Commit graph

484094 commits

Author SHA1 Message Date
Michal Kazior
d84a512dca ath10k: remove transfer_id from ath10k_hif_cb::tx_completion
Pass the eid argument via skbuff control buffer.
This will make it possible to work with queues of
HTC event buffers.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2014-12-01 09:13:36 +02:00
Michal Kazior
5f07ea4c3a ath10k: remove unused callback argument from struct ath10k_hif_cb::rx_completion
This wasn't used since forever and there are no
plans on using it.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2014-12-01 09:13:06 +02:00
Michal Kazior
acfe7ecfa4 ath10k: make wmi service bitmap non-debug
The service bitmap can be used to determine
firmware capabilities.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2014-12-01 09:09:28 +02:00
Michal Kazior
37b9f933e0 ath10k: add sanity checks for service bmap parsing
This shouldn't really happen but take into account
the original service bitmap length when mapping
service ids.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2014-12-01 09:09:21 +02:00
Michal Kazior
2a3e60d37f ath10k: fix wmi svc bitmap dbg print
The dump print uses sizeof() but since service_map
was a mere pointer the dump was too short.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2014-12-01 09:09:14 +02:00
Michal Kazior
b22a8f49d6 ath10k: add pointer constness to traces
Traces shouldn't modified passed data. This will
make it possible to pass const arguments to
traces.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2014-12-01 09:05:26 +02:00
Vivek Natarajan
acab6400da ath10k: do not limit RTS threshold value to 2347
Increase the rts threshold from the legacy value of 2347 to support higher
threshold limit.

Signed-off-by: Vivek Natarajan <nataraja@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2014-12-01 08:55:13 +02:00
Paul Gortmaker
cd4c910e00 netpoll: delete defconfig references to obsolete NETPOLL_TRAP
In commit 9c62a68d13 ("netpoll:
Remove dead packet receive code (CONFIG_NETPOLL_TRAP)") this
Kconfig option was removed.  So remove references to it from
all defconfigs as well.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-29 21:13:48 -08:00
Mahesh Bandewar
265de6d19c ipvlan: ipvlan depends on INET and IPV6
This driver uses ip_out_local() and ip6_route_output() which are
defined only if CONFIG_INET and CONFIG_IPV6 are enabled respectively.

Reported-by: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-29 20:53:05 -08:00
David S. Miller
60b7379dc5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-11-29 20:47:48 -08:00
Jason Wang
a523a5ecc8 macvlan: delay the header check for dodgy packets into lower device
We do header check twice for a dodgy packet. One is done before
macvlan_start_xmit(), another is done before lower device's
ndo_start_xmit(). The first one seems redundant so this patch tries to
delay header check until a packet reaches its lower device (or macvtap)
through always enabling NETIF_F_GSO_ROBUST for macvlan device.

Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-29 20:44:27 -08:00
Linus Torvalds
7a5a4f9787 Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
 "Three fixlets from the ARM SoC camp:
   - correct irqdomain initialization for atmel-aic
   - correct error handling for device tree parsing in bcm controllers"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip: brcmstb-l2: Fix error handling of irq_of_parse_and_map
  irqchip: bcm7120-l2: Fix error handling of irq_of_parse_and_map
  irqchip: atmel-aic: Fix irqdomain initialization
2014-11-29 10:49:24 -08:00
Linus Torvalds
ed02bfa4aa SCSI fixes on 20141128
This is a set of ten fixes: 8 for UFS including four static checker warnings,
 a potential null deref in the voltage regulator code, a race on module unload,
 a ref counting fix on the well known LUNs which made it impossible to remove
 the ufs module and fix to correct the information in pwr_info.  In addition to
 UFS, there's a blacklist for the Intel Multi-Flex array which chokes on report
 supported operation codes and a fix to an oops in bnx2fc caused by shared
 skbs.
 
 Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is a set of ten fixes: 8 for UFS including four static checker
  warnings, a potential null deref in the voltage regulator code, a race
  on module unload, a ref counting fix on the well known LUNs which made
  it impossible to remove the ufs module and fix to correct the
  information in pwr_info.

  In addition to UFS, there's a blacklist for the Intel Multi-Flex array
  which chokes on report supported operation codes and a fix to an oops
  in bnx2fc caused by shared skbs"

[ For us non-SCSI people: "UFS" here is "Universal Flash Storage" not
  the filesystem.  - Linus ]

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  ufs: fix NULL dereference when no regulators are defined
  ufs: ensure clk gating work is finished before module unloading
  scsi: ufs: fix static checker warning in ufshcd_parse_clock_info
  scsi: ufs: fix static checker warning in __ufshcd_setup_clocks
  scsi: ufs: fix static checker warning in ufshcd_populate_vreg
  scsi: ufs: fix static checker errors in ufshcd_system_suspend
  ufs: fix power info after link start-up
  ufs: fix reference counting of W-LUs
  scsi: add Intel Multi-Flex to scsi scan blacklist
  bnx2fc: do not add shared skbs to the fcoe_rx_list
2014-11-29 10:15:31 -08:00
Linus Torvalds
8891063871 Staging/IIO driver fixes for 3.18-rc7
Here are some Staging and IIO driver fixes for 3.18-rc7 that resolve a
 number of reported issues, and a new device id for a staging wireless
 driver.
 
 All of these have been in linux-next.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO driver fixes from Greg KH:
 "Here are some staging and IIO driver fixes for 3.18-rc7 that resolve a
  number of reported issues, and a new device id for a staging wireless
  driver.

  All of these have been in linux-next"

* tag 'staging-3.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: r8188eu: Add new device ID for DLink GO-USB-N150
  staging: r8188eu: Fix scheduling while atomic error introduced in commit fadbe0cd
  iio: accel: bmc150: set low default thresholds
  iio: accel: bmc150: Fix iio_event_spec direction
  iio: accel: bmc150: Send x, y and z motion separately
  iio: accel: bmc150: Error handling when mode set fails
  iio: gyro: bmg160: Fix iio_event_spec direction
  iio: gyro: bmg160: Send x, y and z motion separately
  iio: gyro: bmg160: Don't let interrupt mode to be open drain
  iio: gyro: bmg160: Error handling when mode set fails
  iio: adc: men_z188_adc: Add terminating entry for men_z188_ids
  iio: accel: kxcjk-1013: Fix kxcjk10013_set_range
  iio: Fix IIO_EVENT_CODE_EXTRACT_DIR bit mask
2014-11-28 16:08:09 -08:00
Linus Torvalds
6f93840d56 TTY/Serial fix for 3.18-rc7
Here is a single revert for the of-serial driver that resolves a
 reported issue.
 
 This revert has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fix from Greg KH:
 "Here is a single revert for the of-serial driver that resolves a
  reported issue.

  This revert has been in linux-next for a while"

* tag 'tty-3.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "serial: of-serial: add PM suspend/resume support"
2014-11-28 16:03:24 -08:00
Linus Torvalds
4742eb3dad USB fixes for 3.18-rc7
Here are some USB driver fixes and new device ids for 3.18-rc7.
 
 Full details are in the shortlog, and all of these have been in the
 linux-next tree for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some USB driver fixes and new device ids for 3.18-rc7.

  Full details are in the shortlog, and all of these have been in the
  linux-next tree for a while"

* tag 'usb-3.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb-quirks: Add reset-resume quirk for MS Wireless Laser Mouse 6000
  usb: xhci: rework root port wake bits if controller isn't allowed to wakeup
  USB: xhci: Reset a halted endpoint immediately when we encounter a stall.
  Revert "xhci: clear root port wake on bits if controller isn't wake-up capable"
  USB: xhci: don't start a halted endpoint before its new dequeue is set
  USB: uas: Add no-uas quirk for Hitachi usb-3 enclosures 4971:1012
  USB: ssu100: fix overrun-error reporting
  USB: keyspan: fix overrun-error reporting
  USB: keyspan: fix tty line-status reporting
  usb: serial: ftdi_sio: add PIDs for Matrix Orbital products
  usb: dwc3: ep0: fix for dead code
  USB: serial: cp210x: add IDs for CEL MeshConnect USB Stick
2014-11-28 15:55:14 -08:00
Linus Torvalds
cba3b00dea Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal
Pull thermal fixes from Eduardo Valentin:
 "In this -rc still very minor changes:

   - Lee Jones fixes compilation warning in sti thermal driver
   - Marjus Elfring removes unnecessary checks in exynos thermal driver
     (as per coccinelle)
   - Now we always update cpufreq policies, and thus get (hopefully)
     always in sync with cpufreq, thanks to Yadwinder"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
  thermal: Exynos: Deletion of unnecessary checks before two function calls
  thermal: sti: Ignore suspend/resume functions when !PM_SLEEP
  thermal: cpu_cooling: Update always cpufreq policy with thermal constraints
2014-11-28 14:00:33 -08:00
Linus Torvalds
16cf45c09c sound fixes for 3.18-rc7
No excitement, here are only minor fixes: an endian fix for the
 new DSD format we added in 3.18, a fix for HP mute LED, and a
 fix for Native Instrument quirk.
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Merge tag 'sound-3.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "No excitement, here are only minor fixes: an endian fix for the new
  DSD format we added in 3.18, a fix for HP mute LED, and a fix for
  Native Instrument quirk"

* tag 'sound-3.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: pcm: Add big-endian DSD sample formats and fix XMOS DSD sample format
  ALSA: hda - One more HP machine needs to change mute led quirk
  ALSA: usb-audio: Use snd_usb_ctl_msg() for Native Instruments quirk
2014-11-28 13:54:53 -08:00
Linus Torvalds
615b994e64 ARM: SoC fixes for 3.18-rc7
Just four simple fixes this week:
 
 - one missing of_node_put() on armv7 based mvebu
 - forcing the USB host into the right mode on Chromebook (exynos5-snow)
 - enabling two important drivers for exynos_defconfig
 - fixing a noncritical bug for tegra that would cause a
   regression with common code patches queued for 3.19
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Merge tag 'armsoc-for-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "Not much interesting going on fixes-wise for us this week, as it
  should be for an -rc7.  I'm not expecting Olof to work much over
  Thanksgiving weekend, so I decided to take over again and push these
  out to you.

  Just four simple fixes this week:

   - one missing of_node_put() on armv7 based mvebu
   - forcing the USB host into the right mode on Chromebook
     (exynos5-snow)
   - enabling two important drivers for exynos_defconfig
   - fixing a noncritical bug for tegra that would cause a regression
     with common code patches queued for 3.19"

* tag 'armsoc-for-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: tegra: irq: fix buggy usage of irq_data irq field
  ARM: exynos_defconfig: Enable max77802 rtc and clock drivers
  ARM: dts: Explicitly set dr_mode on exynos5250-snow
  ARM: mvebu: add missing of_node_put() call in coherency.c
2014-11-28 13:34:32 -08:00
Linus Torvalds
e818d5ed2a Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
 "Another round of relatively small ARM fixes.

  Thomas spotted that the strex backoff delay bit was a disable bit, so
  it needed to be clear for this to work.  Vladimir spotted that using a
  restart block for the cache flush operation would return -EINTR, which
  userspace was not expecting.  Dmitry spotted that the auxiliary
  control register accesses for Xscale were not correct"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8226/1: cacheflush: get rid of restarting block
  ARM: 8222/1: mvebu: enable strex backoff delay
  ARM: 8216/1: xscale: correct auxiliary register in suspend/resume
2014-11-28 13:32:47 -08:00
Steven Noonan
4338c57259 netfilter: nf_log_ipv6: correct typo in module description
It incorrectly identifies itself as "IPv4" packet logging.

Signed-off-by: Steven Noonan <steven@uplinklabs.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-11-28 17:28:17 +01:00
Felix Fietkau
f027c2aca0 mac80211: add ieee80211_tx_status_noskb
This can be used by drivers that cannot reliably map tx status
information onto specific skbs.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:51 +01:00
Felix Fietkau
7e1cdcbb09 mac0211: add a helper function for fixing up tx status rates
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:50 +01:00
Felix Fietkau
ad9dda6383 mac80211: pass tx info to ieee80211_lost_packet instead of an skb
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:50 +01:00
Felix Fietkau
63558a650a mac80211: minstrel_ht: switch to .tx_status_noskb
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:50 +01:00
Felix Fietkau
fb7acfb8e1 mac80211: minstrel: switch to .tx_status_noskb
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:50 +01:00
Felix Fietkau
f684565e0a mac80211: add tx_status_noskb to rate_control_ops
This op works like .tx_status, except it does not need access to the
skb. This will be used by drivers that cannot match tx status
information to specific packets.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:50 +01:00
Felix Fietkau
95943425c0 mac80211: minstrel_ht: move aggregation check to .get_rate()
Preparation for adding a no-skb tx status path

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:50 +01:00
Johannes Berg
ea372c5452 cfg80211: remove unneeded initialisations in nl80211_set_reg
Some variables are assigned unconditionally, remove their
initialisations to help avoid introducing errors later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 14:54:31 +01:00
Arik Nemtsov
ad932f046f cfg80211: leave invalid channels on regdomain change
When the regulatory settings change, some channels might become invalid.
Disconnect interfaces acting on these channels, after giving userspace
code a grace period to leave them.

This mode is currently opt-in, and not all interface operating modes are
supported for regulatory-enforcement checks. A wiphy that wishes to use
the new enforcement code must specify an appropriate regulatory flag,
and all its supported interface modes must be supported by the checking
code.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Luis R. Rodriguez <mcgrof@suse.com>
[fix some indentation, typos]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 14:33:41 +01:00
Felix Fietkau
336004e291 mac80211: add more missing checks for VHT tx rates
Fixes a crash on attempting to calculate the frame duration for a VHT
packet (which needs to be handled by hw/driver instead).

Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 14:24:23 +01:00
Julien Lefrique
d7979e130e NFC: NCI: Signal deactivation in Target mode
Before signaling the deactivation, send a deactivation request if in
RFST_DISCOVERY state because neard assumes polling is stopped and will
try to restart it.

Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Julien Lefrique
6ff5462b67 NFC: NCI: Handle Discovery deactivation type
When the deactivation type reported by RF_DEACTIVATE_NTF is Discovery, go in
RFST_DISCOVERY state. The NFCC stays in Poll mode and/or Listen mode.

Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Julien Lefrique
966efbfb0d NFC: Fix a memory leak
Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Julien Lefrique
122c195872 NFC: NCI: Forward data received in Target mode to nfc core
Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Julien Lefrique
485f442fd5 NFC: NCI: Implement Target mode send function
As specified in NCI 1.0 and NCI 1.1, when using the NFC-DEP RF Interface, the
DH and the NFCC shall only use the Static RF Connection for data communication
with a Remote NFC Endpoint.

Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Julien Lefrique
529ee06682 NFC: NCI: Configure ATR_RES general bytes
The Target responds to the ATR_REQ with the ATR_RES. Configure the General
Bytes in ATR_RES with the first three octets equal to the NFC Forum LLCP
magic number, followed by some LLC Parameters TLVs described in section
4.5 of [LLCP].

Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Julien Lefrique
a99903ec45 NFC: NCI: Handle Target mode activation
Changes:

 * Extract the Listen mode activation parameters from RF_INTF_ACTIVATED_NTF.

 * Store the General Bytes of ATR_REQ.

 * Signal that Target mode is activated in case of an activation in NFC-DEP.

 * Update the NCI state accordingly.

 * Use the various constants defined in nfc.h.

 * Fix the ATR_REQ and ATR_RES maximum size. As per NCI 1.0 and NCI 1.1, the
   Activation Parameters for both Poll and Listen mode contain all the bytes of
   ATR_REQ/ATR_RES starting and including Byte 3 as defined in [DIGITAL].
   In [DIGITAL], the maximum size of ATR_REQ/ATR_RES is 64 bytes and they are
   numbered starting from Byte 1.

Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Julien Lefrique
90d78c1396 NFC: NCI: Enable NFC-DEP in Listen A and Listen F
Send LA_SEL_INFO and LF_PROTOCOL_TYPE with NFC-DEP protocol enabled.
Configure 212 Kbit/s and 412 Kbit/s bit rates for Listen F.

Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Julien Lefrique
772dccf4a7 NFC: NCI: Add passive Listen modes in discover request
The Target mode protocols are given to the nci_start_poll() function
but were previously ignored.
To enable P2P Target, when NFC-DEP is requested as a Target mode protocol, add
NFC-A and NFC-F Passive Listen modes in RF_DISCOVER_CMD command.

Signed-off-by: Julien Lefrique <lefrique@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 14:07:51 +01:00
Axel Lin
413df10bbf NFC: llcp: Use list_for_each_entry in llcp_accept_poll
list_for_each_entry_safe() is necessary if list objects are deleted from
the list while traversing it. Not the case here, so we can use the base
list_for_each_entry variant.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 13:41:44 +01:00
Johannes Berg
db083bcbca NFC: Don't include linux/unaligned/access_ok.h
This is a specific implementation, <asm/unaligned.h> is the
multiplexer that has the arch-specific knowledge of which
of the implementations needs to be used, so include that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:55:29 +01:00
Mark A. Greer
9b5ec0fd58 NFC: digital: Add NFC-DEP Target-side ATN Support
When an NFC-DEP target receives an ATN PDU, its
supposed to respond with a similar ATN PDU.
When the Target receives an I PDU with the PNI
one less than the current PNI and the last PDU
sent was an ATN PDU, the Target is to resend the
last non-ATN PDU that it has sent.  This is
described in section 14.12.3.4 of the NFC Digital
Protocol Spec.

The digital layer's NFC-DEP code doesn't implement
this so add that support.

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:40:38 +01:00
Mark A. Greer
384ab1d174 NFC: digital: Add NFC-DEP Initiator-side ATN Support
When an NFC-DEP Initiator times out when waiting for
a DEP_RES from the Target, its supposed to send an
ATN to the Target.  The Target should respond to the
ATN with a similar ATN PDU and the Initiator can then
resend the last non-ATN PDU that it sent.  No more
than 'N(retry,atn)' are to be send where
2 <= 'N(retry,atn)' <= 5.  If the Initiator had just
sent a NACK PDU when the timeout occurred, it is to
continue sending NACKs until 'N(retry,nack)' NACKs
have been send.  This is described in section
14.12.5.6 of the NFC-DEP Digital Protocol Spec.

The digital layer's NFC-DEP code doesn't implement
this so add that support.

The value chosen for 'N(retry,atn)' is 2.

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:39:55 +01:00
Mark A. Greer
49dbb14e30 NFC: digital: Add NFC-DEP Target-side NACK Support
When an NFC-DEP Target receives a NACK PDU with
a PNI equal to 1 less than the current PNI, it
is supposed to re-send the last PDU.  This is
implied in section 14.12.5.4 of the NFC Digital
Protocol Spec.

The digital layer's NFC-DEP code doesn't implement
Target-side NACK handing so add it.  The last PDU
that was sent is saved in the 'nfc_digital_dev'
structure's 'saved_skb' member.  The skb will have
an additional reference taken to ensure that the skb
isn't freed when the driver performs a kfree_skb()
on the skb.  The length of the skb/PDU is also saved
so the length can be restored when re-sending the PDU
in the skb (the driver will perform an skb_pull() so
an skb_push() needs to be done to restore the skb's
data pointer/length).

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:39:47 +01:00
Mark A. Greer
a80509c76b NFC: digital: Add NFC-DEP Initiator-side NACK Support
When an NFC-DEP Initiator receives a frame with
an incorrect CRC or with a parity error, and the
frame is at least 4 bytes long, its supposed to
send a NACK to the Target.  The Initiator can
send up to 'N(retry,nack)' consecutive NACKs
where 2 <= 'N(retry,nack)' <= 5.  When the limit
is exceeded, a PROTOCOL EXCEPTION is raised.
Any other type of transmission error is to be
ignored and the Initiator should continue
waiting for a new frame.  This is described
in section 14.12.5.4 of the NFC Digital Protocol
Spec.

The digital layer's NFC-DEP code doesn't implement
any of this so add it.  This support diverges from
the spec in two significant ways:

a) NACKs will be sent for ANY error reported by the
   driver except a timeout.  This is done because
   there is currently no way for the digital layer
   to distinguish a CRC or parity error from any
   other type of error reported by the driver.

b) All other errors will cause a PROTOCOL EXCEPTION
   even frames with CRC errors that are less than 4
   bytes.

The value chosen for 'N(retry,nack)' is 2.

Targets do not send NACK PDUs.

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:39:33 +01:00
Mark A. Greer
c12715ab3f NFC: digital: Add NFC-DEP Receive Chaining Support
When the peer in an NFC-DEP exchange has a
packet to send that is larger than the local
maximum payload, it sets the 'MI' bit in the
'I' PDU.  This indicates that NFC-DEP chaining
is to occur.

When such a PDU is received, the local side
responds with an 'ACK' PDU and this continues
until the peer sends an 'I' PDU with the 'MI'
bit cleared.  This indicates that the chaining
sequence is complete and the entire packet has
been transferred.

Receiving chained PDUs is currently not supported
by the digital layer so add that support.  When a
chaining sequence is initiated by the peer, the
digital layer will allocate an skb large enough
to hold 8 maximum sized frame payloads.  The maximum
payload can range from 64 to 254 bytes so 8 * 254 =
2032 seems like a reasonable compromise between
potentially wasting memory and constantly reallocating
new, larger skbs.

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:39:21 +01:00
Mark A. Greer
3bd2a5bcc6 NFC: digital: Add NFC-DEP Send Chaining Support
When the NFC-DEP code is given a packet to send
that is larger than the peer's maximum payload,
its supposed to set the 'MI' bit in the 'I' PDU's
Protocol Frame Byte (PFB).  Setting this bit
indicates that NFC-DEP chaining is to occur.

When NFC-DEP chaining is progress, sender 'I' PDUs
are acknowledged with 'ACK' PDUs until the last 'I'
PDU in the chain (which has the 'MI' bit cleared)
is responded to with a normal 'I' PDU.  This can
occur while in Initiator mode or in Target mode.

Sender NFC-DEP chaining is currently not implemented
in the digital layer so add that support.  Unfortunately,
since sending a frame may require writing the CRC to the
end of the data, the relevant data part of the original
skb must be copied for each intermediate frame.

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:39:10 +01:00
Mark A. Greer
b08147cbc4 NFC: digital: Implement NFC-DEP max payload lengths
The maximum payload for NFC-DEP exchanges (i.e., the
number of bytes between SoD and EoD) is negotiated
using the ATR_REQ, ATR_RES, and PSL_REQ commands.
The valid maximum lengths are 64, 128, 192, and 254
bytes.

Currently, NFC-DEP code assumes that both sides are
always using 254 byte maximums and ignores attempts
by the peer to change it.  Instead, implement the
negotiation code, enforce the local maximum when
receiving data from the peer, and don't send payloads
that exceed the remote's maximum.  The default local
maximum is 254 bytes.

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:38:59 +01:00
Mark A. Greer
485fdc9bb6 NFC: digital: Enforce NFC-DEP PNI sequencing
NFC-DEP DEP_REQ and DEP_RES exchanges using 'I'
and 'ACK/NACK' PDUs have a sequence number called
the Packet Number Information (PNI).  The PNI
is incremented (modulo 4) after every DEP_REQ/
DEP_RES pair and should be verified by the digital
layer code.  That verification isn't always done,
though, so add code to make sure that it is done.

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-11-28 12:38:47 +01:00