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| author | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-10-18 09:31:24 +0300 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-12-20 23:27:37 +0200 |
| commit | 6eb5e529d7e3bf85b50ab0b5178df905dfc53b06 (patch) | |
| tree | 23891c1b8c886b4f2c5302166ec3d34f5173111f /drivers/net/wireless/intel/iwlwifi/iwl-devtrace-data.h | |
| parent | 3f73b8cad1d2923bf27caeaba705c4a64b287f1e (diff) | |
| download | linux-6eb5e529d7e3bf85b50ab0b5178df905dfc53b06.tar.bz2 | |
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.h | 17 |
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, |