iwlwifi: mvm: improve RSS configuration

Improve current RSS configuration:
 * Use netdev_rss_key instead of keeping a local copy.
 * Configure also UDP hashing to have UDP traffic spread across queues.
 * Do not direct RSS traffic to our fallback queue.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index abc16f7..362a546 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -65,6 +65,7 @@
  *****************************************************************************/
 #include <linux/vmalloc.h>
 #include <linux/ieee80211.h>
+#include <linux/netdevice.h>
 
 #include "mvm.h"
 #include "fw-dbg.h"
@@ -880,8 +881,10 @@ static ssize_t iwl_dbgfs_indirection_tbl_write(struct iwl_mvm *mvm,
        struct iwl_rss_config_cmd cmd = {
                .flags = cpu_to_le32(IWL_RSS_ENABLE),
                .hash_mask = IWL_RSS_HASH_TYPE_IPV4_TCP |
+                            IWL_RSS_HASH_TYPE_IPV4_UDP |
                             IWL_RSS_HASH_TYPE_IPV4_PAYLOAD |
                             IWL_RSS_HASH_TYPE_IPV6_TCP |
+                            IWL_RSS_HASH_TYPE_IPV6_UDP |
                             IWL_RSS_HASH_TYPE_IPV6_PAYLOAD,
        };
        int ret, i, num_repeats, nbytes = count / 2;
@@ -905,7 +908,7 @@ static ssize_t iwl_dbgfs_indirection_tbl_write(struct iwl_mvm *mvm,
        memcpy(&cmd.indirection_table[i * nbytes], cmd.indirection_table,
               ARRAY_SIZE(cmd.indirection_table) % nbytes);
 
-       memcpy(cmd.secret_key, mvm->secret_key, sizeof(cmd.secret_key));
+       netdev_rss_key_fill(cmd.secret_key, sizeof(cmd.secret_key));
 
        mutex_lock(&mvm->mutex);
        ret = iwl_mvm_send_cmd_pdu(mvm, RSS_CONFIG_CMD, 0, sizeof(cmd), &cmd);

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index f375275..2dc97a1 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -64,6 +64,7 @@
  *
  *****************************************************************************/
 #include <net/mac80211.h>
+#include <linux/netdevice.h>
 
 #include "iwl-trans.h"
 #include "iwl-op-mode.h"
@@ -114,14 +115,18 @@ static int iwl_send_rss_cfg_cmd(struct iwl_mvm *mvm)
        struct iwl_rss_config_cmd cmd = {
                .flags = cpu_to_le32(IWL_RSS_ENABLE),
                .hash_mask = IWL_RSS_HASH_TYPE_IPV4_TCP |
+                            IWL_RSS_HASH_TYPE_IPV4_UDP |
                             IWL_RSS_HASH_TYPE_IPV4_PAYLOAD |
                             IWL_RSS_HASH_TYPE_IPV6_TCP |
+                            IWL_RSS_HASH_TYPE_IPV6_UDP |
                             IWL_RSS_HASH_TYPE_IPV6_PAYLOAD,
        };
 
+       /* Do not direct RSS traffic to Q 0 which is our fallback queue */
        for (i = 0; i < ARRAY_SIZE(cmd.indirection_table); i++)
-               cmd.indirection_table[i] = i % mvm->trans->num_rx_queues;
-       memcpy(cmd.secret_key, mvm->secret_key, sizeof(cmd.secret_key));
+               cmd.indirection_table[i] =
+                       1 + (i % (mvm->trans->num_rx_queues - 1));
+       netdev_rss_key_fill(cmd.secret_key, sizeof(cmd.secret_key));
 
        return iwl_mvm_send_cmd_pdu(mvm, RSS_CONFIG_CMD, 0, sizeof(cmd), &cmd);
 }

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index f0e2597..a9de2ad 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -699,7 +699,6 @@ struct iwl_mvm {
        atomic_t pending_frames[IWL_MVM_STATION_COUNT];
        u32 tfd_drained[IWL_MVM_STATION_COUNT];
        u8 rx_ba_sessions;
-       u32 secret_key[IWL_RSS_HASH_KEY_CNT];
 
        /* configured by mac80211 */
        u32 rts_threshold;

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 9fc705c..e36bcad 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -725,9 +725,6 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 
        iwl_mvm_tof_init(mvm);
 
-       /* init RSS hash key */
-       get_random_bytes(mvm->secret_key, sizeof(mvm->secret_key));
-
        return op_mode;
 
  out_unregister: