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authorEmmanuel Grumbach <emmanuel.grumbach@intel.com>2015-10-18 09:31:24 +0300
committerEmmanuel Grumbach <emmanuel.grumbach@intel.com>2015-12-21 00:27:37 +0300
commit6eb5e529d7e3bf85b50ab0b5178df905dfc53b06 (patch)
tree23891c1b8c886b4f2c5302166ec3d34f5173111f /drivers/net/wireless/intel/iwlwifi/iwl-devtrace-data.h
parent3f73b8cad1d2923bf27caeaba705c4a64b287f1e (diff)
downloadlinux-6eb5e529d7e3bf85b50ab0b5178df905dfc53b06.tar.xz
iwlwifi: pcie: build an A-MSDU using TSO core
When the op_mode sends an skb whose payload is bigger than MSS, PCIe will create an A-MSDU out of it. PCIe assumes that the skb that is coming from the op_mode can fit in one A-MSDU. It is the op_mode's responsibility to make sure that this guarantee holds. Additional headers need to be built for the subframes. The TSO core code takes care of the IP / TCP headers and the driver takes care of the 802.11 subframe headers. These headers are stored on a per-cpu page that is re-used for all the packets handled on that same CPU. Each skb holds a reference to that page and releases the page when it is reclaimed. When the page gets full, it is released and a new one is allocated. Since any SKB that doesn't go through the fast-xmit path of mac80211 will be segmented, we can assume here that the packet is not WEP / TKIP and has a proper SNAP header. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/iwl-devtrace-data.h')
-rw-r--r--drivers/net/wireless/intel/iwlwifi/iwl-devtrace-data.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-devtrace-data.h b/drivers/net/wireless/intel/iwlwifi/iwl-devtrace-data.h
index bde023316b4a..d80312b46f16 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-devtrace-data.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-devtrace-data.h
@@ -1,6 +1,7 @@
/******************************************************************************
*
* Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2015 Intel Deutschland GmbH
*
* 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
@@ -51,6 +52,22 @@ TRACE_EVENT(iwlwifi_dev_tx_data,
TP_printk("[%s] TX frame data", __get_str(dev))
);
+TRACE_EVENT(iwlwifi_dev_tx_tso_chunk,
+ TP_PROTO(const struct device *dev,
+ u8 *data_src, size_t data_len),
+ TP_ARGS(dev, data_src, data_len),
+ TP_STRUCT__entry(
+ DEV_ENTRY
+
+ __dynamic_array(u8, data, data_len)
+ ),
+ TP_fast_assign(
+ DEV_ASSIGN;
+ memcpy(__get_dynamic_array(data), data_src, data_len);
+ ),
+ TP_printk("[%s] TX frame data", __get_str(dev))
+);
+
TRACE_EVENT(iwlwifi_dev_rx_data,
TP_PROTO(const struct device *dev,
const struct iwl_trans *trans,