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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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6eb5e529d7
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>
98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2015 Intel Deutschland GmbH
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* Intel Linux Wireless <linuxwifi@intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#if !defined(__IWLWIFI_DEVICE_TRACE_DATA) || defined(TRACE_HEADER_MULTI_READ)
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#define __IWLWIFI_DEVICE_TRACE_DATA
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#include <linux/tracepoint.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM iwlwifi_data
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TRACE_EVENT(iwlwifi_dev_tx_data,
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TP_PROTO(const struct device *dev,
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struct sk_buff *skb,
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u8 hdr_len, size_t data_len),
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TP_ARGS(dev, skb, hdr_len, data_len),
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TP_STRUCT__entry(
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DEV_ENTRY
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__dynamic_array(u8, data, iwl_trace_data(skb) ? data_len : 0)
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),
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TP_fast_assign(
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DEV_ASSIGN;
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if (iwl_trace_data(skb))
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skb_copy_bits(skb, hdr_len,
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__get_dynamic_array(data), data_len);
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),
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TP_printk("[%s] TX frame data", __get_str(dev))
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);
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TRACE_EVENT(iwlwifi_dev_tx_tso_chunk,
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TP_PROTO(const struct device *dev,
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u8 *data_src, size_t data_len),
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TP_ARGS(dev, data_src, data_len),
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TP_STRUCT__entry(
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DEV_ENTRY
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__dynamic_array(u8, data, data_len)
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),
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TP_fast_assign(
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DEV_ASSIGN;
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memcpy(__get_dynamic_array(data), data_src, data_len);
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),
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TP_printk("[%s] TX frame data", __get_str(dev))
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);
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TRACE_EVENT(iwlwifi_dev_rx_data,
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TP_PROTO(const struct device *dev,
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const struct iwl_trans *trans,
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void *rxbuf, size_t len),
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TP_ARGS(dev, trans, rxbuf, len),
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TP_STRUCT__entry(
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DEV_ENTRY
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__dynamic_array(u8, data,
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len - iwl_rx_trace_len(trans, rxbuf, len))
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),
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TP_fast_assign(
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size_t offs = iwl_rx_trace_len(trans, rxbuf, len);
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DEV_ASSIGN;
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if (offs < len)
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memcpy(__get_dynamic_array(data),
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((u8 *)rxbuf) + offs, len - offs);
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),
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TP_printk("[%s] RX frame data", __get_str(dev))
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);
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#endif /* __IWLWIFI_DEVICE_TRACE_DATA */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE iwl-devtrace-data
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#include <trace/define_trace.h>
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