ti_sci_* : Add capability to access DM firmware's metadata

Introduce response and request structs to receive and request
information regarding DM version, etc from TI SCI.

Signed-off-by: Moteen Shah <m-shah@ti.com>
Reviewed-by: Neha Malcom Francis <n-francis@ti.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>

diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h
index 292f7cd..ce50bf6 100644 (file)
--- a/drivers/firmware/ti_sci.h
+++ b/drivers/firmware/ti_sci.h
@@ -26,6 +26,7 @@
 #define TI_SCI_MSG_BOARD_CONFIG_RM     0x000c
 #define TI_SCI_MSG_BOARD_CONFIG_SECURITY  0x000d
 #define TI_SCI_MSG_BOARD_CONFIG_PM     0x000e
+#define TI_SCI_MSG_DM_VERSION          0x000f
 #define TISCI_MSG_QUERY_MSMC           0x0020
 #define TI_SCI_MSG_QUERY_FW_CAPS       0x0022
 
@@ -135,6 +136,34 @@ struct ti_sci_msg_resp_version {
        u8 abi_minor;
 } __packed;
 
+/**
+ * struct ti_sci_msg_dm_resp_version - Response for a message
+ * @hdr:               Generic header
+ * @version:           Version number of the firmware
+ * @sub_version:       Sub-version number of the firmware
+ * @patch_version:     Patch version number of the firmware
+ * @abi_major:         Major version of the ABI that firmware supports
+ * @abi_minor:         Minor version of the ABI that firmware supports
+ * @sci_server_version: String describing the SCI server version
+ * @rm_pm_hal_version:  String describing the RM PM HAL version
+ *
+ * In general, ABI version changes follow the rule that minor version increments
+ * are backward compatible. Major revision changes in ABI may not be
+ * backward compatible.
+ *
+ * Response to a message with message type TI_SCI_MSG_DM_VERSION
+ */
+struct ti_sci_msg_dm_resp_version {
+       struct ti_sci_msg_hdr hdr;
+       u16     version;
+       u8      sub_version;
+       u8      patch_version;
+       u8      abi_major;
+       u8      abi_minor;
+       char rm_pm_hal_version[12];
+       char sci_server_version[26];
+} __packed;
+
 /**
  * struct ti_sci_query_fw_caps_resp - Response for a message
  * @hdr:       Generic header

diff --git a/include/linux/soc/ti/ti_sci_protocol.h b/include/linux/soc/ti/ti_sci_protocol.h
index f967077..5269676 100644 (file)
--- a/include/linux/soc/ti/ti_sci_protocol.h
+++ b/include/linux/soc/ti/ti_sci_protocol.h
@@ -30,6 +30,28 @@ struct ti_sci_version_info {
        char firmware_description[32];
 };
 
+/**
+ * struct ti_sci_dm_version_info - version information structure
+ * @abi_major:         Major ABI version. Change here implies risk of backward
+ *                     compatibility break.
+ * @abi_minor:         Minor ABI version. Change here implies new feature addition,
+ *                     or compatible change in ABI.
+ * @patch_ver:         Patch version of the firmware.
+ * @sub_ver:           Sub-version of the firmware.
+ * @dm_ver:            DM version.
+ * @sci_server_version: Version string of the SCI server.
+ * @rm_pm_hal_version:  Version string of the RM PM HAL.
+ */
+struct ti_sci_dm_version_info {
+       u8 abi_major;
+       u8 abi_minor;
+       u8 patch_ver;
+       u8 sub_ver;
+       u16 dm_ver;
+       char rm_pm_hal_version[12];
+       char sci_server_version[26];
+};
+
 struct ti_sci_handle;
 
 /**
@@ -265,10 +287,14 @@ struct ti_sci_core_ops {
  * struct ti_sci_firmware_ops - DM firmware operations
  * @query_dm_cap: Query the DM capabilities
  *                Return 0 for successful query else appropriate error value.
+ * @get_dm_version: Get the DM version.
+ *                  Return 0 for successful request else appropriate error value.
  */
 struct ti_sci_firmware_ops {
        int (*query_dm_cap)(struct ti_sci_handle *handle,
                            u64 *dm_cap);
+       int (*get_dm_version)(struct ti_sci_handle *handle,
+                             struct ti_sci_dm_version_info *get_dm_version);
 };
 
 #define TI_SCI_MSG_FLAG_FW_CAP_DM      0x100