[RFC PATCH net-next 4/9] ethtool: Add flashing transceiver modules' firmware notifications ability

[Danielle Ratson <danieller@nvidia.com>]

Add progress notifications ability to user space while flashing modules'
firmware by implementing the interface between the user space and the
kernel.

Signed-off-by: Danielle Ratson <danieller@nvidia.com>
---
 net/ethtool/module.c    | 76 +++++++++++++++++++++++++++++++++++++++++
 net/ethtool/module_fw.h | 10 ++++++
 2 files changed, 86 insertions(+)
 create mode 100644 net/ethtool/module_fw.h

diff --git a/net/ethtool/module.c b/net/ethtool/module.c
index ceb575efc290..09cf11564840 100644
--- a/net/ethtool/module.c
+++ b/net/ethtool/module.c
@@ -5,6 +5,7 @@
 #include "netlink.h"
 #include "common.h"
 #include "bitset.h"
+#include "module_fw.h"
 
 struct module_req_info {
 	struct ethnl_req_info base;
@@ -158,3 +159,78 @@ const struct ethnl_request_ops ethnl_module_request_ops = {
 	.set			= ethnl_set_module,
 	.set_ntf_cmd		= ETHTOOL_MSG_MODULE_NTF,
 };
+
+/* MODULE_FW_FLASH_NTF */
+
+static void
+ethnl_module_fw_flash_ntf(struct net_device *dev,
+			  enum ethtool_module_fw_flash_status status,
+			  const char *status_msg, u64 done, u64 total)
+{
+	struct sk_buff *skb;
+	void *hdr;
+	int ret;
+
+	skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+	if (!skb)
+		return;
+
+	hdr = ethnl_bcastmsg_put(skb, ETHTOOL_MSG_MODULE_FW_FLASH_NTF);
+	if (!hdr)
+		goto err_skb;
+
+	ret = ethnl_fill_reply_header(skb, dev,
+				      ETHTOOL_A_MODULE_FW_FLASH_HEADER);
+	if (ret < 0)
+		goto err_skb;
+
+	if (nla_put_u8(skb, ETHTOOL_A_MODULE_FW_FLASH_STATUS, status))
+		goto err_skb;
+
+	if (status_msg &&
+	    nla_put_string(skb, ETHTOOL_A_MODULE_FW_FLASH_STATUS_MSG,
+			   status_msg))
+		goto err_skb;
+
+	if (nla_put_u64_64bit(skb, ETHTOOL_A_MODULE_FW_FLASH_DONE, done,
+			      ETHTOOL_A_MODULE_FW_FLASH_PAD))
+		goto err_skb;
+
+	if (nla_put_u64_64bit(skb, ETHTOOL_A_MODULE_FW_FLASH_TOTAL,
+			      total, ETHTOOL_A_MODULE_FW_FLASH_PAD))
+		goto err_skb;
+
+	genlmsg_end(skb, hdr);
+	ethnl_multicast(skb, dev);
+	return;
+
+err_skb:
+	nlmsg_free(skb);
+}
+
+void ethnl_module_fw_flash_ntf_err(struct net_device *dev,
+				   const char *status_msg)
+{
+	ethnl_module_fw_flash_ntf(dev, ETHTOOL_MODULE_FW_FLASH_STATUS_ERROR,
+				  status_msg, 0, 0);
+}
+
+void ethnl_module_fw_flash_ntf_start(struct net_device *dev)
+{
+	ethnl_module_fw_flash_ntf(dev, ETHTOOL_MODULE_FW_FLASH_STATUS_STARTED,
+				  NULL, 0, 0);
+}
+
+void ethnl_module_fw_flash_ntf_complete(struct net_device *dev)
+{
+	ethnl_module_fw_flash_ntf(dev, ETHTOOL_MODULE_FW_FLASH_STATUS_COMPLETED,
+				  NULL, 0, 0);
+}
+
+void ethnl_module_fw_flash_ntf_in_progress(struct net_device *dev, u64 done,
+					   u64 total)
+{
+	ethnl_module_fw_flash_ntf(dev,
+				  ETHTOOL_MODULE_FW_FLASH_STATUS_IN_PROGRESS,
+				  NULL, done, total);
+}
diff --git a/net/ethtool/module_fw.h b/net/ethtool/module_fw.h
new file mode 100644
index 000000000000..36cb0bc85526
--- /dev/null
+++ b/net/ethtool/module_fw.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <uapi/linux/ethtool.h>
+
+void ethnl_module_fw_flash_ntf_err(struct net_device *dev,
+				   const char *status_msg);
+void ethnl_module_fw_flash_ntf_start(struct net_device *dev);
+void ethnl_module_fw_flash_ntf_complete(struct net_device *dev);
+void ethnl_module_fw_flash_ntf_in_progress(struct net_device *dev, u64 done,
+					   u64 total);
-- 
2.40.1