Commits on Sep 27, 2024

1. ASoC: SOF: Intel: hda: Add support for persistent Code Loader DMA buf… …

   …fers
   
   It has been reported that the DMA memory allocation for firmware download
   can fail after extended period of uptime on systems with relatively small
   amount of RAM when the system memory becomes fragmented.
   
   The issue primarily happens  when the system is waking up from system
   suspend, swap might not be available and the MM system cannot move things
   around to allow for successful allocation.
   
   If the IMR boot is not supported then for each DSP boot we would need to
   allocate the DMA buffer for firmware transfer, which can increase the
   chances of the issue to be hit.
   
   This patch adds support for allocating the DMA buffers once at first boot
   time and keep it until the system is shut down, rebooted or the drivers
   re-loaded and makes this as the default operation.
   
   With persistent_cl_buffer module parameter the persistent Code Loader
   DMA buffer can be disabled to fall back to on demand allocation.
   
   Signed-off-by: Peter Ujfalusi <[email protected]>

   

   ujfalusi committed Sep 27, 2024
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