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-rw-r--r--arch/sparc/mm/io-unit.c38
-rw-r--r--arch/sparc/mm/iommu.c46
2 files changed, 44 insertions, 40 deletions
diff --git a/arch/sparc/mm/io-unit.c b/arch/sparc/mm/io-unit.c
index d8376f61b4d0..d409cb450de4 100644
--- a/arch/sparc/mm/io-unit.c
+++ b/arch/sparc/mm/io-unit.c
@@ -94,13 +94,14 @@ static int __init iounit_init(void)
subsys_initcall(iounit_init);
/* One has to hold iounit->lock to call this */
-static unsigned long iounit_get_area(struct iounit_struct *iounit, unsigned long vaddr, int size)
+static dma_addr_t iounit_get_area(struct iounit_struct *iounit,
+ phys_addr_t phys, int size)
{
int i, j, k, npages;
unsigned long rotor, scan, limit;
iopte_t iopte;
- npages = ((vaddr & ~PAGE_MASK) + size + (PAGE_SIZE-1)) >> PAGE_SHIFT;
+ npages = (offset_in_page(phys) + size + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
/* A tiny bit of magic ingredience :) */
switch (npages) {
@@ -109,7 +110,7 @@ static unsigned long iounit_get_area(struct iounit_struct *iounit, unsigned long
default: i = 0x0213; break;
}
- IOD(("iounit_get_area(%08lx,%d[%d])=", vaddr, size, npages));
+ IOD(("%s(%pa,%d[%d])=", __func__, &phys, size, npages));
next: j = (i & 15);
rotor = iounit->rotor[j - 1];
@@ -124,7 +125,8 @@ nexti: scan = find_next_zero_bit(iounit->bmap, limit, scan);
}
i >>= 4;
if (!(i & 15))
- panic("iounit_get_area: Couldn't find free iopte slots for (%08lx,%d)\n", vaddr, size);
+ panic("iounit_get_area: Couldn't find free iopte slots for (%pa,%d)\n",
+ &phys, size);
goto next;
}
for (k = 1, scan++; k < npages; k++)
@@ -132,30 +134,29 @@ nexti: scan = find_next_zero_bit(iounit->bmap, limit, scan);
goto nexti;
iounit->rotor[j - 1] = (scan < limit) ? scan : iounit->limit[j - 1];
scan -= npages;
- iopte = MKIOPTE(__pa(vaddr & PAGE_MASK));
- vaddr = IOUNIT_DMA_BASE + (scan << PAGE_SHIFT) + (vaddr & ~PAGE_MASK);
+ iopte = MKIOPTE(phys & PAGE_MASK);
+ phys = IOUNIT_DMA_BASE + (scan << PAGE_SHIFT) + offset_in_page(phys);
for (k = 0; k < npages; k++, iopte = __iopte(iopte_val(iopte) + 0x100), scan++) {
set_bit(scan, iounit->bmap);
sbus_writel(iopte_val(iopte), &iounit->page_table[scan]);
}
- IOD(("%08lx\n", vaddr));
- return vaddr;
+ IOD(("%pa\n", &phys));
+ return phys;
}
-static dma_addr_t iounit_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t len, enum dma_data_direction dir,
- unsigned long attrs)
+static dma_addr_t iounit_map_phys(struct device *dev, phys_addr_t phys,
+ size_t len, enum dma_data_direction dir, unsigned long attrs)
{
- void *vaddr = page_address(page) + offset;
struct iounit_struct *iounit = dev->archdata.iommu;
- unsigned long ret, flags;
+ unsigned long flags;
+ dma_addr_t ret;
/* XXX So what is maxphys for us and how do drivers know it? */
if (!len || len > 256 * 1024)
return DMA_MAPPING_ERROR;
spin_lock_irqsave(&iounit->lock, flags);
- ret = iounit_get_area(iounit, (unsigned long)vaddr, len);
+ ret = iounit_get_area(iounit, phys, len);
spin_unlock_irqrestore(&iounit->lock, flags);
return ret;
}
@@ -171,14 +172,15 @@ static int iounit_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
/* FIXME: Cache some resolved pages - often several sg entries are to the same page */
spin_lock_irqsave(&iounit->lock, flags);
for_each_sg(sgl, sg, nents, i) {
- sg->dma_address = iounit_get_area(iounit, (unsigned long) sg_virt(sg), sg->length);
+ sg->dma_address =
+ iounit_get_area(iounit, sg_phys(sg), sg->length);
sg->dma_length = sg->length;
}
spin_unlock_irqrestore(&iounit->lock, flags);
return nents;
}
-static void iounit_unmap_page(struct device *dev, dma_addr_t vaddr, size_t len,
+static void iounit_unmap_phys(struct device *dev, dma_addr_t vaddr, size_t len,
enum dma_data_direction dir, unsigned long attrs)
{
struct iounit_struct *iounit = dev->archdata.iommu;
@@ -279,8 +281,8 @@ static const struct dma_map_ops iounit_dma_ops = {
.alloc = iounit_alloc,
.free = iounit_free,
#endif
- .map_page = iounit_map_page,
- .unmap_page = iounit_unmap_page,
+ .map_phys = iounit_map_phys,
+ .unmap_phys = iounit_unmap_phys,
.map_sg = iounit_map_sg,
.unmap_sg = iounit_unmap_sg,
};
diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c
index 5a5080db800f..f48adf62724a 100644
--- a/arch/sparc/mm/iommu.c
+++ b/arch/sparc/mm/iommu.c
@@ -181,18 +181,20 @@ static void iommu_flush_iotlb(iopte_t *iopte, unsigned int niopte)
}
}
-static dma_addr_t __sbus_iommu_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t len, bool per_page_flush)
+static dma_addr_t __sbus_iommu_map_phys(struct device *dev, phys_addr_t paddr,
+ size_t len, bool per_page_flush, unsigned long attrs)
{
struct iommu_struct *iommu = dev->archdata.iommu;
- phys_addr_t paddr = page_to_phys(page) + offset;
- unsigned long off = paddr & ~PAGE_MASK;
+ unsigned long off = offset_in_page(paddr);
unsigned long npages = (off + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long pfn = __phys_to_pfn(paddr);
unsigned int busa, busa0;
iopte_t *iopte, *iopte0;
int ioptex, i;
+ if (unlikely(attrs & DMA_ATTR_MMIO))
+ return DMA_MAPPING_ERROR;
+
/* XXX So what is maxphys for us and how do drivers know it? */
if (!len || len > 256 * 1024)
return DMA_MAPPING_ERROR;
@@ -202,10 +204,10 @@ static dma_addr_t __sbus_iommu_map_page(struct device *dev, struct page *page,
* XXX Is this a good assumption?
* XXX What if someone else unmaps it here and races us?
*/
- if (per_page_flush && !PageHighMem(page)) {
+ if (per_page_flush && !PhysHighMem(paddr)) {
unsigned long vaddr, p;
- vaddr = (unsigned long)page_address(page) + offset;
+ vaddr = (unsigned long)phys_to_virt(paddr);
for (p = vaddr & PAGE_MASK; p < vaddr + len; p += PAGE_SIZE)
flush_page_for_dma(p);
}
@@ -231,19 +233,19 @@ static dma_addr_t __sbus_iommu_map_page(struct device *dev, struct page *page,
return busa0 + off;
}
-static dma_addr_t sbus_iommu_map_page_gflush(struct device *dev,
- struct page *page, unsigned long offset, size_t len,
- enum dma_data_direction dir, unsigned long attrs)
+static dma_addr_t sbus_iommu_map_phys_gflush(struct device *dev,
+ phys_addr_t phys, size_t len, enum dma_data_direction dir,
+ unsigned long attrs)
{
flush_page_for_dma(0);
- return __sbus_iommu_map_page(dev, page, offset, len, false);
+ return __sbus_iommu_map_phys(dev, phys, len, false, attrs);
}
-static dma_addr_t sbus_iommu_map_page_pflush(struct device *dev,
- struct page *page, unsigned long offset, size_t len,
- enum dma_data_direction dir, unsigned long attrs)
+static dma_addr_t sbus_iommu_map_phys_pflush(struct device *dev,
+ phys_addr_t phys, size_t len, enum dma_data_direction dir,
+ unsigned long attrs)
{
- return __sbus_iommu_map_page(dev, page, offset, len, true);
+ return __sbus_iommu_map_phys(dev, phys, len, true, attrs);
}
static int __sbus_iommu_map_sg(struct device *dev, struct scatterlist *sgl,
@@ -254,8 +256,8 @@ static int __sbus_iommu_map_sg(struct device *dev, struct scatterlist *sgl,
int j;
for_each_sg(sgl, sg, nents, j) {
- sg->dma_address =__sbus_iommu_map_page(dev, sg_page(sg),
- sg->offset, sg->length, per_page_flush);
+ sg->dma_address = __sbus_iommu_map_phys(dev, sg_phys(sg),
+ sg->length, per_page_flush, attrs);
if (sg->dma_address == DMA_MAPPING_ERROR)
return -EIO;
sg->dma_length = sg->length;
@@ -277,7 +279,7 @@ static int sbus_iommu_map_sg_pflush(struct device *dev, struct scatterlist *sgl,
return __sbus_iommu_map_sg(dev, sgl, nents, dir, attrs, true);
}
-static void sbus_iommu_unmap_page(struct device *dev, dma_addr_t dma_addr,
+static void sbus_iommu_unmap_phys(struct device *dev, dma_addr_t dma_addr,
size_t len, enum dma_data_direction dir, unsigned long attrs)
{
struct iommu_struct *iommu = dev->archdata.iommu;
@@ -303,7 +305,7 @@ static void sbus_iommu_unmap_sg(struct device *dev, struct scatterlist *sgl,
int i;
for_each_sg(sgl, sg, nents, i) {
- sbus_iommu_unmap_page(dev, sg->dma_address, sg->length, dir,
+ sbus_iommu_unmap_phys(dev, sg->dma_address, sg->length, dir,
attrs);
sg->dma_address = 0x21212121;
}
@@ -426,8 +428,8 @@ static const struct dma_map_ops sbus_iommu_dma_gflush_ops = {
.alloc = sbus_iommu_alloc,
.free = sbus_iommu_free,
#endif
- .map_page = sbus_iommu_map_page_gflush,
- .unmap_page = sbus_iommu_unmap_page,
+ .map_phys = sbus_iommu_map_phys_gflush,
+ .unmap_phys = sbus_iommu_unmap_phys,
.map_sg = sbus_iommu_map_sg_gflush,
.unmap_sg = sbus_iommu_unmap_sg,
};
@@ -437,8 +439,8 @@ static const struct dma_map_ops sbus_iommu_dma_pflush_ops = {
.alloc = sbus_iommu_alloc,
.free = sbus_iommu_free,
#endif
- .map_page = sbus_iommu_map_page_pflush,
- .unmap_page = sbus_iommu_unmap_page,
+ .map_phys = sbus_iommu_map_phys_pflush,
+ .unmap_phys = sbus_iommu_unmap_phys,
.map_sg = sbus_iommu_map_sg_pflush,
.unmap_sg = sbus_iommu_unmap_sg,
};
generated by cgit (git 2.34.1) at 2025-12-08 18:54:07 +0000