From: Magnus Damm <magnus.damm@gmail.com>
To: linux-renesas-soc@vger.kernel.org
Cc: horms+renesas@verge.net.au,Magnus Damm
<magnus.damm@gmail.com>,laurent.pinchart+renesas@ideasonboard.com,geert+renesas@glider.be
Subject: [PATCH/RFC 01/02] iommu/ipmmu-vmsa: Use 64-bit masks
Date: Mon, 18 Jan 2016 14:48:26 +0900 [thread overview]
Message-ID: <20160118054826.22156.70507.sendpatchset@little-apple> (raw)
In-Reply-To: <20160118054817.22156.6531.sendpatchset@little-apple>
From: Magnus Damm <damm+renesas@opensource.se>
The IPMMU hardware is able to use page tables from anywhere
in the memory, so set masks to 64-bits. Required to be able
to use the IPMMU driver with 4 GiB of memory. Without this
patch with 4 GiB enabled the following error message is spit
out on the console during boot:
ipmmu-vmsa e67b0000.mmu: Cannot accommodate DMA translation
for IOMMU page tables
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
---
drivers/iommu/ipmmu-vmsa.c | 2 ++
1 file changed, 2 insertions(+)
--- 0001/drivers/iommu/ipmmu-vmsa.c
+++ work/drivers/iommu/ipmmu-vmsa.c 2016-01-18 14:22:22.730513000 +0900
@@ -1043,6 +1043,8 @@ static int ipmmu_probe(struct platform_d
return -ENOMEM;
}
+ dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+
mmu->dev = &pdev->dev;
mmu->num_utlbs = 32;
bitmap_zero(mmu->ctx, IPMMU_CTX_MAX);
next prev parent reply other threads:[~2016-01-18 5:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-18 5:48 [PATCH/RFC 00/02] ARM: shmobile: r8a7795 Salvator-X IPMMU 4 GiB RAM test code Magnus Damm
2016-01-18 5:48 ` Magnus Damm [this message]
2016-01-18 5:48 ` [PATCH/RFC 02/02] arm64: dts: Salvator-X: Enable 4 GiB of RAM Magnus Damm
2017-02-17 8:56 ` Geert Uytterhoeven
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