From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: robh+dt@kernel.org, catalin.marinas@arm.com, hch@lst.de,
ardb@kernel.org, linux-kernel@vger.kernel.org,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
jeremy.linton@arm.com, iommu@lists.linux-foundation.org,
linux-rpi-kernel@lists.infradead.org
Subject: [PATCH v3 5/8] dma-direct: Turn zone_dma_bits default value into a define
Date: Wed, 14 Oct 2020 21:12:07 +0200 [thread overview]
Message-ID: <20201014191211.27029-6-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20201014191211.27029-1-nsaenzjulienne@suse.de>
Set zone_dma_bits default value through a define so as for architectures
to be able to override it with their default value.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
include/linux/dma-direct.h | 3 +++
kernel/dma/direct.c | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index 18aade195884..e433d90cbacf 100644
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -12,6 +12,9 @@
#include <linux/mem_encrypt.h>
#include <linux/swiotlb.h>
+#ifndef ZONE_DMA_BITS_DEFAULT
+#define ZONE_DMA_BITS_DEFAULT 24
+#endif
extern unsigned int zone_dma_bits;
/*
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 06c111544f61..c0d97f536e93 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -20,7 +20,7 @@
* it for entirely different regions. In that case the arch code needs to
* override the variable below for dma-direct to work properly.
*/
-unsigned int zone_dma_bits __ro_after_init = 24;
+unsigned int zone_dma_bits __ro_after_init = ZONE_DMA_BITS_DEFAULT;
static inline dma_addr_t phys_to_dma_direct(struct device *dev,
phys_addr_t phys)
--
2.28.0
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next prev parent reply other threads:[~2020-10-14 19:12 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-14 19:12 [PATCH v3 0/8] arm64: Default to 32-bit wide ZONE_DMA Nicolas Saenz Julienne
2020-10-14 19:12 ` [PATCH v3 1/8] arm64: mm: Move reserve_crashkernel() into mem_init() Nicolas Saenz Julienne
2020-10-15 8:40 ` Will Deacon
2020-10-15 8:55 ` Nicolas Saenz Julienne
2020-10-14 19:12 ` [PATCH v3 2/8] arm64: mm: Move zone_dma_bits initialization into zone_sizes_init() Nicolas Saenz Julienne
2020-10-14 19:12 ` [PATCH v3 3/8] of/address: Introduce of_dma_get_max_cpu_address() Nicolas Saenz Julienne
2020-10-14 22:02 ` Rob Herring
2020-10-15 6:56 ` Ard Biesheuvel
2020-10-15 9:16 ` Nicolas Saenz Julienne
2020-10-15 9:18 ` Ard Biesheuvel
2020-10-15 8:54 ` Nicolas Saenz Julienne
2020-10-15 5:42 ` Christoph Hellwig
2020-10-15 10:03 ` Nicolas Saenz Julienne
2020-10-16 13:19 ` Rob Herring
2020-10-14 19:12 ` [PATCH v3 4/8] of: unittest: Add test for of_dma_get_max_cpu_address() Nicolas Saenz Julienne
2020-10-14 22:04 ` Rob Herring
2020-10-15 9:51 ` Nicolas Saenz Julienne
2020-10-14 19:12 ` Nicolas Saenz Julienne [this message]
2020-10-15 5:38 ` [PATCH v3 5/8] dma-direct: Turn zone_dma_bits default value into a define Christoph Hellwig
2020-10-15 10:05 ` Nicolas Saenz Julienne
2020-10-14 19:12 ` [PATCH v3 6/8] arm64: mm: Set ZONE_DMA size based on devicetree's dma-ranges Nicolas Saenz Julienne
2020-10-15 5:39 ` Christoph Hellwig
2020-10-15 10:05 ` Nicolas Saenz Julienne
2020-10-14 19:12 ` [PATCH v3 7/8] arm64: mm: Set ZONE_DMA size based on early IORT scan Nicolas Saenz Julienne
2020-10-15 10:31 ` Lorenzo Pieralisi
2020-10-16 6:56 ` Ard Biesheuvel
2020-10-15 14:26 ` Hanjun Guo
2020-10-15 15:15 ` Nicolas Saenz Julienne
2020-10-15 18:03 ` Catalin Marinas
2020-10-16 6:51 ` Hanjun Guo
2020-10-16 6:54 ` Ard Biesheuvel
2020-10-16 7:27 ` Hanjun Guo
2020-10-16 7:34 ` Hanjun Guo
2020-10-14 19:12 ` [PATCH v3 8/8] mm: Update DMA zones description Nicolas Saenz Julienne
2020-10-15 5:40 ` Christoph Hellwig
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