tzcom: Add support for modifying specific fields in cmd_buf
Allow client to send information to replace a specific field of
the cmd buffer with the physical address. This is done via a new
IOCTL, TZCOM_IOCTL_SEND_CMD_FD_REQ, which is used to import the
ion fd handle. This IOCTL takes in a new send_cmd_fd_op_req
structure that has the same format as send-cmd_op_req with a
new field added: an array of ion handles (ifd_data.fd) and
cmd_buf_offset.
The client sends in an array of ion fd handle along with the
offset to the command buffer field.
This new IOCTL allows a client to send information regarding
which field(s) (at cmd_buf_offset) in the cmd_buf to replace.
These field(s) are replaced with the physical addr of the
buffer addressed by the respective ifd_data.fd handle.
Change-Id: If210013d46e24776fe6f5c6aa257505b3b1e6e00
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
diff --git a/include/linux/tzcom.h b/include/linux/tzcom.h
index a1b3dfc..448ab2a 100644
--- a/include/linux/tzcom.h
+++ b/include/linux/tzcom.h
@@ -6,6 +6,7 @@
#include <linux/types.h>
#include <linux/ioctl.h>
+#define MAX_ION_FD 4
/**
* struct tzcom_register_svc_op_req - for register service ioctl request
* @svc_id - service id (shared between userspace and TZ)
@@ -49,6 +50,8 @@
/**
* struct tzcom_send_cmd_op_req - for send command ioctl request
* @cmd_id - command to execute on TZBSP side
+ * @ifd_data_fd - ion handle to some memory allocated in user space
+ * @cmd_buf_offset - command buffer offset
* @cmd_len - command buffer length
* @cmd_buf - command buffer
* @resp_len - response buffer length
@@ -63,6 +66,34 @@
};
/**
+ * struct tzcom_ion_fd_info - ion fd handle data information
+ * @fd - ion handle to some memory allocated in user space
+ * @cmd_buf_offset - command buffer offset
+ */
+struct tzcom_ion_fd_info {
+ int32_t fd;
+ uint32_t cmd_buf_offset;
+};
+
+/**
+ * struct tzcom_send_cmd_op_req - for send command ioctl request
+ * @cmd_id - command to execute on TZBSP side
+ * @ifd_data_fd - ion handle to some memory allocated in user space
+ * @cmd_buf_offset - command buffer offset
+ * @cmd_len - command buffer length
+ * @cmd_buf - command buffer
+ * @resp_len - response buffer length
+ * @resp_buf - response buffer
+ */
+struct tzcom_send_cmd_fd_op_req {
+ uint32_t cmd_id; /* in */
+ struct tzcom_ion_fd_info ifd_data[MAX_ION_FD];
+ unsigned int cmd_len; /* in */
+ void *cmd_buf; /* in */
+ unsigned int resp_len; /* in/out */
+ void *resp_buf; /* in/out */
+};
+/**
* struct tzcom_cont_cmd_op_req - for continue command ioctl request. used
* as a trigger from HLOS service to notify TZCOM that it's done with its
* operation and provide the response for TZCOM can continue the incomplete
@@ -99,5 +130,7 @@
_IOWR(TZCOM_IOC_MAGIC, 5, struct tzcom_cont_cmd_op_req)
#define TZCOM_IOCTL_ABORT_REQ _IO(TZCOM_IOC_MAGIC, 6)
-
+/* For TZ service */
+#define TZCOM_IOCTL_SEND_CMD_FD_REQ \
+ _IOWR(TZCOM_IOC_MAGIC, 7, struct tzcom_send_cmd_fd_op_req)
#endif /* __TZCOM_H_ */