[PATCH 4/6] firmware: ti_sci.c: Add a function to request DM metadata using ti_sci* calls

[Moteen Shah]

Add a function to retrieve information of the DM firmware's ABI versions,
RM/PM HAL, firmware version, etc using TI_SCI protocol.

Signed-off-by: Moteen Shah <m-s...@ti.com>
---
 drivers/firmware/ti_sci.c | 54 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index bb9738efa81..8a8edc97e85 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -320,6 +320,59 @@ static int ti_sci_cmd_query_dm_cap(struct ti_sci_handle 
*handle, u64 *fw_caps)
        return 0;
 }
 
+/**
+ * ti_sci_cmd_get_dm_version() - command to get the DM version of the SCI
+ *                              entity
+ * @handle:    Pointer to TI SCI handle
+ * @dm_info:   Pointer to DM version information structure
+ *
+ * Return: 0 if all went fine, else return appropriate error.
+ */
+
+static int ti_sci_cmd_get_dm_version(struct ti_sci_handle *handle,
+                                    struct ti_sci_dm_version_info *dm_info)
+{
+       struct ti_sci_msg_dm_resp_version *ver_info;
+       struct ti_sci_msg_hdr hdr;
+       struct ti_sci_info *info;
+       struct ti_sci_xfer *xfer;
+       int ret;
+
+       if (IS_ERR(handle))
+               return PTR_ERR(handle);
+       if (!handle || !dm_info)
+               return -EINVAL;
+
+       info = handle_to_ti_sci_info(handle);
+
+       xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_DM_VERSION,
+                                    TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
+                                    (u32 *)&hdr, sizeof(struct ti_sci_msg_hdr),
+                                    sizeof(*ver_info));
+       if (IS_ERR(xfer)) {
+               ret = PTR_ERR(xfer);
+               return ret;
+       }
+
+       ret = ti_sci_do_xfer(info, xfer);
+       if (ret)
+               return ret;
+
+       ver_info = (struct ti_sci_msg_dm_resp_version *)xfer->tx_message.buf;
+
+       dm_info->abi_major = ver_info->abi_major;
+       dm_info->abi_minor = ver_info->abi_minor;
+       dm_info->dm_ver = ver_info->version;
+       dm_info->patch_ver = ver_info->patch_version;
+       dm_info->sub_ver = ver_info->sub_version;
+       strlcpy(dm_info->sci_server_version, ver_info->sci_server_version,
+               sizeof(ver_info->sci_server_version));
+       strlcpy(dm_info->rm_pm_hal_version, ver_info->rm_pm_hal_version,
+               sizeof(ver_info->rm_pm_hal_version));
+
+       return 0;
+}
+
 /**
  * ti_sci_cmd_get_revision() - command to get the revision of the SCI entity
  * @handle:    pointer to TI SCI handle
@@ -2738,6 +2791,7 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
        fwl_ops->get_fwl_region = ti_sci_cmd_get_fwl_region;
        fwl_ops->change_fwl_owner = ti_sci_cmd_change_fwl_owner;
 
+       fw_ops->get_dm_version = ti_sci_cmd_get_dm_version;
        fw_ops->query_dm_cap = ti_sci_cmd_query_dm_cap;
 }
 
-- 
2.34.1