Commit 1ba73b99 authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] kexec: Use EFI_LOADER_DATA for ELF core header
  [IA64] permon use-after-free fix
  [IA64] sync compat getdents
  [IA64] always build arch/ia64/lib/xor.o
  [IA64] Remove stack hard limit on ia64
  [IA64] point saved_max_pfn to the max_pfn of the entire system
  Revert "[IA64] swiotlb abstraction (e.g. for Xen)"
parents 185d84b4 cee87af2
......@@ -1267,6 +1267,10 @@ sys32_getdents (unsigned int fd, struct compat_dirent __user *dirent, unsigned i
struct getdents32_callback buf;
int error;
error = -EFAULT;
if (!access_ok(VERIFY_WRITE, dirent, count))
goto out;
error = -EBADF;
file = fget(fd);
if (!file)
......@@ -1283,10 +1287,10 @@ sys32_getdents (unsigned int fd, struct compat_dirent __user *dirent, unsigned i
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
error = -EINVAL;
if (put_user(file->f_pos, &lastdirent->d_off))
goto out_putf;
error = count - buf.count;
error = -EFAULT;
else
error = count - buf.count;
}
out_putf:
......
......@@ -21,6 +21,7 @@
* Skip non-WB memory and ignore empty memory ranges.
*/
#include <linux/module.h>
#include <linux/bootmem.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
......@@ -1009,6 +1010,11 @@ efi_memmap_init(unsigned long *s, unsigned long *e)
} else
ae = efi_md_end(md);
#ifdef CONFIG_CRASH_DUMP
/* saved_max_pfn should ignore max_addr= command line arg */
if (saved_max_pfn < (ae >> PAGE_SHIFT))
saved_max_pfn = (ae >> PAGE_SHIFT);
#endif
/* keep within max_addr= and min_addr= command line arg */
as = max(as, min_addr);
ae = min(ae, max_addr);
......@@ -1177,3 +1183,33 @@ kdump_find_rsvd_region (unsigned long size,
return ~0UL;
}
#endif
#ifdef CONFIG_PROC_VMCORE
/* locate the size find a the descriptor at a certain address */
unsigned long
vmcore_find_descriptor_size (unsigned long address)
{
void *efi_map_start, *efi_map_end, *p;
efi_memory_desc_t *md;
u64 efi_desc_size;
unsigned long ret = 0;
efi_map_start = __va(ia64_boot_param->efi_memmap);
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
efi_desc_size = ia64_boot_param->efi_memdesc_size;
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
md = p;
if (efi_wb(md) && md->type == EFI_LOADER_DATA
&& md->phys_addr == address) {
ret = efi_md_size(md);
break;
}
}
if (ret == 0)
printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n");
return ret;
}
#endif
......@@ -2299,7 +2299,7 @@ pfm_remap_buffer(struct vm_area_struct *vma, unsigned long buf, unsigned long ad
* allocate a sampling buffer and remaps it into the user address space of the task
*/
static int
pfm_smpl_buffer_alloc(struct task_struct *task, pfm_context_t *ctx, unsigned long rsize, void **user_vaddr)
pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t *ctx, unsigned long rsize, void **user_vaddr)
{
struct mm_struct *mm = task->mm;
struct vm_area_struct *vma = NULL;
......@@ -2349,6 +2349,7 @@ pfm_smpl_buffer_alloc(struct task_struct *task, pfm_context_t *ctx, unsigned lon
* partially initialize the vma for the sampling buffer
*/
vma->vm_mm = mm;
vma->vm_file = filp;
vma->vm_flags = VM_READ| VM_MAYREAD |VM_RESERVED;
vma->vm_page_prot = PAGE_READONLY; /* XXX may need to change */
......@@ -2387,6 +2388,8 @@ pfm_smpl_buffer_alloc(struct task_struct *task, pfm_context_t *ctx, unsigned lon
goto error;
}
get_file(filp);
/*
* now insert the vma in the vm list for the process, must be
* done with mmap lock held
......@@ -2464,7 +2467,7 @@ pfarg_is_sane(struct task_struct *task, pfarg_context_t *pfx)
}
static int
pfm_setup_buffer_fmt(struct task_struct *task, pfm_context_t *ctx, unsigned int ctx_flags,
pfm_setup_buffer_fmt(struct task_struct *task, struct file *filp, pfm_context_t *ctx, unsigned int ctx_flags,
unsigned int cpu, pfarg_context_t *arg)
{
pfm_buffer_fmt_t *fmt = NULL;
......@@ -2505,7 +2508,7 @@ pfm_setup_buffer_fmt(struct task_struct *task, pfm_context_t *ctx, unsigned int
/*
* buffer is always remapped into the caller's address space
*/
ret = pfm_smpl_buffer_alloc(current, ctx, size, &uaddr);
ret = pfm_smpl_buffer_alloc(current, filp, ctx, size, &uaddr);
if (ret) goto error;
/* keep track of user address of buffer */
......@@ -2716,7 +2719,7 @@ pfm_context_create(pfm_context_t *ctx, void *arg, int count, struct pt_regs *reg
* does the user want to sample?
*/
if (pfm_uuid_cmp(req->ctx_smpl_buf_id, pfm_null_uuid)) {
ret = pfm_setup_buffer_fmt(current, ctx, ctx_flags, 0, req);
ret = pfm_setup_buffer_fmt(current, filp, ctx, ctx_flags, 0, req);
if (ret) goto buffer_error;
}
......
......@@ -251,6 +251,12 @@ reserve_memory (void)
}
#endif
#ifdef CONFIG_PROC_VMCORE
if (reserve_elfcorehdr(&rsvd_region[n].start,
&rsvd_region[n].end) == 0)
n++;
#endif
efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
n++;
......@@ -453,6 +459,30 @@ static int __init parse_elfcorehdr(char *arg)
return 0;
}
early_param("elfcorehdr", parse_elfcorehdr);
int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
{
unsigned long length;
/* We get the address using the kernel command line,
* but the size is extracted from the EFI tables.
* Both address and size are required for reservation
* to work properly.
*/
if (elfcorehdr_addr >= ELFCORE_ADDR_MAX)
return -EINVAL;
if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
elfcorehdr_addr = ELFCORE_ADDR_MAX;
return -EINVAL;
}
*start = (unsigned long)__va(elfcorehdr_addr);
*end = *start + length;
return 0;
}
#endif /* CONFIG_PROC_VMCORE */
void __init
......
......@@ -9,12 +9,11 @@ lib-y := __divsi3.o __udivsi3.o __modsi3.o __umodsi3.o \
checksum.o clear_page.o csum_partial_copy.o \
clear_user.o strncpy_from_user.o strlen_user.o strnlen_user.o \
flush.o ip_fast_csum.o do_csum.o \
memset.o strlen.o
memset.o strlen.o xor.o
lib-$(CONFIG_ITANIUM) += copy_page.o copy_user.o memcpy.o
lib-$(CONFIG_MCKINLEY) += copy_page_mck.o memcpy_mck.o
lib-$(CONFIG_PERFMON) += carta_random.o
lib-$(CONFIG_MD_RAID456) += xor.o
AFLAGS___divdi3.o =
AFLAGS___udivdi3.o = -DUNSIGNED
......
......@@ -197,11 +197,6 @@ find_memory (void)
find_initrd();
#ifdef CONFIG_CRASH_DUMP
/* If we are doing a crash dump, we still need to know the real mem
* size before original memory map is reset. */
saved_max_pfn = max_pfn;
#endif
}
#ifdef CONFIG_SMP
......
......@@ -480,12 +480,6 @@ void __init find_memory(void)
max_pfn = max_low_pfn;
find_initrd();
#ifdef CONFIG_CRASH_DUMP
/* If we are doing a crash dump, we still need to know the real mem
* size before original memory map is reset. */
saved_max_pfn = max_pfn;
#endif
}
#ifdef CONFIG_SMP
......
......@@ -17,10 +17,11 @@
* - kernel code & data
* - crash dumping code reserved region
* - Kernel memory map built from EFI memory map
* - ELF core header
*
* More could be added if necessary
*/
#define IA64_MAX_RSVD_REGIONS 7
#define IA64_MAX_RSVD_REGIONS 8
struct rsvd_region {
unsigned long start; /* virtual address of beginning of element */
......@@ -36,6 +37,9 @@ extern void find_initrd (void);
extern int filter_rsvd_memory (unsigned long start, unsigned long end, void *arg);
extern void efi_memmap_init(unsigned long *, unsigned long *);
extern unsigned long vmcore_find_descriptor_size(unsigned long address);
extern int reserve_elfcorehdr(unsigned long *start, unsigned long *end);
/*
* For rounding an address to the next IA64_GRANULE_SIZE or order
*/
......
......@@ -2,7 +2,6 @@
#define _ASM_IA64_RESOURCE_H
#include <asm/ustack.h>
#define _STK_LIM_MAX DEFAULT_USER_STACK_SIZE
#include <asm-generic/resource.h>
#endif /* _ASM_IA64_RESOURCE_H */
#ifndef _ASM_SWIOTLB_H
#define _ASM_SWIOTLB_H 1
#include <asm/machvec.h>
#define SWIOTLB_ARCH_NEED_LATE_INIT
#define SWIOTLB_ARCH_NEED_ALLOC
#endif /* _ASM_SWIOTLB_H */
......@@ -44,7 +44,6 @@ extern void swiotlb_init(void);
extern int swiotlb_force;
#ifdef CONFIG_SWIOTLB
#define SWIOTLB_ARCH_NEED_ALLOC
extern int swiotlb;
#else
#define swiotlb 0
......
......@@ -28,7 +28,6 @@
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/scatterlist.h>
#include <asm/swiotlb.h>
#include <linux/init.h>
#include <linux/bootmem.h>
......@@ -36,10 +35,8 @@
#define OFFSET(val,align) ((unsigned long) \
( (val) & ( (align) - 1)))
#ifndef SG_ENT_VIRT_ADDRESS
#define SG_ENT_VIRT_ADDRESS(sg) (page_address((sg)->page) + (sg)->offset)
#define SG_ENT_PHYS_ADDRESS(sg) virt_to_bus(SG_ENT_VIRT_ADDRESS(sg))
#endif
/*
* Maximum allowable number of contiguous slabs to map,
......@@ -104,25 +101,13 @@ static unsigned int io_tlb_index;
* We need to save away the original address corresponding to a mapped entry
* for the sync operations.
*/
#ifndef SWIOTLB_ARCH_HAS_IO_TLB_ADDR_T
typedef char *io_tlb_addr_t;
#define swiotlb_orig_addr_null(buffer) (!(buffer))
#define ptr_to_io_tlb_addr(ptr) (ptr)
#define page_to_io_tlb_addr(pg, off) (page_address(pg) + (off))
#define sg_to_io_tlb_addr(sg) SG_ENT_VIRT_ADDRESS(sg)
#endif
static io_tlb_addr_t *io_tlb_orig_addr;
static unsigned char **io_tlb_orig_addr;
/*
* Protect the above data structures in the map and unmap calls
*/
static DEFINE_SPINLOCK(io_tlb_lock);
#ifdef SWIOTLB_EXTRA_VARIABLES
SWIOTLB_EXTRA_VARIABLES;
#endif
#ifndef SWIOTLB_ARCH_HAS_SETUP_IO_TLB_NPAGES
static int __init
setup_io_tlb_npages(char *str)
{
......@@ -137,25 +122,9 @@ setup_io_tlb_npages(char *str)
swiotlb_force = 1;
return 1;
}
#endif
__setup("swiotlb=", setup_io_tlb_npages);
/* make io_tlb_overflow tunable too? */
#ifndef swiotlb_adjust_size
#define swiotlb_adjust_size(size) ((void)0)
#endif
#ifndef swiotlb_adjust_seg
#define swiotlb_adjust_seg(start, size) ((void)0)
#endif
#ifndef swiotlb_print_info
#define swiotlb_print_info(bytes) \
printk(KERN_INFO "Placing %luMB software IO TLB between 0x%lx - " \
"0x%lx\n", bytes >> 20, \
virt_to_bus(io_tlb_start), virt_to_bus(io_tlb_end))
#endif
/*
* Statically reserve bounce buffer space and initialize bounce buffer data
* structures for the software IO TLB used to implement the DMA API.
......@@ -169,8 +138,6 @@ swiotlb_init_with_default_size(size_t default_size)
io_tlb_nslabs = (default_size >> IO_TLB_SHIFT);
io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE);
}
swiotlb_adjust_size(io_tlb_nslabs);
swiotlb_adjust_size(io_tlb_overflow);
bytes = io_tlb_nslabs << IO_TLB_SHIFT;
......@@ -188,14 +155,10 @@ swiotlb_init_with_default_size(size_t default_size)
* between io_tlb_start and io_tlb_end.
*/
io_tlb_list = alloc_bootmem(io_tlb_nslabs * sizeof(int));
for (i = 0; i < io_tlb_nslabs; i++) {
if ( !(i % IO_TLB_SEGSIZE) )
swiotlb_adjust_seg(io_tlb_start + (i << IO_TLB_SHIFT),
IO_TLB_SEGSIZE << IO_TLB_SHIFT);
for (i = 0; i < io_tlb_nslabs; i++)
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
}
io_tlb_index = 0;
io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(io_tlb_addr_t));
io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(char *));
/*
* Get the overflow emergency buffer
......@@ -203,21 +166,17 @@ swiotlb_init_with_default_size(size_t default_size)
io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow);
if (!io_tlb_overflow_buffer)
panic("Cannot allocate SWIOTLB overflow buffer!\n");
swiotlb_adjust_seg(io_tlb_overflow_buffer, io_tlb_overflow);
swiotlb_print_info(bytes);
printk(KERN_INFO "Placing software IO TLB between 0x%lx - 0x%lx\n",
virt_to_bus(io_tlb_start), virt_to_bus(io_tlb_end));
}
#ifndef __swiotlb_init_with_default_size
#define __swiotlb_init_with_default_size swiotlb_init_with_default_size
#endif
void __init
swiotlb_init(void)
{
__swiotlb_init_with_default_size(64 * (1<<20)); /* default to 64MB */
swiotlb_init_with_default_size(64 * (1<<20)); /* default to 64MB */
}
#ifdef SWIOTLB_ARCH_NEED_LATE_INIT
/*
* Systems with larger DMA zones (those that don't support ISA) can
* initialize the swiotlb later using the slab allocator if needed.
......@@ -275,12 +234,12 @@ swiotlb_late_init_with_default_size(size_t default_size)
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
io_tlb_index = 0;
io_tlb_orig_addr = (io_tlb_addr_t *)__get_free_pages(GFP_KERNEL,
get_order(io_tlb_nslabs * sizeof(io_tlb_addr_t)));
io_tlb_orig_addr = (unsigned char **)__get_free_pages(GFP_KERNEL,
get_order(io_tlb_nslabs * sizeof(char *)));
if (!io_tlb_orig_addr)
goto cleanup3;
memset(io_tlb_orig_addr, 0, io_tlb_nslabs * sizeof(io_tlb_addr_t));
memset(io_tlb_orig_addr, 0, io_tlb_nslabs * sizeof(char *));
/*
* Get the overflow emergency buffer
......@@ -290,17 +249,19 @@ swiotlb_late_init_with_default_size(size_t default_size)
if (!io_tlb_overflow_buffer)
goto cleanup4;
swiotlb_print_info(bytes);
printk(KERN_INFO "Placing %luMB software IO TLB between 0x%lx - "
"0x%lx\n", bytes >> 20,
virt_to_bus(io_tlb_start), virt_to_bus(io_tlb_end));
return 0;
cleanup4:
free_pages((unsigned long)io_tlb_orig_addr,
get_order(io_tlb_nslabs * sizeof(io_tlb_addr_t)));
free_pages((unsigned long)io_tlb_orig_addr, get_order(io_tlb_nslabs *
sizeof(char *)));
io_tlb_orig_addr = NULL;
cleanup3:
free_pages((unsigned long)io_tlb_list,
get_order(io_tlb_nslabs * sizeof(int)));
free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs *
sizeof(int)));
io_tlb_list = NULL;
cleanup2:
io_tlb_end = NULL;
......@@ -310,9 +271,7 @@ swiotlb_late_init_with_default_size(size_t default_size)
io_tlb_nslabs = req_nslabs;
return -ENOMEM;
}
#endif
#ifndef SWIOTLB_ARCH_HAS_NEEDS_MAPPING
static int
address_needs_mapping(struct device *hwdev, dma_addr_t addr)
{
......@@ -323,35 +282,11 @@ address_needs_mapping(struct device *hwdev, dma_addr_t addr)
return (addr & ~mask) != 0;
}
static inline int range_needs_mapping(const void *ptr, size_t size)
{
return swiotlb_force;
}
static inline int order_needs_mapping(unsigned int order)
{
return 0;
}
#endif
static void
__sync_single(io_tlb_addr_t buffer, char *dma_addr, size_t size, int dir)
{
#ifndef SWIOTLB_ARCH_HAS_SYNC_SINGLE
if (dir == DMA_TO_DEVICE)
memcpy(dma_addr, buffer, size);
else
memcpy(buffer, dma_addr, size);
#else
__swiotlb_arch_sync_single(buffer, dma_addr, size, dir);
#endif
}
/*
* Allocates bounce buffer and returns its kernel virtual address.
*/
static void *
map_single(struct device *hwdev, io_tlb_addr_t buffer, size_t size, int dir)
map_single(struct device *hwdev, char *buffer, size_t size, int dir)
{
unsigned long flags;
char *dma_addr;
......@@ -424,7 +359,7 @@ map_single(struct device *hwdev, io_tlb_addr_t buffer, size_t size, int dir)
*/
io_tlb_orig_addr[index] = buffer;
if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
__sync_single(buffer, dma_addr, size, DMA_TO_DEVICE);
memcpy(dma_addr, buffer, size);
return dma_addr;
}
......@@ -438,18 +373,17 @@ unmap_single(struct device *hwdev, char *dma_addr, size_t size, int dir)
unsigned long flags;
int i, count, nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT;
int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT;
io_tlb_addr_t buffer = io_tlb_orig_addr[index];
char *buffer = io_tlb_orig_addr[index];
/*
* First, sync the memory before unmapping the entry
*/
if (!swiotlb_orig_addr_null(buffer)
&& ((dir == DMA_FROM_DEVICE) || (dir == DMA_BIDIRECTIONAL)))
if (buffer && ((dir == DMA_FROM_DEVICE) || (dir == DMA_BIDIRECTIONAL)))
/*
* bounce... copy the data back into the original buffer * and
* delete the bounce buffer.
*/
__sync_single(buffer, dma_addr, size, DMA_FROM_DEVICE);
memcpy(buffer, dma_addr, size);
/*
* Return the buffer to the free list by setting the corresponding
......@@ -482,18 +416,18 @@ sync_single(struct device *hwdev, char *dma_addr, size_t size,
int dir, int target)
{
int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT;
io_tlb_addr_t buffer = io_tlb_orig_addr[index];
char *buffer = io_tlb_orig_addr[index];
switch (target) {
case SYNC_FOR_CPU:
if (likely(dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
__sync_single(buffer, dma_addr, size, DMA_FROM_DEVICE);
memcpy(buffer, dma_addr, size);
else
BUG_ON(dir != DMA_TO_DEVICE);
break;
case SYNC_FOR_DEVICE:
if (likely(dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))
__sync_single(buffer, dma_addr, size, DMA_TO_DEVICE);
memcpy(dma_addr, buffer, size);
else
BUG_ON(dir != DMA_FROM_DEVICE);
break;
......@@ -502,8 +436,6 @@ sync_single(struct device *hwdev, char *dma_addr, size_t size,
}
}
#ifdef SWIOTLB_ARCH_NEED_ALLOC
void *
swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags)
......@@ -519,10 +451,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
*/
flags |= GFP_DMA;
if (!order_needs_mapping(order))
ret = (void *)__get_free_pages(flags, order);
else
ret = NULL;
ret = (void *)__get_free_pages(flags, order);
if (ret && address_needs_mapping(hwdev, virt_to_bus(ret))) {
/*
* The allocated memory isn't reachable by the device.
......@@ -560,7 +489,6 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
*dma_handle = dev_addr;
return ret;
}
EXPORT_SYMBOL(swiotlb_alloc_coherent);
void
swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
......@@ -573,9 +501,6 @@ swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */
swiotlb_unmap_single (hwdev, dma_handle, size, DMA_TO_DEVICE);
}
EXPORT_SYMBOL(swiotlb_free_coherent);
#endif
static void
swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
......@@ -617,14 +542,13 @@ swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir)
* we can safely return the device addr and not worry about bounce
* buffering it.
*/
if (!range_needs_mapping(ptr, size)
&& !address_needs_mapping(hwdev, dev_addr))
if (!address_needs_mapping(hwdev, dev_addr) && !swiotlb_force)
return dev_addr;
/*
* Oh well, have to allocate and map a bounce buffer.
*/
map = map_single(hwdev, ptr_to_io_tlb_addr(ptr), size, dir);
map = map_single(hwdev, ptr, size, dir);
if (!map) {
swiotlb_full(hwdev, size, dir, 1);
map = io_tlb_overflow_buffer;
......@@ -752,16 +676,17 @@ int
swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nelems,
int dir)
{
void *addr;
dma_addr_t dev_addr;
int i;
BUG_ON(dir == DMA_NONE);
for (i = 0; i < nelems; i++, sg++) {
dev_addr = SG_ENT_PHYS_ADDRESS(sg);
if (range_needs_mapping(SG_ENT_VIRT_ADDRESS(sg), sg->length)
|| address_needs_mapping(hwdev, dev_addr)) {
void *map = map_single(hwdev, sg_to_io_tlb_addr(sg), sg->length, dir);
addr = SG_ENT_VIRT_ADDRESS(sg);
dev_addr = virt_to_bus(addr);
if (swiotlb_force || address_needs_mapping(hwdev, dev_addr)) {
void *map = map_single(hwdev, addr, sg->length, dir);
if (!map) {
/* Don't panic here, we expect map_sg users
to do proper error handling. */
......@@ -835,44 +760,6 @@ swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE);
}
#ifdef SWIOTLB_ARCH_NEED_MAP_PAGE
dma_addr_t
swiotlb_map_page(struct device *hwdev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
dma_addr_t dev_addr;
char *map;
dev_addr = page_to_bus(page) + offset;
if (address_needs_mapping(hwdev, dev_addr)) {
map = map_single(hwdev, page_to_io_tlb_addr(page, offset), size, direction);
if (!map) {
swiotlb_full(hwdev, size, direction, 1);
map = io_tlb_overflow_buffer;
}
dev_addr = virt_to_bus(map);
}
return dev_addr;
}
void
swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction direction)
{
char *dma_addr = bus_to_virt(dev_addr);
BUG_ON(direction == DMA_NONE);
if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
unmap_single(hwdev, dma_addr, size, direction);
else if (direction == DMA_FROM_DEVICE)
dma_mark_clean(dma_addr, size);
}
#endif
int
swiotlb_dma_mapping_error(dma_addr_t dma_addr)
{
......@@ -885,13 +772,10 @@ swiotlb_dma_mapping_error(dma_addr_t dma_addr)
* during bus mastering, then you would pass 0x00ffffff as the mask to
* this function.
*/
#ifndef __swiotlb_dma_supported
#define __swiotlb_dma_supported(hwdev, mask) (virt_to_bus(io_tlb_end - 1) <= (mask))
#endif
int
swiotlb_dma_supported(struct device *hwdev, u64 mask)
{
return __swiotlb_dma_supported(hwdev, mask);
return virt_to_bus(io_tlb_end - 1) <= mask;
}
EXPORT_SYMBOL(swiotlb_init);
......@@ -906,4 +790,6 @@ EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_device);
EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu);
EXPORT_SYMBOL(swiotlb_sync_sg_for_device);
EXPORT_SYMBOL(swiotlb_dma_mapping_error);
EXPORT_SYMBOL(swiotlb_alloc_coherent);
EXPORT_SYMBOL(swiotlb_free_coherent);
EXPORT_SYMBOL(swiotlb_dma_supported);
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