mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
c23be918c5
Prabhakar <prabhakar.csengg@gmail.com> says:
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
non-coherent DMA support for AX45MP
====================================
On the Andes AX45MP core, cache coherency is a specification option so it
may not be supported. In this case DMA will fail. To get around with this
issue this patch series does the below:
1] Andes alternative ports is implemented as errata which checks if the
IOCP is missing and only then applies to CMO errata. One vendor specific
SBI EXT (ANDES_SBI_EXT_IOCP_SW_WORKAROUND) is implemented as part of
errata.
Below are the configs which Andes port provides (and are selected by
RZ/Five):
- ERRATA_ANDES
- ERRATA_ANDES_CMO
OpenSBI patch supporting ANDES_SBI_EXT_IOCP_SW_WORKAROUND SBI is now
part v1.3 release.
2] Andes AX45MP core has a Programmable Physical Memory Attributes (PMA)
block that allows dynamic adjustment of memory attributes in the runtime.
It contains a configurable amount of PMA entries implemented as CSR
registers to control the attributes of memory locations in interest.
OpenSBI configures the PMA regions as required and creates a reserve memory
node and propagates it to the higher boot stack.
Currently OpenSBI (upstream) configures the required PMA region and passes
this a shared DMA pool to Linux.
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;
pma_resv0@58000000 {
compatible = "shared-dma-pool";
reg = <0x0 0x58000000 0x0 0x08000000>;
no-map;
linux,dma-default;
};
};
The above shared DMA pool gets appended to Linux DTB so the DMA memory
requests go through this region.
3] We provide callbacks to synchronize specific content between memory and
cache.
4] RZ/Five SoC selects the below configs
- AX45MP_L2_CACHE
- DMA_GLOBAL_POOL
- ERRATA_ANDES
- ERRATA_ANDES_CMO
----------x---------------------x--------------------x---------------x----
* b4-shazam-merge:
soc: renesas: Kconfig: Select the required configs for RZ/Five SoC
cache: Add L2 cache management for Andes AX45MP RISC-V core
dt-bindings: cache: andestech,ax45mp-cache: Add DT binding documentation for L2 cache controller
riscv: mm: dma-noncoherent: nonstandard cache operations support
riscv: errata: Add Andes alternative ports
riscv: asm: vendorid_list: Add Andes Technology to the vendors list
Link: https://lore.kernel.org/r/20230818135723.80612-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
246 lines
3.9 KiB
Text
246 lines
3.9 KiB
Text
# SPDX-License-Identifier: GPL-2.0
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menu "Device Drivers"
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# Keep I/O buses first
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source "drivers/amba/Kconfig"
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source "drivers/eisa/Kconfig"
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source "drivers/pci/Kconfig"
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source "drivers/cxl/Kconfig"
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source "drivers/pcmcia/Kconfig"
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source "drivers/rapidio/Kconfig"
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source "drivers/base/Kconfig"
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source "drivers/bus/Kconfig"
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source "drivers/cache/Kconfig"
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source "drivers/connector/Kconfig"
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source "drivers/firmware/Kconfig"
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source "drivers/gnss/Kconfig"
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source "drivers/mtd/Kconfig"
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source "drivers/of/Kconfig"
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source "drivers/parport/Kconfig"
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source "drivers/pnp/Kconfig"
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source "drivers/block/Kconfig"
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source "drivers/nvme/Kconfig"
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source "drivers/misc/Kconfig"
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source "drivers/scsi/Kconfig"
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source "drivers/ata/Kconfig"
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source "drivers/md/Kconfig"
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source "drivers/target/Kconfig"
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source "drivers/message/fusion/Kconfig"
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source "drivers/firewire/Kconfig"
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source "drivers/macintosh/Kconfig"
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source "drivers/net/Kconfig"
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source "drivers/isdn/Kconfig"
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# input before char - char/joystick depends on it. As does USB.
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source "drivers/input/Kconfig"
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source "drivers/char/Kconfig"
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source "drivers/i2c/Kconfig"
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source "drivers/i3c/Kconfig"
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source "drivers/spi/Kconfig"
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source "drivers/spmi/Kconfig"
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source "drivers/hsi/Kconfig"
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source "drivers/pps/Kconfig"
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source "drivers/ptp/Kconfig"
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source "drivers/pinctrl/Kconfig"
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source "drivers/gpio/Kconfig"
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source "drivers/w1/Kconfig"
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source "drivers/power/Kconfig"
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source "drivers/hwmon/Kconfig"
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source "drivers/thermal/Kconfig"
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source "drivers/watchdog/Kconfig"
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source "drivers/ssb/Kconfig"
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source "drivers/bcma/Kconfig"
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source "drivers/mfd/Kconfig"
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source "drivers/regulator/Kconfig"
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source "drivers/media/Kconfig"
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source "drivers/video/Kconfig"
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source "drivers/accel/Kconfig"
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source "sound/Kconfig"
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source "drivers/hid/Kconfig"
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source "drivers/usb/Kconfig"
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source "drivers/mmc/Kconfig"
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source "drivers/ufs/Kconfig"
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source "drivers/memstick/Kconfig"
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source "drivers/leds/Kconfig"
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source "drivers/accessibility/Kconfig"
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source "drivers/infiniband/Kconfig"
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source "drivers/edac/Kconfig"
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source "drivers/rtc/Kconfig"
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source "drivers/dma/Kconfig"
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source "drivers/dma-buf/Kconfig"
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source "drivers/dca/Kconfig"
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source "drivers/uio/Kconfig"
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source "drivers/vfio/Kconfig"
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source "drivers/vlynq/Kconfig"
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source "drivers/virt/Kconfig"
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source "drivers/virtio/Kconfig"
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source "drivers/vdpa/Kconfig"
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source "drivers/vhost/Kconfig"
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source "drivers/hv/Kconfig"
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source "drivers/xen/Kconfig"
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source "drivers/greybus/Kconfig"
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source "drivers/comedi/Kconfig"
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source "drivers/staging/Kconfig"
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source "drivers/platform/Kconfig"
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source "drivers/clk/Kconfig"
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source "drivers/hwspinlock/Kconfig"
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source "drivers/clocksource/Kconfig"
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source "drivers/mailbox/Kconfig"
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source "drivers/iommu/Kconfig"
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source "drivers/remoteproc/Kconfig"
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source "drivers/rpmsg/Kconfig"
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source "drivers/soundwire/Kconfig"
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source "drivers/soc/Kconfig"
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source "drivers/devfreq/Kconfig"
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source "drivers/extcon/Kconfig"
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source "drivers/memory/Kconfig"
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source "drivers/iio/Kconfig"
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source "drivers/ntb/Kconfig"
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source "drivers/pwm/Kconfig"
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source "drivers/irqchip/Kconfig"
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source "drivers/ipack/Kconfig"
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source "drivers/reset/Kconfig"
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source "drivers/phy/Kconfig"
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source "drivers/powercap/Kconfig"
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source "drivers/mcb/Kconfig"
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source "drivers/perf/Kconfig"
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source "drivers/ras/Kconfig"
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source "drivers/thunderbolt/Kconfig"
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source "drivers/android/Kconfig"
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source "drivers/gpu/trace/Kconfig"
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source "drivers/nvdimm/Kconfig"
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source "drivers/dax/Kconfig"
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source "drivers/nvmem/Kconfig"
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source "drivers/hwtracing/Kconfig"
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source "drivers/fpga/Kconfig"
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source "drivers/fsi/Kconfig"
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source "drivers/tee/Kconfig"
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source "drivers/mux/Kconfig"
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source "drivers/opp/Kconfig"
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source "drivers/siox/Kconfig"
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source "drivers/slimbus/Kconfig"
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source "drivers/interconnect/Kconfig"
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source "drivers/counter/Kconfig"
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source "drivers/most/Kconfig"
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source "drivers/peci/Kconfig"
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source "drivers/hte/Kconfig"
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source "drivers/cdx/Kconfig"
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endmenu
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