Commits
Suman Anna committed ed2d95b1520
HACK: ARM: dts: dra7-ipu-common: Revert to CMA pools for IPU early boots
The patch d1a42fca5944 ("TEMP: ARM: dts: dra7-ipu-common: Add a common
file for IPU early boots") converts the default CMA pools used in regular
remoteproc mode to carveouts/DMA pools for early-boot usage scenarios
using the "no-map" property to avoid the kernel from corrupting the
remoteproc firmware image sections.
The allocation scheme with DMA pools though is different than with CMA
pools, and this may cause some of the existing firmwares used in the
regular remoteproc mode with CMA to fail. The DMA pools may require a
number of changes in general:
- Split the firmware RSC_CARVEOUT sections into better aligned memory
regions conducive to the DMA pool allocation scheme.
- Increase the vmalloc size, as the DMA pools are no longer mapped by
default in kernel linear memory (for DDR < 2 GB) and needs to be
mapped into vmalloc space to be accessed. This may depend on system
configuration, number of remote cores using a DMA pool, and the sizes
of the DMA pools.
- Increase the size of the carveouts (last resort)
Revert back to CMA pools temporarily to make the current firmware images
be functional. A short-term fix would be to update the firmwares and the
long-term fix would be to eliminate the allocation logic altogether and
rely on fixed memory carveout support.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Angela Stegmaier <angelabaker@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>