[RFC PATCH v2 00/11] riscv: Add DMA_COHERENT support for Allwinner D1
Jernej Škrabec
jernej.skrabec at gmail.com
Sun Jun 6 10:14:02 PDT 2021
Dne nedelja, 06. junij 2021 ob 18:54:05 CEST je Guo Ren napisal(a):
> V5 is not related to the patch series.
Don't top post.
If that's the case, then your e-mail client messed things up. I got V5 patches
in the same thread as board enablement patches and so did mailing list [1].
Best regards,
Jernej
[1] https://lore.kernel.org/linux-sunxi/
CAJF2gTQ1yvSNthJ2yJkqaYGaJ6OYmf0vbG=hm4ocgnw4DiZbOw at mail.gmail.com/T/#t
>
> On Mon, Jun 7, 2021 at 12:29 AM Jernej Škrabec <jernej.skrabec at gmail.com>
wrote:
> > Hi!
> >
> > Dne nedelja, 06. junij 2021 ob 11:03:55 CEST je guoren at kernel.org
napisal(a):
> > > From: Guo Ren <guoren at linux.alibaba.com>
> > >
> > > 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]
> >
> > Some patches are marked with v2 and some V5. It's very confusing. Mark
> > them
> > with same version in next revision.
> >
> > Best regards,
> > Jernej
> >
> > > 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
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