From: Christoph Hellwig <hch@lst.de>
To: iommu@lists.linux-foundation.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Jon Mason <jdmason@kudzu.us>, Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
x86@kernel.org, linux-alpha@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org,
linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 17/23] iommu: remove the mapping_error dma_map_ops method
Date: Fri, 30 Nov 2018 14:22:25 +0100 [thread overview]
Message-ID: <20181130132231.16512-18-hch@lst.de> (raw)
In-Reply-To: <20181130132231.16512-1-hch@lst.de>
Return DMA_MAPPING_ERROR instead of 0 on a dma mapping failure and let
the core dma-mapping code handle the rest.
Note that the existing code used AMD_IOMMU_MAPPING_ERROR to check from
a 0 return from the IOVA allocator, which is replaced with an explicit
0 as in the implementation and other users of that interface.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/iommu/amd_iommu.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 1167ff0416cf..c5d6c7c42b0a 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -55,8 +55,6 @@
#include "amd_iommu_types.h"
#include "irq_remapping.h"
-#define AMD_IOMMU_MAPPING_ERROR 0
-
#define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28))
#define LOOP_TIMEOUT 100000
@@ -2339,7 +2337,7 @@ static dma_addr_t __map_single(struct device *dev,
paddr &= PAGE_MASK;
address = dma_ops_alloc_iova(dev, dma_dom, pages, dma_mask);
- if (address == AMD_IOMMU_MAPPING_ERROR)
+ if (!address)
goto out;
prot = dir2prot(direction);
@@ -2376,7 +2374,7 @@ static dma_addr_t __map_single(struct device *dev,
dma_ops_free_iova(dma_dom, address, pages);
- return AMD_IOMMU_MAPPING_ERROR;
+ return DMA_MAPPING_ERROR;
}
/*
@@ -2427,7 +2425,7 @@ static dma_addr_t map_page(struct device *dev, struct page *page,
if (PTR_ERR(domain) == -EINVAL)
return (dma_addr_t)paddr;
else if (IS_ERR(domain))
- return AMD_IOMMU_MAPPING_ERROR;
+ return DMA_MAPPING_ERROR;
dma_mask = *dev->dma_mask;
dma_dom = to_dma_ops_domain(domain);
@@ -2504,7 +2502,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
npages = sg_num_pages(dev, sglist, nelems);
address = dma_ops_alloc_iova(dev, dma_dom, npages, dma_mask);
- if (address == AMD_IOMMU_MAPPING_ERROR)
+ if (address == DMA_MAPPING_ERROR)
goto out_err;
prot = dir2prot(direction);
@@ -2627,7 +2625,7 @@ static void *alloc_coherent(struct device *dev, size_t size,
*dma_addr = __map_single(dev, dma_dom, page_to_phys(page),
size, DMA_BIDIRECTIONAL, dma_mask);
- if (*dma_addr == AMD_IOMMU_MAPPING_ERROR)
+ if (*dma_addr == DMA_MAPPING_ERROR)
goto out_free;
return page_address(page);
@@ -2678,11 +2676,6 @@ static int amd_iommu_dma_supported(struct device *dev, u64 mask)
return check_device(dev);
}
-static int amd_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
- return dma_addr == AMD_IOMMU_MAPPING_ERROR;
-}
-
static const struct dma_map_ops amd_iommu_dma_ops = {
.alloc = alloc_coherent,
.free = free_coherent,
@@ -2691,7 +2684,6 @@ static const struct dma_map_ops amd_iommu_dma_ops = {
.map_sg = map_sg,
.unmap_sg = unmap_sg,
.dma_supported = amd_iommu_dma_supported,
- .mapping_error = amd_iommu_mapping_error,
};
static int init_reserved_iova_ranges(void)
--
2.19.1
next prev parent reply other threads:[~2018-11-30 13:24 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-30 13:22 remove the ->mapping_error method from dma_map_ops V3 Christoph Hellwig
2018-11-30 13:22 ` [PATCH 01/23] dma-mapping: provide a generic DMA_MAPPING_ERROR Christoph Hellwig
2018-12-04 16:41 ` Robin Murphy
2018-12-04 22:33 ` Christoph Hellwig
2018-11-30 13:22 ` [PATCH 02/23] dma-direct: remove the mapping_error dma_map_ops method Christoph Hellwig
2018-11-30 13:22 ` [PATCH 03/23] arm: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 04/23] powerpc/iommu: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 05/23] mips/jazz: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 06/23] s390: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 07/23] sparc: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 08/23] parisc/ccio: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 09/23] parisc/sba_iommu: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 10/23] arm64: remove the dummy_dma_ops mapping_error method Christoph Hellwig
2018-11-30 13:22 ` [PATCH 11/23] alpha: remove the mapping_error dma_map_ops method Christoph Hellwig
2018-11-30 13:22 ` [PATCH 12/23] ia64/sba_iommu: improve internal map_page users Christoph Hellwig
2018-11-30 13:22 ` [PATCH 13/23] ia64/sba_iommu: remove the mapping_error dma_map_ops method Christoph Hellwig
2018-11-30 13:22 ` [PATCH 14/23] ia64/sn: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 15/23] x86/amd_gart: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 16/23] x86/calgary: " Christoph Hellwig
2018-11-30 13:22 ` Christoph Hellwig [this message]
2018-11-30 13:22 ` [PATCH 18/23] iommu/intel: small map_page cleanup Christoph Hellwig
2018-11-30 13:22 ` [PATCH 19/23] iommu/vt-d: remove the mapping_error dma_map_ops method Christoph Hellwig
2018-11-30 13:22 ` [PATCH 20/23] iommu/dma-iommu: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 21/23] xen-swiotlb: " Christoph Hellwig
2018-12-02 12:42 ` Konrad Rzeszutek Wilk
2018-11-30 13:22 ` [PATCH 22/23] dma-mapping: " Christoph Hellwig
2018-11-30 13:22 ` [PATCH 23/23] dma-mapping: return an error code from dma_mapping_error Christoph Hellwig
2018-11-30 18:59 ` remove the ->mapping_error method from dma_map_ops V3 Russell King - ARM Linux
2018-11-30 19:43 ` Linus Torvalds
2018-12-03 17:27 ` Christoph Hellwig
2018-12-06 14:57 ` Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181130132231.16512-18-hch@lst.de \
--to=hch@lst.de \
--cc=dwmw2@infradead.org \
--cc=iommu@lists.linux-foundation.org \
--cc=jdmason@kudzu.us \
--cc=joro@8bytes.org \
--cc=linux-alpha@vger.kernel.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-ia64@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-parisc@vger.kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=robin.murphy@arm.com \
--cc=torvalds@linux-foundation.org \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xenproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).