Some architectures need it.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
arch/x86/kernel/pci-swiotlb_64.c | 2 -
include/linux/swiotlb.h | 3 +-
lib/swiotlb.c | 45 +++++++++++++++-----------------------
3 files changed, 21 insertions(+), 29 deletions(-)
diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ b/arch/x86/kernel/pci-swiotlb_64.c
@@ -23,7 +23,7 @@
return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
}
-dma_addr_t swiotlb_phys_to_bus(phys_addr_t paddr)
+dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
{
return paddr;
}
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -27,7 +27,8 @@
extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs);
extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
-extern dma_addr_t swiotlb_phys_to_bus(phys_addr_t address);
+extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
+ phys_addr_t address);
extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
extern int swiotlb_arch_range_needs_mapping(void *ptr, size_t size);
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -125,7 +125,7 @@
return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
}
-dma_addr_t __weak swiotlb_phys_to_bus(phys_addr_t paddr)
+dma_addr_t __weak swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
{
return paddr;
}
@@ -135,9 +135,10 @@
return baddr;
}
-static dma_addr_t swiotlb_virt_to_bus(volatile void *address)
+static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
+ volatile void *address)
{
- return swiotlb_phys_to_bus(virt_to_phys(address));
+ return swiotlb_phys_to_bus(hwdev, virt_to_phys(address));
}
static void *swiotlb_bus_to_virt(dma_addr_t address)
@@ -153,27 +154,15 @@
static void swiotlb_print_info(unsigned long bytes)
{
phys_addr_t pstart, pend;
- dma_addr_t bstart, bend;
pstart = virt_to_phys(io_tlb_start);
pend = virt_to_phys(io_tlb_end);
- bstart = swiotlb_phys_to_bus(pstart);
- bend = swiotlb_phys_to_bus(pend);
-
printk(KERN_INFO "Placing %luMB software IO TLB between %p - %p\n",
bytes >> 20, io_tlb_start, io_tlb_end);
- if (pstart != bstart || pend != bend)
- printk(KERN_INFO "software IO TLB at phys %#llx - %#llx"
- " bus %#llx - %#llx\n",
- (unsigned long long)pstart,
- (unsigned long long)pend,
- (unsigned long long)bstart,
- (unsigned long long)bend);
- else
- printk(KERN_INFO "software IO TLB at phys %#llx - %#llx\n",
- (unsigned long long)pstart,
- (unsigned long long)pend);
+ printk(KERN_INFO "software IO TLB at phys %#llx - %#llx\n",
+ (unsigned long long)pstart,
+ (unsigned long long)pend);
}
/*
@@ -351,7 +340,7 @@
unsigned long max_slots;
mask = dma_get_seg_boundary(hwdev);
- start_dma_addr = swiotlb_virt_to_bus(io_tlb_start) & mask;
+ start_dma_addr = swiotlb_virt_to_bus(hwdev, io_tlb_start) & mask;
offset_slots = ALIGN(start_dma_addr, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT;
@@ -528,7 +517,9 @@
dma_mask = hwdev->coherent_dma_mask;
ret = (void *)__get_free_pages(flags, order);
- if (ret && !is_buffer_dma_capable(dma_mask, swiotlb_virt_to_bus(ret),
size)) {
+ if (ret &&
+ !is_buffer_dma_capable(dma_mask, swiotlb_virt_to_bus(hwdev, ret),
+ size)) {
/*
* The allocated memory isn't reachable by the device.
* Fall back on swiotlb_map_single().
@@ -549,7 +540,7 @@
}
memset(ret, 0, size);
- dev_addr = swiotlb_virt_to_bus(ret);
+ dev_addr = swiotlb_virt_to_bus(hwdev, ret);
/* Confirm address can be DMA'd by device */
if (!is_buffer_dma_capable(dma_mask, dev_addr, size)) {
@@ -609,7 +600,7 @@
swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
int dir, struct dma_attrs *attrs)
{
- dma_addr_t dev_addr = swiotlb_virt_to_bus(ptr);
+ dma_addr_t dev_addr = swiotlb_virt_to_bus(hwdev, ptr);
void *map;
BUG_ON(dir == DMA_NONE);
@@ -631,7 +622,7 @@
map = io_tlb_overflow_buffer;
}
- dev_addr = swiotlb_virt_to_bus(map);
+ dev_addr = swiotlb_virt_to_bus(hwdev, map);
/*
* Ensure that the address returned is DMA'ble
@@ -778,7 +769,7 @@
for_each_sg(sgl, sg, nelems, i) {
addr = SG_ENT_VIRT_ADDRESS(sg);
- dev_addr = swiotlb_virt_to_bus(addr);
+ dev_addr = swiotlb_virt_to_bus(hwdev, addr);
if (range_needs_mapping(sg_virt(sg), sg->length) ||
address_needs_mapping(hwdev, dev_addr, sg->length)) {
void *map = map_single(hwdev, addr, sg->length, dir);
@@ -791,7 +782,7 @@
sgl[0].dma_length = 0;
return 0;
}
- sg->dma_address = swiotlb_virt_to_bus(map);
+ sg->dma_address = swiotlb_virt_to_bus(hwdev, map);
} else
sg->dma_address = dev_addr;
sg->dma_length = sg->length;
@@ -879,7 +870,7 @@
int
swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr)
{
- return (dma_addr == swiotlb_virt_to_bus(io_tlb_overflow_buffer));
+ return (dma_addr == swiotlb_virt_to_bus(hwdev, io_tlb_overflow_buffer));
}
/*
@@ -891,7 +882,7 @@
int
swiotlb_dma_supported(struct device *hwdev, u64 mask)
{
- return swiotlb_virt_to_bus(io_tlb_end - 1) <= mask;
+ return swiotlb_virt_to_bus(hwdev, io_tlb_end - 1) <= mask;
}
EXPORT_SYMBOL(swiotlb_map_single);
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