Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) # SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) menuconfig DMABUF_HEAPS_ROCKCHIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 	bool "DMA-BUF Userland Memory Heaps for RockChip"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 	select DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 	  Choose this option to enable the RockChip DMA-BUF userland memory heaps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 	  This options creates per heap chardevs in /dev/rk_dma_heap/ which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	  allows userspace to allocate dma-bufs that can be shared
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	  between drivers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) config DMABUF_HEAPS_ROCKCHIP_CMA_HEAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	tristate "DMA-BUF RockChip CMA Heap"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	depends on DMABUF_HEAPS_ROCKCHIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	  Choose this option to enable dma-buf RockChip CMA heap. This heap is backed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	  by the Contiguous Memory Allocator (CMA). If your system has these
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	  regions, you should say Y here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) config DMABUF_HEAPS_ROCKCHIP_CMA_ALIGNMENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	int "Maximum PAGE_SIZE order of alignment for RockChip CMA Heap"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	range 0 12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	depends on DMABUF_HEAPS_ROCKCHIP_CMA_HEAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	default 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	  DMA mapping framework by default aligns all buffers to the smallest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	  PAGE_SIZE order which is greater than or equal to the requested buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	  size. This works well for buffers up to a few hundreds kilobytes, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	  for larger buffers it just a memory waste. With this parameter you can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	  specify the maximum PAGE_SIZE order for contiguous buffers. Larger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	  buffers will be aligned only to this specified order. The order is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	  expressed as a power of two multiplied by the PAGE_SIZE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	  For example, if your system defaults to 4KiB pages, the order value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	  of 8 means that the buffers will be aligned up to 1MiB only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	  If unsure, leave the default value "8".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) config DMABUF_RK_HEAPS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	bool "DMA-BUF RockChip Heap Debug"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	depends on DMABUF_HEAPS_ROCKCHIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	  Choose this option to enable dma-buf RockChip heap debug.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) config DMABUF_RK_HEAPS_DEBUG_PRINT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	bool "DMA-BUF RockChip Heap Debug print log enable"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	depends on DMABUF_HEAPS_ROCKCHIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	  Choose this option to enable dma-buf RockChip heap debug.