summaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-04-12 18:25:16 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-04-12 18:25:16 +0300
commit8ee15f3248660f85102a47410079d408615723d4 (patch)
tree96e57bb60585f81f2bc99bf112aed8e782d12f08 /arch
parent4876191cbe2a4702b0067d4156e1d8648ac36801 (diff)
parent8c5165430c0194df92369162d1c7f53f8672baa5 (diff)
downloadlinux-8ee15f3248660f85102a47410079d408615723d4.tar.xz
Merge tag 'dma-mapping-5.1-1' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig: "Fix a sparc64 sun4v_pci regression introduced in this merged window, and a dma-debug stracktrace regression from the big refactor last merge window" * tag 'dma-mapping-5.1-1' of git://git.infradead.org/users/hch/dma-mapping: dma-debug: only skip one stackframe entry sparc64/pci_sun4v: fix ATU checks for large DMA masks
Diffstat (limited to 'arch')
-rw-r--r--arch/sparc/kernel/pci_sun4v.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c
index a8af6023c126..14b93c5564e3 100644
--- a/arch/sparc/kernel/pci_sun4v.c
+++ b/arch/sparc/kernel/pci_sun4v.c
@@ -73,6 +73,11 @@ static inline void iommu_batch_start(struct device *dev, unsigned long prot, uns
p->npages = 0;
}
+static inline bool iommu_use_atu(struct iommu *iommu, u64 mask)
+{
+ return iommu->atu && mask > DMA_BIT_MASK(32);
+}
+
/* Interrupts must be disabled. */
static long iommu_batch_flush(struct iommu_batch *p, u64 mask)
{
@@ -92,7 +97,7 @@ static long iommu_batch_flush(struct iommu_batch *p, u64 mask)
prot &= (HV_PCI_MAP_ATTR_READ | HV_PCI_MAP_ATTR_WRITE);
while (npages != 0) {
- if (mask <= DMA_BIT_MASK(32) || !pbm->iommu->atu) {
+ if (!iommu_use_atu(pbm->iommu, mask)) {
num = pci_sun4v_iommu_map(devhandle,
HV_PCI_TSBID(0, entry),
npages,
@@ -179,7 +184,6 @@ static void *dma_4v_alloc_coherent(struct device *dev, size_t size,
unsigned long flags, order, first_page, npages, n;
unsigned long prot = 0;
struct iommu *iommu;
- struct atu *atu;
struct iommu_map_table *tbl;
struct page *page;
void *ret;
@@ -205,13 +209,11 @@ static void *dma_4v_alloc_coherent(struct device *dev, size_t size,
memset((char *)first_page, 0, PAGE_SIZE << order);
iommu = dev->archdata.iommu;
- atu = iommu->atu;
-
mask = dev->coherent_dma_mask;
- if (mask <= DMA_BIT_MASK(32) || !atu)
+ if (!iommu_use_atu(iommu, mask))
tbl = &iommu->tbl;
else
- tbl = &atu->tbl;
+ tbl = &iommu->atu->tbl;
entry = iommu_tbl_range_alloc(dev, tbl, npages, NULL,
(unsigned long)(-1), 0);
@@ -333,7 +335,7 @@ static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu,
atu = iommu->atu;
devhandle = pbm->devhandle;
- if (dvma <= DMA_BIT_MASK(32)) {
+ if (!iommu_use_atu(iommu, dvma)) {
tbl = &iommu->tbl;
iotsb_num = 0; /* we don't care for legacy iommu */
} else {
@@ -374,7 +376,7 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page,
npages >>= IO_PAGE_SHIFT;
mask = *dev->dma_mask;
- if (mask <= DMA_BIT_MASK(32))
+ if (!iommu_use_atu(iommu, mask))
tbl = &iommu->tbl;
else
tbl = &atu->tbl;
@@ -510,7 +512,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
IO_PAGE_SIZE) >> IO_PAGE_SHIFT;
mask = *dev->dma_mask;
- if (mask <= DMA_BIT_MASK(32))
+ if (!iommu_use_atu(iommu, mask))
tbl = &iommu->tbl;
else
tbl = &atu->tbl;