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  1. 04 Mar, 2011 28 commits
  3. 03 Mar, 2011 12 commits
    • Fry, Donald H's avatar
      iwlagn: report correct temperature for WiFi/BT devices. · f8f79a5d
      Fry, Donald H authored 
      The temperature reported by 'cat /sys/class/net/wlan?/device/temperature'
is incorrect for devices with BT capability.  Report the value from the
correct statistics structure.  Tested with 130, 100, 6205 and 5300.
Signed-off-by: default avatarDon Fry <donald.h.fry@intel.com>
Signed-off-by: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
      f8f79a5d
    • Helmut Schaa's avatar
      wl12xx: Correctly set up protection if non-GF STAs are present · 95a77610
      Helmut Schaa authored 
      Set the gf_protection bit when calling ACX_HT_BSS_OPERATION according
to the GF bit passed by mac80211 in ht_operation_mode.

[Added a proper commit message -- Luca]
Signed-off-by: default avatarHelmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      95a77610
    • Arik Nemtsov's avatar
      wl12xx: wakeup chip from ELP during scan · 24225b37
      Arik Nemtsov authored 
      Commands are sometimes sent to FW on scan completion. Make sure the chip
is awake to receive them. Sending commands while the chip is in ELP
can cause SDIO read errors and/or crash the FW.
Signed-off-by: default avatarArik Nemtsov <arik@wizery.com>
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      24225b37
    • Ido Yariv's avatar
      wl12xx: Modify requested number of memory blocks · b16d4b68
      Ido Yariv authored 
      Tests have shown that the requested number of memory blocks is
sub-optimal. Slightly modify the requested number of memory blocks for
TX.
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Reviewed-by: default avatarLuciano Coelho <coelho@ti.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      b16d4b68
    • Ido Yariv's avatar
      wl12xx: Avoid redundant TX work · b07d4037
      Ido Yariv authored 
      TX might be handled in the threaded IRQ handler, in which case, TX work
might be scheduled just to discover it has nothing to do.

Save a few context switches by cancelling redundant TX work in case TX
is about to be handled in the threaded IRQ handler. Also, avoid
scheduling TX work from wl1271_op_tx if not needed.
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Reviewed-by: default avatarLuciano Coelho <coelho@ti.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      b07d4037
    • Ido Yariv's avatar
      wl12xx: Switch to level trigger interrupts · 2da69b89
      Ido Yariv authored 
      The interrupt of the wl12xx is a level interrupt in nature, since the
interrupt line is not auto-reset. However, since resetting the interrupt
requires bus transactions, this cannot be done from an interrupt
context. Thus, requesting a level interrupt would require to disable the
irq and re-enable it after the HW is acknowledged. Since we now request
a threaded irq, this can also be done by specifying the IRQF_ONESHOT
flag.

Triggering on an edge can be problematic in some platforms, if the
sampling frequency is not sufficient for detecting very frequent
interrupts. In case an interrupt is missed, the driver will hang as the
interrupt line will stay high until it is acknowledged by the driver,
which will never happen.

Fix this by requesting a level triggered interrupt, with the
IRQF_ONESHOT flag.
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Reviewed-by: default avatarLuciano Coelho <coelho@ti.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      2da69b89
    • Ido Yariv's avatar
      wl12xx: Switch to a threaded interrupt handler · a620865e
      Ido Yariv authored 
      To achieve maximal throughput, it is very important to react to
interrupts as soon as possible. Currently the interrupt handler wakes up
a worker for handling interrupts in process context. A cleaner and more
efficient design would be to request a threaded interrupt handler.  This
handler's priority is very high, and can do blocking operations such as
SDIO/SPI transactions.

Some work can be deferred, mostly calls to mac80211 APIs
(ieee80211_rx_ni and ieee80211_tx_status). By deferring such work to a
different worker, we can keep the irq handler thread more I/O
responsive. In addition, on multi-core systems the two threads can be
scheduled on different cores, which will improve overall performance.

The use of WL1271_FLAG_IRQ_PENDING & WL1271_FLAG_IRQ_RUNNING was
changed. For simplicity, always query the FW for more pending
interrupts. Since there are relatively long bursts of interrupts, the
extra FW status read overhead is negligible. In addition, this enables
registering the IRQ handler with the ONESHOT option.
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Reviewed-by: default avatarLuciano Coelho <coelho@ti.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      a620865e
    • Ido Yariv's avatar
      wl12xx: Change claiming of the SDIO bus · 393fb560
      Ido Yariv authored 
      The SDIO bus is claimed and released for each SDIO transaction. In
addition to the few CPU cycles it takes to claim and release the bus, it
may also cause undesired side effects such as the MMC host stopping its
internal clocks.

Since only the wl12xx_sdio driver drives this SDIO card, it is safe to
claim the SDIO host once (on power on), and release it only when turning
the power off.

This patch was inspired by Juuso Oikarinen's (juuso.oikarinen@nokia.com)
patch "wl12xx: Change claiming of the (SDIO) bus".
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Reviewed-by: default avatarLuciano Coelho <coelho@ti.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      393fb560
    • Ido Yariv's avatar
      wl12xx: Do end-of-transactions transfers only if needed · 606ea9fa
      Ido Yariv authored 
      On newer hardware revisions, there is no need to write the host's
counter at the end of a RX transaction. The same applies to writing the
number of packets at the end of a TX transaction.

It is generally a good idea to avoid unnecessary SDIO/SPI transfers.
Throughput and CPU usage are improved when avoiding these.

Send the host's RX counter and the TX packet count only if needed, based
on the hardware revision.

[Changed WL12XX_QUIRK_END_OF_TRANSACTION to use BIT(0) -- Luca]
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Signed-off-by: default avatarOhad Ben-Cohen <ohad@wizery.com>
Reviewed-by: default avatarLuciano Coelho <coelho@ti.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      606ea9fa
    • Ido Yariv's avatar
      wl12xx: Reorder data handling in irq_work · 8aad2464
      Ido Yariv authored 
      The FW has a limited amount of memory for holding frames. In case it
runs out of memory reserved for RX frames, it'll have no other choice
but to drop packets received from the AP. Thus, it is important to
handle RX data interrupts as soon as possible, before handling anything
else.

In addition, since there are enough TX descriptors to go around, it is
better to first send TX frames, and only then handle TX completions.

Fix this by changing the order of function calls in wl1271_irq_work.
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Signed-off-by: default avatarOhad Ben-Cohen <ohad@wizery.com>
Reviewed-by: default avatarLuciano Coelho <coelho@ti.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      8aad2464
    • Ido Yariv's avatar
      wl12xx: Remove private headers in wl1271_tx_reset · 50e9f746
      Ido Yariv authored 
      Frames in the tx_frames array include extra private headers, which must
be removed before passing the skbs to ieee80211_tx_status.

Fix this by removing any private headers in wl1271_tx_reset, similar to
how this is done in wl1271_tx_complete_packet.
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Signed-off-by: default avatarArik Nemtsov <arik@wizery.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      50e9f746
    • Ido Yariv's avatar
      wl12xx: Don't rely on runtime PM for toggling power · 11251e7e
      Ido Yariv authored 
      Runtime PM might not always be enabled. Even if it is enabled in the
running kernel, it can still be temporarily disabled, for instance
during suspend. Runtime PM is opportunistic in nature, and should not be
relied on for toggling power.

In case the interface is removed and re-added while runtime PM is
disabled, the FW will fail to boot, as it is mandatory to toggle power
between boots. For instance, this can happen during suspend in case one
of the devices fails to suspend before the MMC host suspends, but after
mac80211 was suspended. The interface will be removed and reactivated
without toggling the power.

Fix this by calling mmc_power_save_host/mmc_power_restore_host in
wl1271_sdio_power_on/off functions. It will toggle the power to the chip
even if runtime PM is disabled. The runtime PM functions should still be
called to make sure runtime PM does not opportunistically power the chip
off (e.g. after resuming from system suspend).
Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Signed-off-by: default avatarOhad Ben-Cohen <ohad@wizery.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
      11251e7e
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