summaryrefslogtreecommitdiff
path: root/arch/arm64/mm/dma-mapping.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm64/mm/dma-mapping.c')
-rw-r--r--arch/arm64/mm/dma-mapping.c103
1 files changed, 52 insertions, 51 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index c566ec837..c4284c432 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -19,6 +19,7 @@
#include <linux/gfp.h>
#include <linux/acpi.h>
+#include <linux/bootmem.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/genalloc.h>
@@ -29,10 +30,12 @@
#include <asm/cacheflush.h>
-static pgprot_t __get_dma_pgprot(struct dma_attrs *attrs, pgprot_t prot,
+static int swiotlb __read_mostly;
+
+static pgprot_t __get_dma_pgprot(unsigned long attrs, pgprot_t prot,
bool coherent)
{
- if (!coherent || dma_get_attr(DMA_ATTR_WRITE_COMBINE, attrs))
+ if (!coherent || (attrs & DMA_ATTR_WRITE_COMBINE))
return pgprot_writecombine(prot);
return prot;
}
@@ -88,7 +91,7 @@ static int __free_from_pool(void *start, size_t size)
static void *__dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flags,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
if (dev == NULL) {
WARN_ONCE(1, "Use an actual device structure for DMA allocation\n");
@@ -118,7 +121,7 @@ static void *__dma_alloc_coherent(struct device *dev, size_t size,
static void __dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
bool freed;
phys_addr_t paddr = dma_to_phys(dev, dma_handle);
@@ -137,7 +140,7 @@ static void __dma_free_coherent(struct device *dev, size_t size,
static void *__dma_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flags,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
struct page *page;
void *ptr, *coherent_ptr;
@@ -185,7 +188,7 @@ no_mem:
static void __dma_free(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
void *swiotlb_addr = phys_to_virt(dma_to_phys(dev, dma_handle));
@@ -202,7 +205,7 @@ static void __dma_free(struct device *dev, size_t size,
static dma_addr_t __swiotlb_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
dma_addr_t dev_addr;
@@ -216,7 +219,7 @@ static dma_addr_t __swiotlb_map_page(struct device *dev, struct page *page,
static void __swiotlb_unmap_page(struct device *dev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
if (!is_device_dma_coherent(dev))
__dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
@@ -225,7 +228,7 @@ static void __swiotlb_unmap_page(struct device *dev, dma_addr_t dev_addr,
static int __swiotlb_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
int nelems, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
struct scatterlist *sg;
int i, ret;
@@ -242,7 +245,7 @@ static int __swiotlb_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
static void __swiotlb_unmap_sg_attrs(struct device *dev,
struct scatterlist *sgl, int nelems,
enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
struct scatterlist *sg;
int i;
@@ -303,7 +306,7 @@ static void __swiotlb_sync_sg_for_device(struct device *dev,
static int __swiotlb_mmap(struct device *dev,
struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
int ret = -ENXIO;
unsigned long nr_vma_pages = (vma->vm_end - vma->vm_start) >>
@@ -330,7 +333,7 @@ static int __swiotlb_mmap(struct device *dev,
static int __swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t handle, size_t size,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
int ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
@@ -341,6 +344,13 @@ static int __swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt,
return ret;
}
+static int __swiotlb_dma_supported(struct device *hwdev, u64 mask)
+{
+ if (swiotlb)
+ return swiotlb_dma_supported(hwdev, mask);
+ return 1;
+}
+
static struct dma_map_ops swiotlb_dma_ops = {
.alloc = __dma_alloc,
.free = __dma_free,
@@ -354,7 +364,7 @@ static struct dma_map_ops swiotlb_dma_ops = {
.sync_single_for_device = __swiotlb_sync_single_for_device,
.sync_sg_for_cpu = __swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = __swiotlb_sync_sg_for_device,
- .dma_supported = swiotlb_dma_supported,
+ .dma_supported = __swiotlb_dma_supported,
.mapping_error = swiotlb_dma_mapping_error,
};
@@ -425,21 +435,21 @@ out:
static void *__dummy_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flags,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
return NULL;
}
static void __dummy_free(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
}
static int __dummy_mmap(struct device *dev,
struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
return -ENXIO;
}
@@ -447,20 +457,20 @@ static int __dummy_mmap(struct device *dev,
static dma_addr_t __dummy_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
return DMA_ERROR_CODE;
}
static void __dummy_unmap_page(struct device *dev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
}
static int __dummy_map_sg(struct device *dev, struct scatterlist *sgl,
int nelems, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
return 0;
}
@@ -468,7 +478,7 @@ static int __dummy_map_sg(struct device *dev, struct scatterlist *sgl,
static void __dummy_unmap_sg(struct device *dev,
struct scatterlist *sgl, int nelems,
enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
}
@@ -513,6 +523,9 @@ EXPORT_SYMBOL(dummy_dma_ops);
static int __init arm64_dma_init(void)
{
+ if (swiotlb_force || max_pfn > (arm64_dma_phys_limit >> PAGE_SHIFT))
+ swiotlb = 1;
+
return atomic_pool_init();
}
arch_initcall(arm64_dma_init);
@@ -540,7 +553,7 @@ static void flush_page(struct device *dev, const void *virt, phys_addr_t phys)
static void *__iommu_alloc_attrs(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
bool coherent = is_device_dma_coherent(dev);
int ioprot = dma_direction_to_prot(DMA_BIDIRECTIONAL, coherent);
@@ -600,7 +613,7 @@ static void *__iommu_alloc_attrs(struct device *dev, size_t size,
}
static void __iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
- dma_addr_t handle, struct dma_attrs *attrs)
+ dma_addr_t handle, unsigned long attrs)
{
size_t iosize = size;
@@ -616,7 +629,7 @@ static void __iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
* Hence how dodgy the below logic looks...
*/
if (__in_atomic_pool(cpu_addr, size)) {
- iommu_dma_unmap_page(dev, handle, iosize, 0, NULL);
+ iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
__free_from_pool(cpu_addr, size);
} else if (is_vmalloc_addr(cpu_addr)){
struct vm_struct *area = find_vm_area(cpu_addr);
@@ -626,14 +639,14 @@ static void __iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
iommu_dma_free(dev, area->pages, iosize, &handle);
dma_common_free_remap(cpu_addr, size, VM_USERMAP);
} else {
- iommu_dma_unmap_page(dev, handle, iosize, 0, NULL);
+ iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
__free_pages(virt_to_page(cpu_addr), get_order(size));
}
}
static int __iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
struct vm_struct *area;
int ret;
@@ -653,7 +666,7 @@ static int __iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
static int __iommu_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t dma_addr,
- size_t size, struct dma_attrs *attrs)
+ size_t size, unsigned long attrs)
{
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
struct vm_struct *area = find_vm_area(cpu_addr);
@@ -694,14 +707,14 @@ static void __iommu_sync_single_for_device(struct device *dev,
static dma_addr_t __iommu_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
bool coherent = is_device_dma_coherent(dev);
int prot = dma_direction_to_prot(dir, coherent);
dma_addr_t dev_addr = iommu_dma_map_page(dev, page, offset, size, prot);
if (!iommu_dma_mapping_error(dev, dev_addr) &&
- !dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
+ (attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
__iommu_sync_single_for_device(dev, dev_addr, size, dir);
return dev_addr;
@@ -709,9 +722,9 @@ static dma_addr_t __iommu_map_page(struct device *dev, struct page *page,
static void __iommu_unmap_page(struct device *dev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
- if (!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
+ if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
__iommu_sync_single_for_cpu(dev, dev_addr, size, dir);
iommu_dma_unmap_page(dev, dev_addr, size, dir, attrs);
@@ -747,11 +760,11 @@ static void __iommu_sync_sg_for_device(struct device *dev,
static int __iommu_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
int nelems, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
bool coherent = is_device_dma_coherent(dev);
- if (!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
+ if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
__iommu_sync_sg_for_device(dev, sgl, nelems, dir);
return iommu_dma_map_sg(dev, sgl, nelems,
@@ -761,9 +774,9 @@ static int __iommu_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
static void __iommu_unmap_sg_attrs(struct device *dev,
struct scatterlist *sgl, int nelems,
enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
- if (!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
+ if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
__iommu_sync_sg_for_cpu(dev, sgl, nelems, dir);
iommu_dma_unmap_sg(dev, sgl, nelems, dir, attrs);
@@ -848,15 +861,16 @@ static int __iommu_attach_notifier(struct notifier_block *nb,
{
struct iommu_dma_notifier_data *master, *tmp;
- if (action != BUS_NOTIFY_ADD_DEVICE)
+ if (action != BUS_NOTIFY_BIND_DRIVER)
return 0;
mutex_lock(&iommu_dma_notifier_lock);
list_for_each_entry_safe(master, tmp, &iommu_dma_masters, list) {
- if (do_iommu_attach(master->dev, master->ops,
- master->dma_base, master->size)) {
+ if (data == master->dev && do_iommu_attach(master->dev,
+ master->ops, master->dma_base, master->size)) {
list_del(&master->list);
kfree(master);
+ break;
}
}
mutex_unlock(&iommu_dma_notifier_lock);
@@ -870,17 +884,8 @@ static int __init register_iommu_dma_ops_notifier(struct bus_type *bus)
if (!nb)
return -ENOMEM;
- /*
- * The device must be attached to a domain before the driver probe
- * routine gets a chance to start allocating DMA buffers. However,
- * the IOMMU driver also needs a chance to configure the iommu_group
- * via its add_device callback first, so we need to make the attach
- * happen between those two points. Since the IOMMU core uses a bus
- * notifier with default priority for add_device, do the same but
- * with a lower priority to ensure the appropriate ordering.
- */
+
nb->notifier_call = __iommu_attach_notifier;
- nb->priority = -100;
ret = bus_register_notifier(bus, nb);
if (ret) {
@@ -904,10 +909,6 @@ static int __init __iommu_dma_init(void)
if (!ret)
ret = register_iommu_dma_ops_notifier(&pci_bus_type);
#endif
-
- /* handle devices queued before this arch_initcall */
- if (!ret)
- __iommu_attach_notifier(NULL, BUS_NOTIFY_ADD_DEVICE, NULL);
return ret;
}
arch_initcall(__iommu_dma_init);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-09-05 22:02:42 +0000