AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/mips
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Paul Burton 5ec17af7ea
MIPS: Boston: Disable EG20T prefetch 
The Intel EG20T Platform Controller Hub used on the MIPS Boston
development board supports prefetching memory to optimize DMA transfers.
Unfortunately for unknown reasons this doesn't work well with some MIPS
CPUs such as the P6600, particularly when using an I/O Coherence Unit
(IOCU) to provide cache-coherent DMA. In these systems it is common for
DMA data to be lost, resulting in broken access to EG20T devices such as
the MMC or SATA controllers.

Support for a DT property to configure the prefetching was added a while
back by commit 549ce8f134 ("misc: pch_phub: Read prefetch value from
device tree if passed") but we never added the DT snippet to make use of
it. Add that now in order to disable the prefetching & fix DMA on the
affected systems.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21068/
Cc: linux-mips@linux-mips.org
2018-11-09 17:20:17 -08:00
..
alchemy mtd: rawnand: Move platform_nand_xxx definitions out of rawnand.h 2018-10-03 11:12:25 +02:00
ar7 mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
ath25 mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
ath79 mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
bcm47xx MIPS: BCM47XX: Enable USB power on Netgear WNDR3400v3 2018-08-29 11:11:00 -07:00
bcm63xx mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
bmips mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
boot MIPS: Boston: Disable EG20T prefetch 2018-11-09 17:20:17 -08:00
cavium-octeon mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
cobalt
configs MIPS: DEC: Add 64-bit DECstation defconfig 2018-11-06 15:37:24 -08:00
crypto MIPS: crypto: Add crc32 and crc32c hw accelerated module 2018-02-19 20:50:36 +00:00
dec mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
emma mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
fw mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
generic MIPS: mscc: add PCB120 to the ocelot fitImage 2018-10-09 10:38:29 -07:00
include MIPS: Avoid using .set mips0 to restore ISA 2018-11-09 10:23:19 -08:00
jazz mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
jz4740 JFFS2 changes: 2018-08-14 10:57:44 -07:00
kernel MIPS: Don't dump Hi & Lo regs on >= MIPSr6 2018-11-09 17:20:12 -08:00
kvm MIPS: Introduce CONFIG_MIPS_FP_SUPPORT 2018-11-09 10:23:15 -08:00
lantiq mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
lasat mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
lib MIPS: lib: Use kernel_pref & user_pref in memcpy() 2018-10-15 23:11:14 -07:00
loongson32 MIPS: Loongson: Merge load addresses 2018-07-30 18:59:01 -07:00
loongson64 MIPS: Simplify FP context initialization 2018-11-09 10:23:13 -08:00
math-emu MIPS: Ensure emulated FP sets PF_USED_MATH 2018-11-09 10:23:14 -08:00
mm mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
mti-malta mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
net bpf, mips: remove unused function 2018-05-14 19:11:45 -07:00
netlogic mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
oprofile MIPS: perf: More robustly probe for the presence of per-tc counters 2018-05-15 15:16:16 +01:00
paravirt mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pci mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
pic32 mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pistachio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmcs-msp71xx MIPS: Remove no-op/identity casts 2018-08-31 11:49:20 -07:00
pnx833x mtd: rawnand: Move platform_nand_xxx definitions out of rawnand.h 2018-10-03 11:12:25 +02:00
power License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ralink mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
rb532 mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
sgi-ip22 MIPS: Remove no-op/identity casts 2018-08-31 11:49:20 -07:00
sgi-ip27 mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
sgi-ip32 MIPS: IP32: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
sibyte mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
sni MIPS: sni: Remove the read_persistent_clock() 2018-05-14 23:58:25 +01:00
tools MIPS: Use a custom elf-entry program to find kernel entry point 2018-08-30 09:39:22 -07:00
txx9 mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
vdso kbuild: replace cc-name test with CONFIG_CC_IS_CLANG 2018-11-02 22:49:00 +09:00
vr41xx MIPS: Annotate cpu_wait implementations with __cpuidle 2018-06-28 14:18:54 -07:00
Kbuild MIPS: Disable Werror when W= is set 2017-04-10 11:56:07 +02:00
Kbuild.platforms MIPS: Xilfpga: Switch to using generic defconfigs 2017-11-08 22:54:14 +00:00
Kconfig MIPS: Allow FP support to be disabled 2018-11-09 10:23:19 -08:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile MIPS: Don't compile math-emu when CONFIG_MIPS_FP_SUPPORT=n 2018-11-09 10:23:18 -08:00
Makefile.postlink License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00