platform: msm: add Per-File-Tagger (PFT) driver

Integrated from msm-3.14. Additional fixes were made to compile with the
new kernel and various new warnings and checkpatch issues were fixed

Change-Id: I073db1041e41eac9066e37ee099f1da9e4eed6c0
Signed-off-by: Andrey Markovytch <andreym@codeaurora.org>
[gbroner@codeaurora.org: fixed merge conflict and adapted the LSM
security hooks]
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>

2 files changed, 135 insertions, 0 deletions

diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 4c0fd6369a76..16b7e327818d 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -302,6 +302,7 @@ header-y += msm_audio_alac.h
 header-y += msm_audio_ape.h
 header-y += msm_ion.h
 header-y += msm_kgsl.h
+header-y += msm_pft.h
 header-y += msm_mdp.h
 header-y += msm_mdp_ext.h
 header-y += msm_rmnet.h
diff --git a/include/uapi/linux/msm_pft.h b/include/uapi/linux/msm_pft.h
new file mode 100644
index 000000000000..1127337eb5de
--- /dev/null
+++ b/include/uapi/linux/msm_pft.h
@@ -0,0 +1,134 @@
+/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#ifndef MSM_PFT_H_
+#define MSM_PFT_H_
+
+#include <linux/types.h>
+
+/**
+ *  enum pft_command_opcode - PFT driver command ID
+ *
+ *  @PFT_CMD_OPCODE_SET_STATE -
+ *      command ID to set PFT driver state
+ *  @PFT_CMD_OPCODE_UPDATE_REG_APP_UID -
+ *      command ID to update the list of registered application
+ *      UID
+ *  @PFT_CMD_OPCODE_PERFORM_IN_PLACE_FILE_ENC -
+ *      command ID to perfrom in-place file encryption
+ */
+enum pft_command_opcode {
+	PFT_CMD_OPCODE_SET_STATE,
+	PFT_CMD_OPCODE_UPDATE_REG_APP_UID,
+	PFT_CMD_OPCODE_PERFORM_IN_PLACE_FILE_ENC,
+	/* */
+	PFT_CMD_OPCODE_MAX_COMMAND_INDEX
+};
+
+/**
+ * enum pft_state - PFT driver operational states
+ *
+ * @PFT_STATE_DEACTIVATED - driver is deativated.
+ * @PFT_STATE_DEACTIVATING - driver is in the process of being deativated.
+ * @PFT_STATE_KEY_REMOVED - driver is active but no encryption key is loaded.
+ * @PFT_STATE_REMOVING_KEY - driver is active, but the encryption key is being
+ *      removed.
+ * @PFT_STATE_KEY_LOADED - driver is active, and the encryption key is loaded
+ *      to encryption block, hence registered apps can perform file operations
+ *      on encrypted files.
+ */
+enum pft_state {
+	PFT_STATE_DEACTIVATED,
+	PFT_STATE_DEACTIVATING,
+	PFT_STATE_KEY_REMOVED,
+	PFT_STATE_REMOVING_KEY,
+	PFT_STATE_KEY_LOADED,
+	/* Internal */
+	PFT_STATE_MAX_INDEX
+};
+
+/**
+ * enum pft_command_response_code - PFT response on the previous
+ * command
+ *
+ * @PFT_CMD_RESP_SUCCESS - The command was properly processed
+ *      without an error.
+ * @PFT_CMD_RESP_GENERAL_ERROR -
+ *      Indicates an error that cannot be better described by a
+ *      more specific errors below.
+ * @PFT_CMD_RESP_INVALID_COMMAND - Invalid or unsupported
+ *      command id.
+ * @PFT_CMD_RESP_INVALID_CMD_PARAMS - Invalid command
+ *	parameters.
+ * @PFT_CMD_RESP_INVALID_STATE - Invalid state
+ * @PFT_CMD_RESP_ALREADY_IN_STATE - Used to indicates that
+ *      the new state is equal to the existing one.
+ * @PFT_CMD_RESP_INPLACE_FILE_IS_OPEN - Used to indicates
+ *      that the file that should be encrypted is already open
+ *      and can be encrypted.
+ * @PFT_CMD_RESP_ENT_FILES_CLOSING_FAILURE
+ *	Indicates about failure of the PFT to close Enterprise files
+ * @PFT_CMD_RESP_MAX_INDEX
+ */
+enum pft_command_response_code {
+	PFT_CMD_RESP_SUCCESS,
+	PFT_CMD_RESP_GENERAL_ERROR,
+	PFT_CMD_RESP_INVALID_COMMAND,
+	PFT_CMD_RESP_INVALID_CMD_PARAMS,
+	PFT_CMD_RESP_INVALID_STATE,
+	PFT_CMD_RESP_ALREADY_IN_STATE,
+	PFT_CMD_RESP_INPLACE_FILE_IS_OPEN,
+	PFT_CMD_RESP_ENT_FILES_CLOSING_FAILURE,
+	/* Internal */
+	PFT_CMD_RESP_MAX_INDEX
+};
+
+/**
+ * struct pft_command_response - response structure
+ *
+ * @command_id - see enum pft_command_response_code
+ * @error_codee - see enum pft_command_response_code
+ */
+struct pft_command_response {
+	__u32 command_id;
+	__u32 error_code;
+};
+
+/**
+ * struct pft_command - pft command
+ *
+ * @opcode - see enum pft_command_opcode.
+ * @set_state.state - see enum pft_state.
+ * @update_app_list.count - number of items in the
+ *      registered applications list.
+ * @update_app_list.table - registered applications array
+ * @preform_in_place_file_enc.file_descriptor - file descriptor
+ *      of the opened file to be in-placed encrypted.
+ */
+struct pft_command {
+	__u32 opcode;
+	union {
+		struct {
+			/* @see pft_state */
+			__u32 state;
+		} set_state;
+		struct {
+			__u32 items_count; /* number of items */
+			uid_t table[0]; /* array of UIDs */
+		} update_app_list;
+		struct {
+			__u32 file_descriptor;
+		} preform_in_place_file_enc;
+	};
+};
+
+#endif /* MSM_PFT_H_ */