1. 06 Feb, 2016 8 commits
  2. 01 Feb, 2016 28 commits
  3. 31 Jan, 2016 3 commits
    • Sara Sharon's avatar
      iwlwifi: pcie: add 9000 series multi queue rx DMA support · 96a6497b
      Sara Sharon authored
      The 9000 series introduces several changes in the device
      DMA operation.
      As the device now supports multi-queue rx, several DMA channels
      should be configured.
      The flows of providing the device with the allocated RBDs now
      changes as well - the device maintains a separate table of used
      and free table.
      
      The hardware may use the free table to feed RBDs to any queue.
      This requires maintaing a shared table to map returned RBDs to
      the original RXB - for that purpose the VID is introduced - an
      internal identifier of the RB placed in the lower 12 bits and
      returned by HW in the used data.
      
      Another change is the support of 64 bit DMA address.
      Signed-off-by: default avatarSara Sharon <sara.sharon@intel.com>
      Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      96a6497b
    • Sara Sharon's avatar
      iwlwifi: pcie: add infrastructure for multi-queue rx · 78485054
      Sara Sharon authored
      The 9000 series devices will support multi rx queues.
      Current code has one static rx queue - change it to allocate
      a number of queues per the device capability (pre-9000 devices
      have the number of rx queues set to one).
      
      Subsequent generalizations are:
      
      Change the code to access an explicit numbered rx queue only
      when the queue number is known - when handling interrupt, when
      accessing the default queue and when iterating the queues.
      The rest of the functions will receive the rx queue as a pointer.
      
      Generalize the warning in allocation failure to consider the
      allocator status instead of a single rx queue status.
      
      Move the rx initial pool of memory buffers to be shared among
      all the queues and allocated to the default queue on init.
      Signed-off-by: default avatarSara Sharon <sara.sharon@intel.com>
      Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      78485054
    • Emmanuel Grumbach's avatar
      iwlwifi: pcie: buffer packets to avoid overflowing Tx queues · 3955525d
      Emmanuel Grumbach authored
      When the Tx queues are full above a threshold, we
      immediately stop the mac80211's queue to stop getting new
      packets. This worked until TSO was enabled.
      With TSO, one single packet from mac80211 can use many
      descriptors since a large send needs to be split into
      several segments.
      This means that stopping mac80211's queues is not enough
      and we also need to ensure that we don't overflow the Tx
      queues with one single packet from mac80211.
      Add code to transport layer to do just that. Stop
      mac80211's queue as soon as the queue is full above the
      same threshold as before, and keep pushing the current
      packet along with its segments on the queue, but check
      that we don't overflow. If that would happen, buffer the
      segments, and send them when there is room in the Tx queue
      again. Of course, we first need to send the buffered
      segments and only then, wake up mac80211's queues.
      Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      3955525d
  4. 29 Jan, 2016 1 commit