From: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org, ralf@linux-mips.org,
linux-kernel@vger.kernel.org
Cc: David Daney <ddaney@caviumnetworks.com>
Subject: [PATCH 2/9] MIPS: Allow MAX_DMA32_PFN to be overridden.
Date: Thu, 23 Sep 2010 15:38:09 -0700 [thread overview]
Message-ID: <1285281496-24696-3-git-send-email-ddaney@caviumnetworks.com> (raw)
In-Reply-To: <1285281496-24696-1-git-send-email-ddaney@caviumnetworks.com>
DMA mapping may reduce the usable physical address range usable for
32-bit DMA.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
---
arch/mips/include/asm/dma.h | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/mips/include/asm/dma.h b/arch/mips/include/asm/dma.h
index 1353c81..2d47da6 100644
--- a/arch/mips/include/asm/dma.h
+++ b/arch/mips/include/asm/dma.h
@@ -91,7 +91,10 @@
#define MAX_DMA_ADDRESS (PAGE_OFFSET + 0x01000000)
#endif
#define MAX_DMA_PFN PFN_DOWN(virt_to_phys((void *)MAX_DMA_ADDRESS))
+
+#ifndef MAX_DMA32_PFN
#define MAX_DMA32_PFN (1UL << (32 - PAGE_SHIFT))
+#endif
/* 8237 DMA controllers */
#define IO_DMA1_BASE 0x00 /* 8 bit slave DMA, channels 0..3 */
--
1.7.2.2
next prev parent reply other threads:[~2010-09-23 22:39 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 22:38 [PATCH 0/9] MIPS: Use dma-mapping-common.h and use swiotlb for Octeon David Daney
2010-09-23 22:38 ` [PATCH 1/9] MIPS: Octeon: Set dma_masks for octeon_mgmt device David Daney
2010-09-23 22:38 ` David Daney [this message]
2010-09-23 22:38 ` [PATCH 3/9] MIPS: Octeon: Adjust top of DMA32 zone David Daney
2010-09-23 22:38 ` [PATCH 4/9] MIPS: Octeon: Select ZONE_DMA32 David Daney
2010-09-23 22:38 ` [PATCH 5/9] MIPS: Convert DMA to use dma-mapping-common.h David Daney
2010-09-24 1:03 ` [PATCH] MIPS: Remove plat_map_dma_mem_page() David Daney
2010-09-27 5:30 ` [PATCH 5/9] MIPS: Convert DMA to use dma-mapping-common.h FUJITA Tomonori
2010-09-27 17:35 ` David Daney
2010-09-28 0:12 ` FUJITA Tomonori
2010-09-23 22:38 ` [PATCH 8/9] MIPS: Add a platform hook for swiotlb setup David Daney
2010-09-24 16:08 ` Sergei Shtylyov
2010-09-24 16:13 ` David Daney
2010-09-24 16:32 ` Ralf Baechle
2010-09-23 22:38 ` [PATCH 9/9] MIPS: Octeon: Rewrite DMA mapping functions David Daney
2010-09-24 1:06 ` [PATCH] MIPS: Octeon: Remove plat_map_dma_mem_page() David Daney
2010-09-23 22:47 ` [PATCH 6/9] swiotlb: Declare swiotlb_init_with_default_size() David Daney
2010-09-27 16:53 ` Konrad Rzeszutek Wilk
2010-09-23 22:47 ` [PATCH 7/9] swiotlb: Make bounce buffer bounds non-static David Daney
2010-09-27 5:20 ` FUJITA Tomonori
2010-09-27 17:39 ` David Daney
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