Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 157 insertions, 0 deletions

diff --git a/net/ethtool/rss.c b/net/ethtool/rss.c
new file mode 100644
index 0000000000..5764202e6c
--- /dev/null
+++ b/net/ethtool/rss.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+
+struct rss_req_info {
+	struct ethnl_req_info		base;
+	u32				rss_context;
+};
+
+struct rss_reply_data {
+	struct ethnl_reply_data		base;
+	u32				indir_size;
+	u32				hkey_size;
+	u32				hfunc;
+	u32				*indir_table;
+	u8				*hkey;
+};
+
+#define RSS_REQINFO(__req_base) \
+	container_of(__req_base, struct rss_req_info, base)
+
+#define RSS_REPDATA(__reply_base) \
+	container_of(__reply_base, struct rss_reply_data, base)
+
+const struct nla_policy ethnl_rss_get_policy[] = {
+	[ETHTOOL_A_RSS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
+	[ETHTOOL_A_RSS_CONTEXT] = { .type = NLA_U32 },
+};
+
+static int
+rss_parse_request(struct ethnl_req_info *req_info, struct nlattr **tb,
+		  struct netlink_ext_ack *extack)
+{
+	struct rss_req_info *request = RSS_REQINFO(req_info);
+
+	if (tb[ETHTOOL_A_RSS_CONTEXT])
+		request->rss_context = nla_get_u32(tb[ETHTOOL_A_RSS_CONTEXT]);
+
+	return 0;
+}
+
+static int
+rss_prepare_data(const struct ethnl_req_info *req_base,
+		 struct ethnl_reply_data *reply_base,
+		 const struct genl_info *info)
+{
+	struct rss_reply_data *data = RSS_REPDATA(reply_base);
+	struct rss_req_info *request = RSS_REQINFO(req_base);
+	struct net_device *dev = reply_base->dev;
+	const struct ethtool_ops *ops;
+	u32 total_size, indir_bytes;
+	u8 dev_hfunc = 0;
+	u8 *rss_config;
+	int ret;
+
+	ops = dev->ethtool_ops;
+	if (!ops->get_rxfh)
+		return -EOPNOTSUPP;
+
+	/* Some drivers don't handle rss_context */
+	if (request->rss_context && !ops->get_rxfh_context)
+		return -EOPNOTSUPP;
+
+	ret = ethnl_ops_begin(dev);
+	if (ret < 0)
+		return ret;
+
+	data->indir_size = 0;
+	data->hkey_size = 0;
+	if (ops->get_rxfh_indir_size)
+		data->indir_size = ops->get_rxfh_indir_size(dev);
+	if (ops->get_rxfh_key_size)
+		data->hkey_size = ops->get_rxfh_key_size(dev);
+
+	indir_bytes = data->indir_size * sizeof(u32);
+	total_size = indir_bytes + data->hkey_size;
+	rss_config = kzalloc(total_size, GFP_KERNEL);
+	if (!rss_config) {
+		ret = -ENOMEM;
+		goto out_ops;
+	}
+
+	if (data->indir_size)
+		data->indir_table = (u32 *)rss_config;
+
+	if (data->hkey_size)
+		data->hkey = rss_config + indir_bytes;
+
+	if (request->rss_context)
+		ret = ops->get_rxfh_context(dev, data->indir_table, data->hkey,
+					    &dev_hfunc, request->rss_context);
+	else
+		ret = ops->get_rxfh(dev, data->indir_table, data->hkey,
+				    &dev_hfunc);
+
+	if (ret)
+		goto out_ops;
+
+	data->hfunc = dev_hfunc;
+out_ops:
+	ethnl_ops_complete(dev);
+	return ret;
+}
+
+static int
+rss_reply_size(const struct ethnl_req_info *req_base,
+	       const struct ethnl_reply_data *reply_base)
+{
+	const struct rss_reply_data *data = RSS_REPDATA(reply_base);
+	int len;
+
+	len = nla_total_size(sizeof(u32)) +	/* _RSS_HFUNC */
+	      nla_total_size(sizeof(u32) * data->indir_size) + /* _RSS_INDIR */
+	      nla_total_size(data->hkey_size);	/* _RSS_HKEY */
+
+	return len;
+}
+
+static int
+rss_fill_reply(struct sk_buff *skb, const struct ethnl_req_info *req_base,
+	       const struct ethnl_reply_data *reply_base)
+{
+	const struct rss_reply_data *data = RSS_REPDATA(reply_base);
+
+	if ((data->hfunc &&
+	     nla_put_u32(skb, ETHTOOL_A_RSS_HFUNC, data->hfunc)) ||
+	    (data->indir_size &&
+	     nla_put(skb, ETHTOOL_A_RSS_INDIR,
+		     sizeof(u32) * data->indir_size, data->indir_table)) ||
+	    (data->hkey_size &&
+	     nla_put(skb, ETHTOOL_A_RSS_HKEY, data->hkey_size, data->hkey)))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static void rss_cleanup_data(struct ethnl_reply_data *reply_base)
+{
+	const struct rss_reply_data *data = RSS_REPDATA(reply_base);
+
+	kfree(data->indir_table);
+}
+
+const struct ethnl_request_ops ethnl_rss_request_ops = {
+	.request_cmd		= ETHTOOL_MSG_RSS_GET,
+	.reply_cmd		= ETHTOOL_MSG_RSS_GET_REPLY,
+	.hdr_attr		= ETHTOOL_A_RSS_HEADER,
+	.req_info_size		= sizeof(struct rss_req_info),
+	.reply_data_size	= sizeof(struct rss_reply_data),
+
+	.parse_request		= rss_parse_request,
+	.prepare_data		= rss_prepare_data,
+	.reply_size		= rss_reply_size,
+	.fill_reply		= rss_fill_reply,
+	.cleanup_data		= rss_cleanup_data,
+};