xen: Add __attribute__((format(printf... where appropriate

Use the compiler to verify printf formats and arguments.

Fix fallout.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
xen: Populate xenbus device attributes

The xenbus bus type uses device_create_file to assign all used device
attributes. However it does not remove them when the device goes away.

This patch uses the dev_attrs field of the bus type to specify default
attributes for all devices.

Signed-off-by: Bastian Blank <waldi@debian.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
xen: Add module alias to autoload backend drivers

All the Xen backend drivers are assigned to a special bus type
xen-backend. This patch exports xen-backend:* names through modalias and
uevent to autoload them.

Signed-off-by: Bastian Blank <waldi@debian.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
wl12xx: fix Tx security sequence number handling

Do not reset the security sequence number when issuing a join command or
interface is removed. Instead, reset the counter only during the unjoin
command.

Added the notion of counter wrap-around to the LSB number in
wl1271_tx_complete_packet.

Added post recovery padding to adjust for potential security number
progress during the recovery process by the firmware and avoid
potential interop issues in encrypted networks.

Signed-off-by: Oz Krakowski <ozk@ti.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: AP mode - support FW TX inactivity triggers

In AP mode we register for the MAX_TX_RETRY and INACTIVE_STA events.
Both are reported to the upper layers as a TX failure in the offending
stations.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: use 802.11 header location after relocation to frame start

When operating with TKIP encryption, the function wl1271_tx_fill_hdr()
relocates the 802.11 header to the start of the frame, and leaves room
for the security header.

Some functions in the Tx path rely on the location of the header,
namely, for purposes of roaming in STA mode and connecting new stations
in AP mode. Call these functions only after the header is relocated.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: schedule TX packets according to FW occupancy

When selecting packets for transmission, prefer the ACs that are least
occupied in the FW. When packets for multiple ACs are present in the FW,
it decides which to transmit according to WMM QoS parameters.

With these changes, lower priority ACs should not be starved when higher
priority traffic is present.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: Increase low & high TX watermarks

The current TX watermark settings cause the driver to stop queues too
frequently. Among other things, this can have a negative impact on WMM
prioritization, since mac80211 sorts pending packets by their ACs.

Fix this by increasing the high watermark to 256 packets. Increase the
low watermark to 32 to minimize periods with queues being stopped.

Signed-off-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: implement Tx watermarks per AC

Each AC is stopped when its queue is filled up to the high watermark,
and restarted when its queue it lower than the low watermark. This
ensures congested ACs are not able to starve other ACs.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: one SDIO initialization is enough

Skip manual device power on in case runtime PM is enabled for
our device.

This eliminates a secondary & redundant SDIO init sequence.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: configure suspend/resume only if associated/started

Configure the device (to wowlan) only if the sta/ap
is associated/started.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: add stop_scan command

define wl1271_scan_stop() to cancel an ongoing hw scan.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: implement cancel_hw_scan() callback

After implementing cancel_hw_scan(), there is no more need to
flush scan_complete_work on suspend.

scan_complete_work enqueues a new scan_work, that might lead
to the following warning (if the device was already suspended):

WARNING: at drivers/mmc/core/core.c:169 mmc_wait_for_req+0x1ac/0x2c8()
Backtrace:
[<c004b50c>] (dump_backtrace+0x0/0x110)
[<c04fda50>] (dump_stack+0x0/0x1c)
[<c008f700>] (warn_slowpath_common+0x0/0x6c)
[<c008f76c>] (warn_slowpath_null+0x0/0x2c)
[<c034b058>] (mmc_wait_for_req+0x0/0x2c8)
[<c034f804>] (mmc_io_rw_extended+0x0/0x1e4)
[<c0350b5c>] (sdio_io_rw_ext_helper+0x0/0x1ac)
[<c0350e00>] (sdio_memcpy_fromio+0x0/0x2c)
[<bf194464>] (wl1271_sdio_raw_read+0x0/0x1bc [wl12xx_sdio])
[<bf15ac14>] (wl1271_cmd_wait_for_event_or_timeout+0x0/0x19c [wl12xx])
[<bf15adb0>] (wl1271_cmd_wait_for_event+0x0/0x30 [wl12xx])
[<bf15b7dc>] (wl1271_cmd_disconnect+0x0/0x14c [wl12xx])
[<bf158fd0>] (wl1271_unjoin+0x0/0x48 [wl12xx])
[<bf159070>] (wl1271_op_config+0x0/0x490 [wl12xx])
[<bf105084>] (ieee80211_hw_config+0x0/0x14c [mac80211])
[<bf113120>] (ieee80211_recalc_idle+0x0/0x4c [mac80211])
[<bf109a70>] (__ieee80211_scan_completed+0x0/0x1ac [mac80211])
[<bf109fd4>] (ieee80211_scan_work+0x0/0x484 [mac80211])
[<c00a197c>] (worker_thread+0x0/0x1e8)
[<c00a5874>] (kthread+0x0/0x90)

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: initialize max_power levels for 11a channels

Set the maximum FW supported power levels for 11a channels.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
wl12xx: always initialize AP-mode max power level

Sometimes we only get the Tx power level via op->config when the FW is
off. Record the received power level when this happens and use it to
initialize the firmware during boot.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
batman-adv: initialise last_ttvn and tt_crc for the orig_node structure

The last_ttvn and tt_crc fields of the orig_node structure were not
initialised causing an immediate TT_REQ/RES dialogue even if not needed.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
batman-adv: keep local table consistency for further TT_RESPONSE

To keep transtable consistency among all the nodes, an originator must
not send not yet announced clients within a full table TT_RESPONSE.
Instead, deleted client have to be kept in the table in order to be sent
within an immediate TT_RESPONSE. In this way all the nodes in the
network will always provide the same response for the same request.

All the modification are committed at the next ttvn increment event.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
batman-adv: keep global table consistency in case of roaming

To keep consistency of other originator tables, new clients detected as
roamed, are kept in the global table but are marked as TT_CLIENT_PENDING
They are purged only when the new ttvn is received by the corresponding
originator. Moreover they need to be considered as removed in case of global
transtable lookup.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
batman-adv: request the full table if tt_crc doesn't match

In case of tt_crc mismatching for a certain orig_node after applying the
changes, the node must request the full table immediately.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
wl12xx: start/stop queues according to global per-AC counters

Split tx_queue_count to count per-AC skb's queued, instead of relying on
the skb-queue len. The skb queues used were only valid in STA-mode, as
AP-mode uses per-link queues.

This fixes a major regression in AP-mode, caused by the patch
"wl12xx: implement Tx watermarks per AC". With that patch applied, we
effectively had no regulation of Tx queues in AP-mode. Therefore a
sustained high rate of Tx could cause exhaustion of the skb memory pool.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>