iwlwifi: mvm: fix EBS on single scan

EBS error detection isn't supported by all FWs, so turn it on
only if the FW advertises such support.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-file.h b/drivers/net/wireless/iwlwifi/iwl-fw-file.h
index 1bbe4fc..660ddb1 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-fw-file.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fw-file.h
@@ -246,6 +246,7 @@ enum iwl_ucode_tlv_flag {
  * @IWL_UCODE_TLV_API_BASIC_DWELL: use only basic dwell time in scan command,
  *     regardless of the band or the number of the probes. FW will calculate
  *     the actual dwell time.
+ * @IWL_UCODE_TLV_API_SINGLE_SCAN_EBS: EBS is supported for single scans too.
  */
 enum iwl_ucode_tlv_api {
        IWL_UCODE_TLV_API_WOWLAN_CONFIG_TID     = BIT(0),
@@ -257,6 +258,7 @@ enum iwl_ucode_tlv_api {
        IWL_UCODE_TLV_API_SF_NO_DUMMY_NOTIF     = BIT(7),
        IWL_UCODE_TLV_API_FRAGMENTED_SCAN       = BIT(8),
        IWL_UCODE_TLV_API_BASIC_DWELL           = BIT(13),
+       IWL_UCODE_TLV_API_SINGLE_SCAN_EBS       = BIT(16),
 };
 
 /**

diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h
index 201846d..cfc0e65 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h
@@ -653,8 +653,11 @@ enum iwl_scan_channel_flags {
 };
 
 /* iwl_scan_channel_opt - CHANNEL_OPTIMIZATION_API_S
- * @flags: enum iwl_scan_channel_flgs
- * @non_ebs_ratio: how many regular scan iteration before EBS
+ * @flags: enum iwl_scan_channel_flags
+ * @non_ebs_ratio: defines the ratio of number of scan iterations where EBS is
+ *     involved.
+ *     1 - EBS is disabled.
+ *     2 - every second scan will be full scan(and so on).
  */
 struct iwl_scan_channel_opt {
        __le16 flags;

diff --git a/drivers/net/wireless/iwlwifi/mvm/scan.c b/drivers/net/wireless/iwlwifi/mvm/scan.c
index ec9a8e7..3fbba4b 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/iwlwifi/mvm/scan.c
@@ -72,6 +72,8 @@
 
 #define IWL_PLCP_QUIET_THRESH 1
 #define IWL_ACTIVE_QUIET_TIME 10
+#define IWL_DENSE_EBS_SCAN_RATIO 5
+#define IWL_SPARSE_EBS_SCAN_RATIO 1
 
 struct iwl_mvm_scan_params {
        u32 max_out_time;
@@ -1297,18 +1299,6 @@ iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
        cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
        cmd->iter_num = cpu_to_le32(1);
 
-       if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
-           mvm->last_ebs_successful) {
-               cmd->channel_opt[0].flags =
-                       cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
-                                   IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
-                                   IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
-               cmd->channel_opt[1].flags =
-                       cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
-                                   IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
-                                   IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
-       }
-
        if (iwl_mvm_rrm_scan_needed(mvm))
                cmd->scan_flags |=
                        cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
@@ -1383,6 +1373,22 @@ int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
        cmd->schedule[1].iterations = 0;
        cmd->schedule[1].full_scan_mul = 0;
 
+       if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS &&
+           mvm->last_ebs_successful) {
+               cmd->channel_opt[0].flags =
+                       cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+                                   IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+                                   IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+               cmd->channel_opt[0].non_ebs_ratio =
+                       cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
+               cmd->channel_opt[1].flags =
+                       cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+                                   IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+                                   IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+               cmd->channel_opt[1].non_ebs_ratio =
+                       cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
+       }
+
        for (i = 1; i <= req->req.n_ssids; i++)
                ssid_bitmap |= BIT(i);
 
@@ -1483,6 +1489,22 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm,
        cmd->schedule[1].iterations = 0xff;
        cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
 
+       if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
+           mvm->last_ebs_successful) {
+               cmd->channel_opt[0].flags =
+                       cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+                                   IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+                                   IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+               cmd->channel_opt[0].non_ebs_ratio =
+                       cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
+               cmd->channel_opt[1].flags =
+                       cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+                                   IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+                                   IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+               cmd->channel_opt[1].non_ebs_ratio =
+                       cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
+       }
+
        iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
                                       ssid_bitmap, cmd);