On Tue, Apr 09, 2024 at 02:06:05PM +0200, Pascal FONTAIN wrote: > From: Andrew Davis <afd@xxxxxx> > > This new export type exposes to userspace the SRAM area as a DMA-BUF > Heap, > this allows for allocations of DMA-BUFs that can be consumed by various > DMA-BUF supporting devices. > > Signed-off-by: Andrew Davis <afd@xxxxxx> > Tested-by: Pascal Fontain <pascal.fontain@xxxxxxxxxxxxx> When sending on a patch from someone else, you too must sign off on it as per our documenation. Please read it and understand what you are agreeing to when you do that for a new version please. > --- > drivers/misc/Kconfig | 7 + > drivers/misc/Makefile | 1 + > drivers/misc/sram-dma-heap.c | 246 +++++++++++++++++++++++++++++++++++ > drivers/misc/sram.c | 6 + > drivers/misc/sram.h | 16 +++ > 5 files changed, 276 insertions(+) > create mode 100644 drivers/misc/sram-dma-heap.c > > diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig > index 9e4ad4d61f06..e6674e913168 100644 > --- a/drivers/misc/Kconfig > +++ b/drivers/misc/Kconfig > @@ -448,6 +448,13 @@ config SRAM > config SRAM_EXEC > bool > > +config SRAM_DMA_HEAP > + bool "Export on-chip SRAM pools using DMA-Heaps" > + depends on DMABUF_HEAPS && SRAM > + help > + This driver allows the export of on-chip SRAM marked as both pool > + and exportable to userspace using the DMA-Heaps interface. What will use this in userspace? thanks, greg k-h
