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Groups > linux.kernel > #1667984
| From | Christoph Hellwig <hch@lst.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 21/44] powerpc: implement ->mapping_error |
| Date | 2017-06-16 20:30 +0200 |
| Message-ID | <tT4am-3MU-5@gated-at.bofh.it> (permalink) |
| References | <tT40F-3II-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
DMA_ERROR_CODE is going to go away, so don't rely on it. Instead
define a ->mapping_error method for all IOMMU based dma operation
instances. The direct ops don't ever return an error and don't
need a ->mapping_error method.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/include/asm/dma-mapping.h | 4 ----
arch/powerpc/include/asm/iommu.h | 4 ++++
arch/powerpc/kernel/dma-iommu.c | 6 ++++++
arch/powerpc/kernel/iommu.c | 28 ++++++++++++++--------------
arch/powerpc/platforms/cell/iommu.c | 1 +
arch/powerpc/platforms/pseries/vio.c | 3 ++-
6 files changed, 27 insertions(+), 19 deletions(-)
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index 181a095468e4..73aedbe6c977 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -17,10 +17,6 @@
#include <asm/io.h>
#include <asm/swiotlb.h>
-#ifdef CONFIG_PPC64
-#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
-#endif
-
/* Some dma direct funcs must be visible for use in other dma_ops */
extern void *__dma_direct_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag,
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 8a8ce220d7d0..20febe0b7f32 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -139,6 +139,8 @@ struct scatterlist;
#ifdef CONFIG_PPC64
+#define IOMMU_MAPPING_ERROR (~(dma_addr_t)0x0)
+
static inline void set_iommu_table_base(struct device *dev,
struct iommu_table *base)
{
@@ -238,6 +240,8 @@ static inline int __init tce_iommu_bus_notifier_init(void)
}
#endif /* !CONFIG_IOMMU_API */
+int dma_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr);
+
#else
static inline void *get_iommu_table_base(struct device *dev)
diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c
index fb7cbaa37658..8f7abf9baa63 100644
--- a/arch/powerpc/kernel/dma-iommu.c
+++ b/arch/powerpc/kernel/dma-iommu.c
@@ -105,6 +105,11 @@ static u64 dma_iommu_get_required_mask(struct device *dev)
return mask;
}
+int dma_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return dma_addr == IOMMU_MAPPING_ERROR;
+}
+
struct dma_map_ops dma_iommu_ops = {
.alloc = dma_iommu_alloc_coherent,
.free = dma_iommu_free_coherent,
@@ -115,5 +120,6 @@ struct dma_map_ops dma_iommu_ops = {
.map_page = dma_iommu_map_page,
.unmap_page = dma_iommu_unmap_page,
.get_required_mask = dma_iommu_get_required_mask,
+ .mapping_error = dma_iommu_mapping_error,
};
EXPORT_SYMBOL(dma_iommu_ops);
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index f2b724cd9e64..233ca3fe4754 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -198,11 +198,11 @@ static unsigned long iommu_range_alloc(struct device *dev,
if (unlikely(npages == 0)) {
if (printk_ratelimit())
WARN_ON(1);
- return DMA_ERROR_CODE;
+ return IOMMU_MAPPING_ERROR;
}
if (should_fail_iommu(dev))
- return DMA_ERROR_CODE;
+ return IOMMU_MAPPING_ERROR;
/*
* We don't need to disable preemption here because any CPU can
@@ -278,7 +278,7 @@ static unsigned long iommu_range_alloc(struct device *dev,
} else {
/* Give up */
spin_unlock_irqrestore(&(pool->lock), flags);
- return DMA_ERROR_CODE;
+ return IOMMU_MAPPING_ERROR;
}
}
@@ -310,13 +310,13 @@ static dma_addr_t iommu_alloc(struct device *dev, struct iommu_table *tbl,
unsigned long attrs)
{
unsigned long entry;
- dma_addr_t ret = DMA_ERROR_CODE;
+ dma_addr_t ret = IOMMU_MAPPING_ERROR;
int build_fail;
entry = iommu_range_alloc(dev, tbl, npages, NULL, mask, align_order);
- if (unlikely(entry == DMA_ERROR_CODE))
- return DMA_ERROR_CODE;
+ if (unlikely(entry == IOMMU_MAPPING_ERROR))
+ return IOMMU_MAPPING_ERROR;
entry += tbl->it_offset; /* Offset into real TCE table */
ret = entry << tbl->it_page_shift; /* Set the return dma address */
@@ -328,12 +328,12 @@ static dma_addr_t iommu_alloc(struct device *dev, struct iommu_table *tbl,
/* tbl->it_ops->set() only returns non-zero for transient errors.
* Clean up the table bitmap in this case and return
- * DMA_ERROR_CODE. For all other errors the functionality is
+ * IOMMU_MAPPING_ERROR. For all other errors the functionality is
* not altered.
*/
if (unlikely(build_fail)) {
__iommu_free(tbl, ret, npages);
- return DMA_ERROR_CODE;
+ return IOMMU_MAPPING_ERROR;
}
/* Flush/invalidate TLB caches if necessary */
@@ -478,7 +478,7 @@ int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl,
DBG(" - vaddr: %lx, size: %lx\n", vaddr, slen);
/* Handle failure */
- if (unlikely(entry == DMA_ERROR_CODE)) {
+ if (unlikely(entry == IOMMU_MAPPING_ERROR)) {
if (!(attrs & DMA_ATTR_NO_WARN) &&
printk_ratelimit())
dev_info(dev, "iommu_alloc failed, tbl %p "
@@ -545,7 +545,7 @@ int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl,
*/
if (outcount < incount) {
outs = sg_next(outs);
- outs->dma_address = DMA_ERROR_CODE;
+ outs->dma_address = IOMMU_MAPPING_ERROR;
outs->dma_length = 0;
}
@@ -563,7 +563,7 @@ int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl,
npages = iommu_num_pages(s->dma_address, s->dma_length,
IOMMU_PAGE_SIZE(tbl));
__iommu_free(tbl, vaddr, npages);
- s->dma_address = DMA_ERROR_CODE;
+ s->dma_address = IOMMU_MAPPING_ERROR;
s->dma_length = 0;
}
if (s == outs)
@@ -777,7 +777,7 @@ dma_addr_t iommu_map_page(struct device *dev, struct iommu_table *tbl,
unsigned long mask, enum dma_data_direction direction,
unsigned long attrs)
{
- dma_addr_t dma_handle = DMA_ERROR_CODE;
+ dma_addr_t dma_handle = IOMMU_MAPPING_ERROR;
void *vaddr;
unsigned long uaddr;
unsigned int npages, align;
@@ -797,7 +797,7 @@ dma_addr_t iommu_map_page(struct device *dev, struct iommu_table *tbl,
dma_handle = iommu_alloc(dev, tbl, vaddr, npages, direction,
mask >> tbl->it_page_shift, align,
attrs);
- if (dma_handle == DMA_ERROR_CODE) {
+ if (dma_handle == IOMMU_MAPPING_ERROR) {
if (!(attrs & DMA_ATTR_NO_WARN) &&
printk_ratelimit()) {
dev_info(dev, "iommu_alloc failed, tbl %p "
@@ -869,7 +869,7 @@ void *iommu_alloc_coherent(struct device *dev, struct iommu_table *tbl,
io_order = get_iommu_order(size, tbl);
mapping = iommu_alloc(dev, tbl, ret, nio_pages, DMA_BIDIRECTIONAL,
mask >> tbl->it_page_shift, io_order, 0);
- if (mapping == DMA_ERROR_CODE) {
+ if (mapping == IOMMU_MAPPING_ERROR) {
free_pages((unsigned long)ret, order);
return NULL;
}
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index 71b995bbcae0..948086e33a0c 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -660,6 +660,7 @@ static const struct dma_map_ops dma_iommu_fixed_ops = {
.set_dma_mask = dma_set_mask_and_switch,
.map_page = dma_fixed_map_page,
.unmap_page = dma_fixed_unmap_page,
+ .mapping_error = dma_iommu_mapping_error,
};
static void cell_dma_dev_setup_fixed(struct device *dev);
diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
index 28b09fd797ec..e6f43d546827 100644
--- a/arch/powerpc/platforms/pseries/vio.c
+++ b/arch/powerpc/platforms/pseries/vio.c
@@ -519,7 +519,7 @@ static dma_addr_t vio_dma_iommu_map_page(struct device *dev, struct page *page,
{
struct vio_dev *viodev = to_vio_dev(dev);
struct iommu_table *tbl;
- dma_addr_t ret = DMA_ERROR_CODE;
+ dma_addr_t ret = IOMMU_MAPPING_ERROR;
tbl = get_iommu_table_base(dev);
if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl)))) {
@@ -625,6 +625,7 @@ static const struct dma_map_ops vio_dma_mapping_ops = {
.unmap_page = vio_dma_iommu_unmap_page,
.dma_supported = vio_dma_iommu_dma_supported,
.get_required_mask = vio_dma_get_required_mask,
+ .mapping_error = dma_iommu_mapping_error,
};
/**
--
2.11.0
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clean up and modularize arch dma_mapping interface V2 Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 44/44] powerpc: merge __dma_set_mask into dma_set_mask Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 38/44] arm: implement ->dma_supported instead of ->set_dma_mask Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 36/44] dma-mapping: remove HAVE_ARCH_DMA_SUPPORTED Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 42/44] powerpc/cell: use the dma_supported method for ops switching Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
Re: [PATCH 42/44] powerpc/cell: use the dma_supported method for ops switching Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2017-06-17 23:00 +0200
Re: [PATCH 42/44] powerpc/cell: use the dma_supported method for ops switching Christoph Hellwig <hch@infradead.org> - 2017-06-18 09:20 +0200
Re: [PATCH 42/44] powerpc/cell: use the dma_supported method for ops switching Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2017-06-18 12:00 +0200
[PATCH 27/44] sparc: remove leon_dma_ops Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 31/44] hexagon: remove arch-specific dma_supported implementation Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 34/44] arm: remove arch specific dma_supported implementation Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 29/44] dma-noop: remove dma_supported and mapping_error methods Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 40/44] tile: remove dma_supported and mapping_error methods Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 41/44] powerpc/cell: clean up fixed mapping dma_ops initialization Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 33/44] openrisc: remove arch-specific dma_supported implementation Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 39/44] xen-swiotlb: remove xen_swiotlb_set_dma_mask Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 17/44] hexagon: switch to use ->mapping_error for error reporting Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 35/44] x86: remove arch specific dma_supported implementation Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 32/44] hexagon: remove the unused dma_is_consistent prototype Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 13/44] openrisc: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 37/44] mips/loongson64: implement ->dma_supported instead of ->set_dma_mask Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 15/44] xtensa: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 24/44] x86: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 28/44] sparc: remove arch specific dma_supported implementations Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 02/44] ibmveth: properly unwind on init errors Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 01/44] firmware/ivc: use dma_mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 43/44] dma-mapping: remove the set_dma_mask method Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 30/44] dma-virt: remove dma_supported and mapping_error methods Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
[PATCH 26/44] dma-mapping: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 16/44] arm64: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 21/44] powerpc: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 14/44] sh: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 19/44] s390: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 25/44] arm: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 23/44] x86/calgary: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 06/44] iommu/dma: don't rely on DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
Re: [PATCH 06/44] iommu/dma: don't rely on DMA_ERROR_CODE Robin Murphy <robin.murphy@arm.com> - 2017-06-19 17:20 +0200
[PATCH 18/44] iommu/amd: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 20/44] sparc: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 10/44] ia64: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 08/44] xen-swiotlb: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
Re: [PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE Alexander Duyck <alexander.duyck@gmail.com> - 2017-06-16 22:50 +0200
Re: [PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE Christoph Hellwig <hch@infradead.org> - 2017-06-18 09:10 +0200
[PATCH 04/44] drm/exynos: don't use DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 09/44] c6x: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 07/44] xen-swiotlb: consolidate xen_swiotlb_dma_ops Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 11/44] m32r: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 22/44] x86/pci-nommu: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 12/44] microblaze: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
[PATCH 05/44] drm/armada: don't abuse DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
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