iwlwifi: pcie: support 2k rx buffers

The smallest rb size supported today is 4k rx buffers.
22560 devices use 2k rxb's, so allow using 2k buffers.

Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
index 650214f..38fcc6a 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
@@ -1787,7 +1787,8 @@ MODULE_PARM_DESC(11n_disable,
        "disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX");
 module_param_named(amsdu_size, iwlwifi_mod_params.amsdu_size, int, 0444);
 MODULE_PARM_DESC(amsdu_size,
-                "amsdu size 0: 12K for multi Rx queue devices, 4K for other devices 1:4K 2:8K 3:12K (default 0)");
+                "amsdu size 0: 12K for multi Rx queue devices, 2K for 22560 devices, "
+                "4K for other devices 1:4K 2:8K 3:12K 4: 2K (default 0)");
 module_param_named(fw_restart, iwlwifi_mod_params.fw_restart, bool, 0444);
 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error (default true)");
 

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c
index 777f5df..a4c9621 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c
@@ -7,6 +7,7 @@
  *
  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2018 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -18,9 +19,7 @@
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
- * USA
+ * along with this program;
  *
  * The full GNU General Public License is included in this distribution
  * in the file called COPYING.
@@ -33,6 +32,7 @@
  *
  * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2018 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -767,7 +767,7 @@ void iwl_init_ht_hw_capab(const struct iwl_cfg *cfg,
                ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
 
        if ((cfg->mq_rx_supported &&
-            iwlwifi_mod_params.amsdu_size != IWL_AMSDU_4K) ||
+            iwlwifi_mod_params.amsdu_size == IWL_AMSDU_DEF) ||
             iwlwifi_mod_params.amsdu_size >= IWL_AMSDU_8K)
                ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-modparams.h b/drivers/net/wireless/intel/iwlwifi/iwl-modparams.h
index 5dd848c..97072cf 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/iwl-modparams.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-modparams.h
@@ -6,6 +6,7 @@
  * GPL LICENSE SUMMARY
  *
  * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2018 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -17,9 +18,7 @@
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
- * USA
+ * along with this program;
  *
  * The full GNU General Public License is included in this distribution
  * in the file called COPYING.
@@ -31,6 +30,7 @@
  * BSD LICENSE
  *
  * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2018 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -90,6 +90,8 @@ enum iwl_amsdu_size {
        IWL_AMSDU_4K = 1,
        IWL_AMSDU_8K = 2,
        IWL_AMSDU_12K = 3,
+       /* Add 2K at the end to avoid breaking current API */
+       IWL_AMSDU_2K = 4,
 };
 
 enum iwl_uapsd_disable {

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
index 7bb0360..b4c3a95 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
@@ -430,6 +430,13 @@ static void iwl_init_vht_hw_capab(const struct iwl_cfg *cfg,
                else
                        vht_cap->cap |= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895;
                break;
+       case IWL_AMSDU_2K:
+               if (cfg->mq_rx_supported)
+                       vht_cap->cap |=
+                               IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454;
+               else
+                       WARN(1, "RB size of 2K is not supported by this device\n");
+               break;
        case IWL_AMSDU_4K:
                vht_cap->cap |= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895;
                break;

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
index 1b9c627..4229992 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
@@ -350,6 +350,8 @@ static inline int
 iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size)
 {
        switch (rb_size) {
+       case IWL_AMSDU_2K:
+               return get_order(2 * 1024);
        case IWL_AMSDU_4K:
                return get_order(4 * 1024);
        case IWL_AMSDU_8K:

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 5d9b930..d966262 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -704,7 +704,10 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
        }
 
        /* the hardware splits the A-MSDU */
-       if (mvm->cfg->mq_rx_supported)
+       if (mvm->trans->cfg->device_family >=
+           IWL_DEVICE_FAMILY_22560)
+               trans_cfg.rx_buf_size = IWL_AMSDU_2K;
+       else if (mvm->cfg->mq_rx_supported)
                trans_cfg.rx_buf_size = IWL_AMSDU_4K;
 
        trans->wide_cmd_header = true;

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
index 8cd0c3d..f509e55 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
@@ -858,6 +858,9 @@ static void iwl_pcie_rx_mq_hw_init(struct iwl_trans *trans)
        int i;
 
        switch (trans_pcie->rx_buf_size) {
+       case IWL_AMSDU_2K:
+               rb_size = RFH_RXF_DMA_RB_SIZE_2K;
+               break;
        case IWL_AMSDU_4K:
                rb_size = RFH_RXF_DMA_RB_SIZE_4K;
                break;