From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> The RISC-V ISA doesn't yet specify how to query or modify PMAs, so let vendors define the custom properties of memory regions in PTE. This patchset helps SOC vendors to support their own custom interconnect coherent solution with PTE attributes. For example, allwinner D1[1] uses T-HEAD C906 as main processor, C906 has two modes in MMU: - Compatible mode, the same as the definitions in spec. - Enhanced mode, add custom DMA_COHERENT attribute bits in PTE which not mentioned in spec. Allwinner D1 needs the enhanced mode to support the DMA type device with non-coherent interconnect in its SOC. C906 uses BITS(63 - 59) as custom attribute bits in PTE. The patchset contain 4 parts (asid, pgtable, cmo, soc) which have been tested on D1: - asid: T-HEAD C906 of D1 contains full asid hw facilities which has no conflict with RISC-V spec, and hope these patches soon could be approved. - pgtable: Using a image-hdr to pass vendor specific information and setup custom PTE attributes in a global struct variable during boot stage. Also it needs define custom protection_map in linux/mm. - cmo: We need deal with dma_sync & icache_sync & __vdso_icache_sync. In this patchset, I just show you how T-HEAD C9xx work, and seems Atish is working for the DMA infrustructure, please let me know the idea. - soc: Add allwinner gmac driver & dts & Kconfig for sunxi test. The patchset could work with linux-5.13-rc4, here is the steps for D1: - Download linux-5.13-rc4 and apply the patchset - make ARCH=riscv CROSS_COMPILE=riscv64-linux- defconfig - make ARCH=riscv CROSS_COMPILE=riscv64-linux- Image modules dtbs - mkimage -A riscv -O linux -T kernel -C none -a 0x00200000 -e 0x00200000 -n Linux -d arch/riscv/boot/Image uImage - Download newest opensbi [2], build with [3], and get fw_dynamic.bin - Copy uImage, fw_dynamic.bin, allwinner-d1-nezha-kit.dtb into boot partition of TF card. - Plugin the TF card and power on D1. Link: https://linux-sunxi.org/D1 [1] Link: https://github.com/riscv/opensbi branch:master [2] Link: https://github.com/riscv/opensbi/blob/master/docs/platform/thead-c9xx.md [3] Changes since v1: - Rebase on linux-5.13-rc4 - Support defconfig for different PTE attributes - Support C906 icache_sync - Add Allwinner D1 dts & Kconfig & gmac for testing - Add asid optimization for D1 usage Guo Ren (10): riscv: asid: Use global mappings for kernel pages riscv: asid: Add ASID-based tlbflushing methods riscv: asid: Optimize tlbflush coding convention riscv: pgtable: Fixup _PAGE_CHG_MASK usage riscv: pgtable: Add custom protection_map init riscv: pgtable: Add DMA_COHERENT with custom PTE attributes riscv: cmo: Add dma-noncoherency support riscv: cmo: Add vendor custom icache sync riscv: soc: Initial DTS for Allwinner D1 NeZha board riscv: soc: Add Allwinner SoC kconfig option liush (1): riscv: soc: Allwinner D1 GMAC driver only for temp use arch/riscv/Kconfig | 9 + arch/riscv/Kconfig.socs | 12 + arch/riscv/boot/dts/Makefile | 1 + arch/riscv/boot/dts/allwinner/Makefile | 2 + .../boot/dts/allwinner/allwinner-d1-nezha-kit.dts | 29 + arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi | 100 + arch/riscv/configs/defconfig | 1 + arch/riscv/include/asm/cacheflush.h | 48 +- arch/riscv/include/asm/mmu_context.h | 2 + arch/riscv/include/asm/pgtable-64.h | 8 +- arch/riscv/include/asm/pgtable-bits.h | 20 +- arch/riscv/include/asm/pgtable.h | 44 +- arch/riscv/include/asm/sbi.h | 15 + arch/riscv/include/asm/soc.h | 1 + arch/riscv/include/asm/tlbflush.h | 22 + arch/riscv/include/asm/vendorid_list.h | 1 + arch/riscv/kernel/sbi.c | 19 + arch/riscv/kernel/soc.c | 22 + arch/riscv/kernel/vdso/flush_icache.S | 33 +- arch/riscv/mm/Makefile | 1 + arch/riscv/mm/cacheflush.c | 3 +- arch/riscv/mm/context.c | 2 +- arch/riscv/mm/dma-mapping.c | 53 + arch/riscv/mm/init.c | 26 + arch/riscv/mm/tlbflush.c | 57 +- drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/allwinnertmp/Kconfig | 17 + drivers/net/ethernet/allwinnertmp/Makefile | 7 + drivers/net/ethernet/allwinnertmp/sunxi-gmac-ops.c | 690 ++++++ drivers/net/ethernet/allwinnertmp/sunxi-gmac.c | 2240 ++++++++++++++++++++ drivers/net/ethernet/allwinnertmp/sunxi-gmac.h | 258 +++ drivers/net/phy/realtek.c | 2 +- mm/mmap.c | 4 + 34 files changed, 3714 insertions(+), 37 deletions(-) create mode 100644 arch/riscv/boot/dts/allwinner/Makefile create mode 100644 arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts create mode 100644 arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi create mode 100644 arch/riscv/mm/dma-mapping.c create mode 100644 drivers/net/ethernet/allwinnertmp/Kconfig create mode 100644 drivers/net/ethernet/allwinnertmp/Makefile create mode 100644 drivers/net/ethernet/allwinnertmp/sunxi-gmac-ops.c create mode 100644 drivers/net/ethernet/allwinnertmp/sunxi-gmac.c create mode 100644 drivers/net/ethernet/allwinnertmp/sunxi-gmac.h -- 2.7.4
