ath10k: detect the number of spatial streams supported by hw

Until now ath10k assumed 3 spatial streams.
However some devices support only 2 spatial
streams.

This patch improves performance on devices that
don't support 3 spatial streams.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 9f21ecb..ff42bb7 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -285,6 +285,7 @@ struct ath10k {
        u32 hw_max_tx_power;
        u32 ht_cap_info;
        u32 vht_cap_info;
+       u32 num_rf_chains;
 
        struct targetdef *targetdef;
        struct hostdef *hostdef;

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 6e01ef6..344ad27 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3093,19 +3093,18 @@ static struct ieee80211_sta_vht_cap ath10k_create_vht_cap(struct ath10k *ar)
 {
        struct ieee80211_sta_vht_cap vht_cap = {0};
        u16 mcs_map;
+       int i;
 
        vht_cap.vht_supported = 1;
        vht_cap.cap = ar->vht_cap_info;
 
-       /* FIXME: check dynamically how many streams board supports */
-       mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
-               IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
-               IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
-               IEEE80211_VHT_MCS_NOT_SUPPORTED << 6 |
-               IEEE80211_VHT_MCS_NOT_SUPPORTED << 8 |
-               IEEE80211_VHT_MCS_NOT_SUPPORTED << 10 |
-               IEEE80211_VHT_MCS_NOT_SUPPORTED << 12 |
-               IEEE80211_VHT_MCS_NOT_SUPPORTED << 14;
+       mcs_map = 0;
+       for (i = 0; i < 8; i++) {
+               if (i < ar->num_rf_chains)
+                       mcs_map |= IEEE80211_VHT_MCS_SUPPORT_0_9 << (i*2);
+               else
+                       mcs_map |= IEEE80211_VHT_MCS_NOT_SUPPORTED << (i*2);
+       }
 
        vht_cap.vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map);
        vht_cap.vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map);
@@ -3168,7 +3167,7 @@ static struct ieee80211_sta_ht_cap ath10k_get_ht_cap(struct ath10k *ar)
        if (ar->vht_cap_info & WMI_VHT_CAP_MAX_MPDU_LEN_MASK)
                ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 
-       for (i = 0; i < WMI_MAX_SPATIAL_STREAM; i++)
+       for (i = 0; i < ar->num_rf_chains; i++)
                ht_cap.mcs.rx_mask[i] = 0xFF;
 
        ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;

diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index 5e42460..1cbcb2e 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -868,6 +868,13 @@ static void ath10k_wmi_service_ready_event_rx(struct ath10k *ar,
                (__le32_to_cpu(ev->sw_version_1) & 0xffff0000) >> 16;
        ar->fw_version_build = (__le32_to_cpu(ev->sw_version_1) & 0x0000ffff);
        ar->phy_capability = __le32_to_cpu(ev->phy_capability);
+       ar->num_rf_chains = __le32_to_cpu(ev->num_rf_chains);
+
+       if (ar->num_rf_chains > WMI_MAX_SPATIAL_STREAM) {
+               ath10k_warn("hardware advertises support for more spatial streams than it should (%d > %d)\n",
+                           ar->num_rf_chains, WMI_MAX_SPATIAL_STREAM);
+               ar->num_rf_chains = WMI_MAX_SPATIAL_STREAM;
+       }
 
        ar->ath_common.regulatory.current_rd =
                __le32_to_cpu(ev->hal_reg_capabilities.eeprom_rd);
@@ -892,7 +899,7 @@ static void ath10k_wmi_service_ready_event_rx(struct ath10k *ar,
        }
 
        ath10k_dbg(ATH10K_DBG_WMI,
-                  "wmi event service ready sw_ver 0x%08x sw_ver1 0x%08x abi_ver %u phy_cap 0x%08x ht_cap 0x%08x vht_cap 0x%08x vht_supp_msc 0x%08x sys_cap_info 0x%08x mem_reqs %u\n",
+                  "wmi event service ready sw_ver 0x%08x sw_ver1 0x%08x abi_ver %u phy_cap 0x%08x ht_cap 0x%08x vht_cap 0x%08x vht_supp_msc 0x%08x sys_cap_info 0x%08x mem_reqs %u num_rf_chains %u\n",
                   __le32_to_cpu(ev->sw_version),
                   __le32_to_cpu(ev->sw_version_1),
                   __le32_to_cpu(ev->abi_version),
@@ -901,7 +908,8 @@ static void ath10k_wmi_service_ready_event_rx(struct ath10k *ar,
                   __le32_to_cpu(ev->vht_cap_info),
                   __le32_to_cpu(ev->vht_supp_mcs),
                   __le32_to_cpu(ev->sys_cap_info),
-                  __le32_to_cpu(ev->num_mem_reqs));
+                  __le32_to_cpu(ev->num_mem_reqs),
+                  __le32_to_cpu(ev->num_rf_chains));
 
        complete(&ar->wmi.service_ready);
 }