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net: ena: allow setting the hash function without changing the key

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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() to 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.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sameeh Jubran 2020-05-03 09:52:12 +00:00 committed by David S. Miller
parent e9a1de378d
commit f66c2ea3b1
3 changed files with 32 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/net/ethernet/amazon/ena/ena_com.c
View File

@ -2338,13 +2338,10 @@ 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;
if (unlikely(!func))
@ -2364,6 +2361,14 @@ int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
*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);

21
drivers/net/ethernet/amazon/ena/ena_com.h
View File

@ -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.

12
drivers/net/ethernet/amazon/ena/ena_ethtool.c
View File

@ -672,7 +672,7 @@ 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;
@ -683,6 +683,10 @@ 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;
switch (ena_func) {
case ENA_ADMIN_TOEPLITZ:
func = ETH_RSS_HASH_TOP;
@ -699,7 +703,7 @@ 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,
@ -707,7 +711,7 @@ 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) {
@ -746,7 +750,7 @@ 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);