There was a bug in ena_com_fill_hash_function(), which was causing bit to
be shifted left one bit too much.
To fix that, the ENA_FFS macro is being ussed (returning the location of
the first bit set), hash_function value is being subtracted by 1 if any
hash function is supported by the device and BIT macro is used for
shifting for better verbosity.
Signed-off-by: Michal Krawczyk <mk@semihalf.com>
---
v3:
* This patch was added - previously part of the v2-04
drivers/net/ena/base/ena_com.c | 19 +++++++++++++------
drivers/net/ena/base/ena_plat_dpdk.h | 2 ++
2 files changed, 15 insertions(+), 6 deletions(-)
@@ -2394,12 +2394,14 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
enum ena_admin_hash_functions func,
const u8 *key, u16 key_len, u32 init_val)
{
- struct ena_rss *rss = &ena_dev->rss;
+ struct ena_admin_feature_rss_flow_hash_control *hash_key;
struct ena_admin_get_feat_resp get_resp;
- struct ena_admin_feature_rss_flow_hash_control *hash_key =
- rss->hash_key;
+ enum ena_admin_hash_functions old_func;
+ struct ena_rss *rss = &ena_dev->rss;
int rc;
+ hash_key = rss->hash_key;
+
/* Make sure size is a mult of DWs */
if (unlikely(key_len & 0x3))
return ENA_COM_INVAL;
@@ -2411,7 +2413,7 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
if (unlikely(rc))
return rc;
- if (!((1 << func) & get_resp.u.flow_hash_func.supported_func)) {
+ if (!(BIT(func) & get_resp.u.flow_hash_func.supported_func)) {
ena_trc_err("Flow hash function %d isn't supported\n", func);
return ENA_COM_UNSUPPORTED;
}
@@ -2437,12 +2439,13 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
return ENA_COM_INVAL;
}
+ old_func = rss->hash_func;
rss->hash_func = func;
rc = ena_com_set_hash_function(ena_dev);
/* Restore the old function */
if (unlikely(rc))
- ena_com_get_hash_function(ena_dev, NULL, NULL);
+ rss->hash_func = old_func;
return rc;
}
@@ -2464,7 +2467,11 @@ int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
if (unlikely(rc))
return rc;
- rss->hash_func = get_resp.u.flow_hash_func.selected_func;
+ /* ENA_FFS returns 1 in case the lsb is set */
+ rss->hash_func = ENA_FFS(get_resp.u.flow_hash_func.selected_func);
+ if (rss->hash_func)
+ rss->hash_func--;
+
if (func)
*func = rss->hash_func;
@@ -301,6 +301,8 @@ extern rte_atomic32_t ena_alloc_cnt;
#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+#define ENA_FFS(x) ffs(x)
+
void ena_rss_key_fill(void *key, size_t size);
#define ENA_RSS_FILL_KEY(key, size) ena_rss_key_fill(key, size)