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Message-ID: <1584362304-274-4-git-send-email-akiyano@amazon.com>
Date: Mon, 16 Mar 2020 14:38:20 +0200
From: <akiyano@...zon.com>
To: <davem@...emloft.net>, <netdev@...r.kernel.org>
CC: Arthur Kiyanovski <akiyano@...zon.com>, <dwmw@...zon.com>,
<zorik@...zon.com>, <matua@...zon.com>, <saeedb@...zon.com>,
<msw@...zon.com>, <aliguori@...zon.com>, <nafea@...zon.com>,
<gtzalik@...zon.com>, <netanel@...zon.com>, <alisaidi@...zon.com>,
<benh@...zon.com>, <ndagan@...zon.com>, <shayagr@...zon.com>,
<sameehj@...zon.com>
Subject: [PATCH V1 net 3/7] net: ena: fix inability to set RSS hash function without changing the key
From: Arthur Kiyanovski <akiyano@...zon.com>
Current code does not allow setting the hash function without
changing the key. This commit enables it.
To achieve this we separate ena_com_get_hash_function() into 2 functions:
ena_com_get_hash_function() - which gets only the hash function, and
ena_com_get_hash_key() - which gets only the hash key.
Also return 0 instead of rc at the end of ena_get_rxfh() since all
previous operations succeeded.
Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@...zon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@...zon.com>
---
drivers/net/ethernet/amazon/ena/ena_com.c | 13 ++++++++----
drivers/net/ethernet/amazon/ena/ena_com.h | 21 +++++++++++++------
drivers/net/ethernet/amazon/ena/ena_ethtool.c | 10 ++++-----
3 files changed, 29 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index e648773e3d11..340e5a288ff9 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -2342,13 +2342,10 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
}
int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
- enum ena_admin_hash_functions *func,
- u8 *key)
+ enum ena_admin_hash_functions *func)
{
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_get_feat_resp get_resp;
- struct ena_admin_feature_rss_flow_hash_control *hash_key =
- rss->hash_key;
int rc;
rc = ena_com_get_feature_ex(ena_dev, &get_resp,
@@ -2366,6 +2363,14 @@ int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
if (func)
*func = rss->hash_func;
+ return 0;
+}
+
+int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key)
+{
+ struct ena_admin_feature_rss_flow_hash_control *hash_key =
+ ena_dev->rss.hash_key;
+
if (key)
memcpy(key, hash_key->key, (size_t)(hash_key->keys_num) << 2);
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index 469f298199a7..e2e2fd1dc820 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -695,13 +695,11 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
*/
int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
-/* ena_com_get_hash_function - Retrieve the hash function and the hash key
- * from the device.
+/* ena_com_get_hash_function - Retrieve the hash function from the device.
* @ena_dev: ENA communication layer struct
* @func: hash function
- * @key: hash key
*
- * Retrieve the hash function and the hash key from the device.
+ * Retrieve the hash function from the device.
*
* @note: If the caller called ena_com_fill_hash_function but didn't flash
* it to the device, the new configuration will be lost.
@@ -709,9 +707,20 @@ int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
* @return: 0 on Success and negative value otherwise.
*/
int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
- enum ena_admin_hash_functions *func,
- u8 *key);
+ enum ena_admin_hash_functions *func);
+/* ena_com_get_hash_key - Retrieve the hash key
+ * @ena_dev: ENA communication layer struct
+ * @key: hash key
+ *
+ * Retrieve the hash key.
+ *
+ * @note: If the caller called ena_com_fill_hash_key but didn't flash
+ * it to the device, the new configuration will be lost.
+ *
+ * @return: 0 on Success and negative value otherwise.
+ */
+int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key);
/* ena_com_fill_hash_ctrl - Fill RSS hash control
* @ena_dev: ENA communication layer struct.
* @proto: The protocol to configure.
diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
index ced1d577b62a..d1a320b1774d 100644
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -673,8 +673,7 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
/* We call this function in order to check if the device
* supports getting/setting the hash function.
*/
- rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func, key);
-
+ rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func);
if (rc) {
if (rc == -EOPNOTSUPP) {
key = NULL;
@@ -685,6 +684,7 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
return rc;
}
+ rc = ena_com_get_hash_key(adapter->ena_dev, key);
if (rc)
return rc;
@@ -704,7 +704,7 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
if (hfunc)
*hfunc = func;
- return rc;
+ return 0;
}
static int ena_set_rxfh(struct net_device *netdev, const u32 *indir,
@@ -712,7 +712,7 @@ static int ena_set_rxfh(struct net_device *netdev, const u32 *indir,
{
struct ena_adapter *adapter = netdev_priv(netdev);
struct ena_com_dev *ena_dev = adapter->ena_dev;
- enum ena_admin_hash_functions func;
+ enum ena_admin_hash_functions func = 0;
int rc, i;
if (indir) {
@@ -751,7 +751,7 @@ static int ena_set_rxfh(struct net_device *netdev, const u32 *indir,
return -EOPNOTSUPP;
}
- if (key) {
+ if (key || func) {
rc = ena_com_fill_hash_function(ena_dev, func, key,
ENA_HASH_KEY_SIZE,
0xFFFFFFFF);
--
2.17.1
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