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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-07 05:20:54 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-07 05:20:54 +0300
commitf72e24a1240b78f421649c4d88f5c24ab1c896a1 (patch)
tree90bed3bf33ae0abf5636dafcc3eda3cc354612b0 /arch/sparc
parent2c669275dc3245e2866a0eea15bda8ec8d1ab8db (diff)
parent1655cf8829d82d367d8fdb5cb58e5885d7d2a391 (diff)
downloadlinux-f72e24a1240b78f421649c4d88f5c24ab1c896a1.tar.xz
Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping infrastructure from Christoph Hellwig: "This is the first pull request for the new dma-mapping subsystem In this new subsystem we'll try to properly maintain all the generic code related to dma-mapping, and will further consolidate arch code into common helpers. This pull request contains: - removal of the DMA_ERROR_CODE macro, replacing it with calls to ->mapping_error so that the dma_map_ops instances are more self contained and can be shared across architectures (me) - removal of the ->set_dma_mask method, which duplicates the ->dma_capable one in terms of functionality, but requires more duplicate code. - various updates for the coherent dma pool and related arm code (Vladimir) - various smaller cleanups (me)" * tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping: (56 commits) ARM: dma-mapping: Remove traces of NOMMU code ARM: NOMMU: Set ARM_DMA_MEM_BUFFERABLE for M-class cpus ARM: NOMMU: Introduce dma operations for noMMU drivers: dma-mapping: allow dma_common_mmap() for NOMMU drivers: dma-coherent: Introduce default DMA pool drivers: dma-coherent: Account dma_pfn_offset when used with device tree dma: Take into account dma_pfn_offset dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs dma-mapping: remove dmam_free_noncoherent crypto: qat - avoid an uninitialized variable warning au1100fb: remove a bogus dma_free_nonconsistent call MAINTAINERS: add entry for dma mapping helpers powerpc: merge __dma_set_mask into dma_set_mask dma-mapping: remove the set_dma_mask method powerpc/cell: use the dma_supported method for ops switching powerpc/cell: clean up fixed mapping dma_ops initialization tile: remove dma_supported and mapping_error methods xen-swiotlb: remove xen_swiotlb_set_dma_mask arm: implement ->dma_supported instead of ->set_dma_mask mips/loongson64: implement ->dma_supported instead of ->set_dma_mask ...
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/include/asm/dma-mapping.h8
-rw-r--r--arch/sparc/kernel/iommu.c52
-rw-r--r--arch/sparc/kernel/iommu_common.h2
-rw-r--r--arch/sparc/kernel/ioport.c27
-rw-r--r--arch/sparc/kernel/pci_sun4v.c31
5 files changed, 62 insertions, 58 deletions
diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index 69cc627779f2..60bf1633d554 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -5,11 +5,6 @@
#include <linux/mm.h>
#include <linux/dma-debug.h>
-#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
-
-#define HAVE_ARCH_DMA_SUPPORTED 1
-int dma_supported(struct device *dev, u64 mask);
-
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir)
{
@@ -19,7 +14,6 @@ static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
}
extern const struct dma_map_ops *dma_ops;
-extern const struct dma_map_ops *leon_dma_ops;
extern const struct dma_map_ops pci32_dma_ops;
extern struct bus_type pci_bus_type;
@@ -28,7 +22,7 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
#ifdef CONFIG_SPARC_LEON
if (sparc_cpu_model == sparc_leon)
- return leon_dma_ops;
+ return &pci32_dma_ops;
#endif
#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
if (bus == &pci_bus_type)
diff --git a/arch/sparc/kernel/iommu.c b/arch/sparc/kernel/iommu.c
index c63ba99ca551..fcbcc031f615 100644
--- a/arch/sparc/kernel/iommu.c
+++ b/arch/sparc/kernel/iommu.c
@@ -314,7 +314,7 @@ bad:
bad_no_ctx:
if (printk_ratelimit())
WARN_ON(1);
- return DMA_ERROR_CODE;
+ return SPARC_MAPPING_ERROR;
}
static void strbuf_flush(struct strbuf *strbuf, struct iommu *iommu,
@@ -547,7 +547,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
if (outcount < incount) {
outs = sg_next(outs);
- outs->dma_address = DMA_ERROR_CODE;
+ outs->dma_address = SPARC_MAPPING_ERROR;
outs->dma_length = 0;
}
@@ -573,7 +573,7 @@ iommu_map_failed:
iommu_tbl_range_free(&iommu->tbl, vaddr, npages,
IOMMU_ERROR_CODE);
- s->dma_address = DMA_ERROR_CODE;
+ s->dma_address = SPARC_MAPPING_ERROR;
s->dma_length = 0;
}
if (s == outs)
@@ -741,6 +741,26 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev,
spin_unlock_irqrestore(&iommu->lock, flags);
}
+static int dma_4u_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return dma_addr == SPARC_MAPPING_ERROR;
+}
+
+static int dma_4u_supported(struct device *dev, u64 device_mask)
+{
+ struct iommu *iommu = dev->archdata.iommu;
+
+ if (device_mask > DMA_BIT_MASK(32))
+ return 0;
+ if ((device_mask & iommu->dma_addr_mask) == iommu->dma_addr_mask)
+ return 1;
+#ifdef CONFIG_PCI
+ if (dev_is_pci(dev))
+ return pci64_dma_supported(to_pci_dev(dev), device_mask);
+#endif
+ return 0;
+}
+
static const struct dma_map_ops sun4u_dma_ops = {
.alloc = dma_4u_alloc_coherent,
.free = dma_4u_free_coherent,
@@ -750,31 +770,9 @@ static const struct dma_map_ops sun4u_dma_ops = {
.unmap_sg = dma_4u_unmap_sg,
.sync_single_for_cpu = dma_4u_sync_single_for_cpu,
.sync_sg_for_cpu = dma_4u_sync_sg_for_cpu,
+ .dma_supported = dma_4u_supported,
+ .mapping_error = dma_4u_mapping_error,
};
const struct dma_map_ops *dma_ops = &sun4u_dma_ops;
EXPORT_SYMBOL(dma_ops);
-
-int dma_supported(struct device *dev, u64 device_mask)
-{
- struct iommu *iommu = dev->archdata.iommu;
- u64 dma_addr_mask = iommu->dma_addr_mask;
-
- if (device_mask > DMA_BIT_MASK(32)) {
- if (iommu->atu)
- dma_addr_mask = iommu->atu->dma_addr_mask;
- else
- return 0;
- }
-
- if ((device_mask & dma_addr_mask) == dma_addr_mask)
- return 1;
-
-#ifdef CONFIG_PCI
- if (dev_is_pci(dev))
- return pci64_dma_supported(to_pci_dev(dev), device_mask);
-#endif
-
- return 0;
-}
-EXPORT_SYMBOL(dma_supported);
diff --git a/arch/sparc/kernel/iommu_common.h b/arch/sparc/kernel/iommu_common.h
index 828493329f68..5ea5c192b1d9 100644
--- a/arch/sparc/kernel/iommu_common.h
+++ b/arch/sparc/kernel/iommu_common.h
@@ -47,4 +47,6 @@ static inline int is_span_boundary(unsigned long entry,
return iommu_is_span_boundary(entry, nr, shift, boundary_size);
}
+#define SPARC_MAPPING_ERROR (~(dma_addr_t)0x0)
+
#endif /* _IOMMU_COMMON_H */
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index cf20033a1458..12894f259bea 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -401,6 +401,11 @@ static void sbus_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
BUG();
}
+static int sbus_dma_supported(struct device *dev, u64 mask)
+{
+ return 0;
+}
+
static const struct dma_map_ops sbus_dma_ops = {
.alloc = sbus_alloc_coherent,
.free = sbus_free_coherent,
@@ -410,6 +415,7 @@ static const struct dma_map_ops sbus_dma_ops = {
.unmap_sg = sbus_unmap_sg,
.sync_sg_for_cpu = sbus_sync_sg_for_cpu,
.sync_sg_for_device = sbus_sync_sg_for_device,
+ .dma_supported = sbus_dma_supported,
};
static int __init sparc_register_ioport(void)
@@ -637,6 +643,7 @@ static void pci32_sync_sg_for_device(struct device *device, struct scatterlist *
}
}
+/* note: leon re-uses pci32_dma_ops */
const struct dma_map_ops pci32_dma_ops = {
.alloc = pci32_alloc_coherent,
.free = pci32_free_coherent,
@@ -651,29 +658,9 @@ const struct dma_map_ops pci32_dma_ops = {
};
EXPORT_SYMBOL(pci32_dma_ops);
-/* leon re-uses pci32_dma_ops */
-const struct dma_map_ops *leon_dma_ops = &pci32_dma_ops;
-EXPORT_SYMBOL(leon_dma_ops);
-
const struct dma_map_ops *dma_ops = &sbus_dma_ops;
EXPORT_SYMBOL(dma_ops);
-
-/*
- * Return whether the given PCI device DMA address mask can be
- * supported properly. For example, if your device can only drive the
- * low 24-bits during PCI bus mastering, then you would pass
- * 0x00ffffff as the mask to this function.
- */
-int dma_supported(struct device *dev, u64 mask)
-{
- if (dev_is_pci(dev))
- return 1;
-
- return 0;
-}
-EXPORT_SYMBOL(dma_supported);
-
#ifdef CONFIG_PROC_FS
static int sparc_io_proc_show(struct seq_file *m, void *v)
diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c
index 68bec7c97cb8..24f21c726dfa 100644
--- a/arch/sparc/kernel/pci_sun4v.c
+++ b/arch/sparc/kernel/pci_sun4v.c
@@ -24,6 +24,7 @@
#include "pci_impl.h"
#include "iommu_common.h"
+#include "kernel.h"
#include "pci_sun4v.h"
@@ -412,12 +413,12 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page,
bad:
if (printk_ratelimit())
WARN_ON(1);
- return DMA_ERROR_CODE;
+ return SPARC_MAPPING_ERROR;
iommu_map_fail:
local_irq_restore(flags);
iommu_tbl_range_free(tbl, bus_addr, npages, IOMMU_ERROR_CODE);
- return DMA_ERROR_CODE;
+ return SPARC_MAPPING_ERROR;
}
static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr,
@@ -590,7 +591,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
if (outcount < incount) {
outs = sg_next(outs);
- outs->dma_address = DMA_ERROR_CODE;
+ outs->dma_address = SPARC_MAPPING_ERROR;
outs->dma_length = 0;
}
@@ -607,7 +608,7 @@ iommu_map_failed:
iommu_tbl_range_free(tbl, vaddr, npages,
IOMMU_ERROR_CODE);
/* XXX demap? XXX */
- s->dma_address = DMA_ERROR_CODE;
+ s->dma_address = SPARC_MAPPING_ERROR;
s->dma_length = 0;
}
if (s == outs)
@@ -669,6 +670,26 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
local_irq_restore(flags);
}
+static int dma_4v_supported(struct device *dev, u64 device_mask)
+{
+ struct iommu *iommu = dev->archdata.iommu;
+ u64 dma_addr_mask;
+
+ if (device_mask > DMA_BIT_MASK(32) && iommu->atu)
+ dma_addr_mask = iommu->atu->dma_addr_mask;
+ else
+ dma_addr_mask = iommu->dma_addr_mask;
+
+ if ((device_mask & dma_addr_mask) == dma_addr_mask)
+ return 1;
+ return pci64_dma_supported(to_pci_dev(dev), device_mask);
+}
+
+static int dma_4v_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return dma_addr == SPARC_MAPPING_ERROR;
+}
+
static const struct dma_map_ops sun4v_dma_ops = {
.alloc = dma_4v_alloc_coherent,
.free = dma_4v_free_coherent,
@@ -676,6 +697,8 @@ static const struct dma_map_ops sun4v_dma_ops = {
.unmap_page = dma_4v_unmap_page,
.map_sg = dma_4v_map_sg,
.unmap_sg = dma_4v_unmap_sg,
+ .dma_supported = dma_4v_supported,
+ .mapping_error = dma_4v_mapping_error,
};
static void pci_sun4v_scan_bus(struct pci_pbm_info *pbm, struct device *parent)