proxy/uapi/linux/qti-smmu-proxy.h

@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+#ifndef __QTI_SMMU_PROXY_UAPI_H_
+#define __QTI_SMMU_PROXY_UAPI_H_
+
+#include <linux/types.h>
+
+#define QTI_SMMU_PROXY_CAMERA_CB 0
+#define QTI_SMMU_PROXY_DISPLAY_CB 1
+#define QTI_SMMU_PROXY_EVA_CB 2
+
+#define QTI_SMMU_PROXY_IOC_BASE 0x55
+
+struct csf_version {
+	__u32 arch_ver;
+	__u32 max_ver;
+	__u32 min_ver;
+	__u32 padding;
+};
+
+#define QTI_SMMU_PROXY_GET_VERSION_IOCTL	_IOR(QTI_SMMU_PROXY_IOC_BASE, 0, \
+						     struct csf_version)
+
+struct smmu_proxy_acl_ctl {
+	__u32 dma_buf_fd;
+	__u32 padding;
+};
+
+#define QTI_SMMU_PROXY_AC_LOCK_BUFFER	_IOW(QTI_SMMU_PROXY_IOC_BASE, 1, \
+					     struct smmu_proxy_acl_ctl)
+#define QTI_SMMU_PROXY_AC_UNLOCK_BUFFER	_IOW(QTI_SMMU_PROXY_IOC_BASE, 2, \
+					     struct smmu_proxy_acl_ctl)
+
+struct smmu_proxy_wipe_buf_ctl {
+	__u32 smmu_context_bank_id;
+	__u32 padding;
+};
+
+#define QTI_SMMU_PROXY_WIPE_BUFFERS	_IOW(QTI_SMMU_PROXY_IOC_BASE, 3, \
+					     struct smmu_proxy_wipe_buf_ctl)
+
+struct smmu_proxy_get_dma_buf_ctl {
+	/*
+	 * memparcel_hdl only needs to be 32-bit for Gunyah, but a 64-bit value
+	 * is needed to remain forward compatible with FF-A .
+	 */
+	__u64 memparcel_hdl;
+	__u32 dma_buf_fd;
+	__u32 padding;
+};
+
+#define QTI_SMMU_PROXY_GET_DMA_BUF	_IOWR(QTI_SMMU_PROXY_IOC_BASE, 4, \
+					      struct smmu_proxy_get_dma_buf_ctl)
+
+#endif /* __QTI_SMMU_PROXY_UAPI_H_ */