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Revert "MIPS: Loongson64: Enable DMA noncoherent support" 

This reverts commit 3ee7e2faef which is
commit edc0378eee upstream.

There are reports of this causing build issues, so revert it from the
5.10.y tree for now.

Reported-by: Salvatore Bonaccorso <carnil@debian.org>
Link: https://lore.kernel.org/r/ZZE1X8m5PXJExffG@eldamar.lan
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2024-01-03 11:38:58 +01:00
parent 9175341bd8
commit ecd50f820d
3 changed files with 2 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/Kconfig
View File

@ -468,7 +468,6 @@ config MACH_LOONGSON2EF
config MACH_LOONGSON64
bool "Loongson 64-bit family of machines"
select ARCH_DMA_DEFAULT_COHERENT
select ARCH_SPARSEMEM_ENABLE
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_MIGHT_HAVE_PC_SERIO
@ -1380,7 +1379,6 @@ config CPU_LOONGSON64
select CPU_SUPPORTS_MSA
select CPU_DIEI_BROKEN if !LOONGSON3_ENHANCEMENT
select CPU_MIPSR2_IRQ_VI
select DMA_NONCOHERENT
select WEAK_ORDERING
select WEAK_REORDERING_BEYOND_LLSC
select MIPS_ASID_BITS_VARIABLE

3
arch/mips/include/asm/mach-loongson64/boot_param.h
View File

@ -117,8 +117,7 @@ struct irq_source_routing_table {
u64 pci_io_start_addr;
u64 pci_io_end_addr;
u64 pci_config_addr;
u16 dma_mask_bits;
u16 dma_noncoherent;
u32 dma_mask_bits;
} __packed;
struct interface_info {

10
arch/mips/loongson64/env.c
View File

@ -13,8 +13,6 @@
* Copyright (C) 2009 Lemote Inc.
* Author: Wu Zhangjin, wuzhangjin@gmail.com
*/
#include <linux/dma-map-ops.h>
#include <linux/export.h>
#include <linux/pci_ids.h>
#include <asm/bootinfo.h>
@ -133,14 +131,8 @@ void __init prom_init_env(void)
loongson_sysconf.pci_io_base = eirq_source->pci_io_start_addr;
loongson_sysconf.dma_mask_bits = eirq_source->dma_mask_bits;
if (loongson_sysconf.dma_mask_bits < 32 ||
loongson_sysconf.dma_mask_bits > 64) {
loongson_sysconf.dma_mask_bits > 64)
loongson_sysconf.dma_mask_bits = 32;
dma_default_coherent = true;
} else {
dma_default_coherent = !eirq_source->dma_noncoherent;
}
pr_info("Firmware: Coherent DMA: %s\n", dma_default_coherent ? "on" : "off");
loongson_sysconf.restart_addr = boot_p->reset_system.ResetWarm;
loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown;