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2014-11-19stmmac: document common header fileGiuseppe CAVALLARO
This patch adds some useful comments inside the common header file to provide information about the APIs exposed by the driver. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-19stmmac: update driver documentationGiuseppe CAVALLARO
Recently many changes have been done inside the driver so this patch updates the driver's doc for example reviewing information for the rx and tx processes that are managed by napi method, adding new information for missing glue-logic files etc. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-19tcp: make connect() mem charging friendlyEric Dumazet
While working on sk_forward_alloc problems reported by Denys Fedoryshchenko, we found that tcp connect() (and fastopen) do not call sk_wmem_schedule() for SYN packet (and/or SYN/DATA packet), so sk_forward_alloc is negative while connect is in progress. We can fix this by calling regular sk_stream_alloc_skb() both for the SYN packet (in tcp_connect()) and the syn_data packet in tcp_send_syn_data() Then, tcp_send_syn_data() can avoid copying syn_data as we simply can manipulate syn_data->cb[] to remove SYN flag (and increment seq) Instead of open coding memcpy_fromiovecend(), simply use this helper. This leaves in socket write queue clean fast clone skbs. This was tested against our fastopen packetdrill tests. Reported-by: Denys Fedoryshchenko <nuclearcat@nuclearcat.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-19tun: return NET_XMIT_DROP for dropped packetsJason Wang
After commit 5d097109257c03a71845729f8db6b5770c4bbedc ("tun: only queue packets on device"), NETDEV_TX_OK was returned for dropped packets. This will confuse pktgen since dropped packets were counted as sent ones. Fixing this by returning NET_XMIT_DROP to let pktgen count it as error packet. Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-19mac80211: minstrel_ht: add a small optimization to minstrel_aggr_checkFelix Fietkau
Check the queue mapping earlier, skb->queue_mapping is more likely than skb->data to still be in d-cache. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: notify drivers on sta rate table changesJohannes Berg
This allows drivers with a firmware or chip-based rate lookup table to use the most recent default rate selection without having to get it from per-packet data or explicit ieee80211_get_tx_rate calls Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19nl80211: Broadcast CMD_NEW_INTERFACE and CMD_DEL_INTERFACETomasz Bursztyka
Let the other listeners being notified when a new or del interface command has been issued, thus reducing later necessary request to be in sync with current context. Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211-hwsim: Add HWSIM_CMD_GET_RADIO commandPatrik Flykt
HWSIM_CMD_GET_RADIO returns information about a specific radio id or all of them in response to a dump. Create the netlink skb or use the one provided by the dump functionality. Use the existing attribute appending function to fill in the same attributes when creating a new hwsim radio. Save alpha2 and struct ieee80211_regdomain in the hwsim data or else they will be lost in the depths of regulatory infrastructure. Signed-off-by: Patrik Flykt <patrik.flykt@linux.intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211-hwsim: Factor out netlink attribute appendingPatrik Flykt
Factor out netlink message attribute appending in order to reuse it with later code. As a result move netlink skb allocation to the calling function. Signed-off-by: Patrik Flykt <patrik.flykt@linux.intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19nl80211: Replace interface socket owner attribute with more generic oneJukka Rissanen
Replace NL80211_ATTR_IFACE_SOCKET_OWNER attribute with more generic NL80211_ATTR_SOCKET_OWNER that can be used with other commands that interface creation. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211-hwsim: remove unnecessary hwname checkJohannes Berg
The hwname will always be set if idx is negative (as it's a u32 read into an s64 it can't overflow either) so we can remove the unnecessary check for hwname being non-NULL. This was reported by smatch. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211-hwsim: hwname is always known so use the value from wiphyJukka Rissanen
We can always know the hwname of the radio so use the value from wiphy. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19cfg80211: protect fools returning NULL in add_virtual_intfRafał Miłecki
Callback add_virtual_intf is supposed to return ERR_PTR and trying to return NULL results in some "Unable to handle kernel paging request", etc. As it may be complicated to debug & trace, let's catch it (WARN). Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19cfg80211: explicitly initialize some fields in custom reg pathArik Nemtsov
Explicitly initialize the DFS state and beacon found state when handling channels in the custom regulatory path. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Acked-by: Luis R. Rodriguez <mcgrof@suse.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19cfg80211: update missing fields in custom regulatory pathArik Nemtsov
Some channels fields were not being updated in the custom regulatory path. Update them according to the code in handle_channel(). Signed-off-by: Jonathan Doron <jonathanx.doron@intel.com> Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Acked-by: Luis R. Rodriguez <mcgrof@suse.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: skip legacy rate mask handling for VHT ratesFelix Fietkau
The rate mask code currently assumes that a rate is legacy if IEEE80211_TX_RC_MCS is not set. This might be the cause of bogus VHT rates being reported with minstrel_ht. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: don't allow 40MHz tx rates in case of 20MHz chandefEliad Peller
When 20MHz chandef is used, 40MHz rates shouldn't be used (by the rate-control algorithm), even if the sta ht capabilities indicate support for it. Signed-off-by: Eliad Peller <eliadx.peller@intel.com> Singed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211_hwsim: support scanning with random MAC addressJohannes Berg
This adds support for scanning with random MAC address for both software and hardware scan. Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: allow drivers to support NL80211_SCAN_FLAG_RANDOM_ADDRJohannes Berg
Allow drivers to support NL80211_SCAN_FLAG_RANDOM_ADDR with software based scanning and generate a random MAC address for them for every scan request with the flag. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: rcu-ify scan and scheduled scan request pointersJohannes Berg
In order to use the scan and scheduled scan request pointers during RX to check for randomisation, make them accessible using RCU. Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19cfg80211: allow drivers to support random MAC addresses for scanJohannes Berg
Add the necessary feature flags and a scan flag to support using random MAC addresses for scan while unassociated. The configuration for this supports an arbitrary MAC address value and mask, so that any kind of configuration (e.g. fixed OUI or full 46-bit random) can be requested. Full 46-bit random is the default when no other configuration is passed. Also add a small helper function to use the addr/mask correctly. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: remove redundant checkEliad Peller
local->scan_req was tested in the previous line, so it can't be NULL. Signed-off-by: Eliad Peller <eliadx.peller@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19cfg80211: add wowlan net-detect supportLuciano Coelho
Add a new WoWLAN API to enable net-detect as a wake up trigger. Net-detect allows the device to scan in the background while the host is asleep to wake up the host system when a matching network is found. Reuse the scheduled scan attributes to specify how the scan is performed while suspended and the matches that will trigger a wake event. Signed-off-by: Luciano Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19cfg80211: refactor nl80211_start_sched_scan so it can be reusedLuciano Coelho
For net detect, we will need to reuse most of the scheduled scan parsing function, but not all, so split out the attributes parsing part out of the main start sched_scan function. Signed-off-by: Luciano Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: synchronously reserve TID per stationLiad Kaufman
In TDLS (e.g., TDLS off-channel) there is a requirement for some drivers to supply an unused TID between the AP and the device to the FW, to allow sending PTI requests and to allow the FW to aggregate on a specific TID for better throughput. To ensure that the allocated TID is indeed unused, this patch introduces an API for blocking the driver from TXing on that TID. Signed-off-by: Liad Kaufman <liad.kaufman@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: add specific-queue flushing supportLiad Kaufman
If the HW supports IEEE80211_HW_QUEUE_CONTROL, allow flushing only specific queues rather than all of them. Signed-off-by: Liad Kaufman <liad.kaufman@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: add TDLS channel-switch Rx flowArik Nemtsov
When receiving a TDLS channel switch request or response, parse the frame and call a new tdls_recv_channel_switch op in the low level driver with the parsed data. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: introduce TDLS channel switch opsArik Nemtsov
Implement the cfg80211 TDLS channel switch ops and introduce new mac80211 ones for low-level drivers. Verify low-level driver support for the new ops when using the relevant wiphy feature bit. Also verify the peer supports channel switching before passing the command down. Add a new STA flag to track the off-channel state with the TDLS peer and make sure to cancel the channel-switch if the peer STA is unexpectedly removed. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: add parsing of TDLS specific IEsArik Nemtsov
These are used in TDLS channel switching code. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19cfg80211: introduce TDLS channel switch commandsArik Nemtsov
Introduce commands to initiate and cancel TDLS channel-switching. Once TDLS channel-switching is started, the lower level driver is responsible for continually initiating channel-switch operations and returning to the base (AP) channel to listen for beacons from time to time. Upon cancellation of the channel-switch all communication between the relevant TDLS peers will continue on the base channel. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: prepare TDLS mgmt code for channel-switch templatesArik Nemtsov
Split the data-generating from the Tx-sending functionality, as we do not want to send templates to the lower driver. Also add an optional chandef argument to the data-generating portion. It will be used for channel-switch templates. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: track AP and peer STA TDLS chan-switch supportArik Nemtsov
The AP or peer can prohibit TDLS channel switch via a bit in the extended capabilities IE. Parse the IE and track this bit. Set an appropriate STA flag if both the AP and peer STA support TDLS channel-switching. Add the new STA flag and the missing TDLS_INITIATOR to debugfs. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19cfg/mac80211: define TDLS channel switch feature bitArik Nemtsov
Define some related TDLS protocol constants and advertise channel switch support in the extended-capabilities IE when the feature bit is defined. Actually supporting TDLS channel-switching also requires support for some new nl80211 commands, to be introduced by future patches. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: add BSS coex IE to TDLS setup framesArik Nemtsov
Add the BSS coex IE in case we support HT40 channels, as mandated by section 8.5.13 in IEEE802.11 2012. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: add supported channels IE during TDLS setupArik Nemtsov
This information element is mandatory in case TDLS channel-switching is to be supported. The channels given are ones supported and allowed to be active in the current regulatory setting. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: add function to create data frame template including keyJohannes Berg
For some TDLS channel switch implementations data frames need to be sent by the firmware based on a template. This template should be created by mac80211, and thus needs to properly be built from an 802.3 frame into an 802.11 frame. In addition, the device will need the key information so the select_key handler needs to be run. However, the driver/device will be responsible for all of the crypto encapsulation, as the sequence numbers etc. cannot be built by the host anyway in this case since it's a template to be used multiple times. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: factor out 802.11 header building codeJohannes Berg
Factor out the 802.11 header building code from the xmit function to be able to use it separately in a later commit. While at it, fix up some documentation. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: move skb info band assignment outJohannes Berg
Instead of passing the band as a parameter to ieee80211_xmit() and ieee80211_tx(), move it outside of the two functions while making sure info->band is set up before calling them. This removes the parameter and simplifies the follow commit. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: retransmit TDLS teardown packet through AP if not ACKedLiad Kaufman
Since the TDLS peer station might not receive the teardown packet (e.g., when in PS), this makes sure the packet is retransmitted - this time through the AP - if the TDLS peer didn't ACK the packet. Signed-off-by: Liad Kaufman <liad.kaufman@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: add option for setting skb flags before xmitLiad Kaufman
Allows setting of an skb's flags - if needed - when calling ieee80211_subif_start_xmit(). Signed-off-by: Liad Kaufman <liad.kaufman@intel.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19of/selftest: Fix off-by-one error in removal pathGrant Likely
The removal path for selftest data has an off by one error that causes the code to dereference beyond the end of the nodes[] array on the first pass through. The old code only worked by chance on a lot of platforms, but the bug was recently exposed on aarch64. The fix is simple. Decrement the node count before dereferencing, not after. Reported-by: Kevin Hilman <khilman@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: <stable@vger.kernel.org> # v3.17+
2014-11-19MIPS: jump_label.c: Handle the microMIPS J instruction encodingMaciej W. Rozycki
Implement the microMIPS encoding of the J instruction for the purpose of the static keys feature, fixing a crash early on in bootstrap as the kernel is unhappy seeing the ISA bit set in jump table entries. Make sure the ISA bit correctly reflects the instruction encoding chosen for the kernel, 0 for the standard MIPS and 1 for the microMIPS encoding. Also make sure the instruction to patch is a 32-bit NOP in the microMIPS mode as by default the 16-bit short encoding is assumed Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8516/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-19MIPS: jump_label.c: Correct the span of the J instructionMaciej W. Rozycki
Correct the check for the span of the 256MB segment addressable by the J instruction according to this instruction's semantics. The calculation of the jump target is applied to the address of the delay-slot instruction that immediately follows. Adjust the check accordingly by adding 4 to `e->code' that holds the address of the J instruction itself. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8515/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-19MIPS: Zero variable read by get_user / __get_user in case of an error.Ralf Baechle
This wasn't happening in all cases. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-19MIPS: lib: memcpy: Restore NOP on delay slot before returning to callerMarkos Chandras
Commit cf62a8b8134dd3 ("MIPS: lib: memcpy: Use macro to build the copy_user code") switched to a macro in order to build the memcpy symbols in preparation for the EVA support. However, this commit also removed the NOP instruction after the 'jr ra' when returning back to the caller. This had no visible side-effects since the next instruction was a load to the t0 register which was already in the clobbered list, but it may have undesired effects in the future if some other code is introduced in between the .Ldone and the .Ll_exc_copy labels. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: <stable@vger.kernel.org> # v3.15+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8512/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-19MIPS: tlb-r4k: Add missing HTW stop/start sequencesMarkos Chandras
HTW needs to stop and start again whenever the EntryHI register changes otherwise an inflight HTW operation might use the new EntryHI register for updating an old entry and that could lead to crashes or even a machine check exception. We fix this by ensuring the HTW has stop whenever the EntryHI register is about to change Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: <stable@vger.kernel.org> # v3.17+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8511/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-19MIPS: asm: uaccess: Add v1 register to clobber list on EVAMarkos Chandras
When EVA is turned on and prefetching is being used in memcpy.S, the v1 register is being used as a helper register to the PREFE instruction. However, v1 ($3) was not in the clobber list, which means that the compiler did not preserve it across function calls, and that could corrupt the value of the register leading to all sorts of userland crashes. We fix this problem by using the DADDI_SCRATCH macro to define the clobbered register when CONFIG_EVA && CONFIG_CPU_HAS_PREFETCH are enabled. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: <stable@vger.kernel.org> # v3.15+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8510/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-19MIPS: oprofile: Fix backtrace on 64-bit kernelAaro Koskinen
Fix incorrect cast that always results in wrong address for the new frame on 64-bit kernels. Signed-off-by: Aaro Koskinen <aaro.koskinen@nsn.com> Cc: stable@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8110/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-19MIPS: Loongson: Set Loongson-3's ISA level to MIPS64R1Huacai Chen
In CPU manual Loongson-3 is MIPS64R2 compatible, but during tests we found that its EI/DI instructions have problems. So we just set the ISA level to MIPS64R1. Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/8320/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-19MIPS: Loongson: Fix the write-combine CCA value settingHuacai Chen
All Loongson-2/3 processors support _CACHE_UNCACHED_ACCELERATED, not only Loongson-3A. Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/8319/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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