Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge branch 'iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse source 
* 'iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (60 commits)
  dma-debug: make memory range checks more consistent
  dma-debug: warn of unmapping an invalid dma address
  dma-debug: fix dma_debug_add_bus() definition for !CONFIG_DMA_API_DEBUG
  dma-debug/x86: register pci bus for dma-debug leak detection
  dma-debug: add a check dma memory leaks
  dma-debug: add checks for kernel text and rodata
  dma-debug: print stacktrace of mapping path on unmap error
  dma-debug: Documentation update
  dma-debug: x86 architecture bindings
  dma-debug: add function to dump dma mappings
  dma-debug: add checks for sync_single_sg_*
  dma-debug: add checks for sync_single_range_*
  dma-debug: add checks for sync_single_*
  dma-debug: add checking for [alloc|free]_coherent
  dma-debug: add add checking for map/unmap_sg
  dma-debug: add checking for map/unmap_page/single
  dma-debug: add core checking functions
  dma-debug: add debugfs interface
  dma-debug: add kernel command line parameters
  dma-debug: add initialization code
  ...

Fix trivial conflicts due to whitespace changes in arch/x86/kernel/pci-nommu.c
This commit is contained in:
Linus Torvalds 2009-03-30 13:41:00 -07:00
commit 712b0006bf
40 changed files with 1906 additions and 851 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

106
Documentation/DMA-API.txt
View file

@ -609,3 +609,109 @@ size is the size (and should be a page-sized multiple).
The return value will be either a pointer to the processor virtual
address of the memory, or an error (via PTR_ERR()) if any part of the
region is occupied.
Part III - Debug drivers use of the DMA-API
-------------------------------------------
The DMA-API as described above as some constraints. DMA addresses must be
released with the corresponding function with the same size for example. With
the advent of hardware IOMMUs it becomes more and more important that drivers
do not violate those constraints. In the worst case such a violation can
result in data corruption up to destroyed filesystems.
To debug drivers and find bugs in the usage of the DMA-API checking code can
be compiled into the kernel which will tell the developer about those
violations. If your architecture supports it you can select the "Enable
debugging of DMA-API usage" option in your kernel configuration. Enabling this
option has a performance impact. Do not enable it in production kernels.
If you boot the resulting kernel will contain code which does some bookkeeping
about what DMA memory was allocated for which device. If this code detects an
error it prints a warning message with some details into your kernel log. An
example warning message may look like this:
------------[ cut here ]------------
WARNING: at /data2/repos/linux-2.6-iommu/lib/dma-debug.c:448
check_unmap+0x203/0x490()
Hardware name:
forcedeth 0000:00:08.0: DMA-API: device driver frees DMA memory with wrong
function [device address=0x00000000640444be] [size=66 bytes] [mapped as
single] [unmapped as page]
Modules linked in: nfsd exportfs bridge stp llc r8169
Pid: 0, comm: swapper Tainted: G W 2.6.28-dmatest-09289-g8bb99c0 #1
Call Trace:
<IRQ> [<ffffffff80240b22>] warn_slowpath+0xf2/0x130
[<ffffffff80647b70>] _spin_unlock+0x10/0x30
[<ffffffff80537e75>] usb_hcd_link_urb_to_ep+0x75/0xc0
[<ffffffff80647c22>] _spin_unlock_irqrestore+0x12/0x40
[<ffffffff8055347f>] ohci_urb_enqueue+0x19f/0x7c0
[<ffffffff80252f96>] queue_work+0x56/0x60
[<ffffffff80237e10>] enqueue_task_fair+0x20/0x50
[<ffffffff80539279>] usb_hcd_submit_urb+0x379/0xbc0
[<ffffffff803b78c3>] cpumask_next_and+0x23/0x40
[<ffffffff80235177>] find_busiest_group+0x207/0x8a0
[<ffffffff8064784f>] _spin_lock_irqsave+0x1f/0x50
[<ffffffff803c7ea3>] check_unmap+0x203/0x490
[<ffffffff803c8259>] debug_dma_unmap_page+0x49/0x50
[<ffffffff80485f26>] nv_tx_done_optimized+0xc6/0x2c0
[<ffffffff80486c13>] nv_nic_irq_optimized+0x73/0x2b0
[<ffffffff8026df84>] handle_IRQ_event+0x34/0x70
[<ffffffff8026ffe9>] handle_edge_irq+0xc9/0x150
[<ffffffff8020e3ab>] do_IRQ+0xcb/0x1c0
[<ffffffff8020c093>] ret_from_intr+0x0/0xa
<EOI> <4>---[ end trace f6435a98e2a38c0e ]---
The driver developer can find the driver and the device including a stacktrace
of the DMA-API call which caused this warning.
Per default only the first error will result in a warning message. All other
errors will only silently counted. This limitation exist to prevent the code
from flooding your kernel log. To support debugging a device driver this can
be disabled via debugfs. See the debugfs interface documentation below for
details.
The debugfs directory for the DMA-API debugging code is called dma-api/. In
this directory the following files can currently be found:
dma-api/all_errors This file contains a numeric value. If this
value is not equal to zero the debugging code
will print a warning for every error it finds
into the kernel log. Be carefull with this
option. It can easily flood your logs.
dma-api/disabled This read-only file contains the character 'Y'
if the debugging code is disabled. This can
happen when it runs out of memory or if it was
disabled at boot time
dma-api/error_count This file is read-only and shows the total
numbers of errors found.
dma-api/num_errors The number in this file shows how many
warnings will be printed to the kernel log
before it stops. This number is initialized to
one at system boot and be set by writing into
this file
dma-api/min_free_entries
This read-only file can be read to get the
minimum number of free dma_debug_entries the
allocator has ever seen. If this value goes
down to zero the code will disable itself
because it is not longer reliable.
dma-api/num_free_entries
The current number of free dma_debug_entries
in the allocator.
If you have this code compiled into your kernel it will be enabled by default.
If you want to boot without the bookkeeping anyway you can provide
'dma_debug=off' as a boot parameter. This will disable DMA-API debugging.
Notice that you can not enable it again at runtime. You have to reboot to do
so.
When the code disables itself at runtime this is most likely because it ran
out of dma_debug_entries. These entries are preallocated at boot. The number
of preallocated entries is defined per architecture. If it is too low for you
boot with 'dma_debug_entries=<your_desired_number>' to overwrite the
architectural default.

10
Documentation/kernel-parameters.txt
View file

@ -492,6 +492,16 @@ and is between 256 and 4096 characters. It is defined in the file
Range: 0 - 8192
Default: 64
dma_debug=off If the kernel is compiled with DMA_API_DEBUG support
this option disables the debugging code at boot.
dma_debug_entries=<number>
This option allows to tune the number of preallocated
entries for DMA-API debugging code. One entry is
required per DMA-API allocation. Use this if the
DMA-API debugging code disables itself because the
architectural default is too low.
hpet= [X86-32,HPET] option to control HPET usage
Format: { enable (default) | disable | force |
verbose }

2
arch/Kconfig
View file

@ -106,3 +106,5 @@ config HAVE_CLK
The <linux/clk.h> calls support software clock gating and
thus are a key power management tool on many systems.
config HAVE_DMA_API_DEBUG
bool

4
arch/ia64/dig/Makefile
View file

@ -7,8 +7,8 @@
obj-y := setup.o
ifeq ($(CONFIG_DMAR), y)
obj-$(CONFIG_IA64_GENERIC) += machvec.o machvec_vtd.o dig_vtd_iommu.o
obj-$(CONFIG_IA64_GENERIC) += machvec.o machvec_vtd.o
else
obj-$(CONFIG_IA64_GENERIC) += machvec.o
endif
obj-$(CONFIG_IA64_DIG_VTD) += dig_vtd_iommu.o

59
arch/ia64/dig/dig_vtd_iommu.c
View file

@ -1,59 +0,0 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/intel-iommu.h>
void *
vtd_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t flags)
{
return intel_alloc_coherent(dev, size, dma_handle, flags);
}
EXPORT_SYMBOL_GPL(vtd_alloc_coherent);
void
vtd_free_coherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
intel_free_coherent(dev, size, vaddr, dma_handle);
}
EXPORT_SYMBOL_GPL(vtd_free_coherent);
dma_addr_t
vtd_map_single_attrs(struct device *dev, void *addr, size_t size,
int dir, struct dma_attrs *attrs)
{
return intel_map_single(dev, (phys_addr_t)addr, size, dir);
}
EXPORT_SYMBOL_GPL(vtd_map_single_attrs);
void
vtd_unmap_single_attrs(struct device *dev, dma_addr_t iova, size_t size,
int dir, struct dma_attrs *attrs)
{
intel_unmap_single(dev, iova, size, dir);
}
EXPORT_SYMBOL_GPL(vtd_unmap_single_attrs);
int
vtd_map_sg_attrs(struct device *dev, struct scatterlist *sglist, int nents,
int dir, struct dma_attrs *attrs)
{
return intel_map_sg(dev, sglist, nents, dir);
}
EXPORT_SYMBOL_GPL(vtd_map_sg_attrs);
void
vtd_unmap_sg_attrs(struct device *dev, struct scatterlist *sglist,
int nents, int dir, struct dma_attrs *attrs)
{
intel_unmap_sg(dev, sglist, nents, dir);
}
EXPORT_SYMBOL_GPL(vtd_unmap_sg_attrs);
int
vtd_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
EXPORT_SYMBOL_GPL(vtd_dma_mapping_error);

165
arch/ia64/hp/common/hwsw_iommu.c
View file

@ -13,49 +13,34 @@
*/
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/swiotlb.h>
#include <asm/machvec.h>
extern struct dma_map_ops sba_dma_ops, swiotlb_dma_ops;
/* swiotlb declarations & definitions: */
extern int swiotlb_late_init_with_default_size (size_t size);
/* hwiommu declarations & definitions: */
extern ia64_mv_dma_alloc_coherent sba_alloc_coherent;
extern ia64_mv_dma_free_coherent sba_free_coherent;
extern ia64_mv_dma_map_single_attrs sba_map_single_attrs;
extern ia64_mv_dma_unmap_single_attrs sba_unmap_single_attrs;
extern ia64_mv_dma_map_sg_attrs sba_map_sg_attrs;
extern ia64_mv_dma_unmap_sg_attrs sba_unmap_sg_attrs;
extern ia64_mv_dma_supported sba_dma_supported;
extern ia64_mv_dma_mapping_error sba_dma_mapping_error;
#define hwiommu_alloc_coherent sba_alloc_coherent
#define hwiommu_free_coherent sba_free_coherent
#define hwiommu_map_single_attrs sba_map_single_attrs
#define hwiommu_unmap_single_attrs sba_unmap_single_attrs
#define hwiommu_map_sg_attrs sba_map_sg_attrs
#define hwiommu_unmap_sg_attrs sba_unmap_sg_attrs
#define hwiommu_dma_supported sba_dma_supported
#define hwiommu_dma_mapping_error sba_dma_mapping_error
#define hwiommu_sync_single_for_cpu machvec_dma_sync_single
#define hwiommu_sync_sg_for_cpu machvec_dma_sync_sg
#define hwiommu_sync_single_for_device machvec_dma_sync_single
#define hwiommu_sync_sg_for_device machvec_dma_sync_sg
/*
* Note: we need to make the determination of whether or not to use
* the sw I/O TLB based purely on the device structure. Anything else
* would be unreliable or would be too intrusive.
*/
static inline int
use_swiotlb (struct device *dev)
static inline int use_swiotlb(struct device *dev)
{
return dev && dev->dma_mask && !hwiommu_dma_supported(dev, *dev->dma_mask);
return dev && dev->dma_mask &&
!sba_dma_ops.dma_supported(dev, *dev->dma_mask);
}
struct dma_map_ops *hwsw_dma_get_ops(struct device *dev)
{
if (use_swiotlb(dev))
return &swiotlb_dma_ops;
return &sba_dma_ops;
}
EXPORT_SYMBOL(hwsw_dma_get_ops);
void __init
hwsw_init (void)
{
@ -71,125 +56,3 @@ hwsw_init (void)
#endif
}
}
void *
hwsw_alloc_coherent (struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flags)
{
if (use_swiotlb(dev))
return swiotlb_alloc_coherent(dev, size, dma_handle, flags);
else
return hwiommu_alloc_coherent(dev, size, dma_handle, flags);
}
void
hwsw_free_coherent (struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle)
{
if (use_swiotlb(dev))
swiotlb_free_coherent(dev, size, vaddr, dma_handle);
else
hwiommu_free_coherent(dev, size, vaddr, dma_handle);
}
dma_addr_t
hwsw_map_single_attrs(struct device *dev, void *addr, size_t size, int dir,
struct dma_attrs *attrs)
{
if (use_swiotlb(dev))
return swiotlb_map_single_attrs(dev, addr, size, dir, attrs);
else
return hwiommu_map_single_attrs(dev, addr, size, dir, attrs);
}
EXPORT_SYMBOL(hwsw_map_single_attrs);
void
hwsw_unmap_single_attrs(struct device *dev, dma_addr_t iova, size_t size,
int dir, struct dma_attrs *attrs)
{
if (use_swiotlb(dev))
return swiotlb_unmap_single_attrs(dev, iova, size, dir, attrs);
else
return hwiommu_unmap_single_attrs(dev, iova, size, dir, attrs);
}
EXPORT_SYMBOL(hwsw_unmap_single_attrs);
int
hwsw_map_sg_attrs(struct device *dev, struct scatterlist *sglist, int nents,
int dir, struct dma_attrs *attrs)
{
if (use_swiotlb(dev))
return swiotlb_map_sg_attrs(dev, sglist, nents, dir, attrs);
else
return hwiommu_map_sg_attrs(dev, sglist, nents, dir, attrs);
}
EXPORT_SYMBOL(hwsw_map_sg_attrs);
void
hwsw_unmap_sg_attrs(struct device *dev, struct scatterlist *sglist, int nents,
int dir, struct dma_attrs *attrs)
{
if (use_swiotlb(dev))
return swiotlb_unmap_sg_attrs(dev, sglist, nents, dir, attrs);
else
return hwiommu_unmap_sg_attrs(dev, sglist, nents, dir, attrs);
}
EXPORT_SYMBOL(hwsw_unmap_sg_attrs);
void
hwsw_sync_single_for_cpu (struct device *dev, dma_addr_t addr, size_t size, int dir)
{
if (use_swiotlb(dev))
swiotlb_sync_single_for_cpu(dev, addr, size, dir);
else
hwiommu_sync_single_for_cpu(dev, addr, size, dir);
}
void
hwsw_sync_sg_for_cpu (struct device *dev, struct scatterlist *sg, int nelems, int dir)
{
if (use_swiotlb(dev))
swiotlb_sync_sg_for_cpu(dev, sg, nelems, dir);
else
hwiommu_sync_sg_for_cpu(dev, sg, nelems, dir);
}
void
hwsw_sync_single_for_device (struct device *dev, dma_addr_t addr, size_t size, int dir)
{
if (use_swiotlb(dev))
swiotlb_sync_single_for_device(dev, addr, size, dir);
else
hwiommu_sync_single_for_device(dev, addr, size, dir);
}
void
hwsw_sync_sg_for_device (struct device *dev, struct scatterlist *sg, int nelems, int dir)
{
if (use_swiotlb(dev))
swiotlb_sync_sg_for_device(dev, sg, nelems, dir);
else
hwiommu_sync_sg_for_device(dev, sg, nelems, dir);
}
int
hwsw_dma_supported (struct device *dev, u64 mask)
{
if (hwiommu_dma_supported(dev, mask))
return 1;
return swiotlb_dma_supported(dev, mask);
}
int
hwsw_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return hwiommu_dma_mapping_error(dev, dma_addr) ||
swiotlb_dma_mapping_error(dev, dma_addr);
}
EXPORT_SYMBOL(hwsw_dma_mapping_error);
EXPORT_SYMBOL(hwsw_dma_supported);
EXPORT_SYMBOL(hwsw_alloc_coherent);
EXPORT_SYMBOL(hwsw_free_coherent);
EXPORT_SYMBOL(hwsw_sync_single_for_cpu);
EXPORT_SYMBOL(hwsw_sync_single_for_device);
EXPORT_SYMBOL(hwsw_sync_sg_for_cpu);
EXPORT_SYMBOL(hwsw_sync_sg_for_device);

79
arch/ia64/hp/common/sba_iommu.c
View file

@ -36,6 +36,7 @@
#include <linux/bitops.h> /* hweight64() */
#include <linux/crash_dump.h>
#include <linux/iommu-helper.h>
#include <linux/dma-mapping.h>
#include <asm/delay.h> /* ia64_get_itc() */
#include <asm/io.h>
@ -908,11 +909,13 @@ sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt)
*
* See Documentation/PCI/PCI-DMA-mapping.txt
*/
dma_addr_t
sba_map_single_attrs(struct device *dev, void *addr, size_t size, int dir,
struct dma_attrs *attrs)
static dma_addr_t sba_map_page(struct device *dev, struct page *page,
unsigned long poff, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct ioc *ioc;
void *addr = page_address(page) + poff;
dma_addr_t iovp;
dma_addr_t offset;
u64 *pdir_start;
@ -990,7 +993,14 @@ sba_map_single_attrs(struct device *dev, void *addr, size_t size, int dir,
#endif
return SBA_IOVA(ioc, iovp, offset);
}
EXPORT_SYMBOL(sba_map_single_attrs);
static dma_addr_t sba_map_single_attrs(struct device *dev, void *addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
return sba_map_page(dev, virt_to_page(addr),
(unsigned long)addr & ~PAGE_MASK, size, dir, attrs);
}
#ifdef ENABLE_MARK_CLEAN
static SBA_INLINE void
@ -1026,8 +1036,8 @@ sba_mark_clean(struct ioc *ioc, dma_addr_t iova, size_t size)
*
* See Documentation/PCI/PCI-DMA-mapping.txt
*/
void sba_unmap_single_attrs(struct device *dev, dma_addr_t iova, size_t size,
int dir, struct dma_attrs *attrs)
static void sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
struct ioc *ioc;
#if DELAYED_RESOURCE_CNT > 0
@ -1094,7 +1104,12 @@ void sba_unmap_single_attrs(struct device *dev, dma_addr_t iova, size_t size,
spin_unlock_irqrestore(&ioc->res_lock, flags);
#endif /* DELAYED_RESOURCE_CNT == 0 */
}
EXPORT_SYMBOL(sba_unmap_single_attrs);
void sba_unmap_single_attrs(struct device *dev, dma_addr_t iova, size_t size,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
sba_unmap_page(dev, iova, size, dir, attrs);
}
/**
* sba_alloc_coherent - allocate/map shared mem for DMA
@ -1104,7 +1119,7 @@ EXPORT_SYMBOL(sba_unmap_single_attrs);
*
* See Documentation/PCI/PCI-DMA-mapping.txt
*/
void *
static void *
sba_alloc_coherent (struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flags)
{
struct ioc *ioc;
@ -1167,7 +1182,8 @@ sba_alloc_coherent (struct device *dev, size_t size, dma_addr_t *dma_handle, gfp
*
* See Documentation/PCI/PCI-DMA-mapping.txt
*/
void sba_free_coherent (struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle)
static void sba_free_coherent (struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
sba_unmap_single_attrs(dev, dma_handle, size, 0, NULL);
free_pages((unsigned long) vaddr, get_order(size));
@ -1422,8 +1438,9 @@ sba_coalesce_chunks(struct ioc *ioc, struct device *dev,
*
* See Documentation/PCI/PCI-DMA-mapping.txt
*/
int sba_map_sg_attrs(struct device *dev, struct scatterlist *sglist, int nents,
int dir, struct dma_attrs *attrs)
static int sba_map_sg_attrs(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct ioc *ioc;
int coalesced, filled = 0;
@ -1502,7 +1519,6 @@ int sba_map_sg_attrs(struct device *dev, struct scatterlist *sglist, int nents,
return filled;
}
EXPORT_SYMBOL(sba_map_sg_attrs);
/**
* sba_unmap_sg_attrs - unmap Scatter/Gather list
@ -1514,8 +1530,9 @@ EXPORT_SYMBOL(sba_map_sg_attrs);
*
* See Documentation/PCI/PCI-DMA-mapping.txt
*/
void sba_unmap_sg_attrs(struct device *dev, struct scatterlist *sglist,
int nents, int dir, struct dma_attrs *attrs)
static void sba_unmap_sg_attrs(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
#ifdef ASSERT_PDIR_SANITY
struct ioc *ioc;
@ -1551,7 +1568,6 @@ void sba_unmap_sg_attrs(struct device *dev, struct scatterlist *sglist,
#endif
}
EXPORT_SYMBOL(sba_unmap_sg_attrs);
/**************************************************************
*
@ -2064,6 +2080,8 @@ static struct acpi_driver acpi_sba_ioc_driver = {
},
};
extern struct dma_map_ops swiotlb_dma_ops;
static int __init
sba_init(void)
{
@ -2077,6 +2095,7 @@ sba_init(void)
* a successful kdump kernel boot is to use the swiotlb.
*/
if (is_kdump_kernel()) {
dma_ops = &swiotlb_dma_ops;
if (swiotlb_late_init_with_default_size(64 * (1<<20)) != 0)
panic("Unable to initialize software I/O TLB:"
" Try machvec=dig boot option");
@ -2092,6 +2111,7 @@ sba_init(void)
* If we didn't find something sba_iommu can claim, we
* need to setup the swiotlb and switch to the dig machvec.
*/
dma_ops = &swiotlb_dma_ops;
if (swiotlb_late_init_with_default_size(64 * (1<<20)) != 0)
panic("Unable to find SBA IOMMU or initialize "
"software I/O TLB: Try machvec=dig boot option");
@ -2138,15 +2158,13 @@ nosbagart(char *str)
return 1;
}
int
sba_dma_supported (struct device *dev, u64 mask)
static int sba_dma_supported (struct device *dev, u64 mask)
{
/* make sure it's at least 32bit capable */
return ((mask & 0xFFFFFFFFUL) == 0xFFFFFFFFUL);
}
int
sba_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
static int sba_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
@ -2176,7 +2194,22 @@ sba_page_override(char *str)
__setup("sbapagesize=",sba_page_override);
EXPORT_SYMBOL(sba_dma_mapping_error);
EXPORT_SYMBOL(sba_dma_supported);
EXPORT_SYMBOL(sba_alloc_coherent);
EXPORT_SYMBOL(sba_free_coherent);
struct dma_map_ops sba_dma_ops = {
.alloc_coherent = sba_alloc_coherent,
.free_coherent = sba_free_coherent,
.map_page = sba_map_page,
.unmap_page = sba_unmap_page,
.map_sg = sba_map_sg_attrs,
.unmap_sg = sba_unmap_sg_attrs,
.sync_single_for_cpu = machvec_dma_sync_single,
.sync_sg_for_cpu = machvec_dma_sync_sg,
.sync_single_for_device = machvec_dma_sync_single,
.sync_sg_for_device = machvec_dma_sync_sg,
.dma_supported = sba_dma_supported,
.mapping_error = sba_dma_mapping_error,
};
void sba_dma_init(void)
{
dma_ops = &sba_dma_ops;
}

214
arch/ia64/include/asm/dma-mapping.h
View file

@ -11,99 +11,128 @@
#define ARCH_HAS_DMA_GET_REQUIRED_MASK
struct dma_mapping_ops {
int (*mapping_error)(struct device *dev,
dma_addr_t dma_addr);
void* (*alloc_coherent)(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
void (*free_coherent)(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
dma_addr_t (*map_single)(struct device *hwdev, unsigned long ptr,
size_t size, int direction);
void (*unmap_single)(struct device *dev, dma_addr_t addr,
size_t size, int direction);
void (*sync_single_for_cpu)(struct device *hwdev,
dma_addr_t dma_handle, size_t size,
int direction);
void (*sync_single_for_device)(struct device *hwdev,
dma_addr_t dma_handle, size_t size,
int direction);
void (*sync_single_range_for_cpu)(struct device *hwdev,
dma_addr_t dma_handle, unsigned long offset,
size_t size, int direction);
void (*sync_single_range_for_device)(struct device *hwdev,
dma_addr_t dma_handle, unsigned long offset,
size_t size, int direction);
void (*sync_sg_for_cpu)(struct device *hwdev,
struct scatterlist *sg, int nelems,
int direction);
void (*sync_sg_for_device)(struct device *hwdev,
struct scatterlist *sg, int nelems,
int direction);
int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
int nents, int direction);
void (*unmap_sg)(struct device *hwdev,
struct scatterlist *sg, int nents,
int direction);
int (*dma_supported_op)(struct device *hwdev, u64 mask);
int is_phys;
};
extern struct dma_mapping_ops *dma_ops;
extern struct dma_map_ops *dma_ops;
extern struct ia64_machine_vector ia64_mv;
extern void set_iommu_machvec(void);
#define dma_alloc_coherent(dev, size, handle, gfp) \
platform_dma_alloc_coherent(dev, size, handle, (gfp) | GFP_DMA)
extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
enum dma_data_direction);
extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
enum dma_data_direction);
/* coherent mem. is cheap */
static inline void *
dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t flag)
static inline void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *daddr, gfp_t gfp)
{
return dma_alloc_coherent(dev, size, dma_handle, flag);
struct dma_map_ops *ops = platform_dma_get_ops(dev);
return ops->alloc_coherent(dev, size, daddr, gfp);
}
#define dma_free_coherent platform_dma_free_coherent
static inline void
dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)
{
dma_free_coherent(dev, size, cpu_addr, dma_handle);
}
#define dma_map_single_attrs platform_dma_map_single_attrs
static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
size_t size, int dir)
{
return dma_map_single_attrs(dev, cpu_addr, size, dir, NULL);
}
#define dma_map_sg_attrs platform_dma_map_sg_attrs
static inline int dma_map_sg(struct device *dev, struct scatterlist *sgl,
int nents, int dir)
{
return dma_map_sg_attrs(dev, sgl, nents, dir, NULL);
}
#define dma_unmap_single_attrs platform_dma_unmap_single_attrs
static inline void dma_unmap_single(struct device *dev, dma_addr_t cpu_addr,
size_t size, int dir)
{
return dma_unmap_single_attrs(dev, cpu_addr, size, dir, NULL);
}
#define dma_unmap_sg_attrs platform_dma_unmap_sg_attrs
static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sgl,
int nents, int dir)
{
return dma_unmap_sg_attrs(dev, sgl, nents, dir, NULL);
}
#define dma_sync_single_for_cpu platform_dma_sync_single_for_cpu
#define dma_sync_sg_for_cpu platform_dma_sync_sg_for_cpu
#define dma_sync_single_for_device platform_dma_sync_single_for_device
#define dma_sync_sg_for_device platform_dma_sync_sg_for_device
#define dma_mapping_error platform_dma_mapping_error
#define dma_map_page(dev, pg, off, size, dir) \
dma_map_single(dev, page_address(pg) + (off), (size), (dir))
#define dma_unmap_page(dev, dma_addr, size, dir) \
dma_unmap_single(dev, dma_addr, size, dir)
static inline void dma_free_coherent(struct device *dev, size_t size,
void *caddr, dma_addr_t daddr)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
ops->free_coherent(dev, size, caddr, daddr);
}
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
static inline dma_addr_t dma_map_single_attrs(struct device *dev,
void *caddr, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
return ops->map_page(dev, virt_to_page(caddr),
(unsigned long)caddr & ~PAGE_MASK, size,
dir, attrs);
}
static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t daddr,
size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
ops->unmap_page(dev, daddr, size, dir, attrs);
}
#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
int nents, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
return ops->map_sg(dev, sgl, nents, dir, attrs);
}
static inline void dma_unmap_sg_attrs(struct device *dev,
struct scatterlist *sgl, int nents,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
ops->unmap_sg(dev, sgl, nents, dir, attrs);
}
#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t daddr,
size_t size,
enum dma_data_direction dir)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
ops->sync_single_for_cpu(dev, daddr, size, dir);
}
static inline void dma_sync_sg_for_cpu(struct device *dev,
struct scatterlist *sgl,
int nents, enum dma_data_direction dir)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
ops->sync_sg_for_cpu(dev, sgl, nents, dir);
}
static inline void dma_sync_single_for_device(struct device *dev,
dma_addr_t daddr,
size_t size,
enum dma_data_direction dir)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
ops->sync_single_for_device(dev, daddr, size, dir);
}
static inline void dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sgl,
int nents,
enum dma_data_direction dir)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
ops->sync_sg_for_device(dev, sgl, nents, dir);
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
return ops->mapping_error(dev, daddr);
}
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
size_t offset, size_t size,
enum dma_data_direction dir)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
return ops->map_page(dev, page, offset, size, dir, NULL);
}
static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
size_t size, enum dma_data_direction dir)
{
dma_unmap_single(dev, addr, size, dir);
}
/*
* Rest of this file is part of the "Advanced DMA API". Use at your own risk.
@ -115,7 +144,11 @@ static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sgl,
#define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir) \
dma_sync_single_for_device(dev, dma_handle, size, dir)
#define dma_supported platform_dma_supported
static inline int dma_supported(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
return ops->dma_supported(dev, mask);
}
static inline int
dma_set_mask (struct device *dev, u64 mask)
@ -141,11 +174,4 @@ dma_cache_sync (struct device *dev, void *vaddr, size_t size,
#define dma_is_consistent(d, h) (1) /* all we do is coherent memory... */
static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
{
return dma_ops;
}
#endif /* _ASM_IA64_DMA_MAPPING_H */

102
arch/ia64/include/asm/machvec.h
View file

@ -11,7 +11,6 @@
#define _ASM_IA64_MACHVEC_H
#include <linux/types.h>
#include <linux/swiotlb.h>
/* forward declarations: */
struct device;
@ -45,24 +44,8 @@ typedef void ia64_mv_kernel_launch_event_t(void);
/* DMA-mapping interface: */
typedef void ia64_mv_dma_init (void);
typedef void *ia64_mv_dma_alloc_coherent (struct device *, size_t, dma_addr_t *, gfp_t);
typedef void ia64_mv_dma_free_coherent (struct device *, size_t, void *, dma_addr_t);
typedef dma_addr_t ia64_mv_dma_map_single (struct device *, void *, size_t, int);
typedef void ia64_mv_dma_unmap_single (struct device *, dma_addr_t, size_t, int);
typedef int ia64_mv_dma_map_sg (struct device *, struct scatterlist *, int, int);
typedef void ia64_mv_dma_unmap_sg (struct device *, struct scatterlist *, int, int);
typedef void ia64_mv_dma_sync_single_for_cpu (struct device *, dma_addr_t, size_t, int);
typedef void ia64_mv_dma_sync_sg_for_cpu (struct device *, struct scatterlist *, int, int);
typedef void ia64_mv_dma_sync_single_for_device (struct device *, dma_addr_t, size_t, int);
typedef void ia64_mv_dma_sync_sg_for_device (struct device *, struct scatterlist *, int, int);
typedef int ia64_mv_dma_mapping_error(struct device *, dma_addr_t dma_addr);
typedef int ia64_mv_dma_supported (struct device *, u64);
typedef dma_addr_t ia64_mv_dma_map_single_attrs (struct device *, void *, size_t, int, struct dma_attrs *);
typedef void ia64_mv_dma_unmap_single_attrs (struct device *, dma_addr_t, size_t, int, struct dma_attrs *);
typedef int ia64_mv_dma_map_sg_attrs (struct device *, struct scatterlist *, int, int, struct dma_attrs *);
typedef void ia64_mv_dma_unmap_sg_attrs (struct device *, struct scatterlist *, int, int, struct dma_attrs *);
typedef u64 ia64_mv_dma_get_required_mask (struct device *);
typedef struct dma_map_ops *ia64_mv_dma_get_ops(struct device *);
/*
* WARNING: The legacy I/O space is _architected_. Platforms are
@ -114,8 +97,6 @@ machvec_noop_bus (struct pci_bus *bus)
extern void machvec_setup (char **);
extern void machvec_timer_interrupt (int, void *);
extern void machvec_dma_sync_single (struct device *, dma_addr_t, size_t, int);
extern void machvec_dma_sync_sg (struct device *, struct scatterlist *, int, int);
extern void machvec_tlb_migrate_finish (struct mm_struct *);
# if defined (CONFIG_IA64_HP_SIM)
@ -148,19 +129,8 @@ extern void machvec_tlb_migrate_finish (struct mm_struct *);
# define platform_global_tlb_purge ia64_mv.global_tlb_purge
# define platform_tlb_migrate_finish ia64_mv.tlb_migrate_finish
# define platform_dma_init ia64_mv.dma_init
# define platform_dma_alloc_coherent ia64_mv.dma_alloc_coherent
# define platform_dma_free_coherent ia64_mv.dma_free_coherent
# define platform_dma_map_single_attrs ia64_mv.dma_map_single_attrs
# define platform_dma_unmap_single_attrs ia64_mv.dma_unmap_single_attrs
# define platform_dma_map_sg_attrs ia64_mv.dma_map_sg_attrs
# define platform_dma_unmap_sg_attrs ia64_mv.dma_unmap_sg_attrs
# define platform_dma_sync_single_for_cpu ia64_mv.dma_sync_single_for_cpu
# define platform_dma_sync_sg_for_cpu ia64_mv.dma_sync_sg_for_cpu
# define platform_dma_sync_single_for_device ia64_mv.dma_sync_single_for_device
# define platform_dma_sync_sg_for_device ia64_mv.dma_sync_sg_for_device
# define platform_dma_mapping_error ia64_mv.dma_mapping_error
# define platform_dma_supported ia64_mv.dma_supported
# define platform_dma_get_required_mask ia64_mv.dma_get_required_mask
# define platform_dma_get_ops ia64_mv.dma_get_ops
# define platform_irq_to_vector ia64_mv.irq_to_vector
# define platform_local_vector_to_irq ia64_mv.local_vector_to_irq
# define platform_pci_get_legacy_mem ia64_mv.pci_get_legacy_mem
@ -203,19 +173,8 @@ struct ia64_machine_vector {
ia64_mv_global_tlb_purge_t *global_tlb_purge;
ia64_mv_tlb_migrate_finish_t *tlb_migrate_finish;
ia64_mv_dma_init *dma_init;
ia64_mv_dma_alloc_coherent *dma_alloc_coherent;
ia64_mv_dma_free_coherent *dma_free_coherent;
ia64_mv_dma_map_single_attrs *dma_map_single_attrs;
ia64_mv_dma_unmap_single_attrs *dma_unmap_single_attrs;
ia64_mv_dma_map_sg_attrs *dma_map_sg_attrs;
ia64_mv_dma_unmap_sg_attrs *dma_unmap_sg_attrs;
ia64_mv_dma_sync_single_for_cpu *dma_sync_single_for_cpu;
ia64_mv_dma_sync_sg_for_cpu *dma_sync_sg_for_cpu;
ia64_mv_dma_sync_single_for_device *dma_sync_single_for_device;
ia64_mv_dma_sync_sg_for_device *dma_sync_sg_for_device;
ia64_mv_dma_mapping_error *dma_mapping_error;
ia64_mv_dma_supported *dma_supported;
ia64_mv_dma_get_required_mask *dma_get_required_mask;
ia64_mv_dma_get_ops *dma_get_ops;
ia64_mv_irq_to_vector *irq_to_vector;
ia64_mv_local_vector_to_irq *local_vector_to_irq;
ia64_mv_pci_get_legacy_mem_t *pci_get_legacy_mem;
@ -254,19 +213,8 @@ struct ia64_machine_vector {
platform_global_tlb_purge, \
platform_tlb_migrate_finish, \
platform_dma_init, \
platform_dma_alloc_coherent, \
platform_dma_free_coherent, \
platform_dma_map_single_attrs, \
platform_dma_unmap_single_attrs, \
platform_dma_map_sg_attrs, \
platform_dma_unmap_sg_attrs, \
platform_dma_sync_single_for_cpu, \
platform_dma_sync_sg_for_cpu, \
platform_dma_sync_single_for_device, \
platform_dma_sync_sg_for_device, \
platform_dma_mapping_error, \
platform_dma_supported, \
platform_dma_get_required_mask, \
platform_dma_get_ops, \
platform_irq_to_vector, \
platform_local_vector_to_irq, \
platform_pci_get_legacy_mem, \
@ -302,6 +250,9 @@ extern void machvec_init_from_cmdline(const char *cmdline);
# error Unknown configuration. Update arch/ia64/include/asm/machvec.h.
# endif /* CONFIG_IA64_GENERIC */
extern void swiotlb_dma_init(void);
extern struct dma_map_ops *dma_get_ops(struct device *);
/*
* Define default versions so we can extend machvec for new platforms without having
* to update the machvec files for all existing platforms.
@ -332,43 +283,10 @@ extern void machvec_init_from_cmdline(const char *cmdline);
# define platform_kernel_launch_event machvec_noop
#endif
#ifndef platform_dma_init
# define platform_dma_init swiotlb_init
# define platform_dma_init swiotlb_dma_init
#endif
#ifndef platform_dma_alloc_coherent
# define platform_dma_alloc_coherent swiotlb_alloc_coherent
#endif
#ifndef platform_dma_free_coherent
# define platform_dma_free_coherent swiotlb_free_coherent
#endif
#ifndef platform_dma_map_single_attrs
# define platform_dma_map_single_attrs swiotlb_map_single_attrs
#endif
#ifndef platform_dma_unmap_single_attrs
# define platform_dma_unmap_single_attrs swiotlb_unmap_single_attrs
#endif
#ifndef platform_dma_map_sg_attrs
# define platform_dma_map_sg_attrs swiotlb_map_sg_attrs
#endif
#ifndef platform_dma_unmap_sg_attrs
# define platform_dma_unmap_sg_attrs swiotlb_unmap_sg_attrs
#endif
#ifndef platform_dma_sync_single_for_cpu
# define platform_dma_sync_single_for_cpu swiotlb_sync_single_for_cpu
#endif
#ifndef platform_dma_sync_sg_for_cpu
# define platform_dma_sync_sg_for_cpu swiotlb_sync_sg_for_cpu
#endif
#ifndef platform_dma_sync_single_for_device
# define platform_dma_sync_single_for_device swiotlb_sync_single_for_device
#endif
#ifndef platform_dma_sync_sg_for_device
# define platform_dma_sync_sg_for_device swiotlb_sync_sg_for_device
#endif
#ifndef platform_dma_mapping_error
# define platform_dma_mapping_error swiotlb_dma_mapping_error
#endif
#ifndef platform_dma_supported
# define platform_dma_supported swiotlb_dma_supported
#ifndef platform_dma_get_ops
# define platform_dma_get_ops dma_get_ops
#endif
#ifndef platform_dma_get_required_mask
# define platform_dma_get_required_mask ia64_dma_get_required_mask

20
arch/ia64/include/asm/machvec_dig_vtd.h
View file

@ -2,14 +2,6 @@
#define _ASM_IA64_MACHVEC_DIG_VTD_h
extern ia64_mv_setup_t dig_setup;
extern ia64_mv_dma_alloc_coherent vtd_alloc_coherent;
extern ia64_mv_dma_free_coherent vtd_free_coherent;
extern ia64_mv_dma_map_single_attrs vtd_map_single_attrs;
extern ia64_mv_dma_unmap_single_attrs vtd_unmap_single_attrs;
extern ia64_mv_dma_map_sg_attrs vtd_map_sg_attrs;
extern ia64_mv_dma_unmap_sg_attrs vtd_unmap_sg_attrs;
extern ia64_mv_dma_supported iommu_dma_supported;
extern ia64_mv_dma_mapping_error vtd_dma_mapping_error;
extern ia64_mv_dma_init pci_iommu_alloc;
/*
@ -22,17 +14,5 @@ extern ia64_mv_dma_init pci_iommu_alloc;
#define platform_name "dig_vtd"
#define platform_setup dig_setup
#define platform_dma_init pci_iommu_alloc
#define platform_dma_alloc_coherent vtd_alloc_coherent
#define platform_dma_free_coherent vtd_free_coherent
#define platform_dma_map_single_attrs vtd_map_single_attrs
#define platform_dma_unmap_single_attrs vtd_unmap_single_attrs
#define platform_dma_map_sg_attrs vtd_map_sg_attrs
#define platform_dma_unmap_sg_attrs vtd_unmap_sg_attrs
#define platform_dma_sync_single_for_cpu machvec_dma_sync_single
#define platform_dma_sync_sg_for_cpu machvec_dma_sync_sg
#define platform_dma_sync_single_for_device machvec_dma_sync_single
#define platform_dma_sync_sg_for_device machvec_dma_sync_sg
#define platform_dma_supported iommu_dma_supported
#define platform_dma_mapping_error vtd_dma_mapping_error
#endif /* _ASM_IA64_MACHVEC_DIG_VTD_h */

23
arch/ia64/include/asm/machvec_hpzx1.h
View file

@ -2,14 +2,7 @@
#define _ASM_IA64_MACHVEC_HPZX1_h
extern ia64_mv_setup_t dig_setup;
extern ia64_mv_dma_alloc_coherent sba_alloc_coherent;
extern ia64_mv_dma_free_coherent sba_free_coherent;
extern ia64_mv_dma_map_single_attrs sba_map_single_attrs;
extern ia64_mv_dma_unmap_single_attrs sba_unmap_single_attrs;
extern ia64_mv_dma_map_sg_attrs sba_map_sg_attrs;
extern ia64_mv_dma_unmap_sg_attrs sba_unmap_sg_attrs;
extern ia64_mv_dma_supported sba_dma_supported;
extern ia64_mv_dma_mapping_error sba_dma_mapping_error;
extern ia64_mv_dma_init sba_dma_init;
/*
* This stuff has dual use!
@ -20,18 +13,6 @@ extern ia64_mv_dma_mapping_error sba_dma_mapping_error;
*/
#define platform_name "hpzx1"
#define platform_setup dig_setup
#define platform_dma_init machvec_noop
#define platform_dma_alloc_coherent sba_alloc_coherent
#define platform_dma_free_coherent sba_free_coherent
#define platform_dma_map_single_attrs sba_map_single_attrs
#define platform_dma_unmap_single_attrs sba_unmap_single_attrs
#define platform_dma_map_sg_attrs sba_map_sg_attrs
#define platform_dma_unmap_sg_attrs sba_unmap_sg_attrs
#define platform_dma_sync_single_for_cpu machvec_dma_sync_single
#define platform_dma_sync_sg_for_cpu machvec_dma_sync_sg
#define platform_dma_sync_single_for_device machvec_dma_sync_single
#define platform_dma_sync_sg_for_device machvec_dma_sync_sg
#define platform_dma_supported sba_dma_supported
#define platform_dma_mapping_error sba_dma_mapping_error
#define platform_dma_init sba_dma_init
#endif /* _ASM_IA64_MACHVEC_HPZX1_h */

27
arch/ia64/include/asm/machvec_hpzx1_swiotlb.h
View file

@ -2,18 +2,7 @@
#define _ASM_IA64_MACHVEC_HPZX1_SWIOTLB_h
extern ia64_mv_setup_t dig_setup;
extern ia64_mv_dma_alloc_coherent hwsw_alloc_coherent;
extern ia64_mv_dma_free_coherent hwsw_free_coherent;
extern ia64_mv_dma_map_single_attrs hwsw_map_single_attrs;
extern ia64_mv_dma_unmap_single_attrs hwsw_unmap_single_attrs;
extern ia64_mv_dma_map_sg_attrs hwsw_map_sg_attrs;
extern ia64_mv_dma_unmap_sg_attrs hwsw_unmap_sg_attrs;
extern ia64_mv_dma_supported hwsw_dma_supported;
extern ia64_mv_dma_mapping_error hwsw_dma_mapping_error;
extern ia64_mv_dma_sync_single_for_cpu hwsw_sync_single_for_cpu;
extern ia64_mv_dma_sync_sg_for_cpu hwsw_sync_sg_for_cpu;
extern ia64_mv_dma_sync_single_for_device hwsw_sync_single_for_device;
extern ia64_mv_dma_sync_sg_for_device hwsw_sync_sg_for_device;
extern ia64_mv_dma_get_ops hwsw_dma_get_ops;
/*
* This stuff has dual use!
@ -23,20 +12,8 @@ extern ia64_mv_dma_sync_sg_for_device hwsw_sync_sg_for_device;
* the macros are used directly.
*/
#define platform_name "hpzx1_swiotlb"
#define platform_setup dig_setup
#define platform_dma_init machvec_noop
#define platform_dma_alloc_coherent hwsw_alloc_coherent
#define platform_dma_free_coherent hwsw_free_coherent
#define platform_dma_map_single_attrs hwsw_map_single_attrs
#define platform_dma_unmap_single_attrs hwsw_unmap_single_attrs
#define platform_dma_map_sg_attrs hwsw_map_sg_attrs
#define platform_dma_unmap_sg_attrs hwsw_unmap_sg_attrs
#define platform_dma_supported hwsw_dma_supported
#define platform_dma_mapping_error hwsw_dma_mapping_error
#define platform_dma_sync_single_for_cpu hwsw_sync_single_for_cpu
#define platform_dma_sync_sg_for_cpu hwsw_sync_sg_for_cpu
#define platform_dma_sync_single_for_device hwsw_sync_single_for_device
#define platform_dma_sync_sg_for_device hwsw_sync_sg_for_device
#define platform_dma_get_ops hwsw_dma_get_ops
#endif /* _ASM_IA64_MACHVEC_HPZX1_SWIOTLB_h */

27
arch/ia64/include/asm/machvec_sn2.h
View file

@ -55,19 +55,8 @@ extern ia64_mv_readb_t __sn_readb_relaxed;
extern ia64_mv_readw_t __sn_readw_relaxed;
extern ia64_mv_readl_t __sn_readl_relaxed;
extern ia64_mv_readq_t __sn_readq_relaxed;
extern ia64_mv_dma_alloc_coherent sn_dma_alloc_coherent;
extern ia64_mv_dma_free_coherent sn_dma_free_coherent;
extern ia64_mv_dma_map_single_attrs sn_dma_map_single_attrs;
extern ia64_mv_dma_unmap_single_attrs sn_dma_unmap_single_attrs;
extern ia64_mv_dma_map_sg_attrs sn_dma_map_sg_attrs;
extern ia64_mv_dma_unmap_sg_attrs sn_dma_unmap_sg_attrs;
extern ia64_mv_dma_sync_single_for_cpu sn_dma_sync_single_for_cpu;
extern ia64_mv_dma_sync_sg_for_cpu sn_dma_sync_sg_for_cpu;
extern ia64_mv_dma_sync_single_for_device sn_dma_sync_single_for_device;
extern ia64_mv_dma_sync_sg_for_device sn_dma_sync_sg_for_device;
extern ia64_mv_dma_mapping_error sn_dma_mapping_error;
extern ia64_mv_dma_supported sn_dma_supported;
extern ia64_mv_dma_get_required_mask sn_dma_get_required_mask;
extern ia64_mv_dma_init sn_dma_init;
extern ia64_mv_migrate_t sn_migrate;
extern ia64_mv_kernel_launch_event_t sn_kernel_launch_event;
extern ia64_mv_setup_msi_irq_t sn_setup_msi_irq;
@ -111,20 +100,8 @@ extern ia64_mv_pci_fixup_bus_t sn_pci_fixup_bus;
#define platform_pci_get_legacy_mem sn_pci_get_legacy_mem
#define platform_pci_legacy_read sn_pci_legacy_read
#define platform_pci_legacy_write sn_pci_legacy_write
#define platform_dma_init machvec_noop
#define platform_dma_alloc_coherent sn_dma_alloc_coherent
#define platform_dma_free_coherent sn_dma_free_coherent
#define platform_dma_map_single_attrs sn_dma_map_single_attrs
#define platform_dma_unmap_single_attrs sn_dma_unmap_single_attrs
#define platform_dma_map_sg_attrs sn_dma_map_sg_attrs
#define platform_dma_unmap_sg_attrs sn_dma_unmap_sg_attrs
#define platform_dma_sync_single_for_cpu sn_dma_sync_single_for_cpu
#define platform_dma_sync_sg_for_cpu sn_dma_sync_sg_for_cpu
#define platform_dma_sync_single_for_device sn_dma_sync_single_for_device
#define platform_dma_sync_sg_for_device sn_dma_sync_sg_for_device
#define platform_dma_mapping_error sn_dma_mapping_error
#define platform_dma_supported sn_dma_supported
#define platform_dma_get_required_mask sn_dma_get_required_mask
#define platform_dma_init sn_dma_init
#define platform_migrate sn_migrate
#define platform_kernel_launch_event sn_kernel_launch_event
#ifdef CONFIG_PCI_MSI

4
arch/ia64/kernel/Makefile
View file

@ -7,7 +7,7 @@ extra-y := head.o init_task.o vmlinux.lds
obj-y := acpi.o entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o \
irq_lsapic.o ivt.o machvec.o pal.o patch.o process.o perfmon.o ptrace.o sal.o \
salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
unwind.o mca.o mca_asm.o topology.o
unwind.o mca.o mca_asm.o topology.o dma-mapping.o
obj-$(CONFIG_IA64_BRL_EMU) += brl_emu.o
obj-$(CONFIG_IA64_GENERIC) += acpi-ext.o
@ -43,9 +43,7 @@ ifneq ($(CONFIG_IA64_ESI),)
obj-y += esi_stub.o # must be in kernel proper
endif
obj-$(CONFIG_DMAR) += pci-dma.o
ifeq ($(CONFIG_DMAR), y)
obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o
endif
# The gate DSO image is built using a special linker script.
targets += gate.so gate-syms.o

13
arch/ia64/kernel/dma-mapping.c Normal file
View file

@ -0,0 +1,13 @@
#include <linux/dma-mapping.h>
/* Set this to 1 if there is a HW IOMMU in the system */
int iommu_detected __read_mostly;
struct dma_map_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
struct dma_map_ops *dma_get_ops(struct device *dev)
{
return dma_ops;
}
EXPORT_SYMBOL(dma_get_ops);

8
arch/ia64/kernel/machvec.c
View file

@ -1,5 +1,5 @@
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <asm/machvec.h>
#include <asm/system.h>
@ -75,14 +75,16 @@ machvec_timer_interrupt (int irq, void *dev_id)
EXPORT_SYMBOL(machvec_timer_interrupt);
void
machvec_dma_sync_single (struct device *hwdev, dma_addr_t dma_handle, size_t size, int dir)
machvec_dma_sync_single(struct device *hwdev, dma_addr_t dma_handle, size_t size,
enum dma_data_direction dir)
{
mb();
}
EXPORT_SYMBOL(machvec_dma_sync_single);
void
machvec_dma_sync_sg (struct device *hwdev, struct scatterlist *sg, int n, int dir)
machvec_dma_sync_sg(struct device *hwdev, struct scatterlist *sg, int n,
enum dma_data_direction dir)
{
mb();
}

46
arch/ia64/kernel/pci-dma.c
View file

@ -32,9 +32,6 @@ int force_iommu __read_mostly = 1;
int force_iommu __read_mostly;
#endif
/* Set this to 1 if there is a HW IOMMU in the system */
int iommu_detected __read_mostly;
/* Dummy device used for NULL arguments (normally ISA). Better would
be probably a smaller DMA mask, but this is bug-to-bug compatible
to i386. */
@ -44,18 +41,7 @@ struct device fallback_dev = {
.dma_mask = &fallback_dev.coherent_dma_mask,
};
void __init pci_iommu_alloc(void)
{
/*
* The order of these functions is important for
* fall-back/fail-over reasons
*/
detect_intel_iommu();
#ifdef CONFIG_SWIOTLB
pci_swiotlb_init();
#endif
}
extern struct dma_map_ops intel_dma_ops;
static int __init pci_iommu_init(void)
{
@ -79,15 +65,12 @@ iommu_dma_init(void)
return;
}
struct dma_mapping_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
int iommu_dma_supported(struct device *dev, u64 mask)
{
struct dma_mapping_ops *ops = get_dma_ops(dev);
struct dma_map_ops *ops = platform_dma_get_ops(dev);
if (ops->dma_supported_op)
return ops->dma_supported_op(dev, mask);
if (ops->dma_supported)
return ops->dma_supported(dev, mask);
/* Copied from i386. Doesn't make much sense, because it will
only work for pci_alloc_coherent.
@ -116,4 +99,25 @@ int iommu_dma_supported(struct device *dev, u64 mask)
}
EXPORT_SYMBOL(iommu_dma_supported);
void __init pci_iommu_alloc(void)
{
dma_ops = &intel_dma_ops;
dma_ops->sync_single_for_cpu = machvec_dma_sync_single;
dma_ops->sync_sg_for_cpu = machvec_dma_sync_sg;
dma_ops->sync_single_for_device = machvec_dma_sync_single;
dma_ops->sync_sg_for_device = machvec_dma_sync_sg;
dma_ops->dma_supported = iommu_dma_supported;
/*
* The order of these functions is important for
* fall-back/fail-over reasons
*/
detect_intel_iommu();
#ifdef CONFIG_SWIOTLB
pci_swiotlb_init();
#endif
}
#endif

30
arch/ia64/kernel/pci-swiotlb.c
View file

@ -13,23 +13,37 @@
int swiotlb __read_mostly;
EXPORT_SYMBOL(swiotlb);
struct dma_mapping_ops swiotlb_dma_ops = {
.mapping_error = swiotlb_dma_mapping_error,
.alloc_coherent = swiotlb_alloc_coherent,
static void *ia64_swiotlb_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
{
if (dev->coherent_dma_mask != DMA_64BIT_MASK)
gfp |= GFP_DMA;
return swiotlb_alloc_coherent(dev, size, dma_handle, gfp);
}
struct dma_map_ops swiotlb_dma_ops = {
.alloc_coherent = ia64_swiotlb_alloc_coherent,
.free_coherent = swiotlb_free_coherent,
.map_single = swiotlb_map_single,
.unmap_single = swiotlb_unmap_single,
.map_page = swiotlb_map_page,
.unmap_page = swiotlb_unmap_page,
.map_sg = swiotlb_map_sg_attrs,
.unmap_sg = swiotlb_unmap_sg_attrs,
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
.sync_single_for_device = swiotlb_sync_single_for_device,
.sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
.sync_single_range_for_device = swiotlb_sync_single_range_for_device,
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = swiotlb_sync_sg_for_device,
.map_sg = swiotlb_map_sg,
.unmap_sg = swiotlb_unmap_sg,
.dma_supported_op = swiotlb_dma_supported,
.dma_supported = swiotlb_dma_supported,
.mapping_error = swiotlb_dma_mapping_error,
};
void __init swiotlb_dma_init(void)
{
dma_ops = &swiotlb_dma_ops;
swiotlb_init();
}
void __init pci_swiotlb_init(void)
{
if (!iommu_detected) {

99
arch/ia64/sn/pci/pci_dma.c
View file

@ -10,7 +10,7 @@
*/
#include <linux/module.h>
#include <linux/dma-attrs.h>
#include <linux/dma-mapping.h>
#include <asm/dma.h>
#include <asm/sn/intr.h>
#include <asm/sn/pcibus_provider_defs.h>
@ -31,7 +31,7 @@
* this function. Of course, SN only supports devices that have 32 or more
* address bits when using the PMU.
*/
int sn_dma_supported(struct device *dev, u64 mask)
static int sn_dma_supported(struct device *dev, u64 mask)
{
BUG_ON(dev->bus != &pci_bus_type);
@ -39,7 +39,6 @@ int sn_dma_supported(struct device *dev, u64 mask)
return 0;
return 1;
}
EXPORT_SYMBOL(sn_dma_supported);
/**
* sn_dma_set_mask - set the DMA mask
@ -75,8 +74,8 @@ EXPORT_SYMBOL(sn_dma_set_mask);
* queue for a SCSI controller). See Documentation/DMA-API.txt for
* more information.
*/
void *sn_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t flags)
static void *sn_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t flags)
{
void *cpuaddr;
unsigned long phys_addr;
@ -124,7 +123,6 @@ void *sn_dma_alloc_coherent(struct device *dev, size_t size,
return cpuaddr;
}
EXPORT_SYMBOL(sn_dma_alloc_coherent);
/**
* sn_pci_free_coherent - free memory associated with coherent DMAable region
@ -136,8 +134,8 @@ EXPORT_SYMBOL(sn_dma_alloc_coherent);
* Frees the memory allocated by dma_alloc_coherent(), potentially unmapping
* any associated IOMMU mappings.
*/
void sn_dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)
static void sn_dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
@ -147,7 +145,6 @@ void sn_dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
provider->dma_unmap(pdev, dma_handle, 0);
free_pages((unsigned long)cpu_addr, get_order(size));
}
EXPORT_SYMBOL(sn_dma_free_coherent);
/**
* sn_dma_map_single_attrs - map a single page for DMA
@ -173,10 +170,12 @@ EXPORT_SYMBOL(sn_dma_free_coherent);
* TODO: simplify our interface;
* figure out how to save dmamap handle so can use two step.
*/
dma_addr_t sn_dma_map_single_attrs(struct device *dev, void *cpu_addr,
size_t size, int direction,
struct dma_attrs *attrs)
static dma_addr_t sn_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
void *cpu_addr = page_address(page) + offset;
dma_addr_t dma_addr;
unsigned long phys_addr;
struct pci_dev *pdev = to_pci_dev(dev);
@ -201,7 +200,6 @@ dma_addr_t sn_dma_map_single_attrs(struct device *dev, void *cpu_addr,
}
return dma_addr;
}
EXPORT_SYMBOL(sn_dma_map_single_attrs);
/**
* sn_dma_unmap_single_attrs - unamp a DMA mapped page
@ -215,21 +213,20 @@ EXPORT_SYMBOL(sn_dma_map_single_attrs);
* by @dma_handle into the coherence domain. On SN, we're always cache
* coherent, so we just need to free any ATEs associated with this mapping.
*/
void sn_dma_unmap_single_attrs(struct device *dev, dma_addr_t dma_addr,
size_t size, int direction,
struct dma_attrs *attrs)
static void sn_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
BUG_ON(dev->bus != &pci_bus_type);
provider->dma_unmap(pdev, dma_addr, direction);
provider->dma_unmap(pdev, dma_addr, dir);
}
EXPORT_SYMBOL(sn_dma_unmap_single_attrs);
/**
* sn_dma_unmap_sg_attrs - unmap a DMA scatterlist
* sn_dma_unmap_sg - unmap a DMA scatterlist
* @dev: device to unmap
* @sg: scatterlist to unmap
* @nhwentries: number of scatterlist entries
@ -238,9 +235,9 @@ EXPORT_SYMBOL(sn_dma_unmap_single_attrs);
*
* Unmap a set of streaming mode DMA translations.
*/
void sn_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl,
int nhwentries, int direction,
struct dma_attrs *attrs)
static void sn_dma_unmap_sg(struct device *dev, struct scatterlist *sgl,
int nhwentries, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
int i;
struct pci_dev *pdev = to_pci_dev(dev);
@ -250,15 +247,14 @@ void sn_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl,
BUG_ON(dev->bus != &pci_bus_type);
for_each_sg(sgl, sg, nhwentries, i) {
provider->dma_unmap(pdev, sg->dma_address, direction);
provider->dma_unmap(pdev, sg->dma_address, dir);
sg->dma_address = (dma_addr_t) NULL;
sg->dma_length = 0;
}
}
EXPORT_SYMBOL(sn_dma_unmap_sg_attrs);
/**
* sn_dma_map_sg_attrs - map a scatterlist for DMA
* sn_dma_map_sg - map a scatterlist for DMA
* @dev: device to map for
* @sg: scatterlist to map
* @nhwentries: number of entries
@ -272,8 +268,9 @@ EXPORT_SYMBOL(sn_dma_unmap_sg_attrs);
*
* Maps each entry of @sg for DMA.
*/
int sn_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
int nhwentries, int direction, struct dma_attrs *attrs)
static int sn_dma_map_sg(struct device *dev, struct scatterlist *sgl,
int nhwentries, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
unsigned long phys_addr;
struct scatterlist *saved_sg = sgl, *sg;
@ -310,8 +307,7 @@ int sn_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
* Free any successfully allocated entries.
*/
if (i > 0)
sn_dma_unmap_sg_attrs(dev, saved_sg, i,
direction, attrs);
sn_dma_unmap_sg(dev, saved_sg, i, dir, attrs);
return 0;
}
@ -320,41 +316,36 @@ int sn_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
return nhwentries;
}
EXPORT_SYMBOL(sn_dma_map_sg_attrs);
void sn_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, int direction)
static void sn_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir)
{
BUG_ON(dev->bus != &pci_bus_type);
}
EXPORT_SYMBOL(sn_dma_sync_single_for_cpu);
void sn_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, int direction)
static void sn_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size,
enum dma_data_direction dir)
{
BUG_ON(dev->bus != &pci_bus_type);
}
EXPORT_SYMBOL(sn_dma_sync_single_for_device);
void sn_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nelems, int direction)
static void sn_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction dir)
{
BUG_ON(dev->bus != &pci_bus_type);
}
EXPORT_SYMBOL(sn_dma_sync_sg_for_cpu);
void sn_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int nelems, int direction)
static void sn_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction dir)
{
BUG_ON(dev->bus != &pci_bus_type);
}
EXPORT_SYMBOL(sn_dma_sync_sg_for_device);
int sn_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
static int sn_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
EXPORT_SYMBOL(sn_dma_mapping_error);
u64 sn_dma_get_required_mask(struct device *dev)
{
@ -471,3 +462,23 @@ int sn_pci_legacy_write(struct pci_bus *bus, u16 port, u32 val, u8 size)
out:
return ret;
}
static struct dma_map_ops sn_dma_ops = {
.alloc_coherent = sn_dma_alloc_coherent,
.free_coherent = sn_dma_free_coherent,
.map_page = sn_dma_map_page,
.unmap_page = sn_dma_unmap_page,
.map_sg = sn_dma_map_sg,
.unmap_sg = sn_dma_unmap_sg,
.sync_single_for_cpu = sn_dma_sync_single_for_cpu,
.sync_sg_for_cpu = sn_dma_sync_sg_for_cpu,
.sync_single_for_device = sn_dma_sync_single_for_device,
.sync_sg_for_device = sn_dma_sync_sg_for_device,
.mapping_error = sn_dma_mapping_error,
.dma_supported = sn_dma_supported,
};
void sn_dma_init(void)
{
dma_ops = &sn_dma_ops;
}

1
arch/x86/Kconfig
View file

@ -40,6 +40,7 @@ config X86
select HAVE_GENERIC_DMA_COHERENT if X86_32
select HAVE_EFFICIENT_UNALIGNED_ACCESS
select USER_STACKTRACE_SUPPORT
select HAVE_DMA_API_DEBUG
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_LZMA

2
arch/x86/include/asm/device.h
View file

@ -6,7 +6,7 @@ struct dev_archdata {
void *acpi_handle;
#endif
#ifdef CONFIG_X86_64
struct dma_mapping_ops *dma_ops;
struct dma_map_ops *dma_ops;
#endif
#ifdef CONFIG_DMAR
void *iommu; /* hook for IOMMU specific extension */

184
arch/x86/include/asm/dma-mapping.h
View file

@ -7,6 +7,8 @@
*/
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <linux/dma-attrs.h>
#include <asm/io.h>
#include <asm/swiotlb.h>
#include <asm-generic/dma-coherent.h>
@ -16,47 +18,9 @@ extern int iommu_merge;
extern struct device x86_dma_fallback_dev;
extern int panic_on_overflow;
struct dma_mapping_ops {
int (*mapping_error)(struct device *dev,
dma_addr_t dma_addr);
void* (*alloc_coherent)(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
void (*free_coherent)(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
dma_addr_t (*map_single)(struct device *hwdev, phys_addr_t ptr,
size_t size, int direction);
void (*unmap_single)(struct device *dev, dma_addr_t addr,
size_t size, int direction);
void (*sync_single_for_cpu)(struct device *hwdev,
dma_addr_t dma_handle, size_t size,
int direction);
void (*sync_single_for_device)(struct device *hwdev,
dma_addr_t dma_handle, size_t size,
int direction);
void (*sync_single_range_for_cpu)(struct device *hwdev,
dma_addr_t dma_handle, unsigned long offset,
size_t size, int direction);
void (*sync_single_range_for_device)(struct device *hwdev,
dma_addr_t dma_handle, unsigned long offset,
size_t size, int direction);
void (*sync_sg_for_cpu)(struct device *hwdev,
struct scatterlist *sg, int nelems,
int direction);
void (*sync_sg_for_device)(struct device *hwdev,
struct scatterlist *sg, int nelems,
int direction);
int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
int nents, int direction);
void (*unmap_sg)(struct device *hwdev,
struct scatterlist *sg, int nents,
int direction);
int (*dma_supported)(struct device *hwdev, u64 mask);
int is_phys;
};
extern struct dma_map_ops *dma_ops;
extern struct dma_mapping_ops *dma_ops;
static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
#ifdef CONFIG_X86_32
return dma_ops;
@ -71,7 +35,7 @@ static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
/* Make sure we keep the same behaviour */
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_mapping_ops *ops = get_dma_ops(dev);
struct dma_map_ops *ops = get_dma_ops(dev);
if (ops->mapping_error)
return ops->mapping_error(dev, dma_addr);
@ -90,137 +54,167 @@ extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
static inline dma_addr_t
dma_map_single(struct device *hwdev, void *ptr, size_t size,
int direction)
enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
dma_addr_t addr;
BUG_ON(!valid_dma_direction(direction));
return ops->map_single(hwdev, virt_to_phys(ptr), size, direction);
BUG_ON(!valid_dma_direction(dir));
addr = ops->map_page(hwdev, virt_to_page(ptr),
(unsigned long)ptr & ~PAGE_MASK, size,
dir, NULL);
debug_dma_map_page(hwdev, virt_to_page(ptr),
(unsigned long)ptr & ~PAGE_MASK, size,
dir, addr, true);
return addr;
}
static inline void
dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
int direction)
enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(dev);
struct dma_map_ops *ops = get_dma_ops(dev);
BUG_ON(!valid_dma_direction(direction));
if (ops->unmap_single)
ops->unmap_single(dev, addr, size, direction);
BUG_ON(!valid_dma_direction(dir));
if (ops->unmap_page)
ops->unmap_page(dev, addr, size, dir, NULL);
debug_dma_unmap_page(dev, addr, size, dir, true);
}
static inline int
dma_map_sg(struct device *hwdev, struct scatterlist *sg,
int nents, int direction)
int nents, enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
int ents;
BUG_ON(!valid_dma_direction(direction));
return ops->map_sg(hwdev, sg, nents, direction);
BUG_ON(!valid_dma_direction(dir));
ents = ops->map_sg(hwdev, sg, nents, dir, NULL);
debug_dma_map_sg(hwdev, sg, nents, ents, dir);
return ents;
}
static inline void
dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
int direction)
enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
BUG_ON(!valid_dma_direction(direction));
BUG_ON(!valid_dma_direction(dir));
debug_dma_unmap_sg(hwdev, sg, nents, dir);
if (ops->unmap_sg)
ops->unmap_sg(hwdev, sg, nents, direction);
ops->unmap_sg(hwdev, sg, nents, dir, NULL);
}
static inline void
dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
size_t size, int direction)
size_t size, enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
BUG_ON(!valid_dma_direction(direction));
BUG_ON(!valid_dma_direction(dir));
if (ops->sync_single_for_cpu)
ops->sync_single_for_cpu(hwdev, dma_handle, size, direction);
ops->sync_single_for_cpu(hwdev, dma_handle, size, dir);
debug_dma_sync_single_for_cpu(hwdev, dma_handle, size, dir);
flush_write_buffers();
}
static inline void
dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
size_t size, int direction)
size_t size, enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
BUG_ON(!valid_dma_direction(direction));
BUG_ON(!valid_dma_direction(dir));
if (ops->sync_single_for_device)
ops->sync_single_for_device(hwdev, dma_handle, size, direction);
ops->sync_single_for_device(hwdev, dma_handle, size, dir);
debug_dma_sync_single_for_device(hwdev, dma_handle, size, dir);
flush_write_buffers();
}
static inline void
dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
unsigned long offset, size_t size, int direction)
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
BUG_ON(!valid_dma_direction(direction));
BUG_ON(!valid_dma_direction(dir));
if (ops->sync_single_range_for_cpu)
ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
size, direction);
size, dir);
debug_dma_sync_single_range_for_cpu(hwdev, dma_handle,
offset, size, dir);
flush_write_buffers();
}
static inline void
dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
int direction)
enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
BUG_ON(!valid_dma_direction(direction));
BUG_ON(!valid_dma_direction(dir));
if (ops->sync_single_range_for_device)
ops->sync_single_range_for_device(hwdev, dma_handle,
offset, size, direction);
offset, size, dir);
debug_dma_sync_single_range_for_device(hwdev, dma_handle,
offset, size, dir);
flush_write_buffers();
}
static inline void
dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
int nelems, int direction)
int nelems, enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
BUG_ON(!valid_dma_direction(direction));
BUG_ON(!valid_dma_direction(dir));
if (ops->sync_sg_for_cpu)
ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
ops->sync_sg_for_cpu(hwdev, sg, nelems, dir);
debug_dma_sync_sg_for_cpu(hwdev, sg, nelems, dir);
flush_write_buffers();
}
static inline void
dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
int nelems, int direction)
int nelems, enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
struct dma_map_ops *ops = get_dma_ops(hwdev);
BUG_ON(!valid_dma_direction(direction));
BUG_ON(!valid_dma_direction(dir));
if (ops->sync_sg_for_device)
ops->sync_sg_for_device(hwdev, sg, nelems, direction);
ops->sync_sg_for_device(hwdev, sg, nelems, dir);
debug_dma_sync_sg_for_device(hwdev, sg, nelems, dir);
flush_write_buffers();
}
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
size_t offset, size_t size,
int direction)
enum dma_data_direction dir)
{
struct dma_mapping_ops *ops = get_dma_ops(dev);
struct dma_map_ops *ops = get_dma_ops(dev);
dma_addr_t addr;
BUG_ON(!valid_dma_direction(direction));
return ops->map_single(dev, page_to_phys(page) + offset,
size, direction);
BUG_ON(!valid_dma_direction(dir));
addr = ops->map_page(dev, page, offset, size, dir, NULL);
debug_dma_map_page(dev, page, offset, size, dir, addr, false);
return addr;
}
static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
size_t size, int direction)
size_t size, enum dma_data_direction dir)
{
dma_unmap_single(dev, addr, size, direction);
struct dma_map_ops *ops = get_dma_ops(dev);
BUG_ON(!valid_dma_direction(dir));
if (ops->unmap_page)
ops->unmap_page(dev, addr, size, dir, NULL);
debug_dma_unmap_page(dev, addr, size, dir, false);
}
static inline void
@ -266,7 +260,7 @@ static inline void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t gfp)
{
struct dma_mapping_ops *ops = get_dma_ops(dev);
struct dma_map_ops *ops = get_dma_ops(dev);
void *memory;
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
@ -285,20 +279,24 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
if (!ops->alloc_coherent)
return NULL;
return ops->alloc_coherent(dev, size, dma_handle,
dma_alloc_coherent_gfp_flags(dev, gfp));
memory = ops->alloc_coherent(dev, size, dma_handle,
dma_alloc_coherent_gfp_flags(dev, gfp));
debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
return memory;
}
static inline void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t bus)
{
struct dma_mapping_ops *ops = get_dma_ops(dev);
struct dma_map_ops *ops = get_dma_ops(dev);
WARN_ON(irqs_disabled()); /* for portability */
if (dma_release_from_coherent(dev, get_order(size), vaddr))
return;
debug_dma_free_coherent(dev, size, vaddr, bus);
if (ops->free_coherent)
ops->free_coherent(dev, size, vaddr, bus);
}

2
arch/x86/include/asm/iommu.h
View file

@ -3,7 +3,7 @@
extern void pci_iommu_shutdown(void);
extern void no_iommu_init(void);
extern struct dma_mapping_ops nommu_dma_ops;
extern struct dma_map_ops nommu_dma_ops;
extern int force_iommu, no_iommu;
extern int iommu_detected;

2
arch/x86/kernel/Makefile
View file

@ -105,7 +105,7 @@ obj-$(CONFIG_MICROCODE) += microcode.o
obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o
obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o # NB rename without _64
obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o
###
# 64 bit specific files

26
arch/x86/kernel/amd_iommu.c
View file

@ -22,10 +22,9 @@
#include <linux/bitops.h>
#include <linux/debugfs.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
#include <linux/iommu-helper.h>
#ifdef CONFIG_IOMMU_API
#include <linux/iommu.h>
#endif
#include <asm/proto.h>
#include <asm/iommu.h>
#include <asm/gart.h>
@ -1297,8 +1296,10 @@ static void __unmap_single(struct amd_iommu *iommu,
/*
* The exported map_single function for dma_ops.
*/
static dma_addr_t map_single(struct device *dev, phys_addr_t paddr,
size_t size, int dir)
static dma_addr_t 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 flags;
struct amd_iommu *iommu;
@ -1306,6 +1307,7 @@ static dma_addr_t map_single(struct device *dev, phys_addr_t paddr,
u16 devid;
dma_addr_t addr;
u64 dma_mask;
phys_addr_t paddr = page_to_phys(page) + offset;
INC_STATS_COUNTER(cnt_map_single);
@ -1340,8 +1342,8 @@ static dma_addr_t map_single(struct device *dev, phys_addr_t paddr,
/*
* The exported unmap_single function for dma_ops.
*/
static void unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, int dir)
static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
unsigned long flags;
struct amd_iommu *iommu;
@ -1390,7 +1392,8 @@ static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist,
* lists).
*/
static int map_sg(struct device *dev, struct scatterlist *sglist,
int nelems, int dir)
int nelems, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
unsigned long flags;
struct amd_iommu *iommu;
@ -1457,7 +1460,8 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
* lists).
*/
static void unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems, int dir)
int nelems, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
unsigned long flags;
struct amd_iommu *iommu;
@ -1644,11 +1648,11 @@ static void prealloc_protection_domains(void)
}
}
static struct dma_mapping_ops amd_iommu_dma_ops = {
static struct dma_map_ops amd_iommu_dma_ops = {
.alloc_coherent = alloc_coherent,
.free_coherent = free_coherent,
.map_single = map_single,
.unmap_single = unmap_single,
.map_page = map_page,
.unmap_page = unmap_page,
.map_sg = map_sg,
.unmap_sg = unmap_sg,
.dma_supported = amd_iommu_dma_supported,

38
arch/x86/kernel/pci-calgary_64.c
View file

@ -380,8 +380,9 @@ static inline struct iommu_table *find_iommu_table(struct device *dev)
return tbl;
}
static void calgary_unmap_sg(struct device *dev,
struct scatterlist *sglist, int nelems, int direction)
static void calgary_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems,enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct iommu_table *tbl = find_iommu_table(dev);
struct scatterlist *s;
@ -404,7 +405,8 @@ static void calgary_unmap_sg(struct device *dev,
}
static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
int nelems, int direction)
int nelems, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct iommu_table *tbl = find_iommu_table(dev);
struct scatterlist *s;
@ -429,15 +431,14 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
s->dma_address = (entry << PAGE_SHIFT) | s->offset;
/* insert into HW table */
tce_build(tbl, entry, npages, vaddr & PAGE_MASK,
direction);
tce_build(tbl, entry, npages, vaddr & PAGE_MASK, dir);
s->dma_length = s->length;
}
return nelems;
error:
calgary_unmap_sg(dev, sg, nelems, direction);
calgary_unmap_sg(dev, sg, nelems, dir, NULL);
for_each_sg(sg, s, nelems, i) {
sg->dma_address = bad_dma_address;
sg->dma_length = 0;
@ -445,10 +446,12 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
return 0;
}
static dma_addr_t calgary_map_single(struct device *dev, phys_addr_t paddr,
size_t size, int direction)
static dma_addr_t calgary_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
void *vaddr = phys_to_virt(paddr);
void *vaddr = page_address(page) + offset;
unsigned long uaddr;
unsigned int npages;
struct iommu_table *tbl = find_iommu_table(dev);
@ -456,17 +459,18 @@ static dma_addr_t calgary_map_single(struct device *dev, phys_addr_t paddr,
uaddr = (unsigned long)vaddr;
npages = iommu_num_pages(uaddr, size, PAGE_SIZE);
return iommu_alloc(dev, tbl, vaddr, npages, direction);
return iommu_alloc(dev, tbl, vaddr, npages, dir);
}
static void calgary_unmap_single(struct device *dev, dma_addr_t dma_handle,
size_t size, int direction)
static void calgary_unmap_page(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct iommu_table *tbl = find_iommu_table(dev);
unsigned int npages;
npages = iommu_num_pages(dma_handle, size, PAGE_SIZE);
iommu_free(tbl, dma_handle, npages);
npages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
iommu_free(tbl, dma_addr, npages);
}
static void* calgary_alloc_coherent(struct device *dev, size_t size,
@ -515,13 +519,13 @@ static void calgary_free_coherent(struct device *dev, size_t size,
free_pages((unsigned long)vaddr, get_order(size));
}
static struct dma_mapping_ops calgary_dma_ops = {
static struct dma_map_ops calgary_dma_ops = {
.alloc_coherent = calgary_alloc_coherent,
.free_coherent = calgary_free_coherent,
.map_single = calgary_map_single,
.unmap_single = calgary_unmap_single,
.map_sg = calgary_map_sg,
.unmap_sg = calgary_unmap_sg,
.map_page = calgary_map_page,
.unmap_page = calgary_unmap_page,
};
static inline void __iomem * busno_to_bbar(unsigned char num)

14
arch/x86/kernel/pci-dma.c
View file

@ -1,4 +1,5 @@
#include <linux/dma-mapping.h>
#include <linux/dma-debug.h>
#include <linux/dmar.h>
#include <linux/bootmem.h>
#include <linux/pci.h>
@ -12,7 +13,7 @@
static int forbid_dac __read_mostly;
struct dma_mapping_ops *dma_ops;
struct dma_map_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
static int iommu_sac_force __read_mostly;
@ -44,6 +45,9 @@ struct device x86_dma_fallback_dev = {
};
EXPORT_SYMBOL(x86_dma_fallback_dev);
/* Number of entries preallocated for DMA-API debugging */
#define PREALLOC_DMA_DEBUG_ENTRIES 32768
int dma_set_mask(struct device *dev, u64 mask)
{
if (!dev->dma_mask || !dma_supported(dev, mask))
@ -224,7 +228,7 @@ early_param("iommu", iommu_setup);
int dma_supported(struct device *dev, u64 mask)
{
struct dma_mapping_ops *ops = get_dma_ops(dev);
struct dma_map_ops *ops = get_dma_ops(dev);
#ifdef CONFIG_PCI
if (mask > 0xffffffff && forbid_dac > 0) {
@ -265,6 +269,12 @@ EXPORT_SYMBOL(dma_supported);
static int __init pci_iommu_init(void)
{
dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
#ifdef CONFIG_PCI
dma_debug_add_bus(&pci_bus_type);
#endif
calgary_iommu_init();
intel_iommu_init();

34
arch/x86/kernel/pci-gart_64.c
View file

@ -255,10 +255,13 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
}
/* Map a single area into the IOMMU */
static dma_addr_t
gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
static dma_addr_t gart_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 bus;
phys_addr_t paddr = page_to_phys(page) + offset;
if (!dev)
dev = &x86_dma_fallback_dev;
@ -275,8 +278,9 @@ gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
/*
* Free a DMA mapping.
*/
static void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, int direction)
static void gart_unmap_page(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
unsigned long iommu_page;
int npages;
@ -298,8 +302,8 @@ static void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
/*
* Wrapper for pci_unmap_single working with scatterlists.
*/
static void
gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
static void gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
struct scatterlist *s;
int i;
@ -307,7 +311,7 @@ gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
for_each_sg(sg, s, nents, i) {
if (!s->dma_length || !s->length)
break;
gart_unmap_single(dev, s->dma_address, s->dma_length, dir);
gart_unmap_page(dev, s->dma_address, s->dma_length, dir, NULL);
}
}
@ -329,7 +333,7 @@ static int dma_map_sg_nonforce(struct device *dev, struct scatterlist *sg,
addr = dma_map_area(dev, addr, s->length, dir, 0);
if (addr == bad_dma_address) {
if (i > 0)
gart_unmap_sg(dev, sg, i, dir);
gart_unmap_sg(dev, sg, i, dir, NULL);
nents = 0;
sg[0].dma_length = 0;
break;
@ -400,8 +404,8 @@ dma_map_cont(struct device *dev, struct scatterlist *start, int nelems,
* DMA map all entries in a scatterlist.
* Merge chunks that have page aligned sizes into a continuous mapping.
*/
static int
gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
static int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
struct scatterlist *s, *ps, *start_sg, *sgmap;
int need = 0, nextneed, i, out, start;
@ -468,7 +472,7 @@ gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
error:
flush_gart();
gart_unmap_sg(dev, sg, out, dir);
gart_unmap_sg(dev, sg, out, dir, NULL);
/* When it was forced or merged try again in a dumb way */
if (force_iommu || iommu_merge) {
@ -521,7 +525,7 @@ static void
gart_free_coherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_addr)
{
gart_unmap_single(dev, dma_addr, size, DMA_BIDIRECTIONAL);
gart_unmap_page(dev, dma_addr, size, DMA_BIDIRECTIONAL, NULL);
free_pages((unsigned long)vaddr, get_order(size));
}
@ -707,11 +711,11 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
return -1;
}
static struct dma_mapping_ops gart_dma_ops = {
.map_single = gart_map_single,
.unmap_single = gart_unmap_single,
static struct dma_map_ops gart_dma_ops = {
.map_sg = gart_map_sg,
.unmap_sg = gart_unmap_sg,
.map_page = gart_map_page,
.unmap_page = gart_unmap_page,
.alloc_coherent = gart_alloc_coherent,
.free_coherent = gart_free_coherent,
};

21
arch/x86/kernel/pci-nommu.c
View file

@ -25,19 +25,19 @@ check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size)
return 1;
}
static dma_addr_t
nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size,
int direction)
static dma_addr_t nommu_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
dma_addr_t bus = paddr;
dma_addr_t bus = page_to_phys(page) + offset;
WARN_ON(size == 0);
if (!check_addr("map_single", hwdev, bus, size))
return bad_dma_address;
if (!check_addr("map_single", dev, bus, size))
return bad_dma_address;
flush_write_buffers();
return bus;
}
/* Map a set of buffers described by scatterlist in streaming
* mode for DMA. This is the scatter-gather version of the
* above pci_map_single interface. Here the scatter gather list
@ -54,7 +54,8 @@ nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size,
* the same here.
*/
static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
int nents, int direction)
int nents, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct scatterlist *s;
int i;
@ -78,11 +79,11 @@ static void nommu_free_coherent(struct device *dev, size_t size, void *vaddr,
free_pages((unsigned long)vaddr, get_order(size));
}
struct dma_mapping_ops nommu_dma_ops = {
struct dma_map_ops nommu_dma_ops = {
.alloc_coherent = dma_generic_alloc_coherent,
.free_coherent = nommu_free_coherent,
.map_single = nommu_map_single,
.map_sg = nommu_map_sg,
.map_page = nommu_map_page,
.is_phys = 1,
};

19
arch/x86/kernel/pci-swiotlb_64.c → arch/x86/kernel/pci-swiotlb.c
View file

@ -33,18 +33,11 @@ phys_addr_t swiotlb_bus_to_phys(dma_addr_t baddr)
return baddr;
}
int __weak swiotlb_arch_range_needs_mapping(void *ptr, size_t size)
int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
{
return 0;
}
static dma_addr_t
swiotlb_map_single_phys(struct device *hwdev, phys_addr_t paddr, size_t size,
int direction)
{
return swiotlb_map_single(hwdev, phys_to_virt(paddr), size, direction);
}
static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags)
{
@ -57,20 +50,20 @@ static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
return swiotlb_alloc_coherent(hwdev, size, dma_handle, flags);
}
struct dma_mapping_ops swiotlb_dma_ops = {
struct dma_map_ops swiotlb_dma_ops = {
.mapping_error = swiotlb_dma_mapping_error,
.alloc_coherent = x86_swiotlb_alloc_coherent,
.free_coherent = swiotlb_free_coherent,
.map_single = swiotlb_map_single_phys,
.unmap_single = swiotlb_unmap_single,
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
.sync_single_for_device = swiotlb_sync_single_for_device,
.sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
.sync_single_range_for_device = swiotlb_sync_single_range_for_device,
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = swiotlb_sync_sg_for_device,
.map_sg = swiotlb_map_sg,
.unmap_sg = swiotlb_unmap_sg,
.map_sg = swiotlb_map_sg_attrs,
.unmap_sg = swiotlb_unmap_sg_attrs,
.map_page = swiotlb_map_page,
.unmap_page = swiotlb_unmap_page,
.dma_supported = NULL,
};

2
drivers/base/iommu.c
View file

@ -31,7 +31,7 @@ void register_iommu(struct iommu_ops *ops)
iommu_ops = ops;
}
bool iommu_found()
bool iommu_found(void)
{
return iommu_ops != NULL;
}

50
drivers/pci/intel-iommu.c
View file

@ -2124,11 +2124,13 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
return 0;
}
dma_addr_t intel_map_single(struct device *hwdev, phys_addr_t paddr,
size_t size, int dir)
static dma_addr_t intel_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
return __intel_map_single(hwdev, paddr, size, dir,
to_pci_dev(hwdev)->dma_mask);
return __intel_map_single(dev, page_to_phys(page) + offset, size,
dir, to_pci_dev(dev)->dma_mask);
}
static void flush_unmaps(void)
@ -2192,8 +2194,9 @@ static void add_unmap(struct dmar_domain *dom, struct iova *iova)
spin_unlock_irqrestore(&async_umap_flush_lock, flags);
}
void intel_unmap_single(struct device *dev, dma_addr_t dev_addr, size_t size,
int dir)
static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct dmar_domain *domain;
@ -2237,8 +2240,14 @@ void intel_unmap_single(struct device *dev, dma_addr_t dev_addr, size_t size,
}
}
void *intel_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags)
static void intel_unmap_single(struct device *dev, dma_addr_t dev_addr, size_t size,
int dir)
{
intel_unmap_page(dev, dev_addr, size, dir, NULL);
}
static void *intel_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags)
{
void *vaddr;
int order;
@ -2261,8 +2270,8 @@ void *intel_alloc_coherent(struct device *hwdev, size_t size,
return NULL;
}
void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dma_handle)
static void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
int order;
@ -2275,8 +2284,9 @@ void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr,
#define SG_ENT_VIRT_ADDRESS(sg) (sg_virt((sg)))
void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
int nelems, int dir)
static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
int nelems, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
int i;
struct pci_dev *pdev = to_pci_dev(hwdev);
@ -2333,8 +2343,8 @@ static int intel_nontranslate_map_sg(struct device *hddev,
return nelems;
}
int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems,
int dir)
static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
void *addr;
int i;
@ -2414,13 +2424,19 @@ int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems,
return nelems;
}
static struct dma_mapping_ops intel_dma_ops = {
static int intel_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return !dma_addr;
}
struct dma_map_ops intel_dma_ops = {
.alloc_coherent = intel_alloc_coherent,
.free_coherent = intel_free_coherent,
.map_single = intel_map_single,
.unmap_single = intel_unmap_single,
.map_sg = intel_map_sg,
.unmap_sg = intel_unmap_sg,
.map_page = intel_map_page,
.unmap_page = intel_unmap_page,
.mapping_error = intel_mapping_error,
};
static inline int iommu_domain_cache_init(void)

174
include/linux/dma-debug.h Normal file
View file

@ -0,0 +1,174 @@
/*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* Author: Joerg Roedel <joerg.roedel@amd.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __DMA_DEBUG_H
#define __DMA_DEBUG_H
#include <linux/types.h>
struct device;
struct scatterlist;
struct bus_type;
#ifdef CONFIG_DMA_API_DEBUG
extern void dma_debug_add_bus(struct bus_type *bus);
extern void dma_debug_init(u32 num_entries);
extern void debug_dma_map_page(struct device *dev, struct page *page,
size_t offset, size_t size,
int direction, dma_addr_t dma_addr,
bool map_single);
extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
size_t size, int direction, bool map_single);
extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, int mapped_ents, int direction);
extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems, int dir);
extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t dma_addr, void *virt);
extern void debug_dma_free_coherent(struct device *dev, size_t size,
void *virt, dma_addr_t addr);
extern void debug_dma_sync_single_for_cpu(struct device *dev,
dma_addr_t dma_handle, size_t size,
int direction);
extern void debug_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle,
size_t size, int direction);
extern void debug_dma_sync_single_range_for_cpu(struct device *dev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size,
int direction);
extern void debug_dma_sync_single_range_for_device(struct device *dev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size, int direction);
extern void debug_dma_sync_sg_for_cpu(struct device *dev,
struct scatterlist *sg,
int nelems, int direction);
extern void debug_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sg,
int nelems, int direction);
extern void debug_dma_dump_mappings(struct device *dev);
#else /* CONFIG_DMA_API_DEBUG */
static inline void dma_debug_add_bus(struct bus_type *bus)
{
}
static inline void dma_debug_init(u32 num_entries)
{
}
static inline void debug_dma_map_page(struct device *dev, struct page *page,
size_t offset, size_t size,
int direction, dma_addr_t dma_addr,
bool map_single)
{
}
static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
size_t size, int direction,
bool map_single)
{
}
static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, int mapped_ents, int direction)
{
}
static inline void debug_dma_unmap_sg(struct device *dev,
struct scatterlist *sglist,
int nelems, int dir)
{
}
static inline void debug_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t dma_addr, void *virt)
{
}
static inline void debug_dma_free_coherent(struct device *dev, size_t size,
void *virt, dma_addr_t addr)
{
}
static inline void debug_dma_sync_single_for_cpu(struct device *dev,
dma_addr_t dma_handle,
size_t size, int direction)
{
}
static inline void debug_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle,
size_t size, int direction)
{
}
static inline void debug_dma_sync_single_range_for_cpu(struct device *dev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size,
int direction)
{
}
static inline void debug_dma_sync_single_range_for_device(struct device *dev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size,
int direction)
{
}
static inline void debug_dma_sync_sg_for_cpu(struct device *dev,
struct scatterlist *sg,
int nelems, int direction)
{
}
static inline void debug_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sg,
int nelems, int direction)
{
}
static inline void debug_dma_dump_mappings(struct device *dev)
{
}
#endif /* CONFIG_DMA_API_DEBUG */
#endif /* __DMA_DEBUG_H */

48
include/linux/dma-mapping.h
View file

@ -3,6 +3,8 @@
#include <linux/device.h>
#include <linux/err.h>
#include <linux/dma-attrs.h>
#include <linux/scatterlist.h>
/* These definitions mirror those in pci.h, so they can be used
* interchangeably with their PCI_ counterparts */
@ -13,6 +15,52 @@ enum dma_data_direction {
DMA_NONE = 3,
};
struct dma_map_ops {
void* (*alloc_coherent)(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
void (*free_coherent)(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
dma_addr_t (*map_page)(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs);
void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs);
int (*map_sg)(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir,
struct dma_attrs *attrs);
void (*unmap_sg)(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir,
struct dma_attrs *attrs);
void (*sync_single_for_cpu)(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction dir);
void (*sync_single_for_device)(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction dir);
void (*sync_single_range_for_cpu)(struct device *dev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size,
enum dma_data_direction dir);
void (*sync_single_range_for_device)(struct device *dev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size,
enum dma_data_direction dir);
void (*sync_sg_for_cpu)(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir);
void (*sync_sg_for_device)(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir);
int (*mapping_error)(struct device *dev, dma_addr_t dma_addr);
int (*dma_supported)(struct device *dev, u64 mask);
int is_phys;
};
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
/*

7
include/linux/intel-iommu.h
View file

@ -332,11 +332,4 @@ extern int qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);
extern void *intel_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
extern void intel_free_coherent(struct device *, size_t, void *, dma_addr_t);
extern dma_addr_t intel_map_single(struct device *, phys_addr_t, size_t, int);
extern void intel_unmap_single(struct device *, dma_addr_t, size_t, int);
extern int intel_map_sg(struct device *, struct scatterlist *, int, int);
extern void intel_unmap_sg(struct device *, struct scatterlist *, int, int);
#endif

41
include/linux/swiotlb.h
View file

@ -31,7 +31,7 @@ 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);
extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
@ -41,20 +41,13 @@ extern void
swiotlb_free_coherent(struct device *hwdev, size_t size,
void *vaddr, dma_addr_t dma_handle);
extern dma_addr_t
swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir);
extern void
swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir);
extern dma_addr_t
swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
int dir, struct dma_attrs *attrs);
extern void
swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir, struct dma_attrs *attrs);
extern 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);
extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs);
extern int
swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
@ -66,36 +59,38 @@ swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
extern int
swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
int dir, struct dma_attrs *attrs);
enum dma_data_direction dir, struct dma_attrs *attrs);
extern void
swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
int nelems, int dir, struct dma_attrs *attrs);
int nelems, enum dma_data_direction dir,
struct dma_attrs *attrs);
extern void
swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir);
size_t size, enum dma_data_direction dir);
extern void
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir);
int nelems, enum dma_data_direction dir);
extern void
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir);
size_t size, enum dma_data_direction dir);
extern void
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir);
int nelems, enum dma_data_direction dir);
extern void
swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
unsigned long offset, size_t size, int dir);
unsigned long offset, size_t size,
enum dma_data_direction dir);
extern void
swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
unsigned long offset, size_t size,
int dir);
enum dma_data_direction dir);
extern int
swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);

11
lib/Kconfig.debug
View file

@ -912,6 +912,17 @@ config DYNAMIC_DEBUG
See Documentation/dynamic-debug-howto.txt for additional information.
config DMA_API_DEBUG
bool "Enable debugging of DMA-API usage"
depends on HAVE_DMA_API_DEBUG
help
Enable this option to debug the use of the DMA API by device drivers.
With this option you will be able to detect common bugs in device
drivers like double-freeing of DMA mappings or freeing mappings that
were never allocated.
This option causes a performance degredation. Use only if you want
to debug device drivers. If unsure, say N.
source "samples/Kconfig"
source "lib/Kconfig.kgdb"

2
lib/Makefile
View file

@ -90,6 +90,8 @@ obj-$(CONFIG_DYNAMIC_DEBUG) += dynamic_debug.o
obj-$(CONFIG_NLATTR) += nlattr.o
obj-$(CONFIG_DMA_API_DEBUG) += dma-debug.o
hostprogs-y := gen_crc32table
clean-files := crc32table.h

955
lib/dma-debug.c Normal file
View file

@ -0,0 +1,955 @@
/*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* Author: Joerg Roedel <joerg.roedel@amd.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
#include <linux/stacktrace.h>
#include <linux/dma-debug.h>
#include <linux/spinlock.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <asm/sections.h>
#define HASH_SIZE 1024ULL
#define HASH_FN_SHIFT 13
#define HASH_FN_MASK (HASH_SIZE - 1)
enum {
dma_debug_single,
dma_debug_page,
dma_debug_sg,
dma_debug_coherent,
};
#define DMA_DEBUG_STACKTRACE_ENTRIES 5
struct dma_debug_entry {
struct list_head list;
struct device *dev;
int type;
phys_addr_t paddr;
u64 dev_addr;
u64 size;
int direction;
int sg_call_ents;
int sg_mapped_ents;
#ifdef CONFIG_STACKTRACE
struct stack_trace stacktrace;
unsigned long st_entries[DMA_DEBUG_STACKTRACE_ENTRIES];
#endif
};
struct hash_bucket {
struct list_head list;
spinlock_t lock;
} ____cacheline_aligned_in_smp;
/* Hash list to save the allocated dma addresses */
static struct hash_bucket dma_entry_hash[HASH_SIZE];
/* List of pre-allocated dma_debug_entry's */
static LIST_HEAD(free_entries);
/* Lock for the list above */
static DEFINE_SPINLOCK(free_entries_lock);
/* Global disable flag - will be set in case of an error */
static bool global_disable __read_mostly;
/* Global error count */
static u32 error_count;
/* Global error show enable*/
static u32 show_all_errors __read_mostly;
/* Number of errors to show */
static u32 show_num_errors = 1;
static u32 num_free_entries;
static u32 min_free_entries;
/* number of preallocated entries requested by kernel cmdline */
static u32 req_entries;
/* debugfs dentry's for the stuff above */
static struct dentry *dma_debug_dent __read_mostly;
static struct dentry *global_disable_dent __read_mostly;
static struct dentry *error_count_dent __read_mostly;
static struct dentry *show_all_errors_dent __read_mostly;
static struct dentry *show_num_errors_dent __read_mostly;
static struct dentry *num_free_entries_dent __read_mostly;
static struct dentry *min_free_entries_dent __read_mostly;
static const char *type2name[4] = { "single", "page",
"scather-gather", "coherent" };
static const char *dir2name[4] = { "DMA_BIDIRECTIONAL", "DMA_TO_DEVICE",
"DMA_FROM_DEVICE", "DMA_NONE" };
/*
* The access to some variables in this macro is racy. We can't use atomic_t
* here because all these variables are exported to debugfs. Some of them even
* writeable. This is also the reason why a lock won't help much. But anyway,
* the races are no big deal. Here is why:
*
* error_count: the addition is racy, but the worst thing that can happen is
* that we don't count some errors
* show_num_errors: the subtraction is racy. Also no big deal because in
* worst case this will result in one warning more in the
* system log than the user configured. This variable is
* writeable via debugfs.
*/
static inline void dump_entry_trace(struct dma_debug_entry *entry)
{
#ifdef CONFIG_STACKTRACE
if (entry) {
printk(KERN_WARNING "Mapped at:\n");
print_stack_trace(&entry->stacktrace, 0);
}
#endif
}
#define err_printk(dev, entry, format, arg...) do { \
error_count += 1; \
if (show_all_errors || show_num_errors > 0) { \
WARN(1, "%s %s: " format, \
dev_driver_string(dev), \
dev_name(dev) , ## arg); \
dump_entry_trace(entry); \
} \
if (!show_all_errors && show_num_errors > 0) \
show_num_errors -= 1; \
} while (0);
/*
* Hash related functions
*
* Every DMA-API request is saved into a struct dma_debug_entry. To
* have quick access to these structs they are stored into a hash.
*/
static int hash_fn(struct dma_debug_entry *entry)
{
/*
* Hash function is based on the dma address.
* We use bits 20-27 here as the index into the hash
*/
return (entry->dev_addr >> HASH_FN_SHIFT) & HASH_FN_MASK;
}
/*
* Request exclusive access to a hash bucket for a given dma_debug_entry.
*/
static struct hash_bucket *get_hash_bucket(struct dma_debug_entry *entry,
unsigned long *flags)
{
int idx = hash_fn(entry);
unsigned long __flags;
spin_lock_irqsave(&dma_entry_hash[idx].lock, __flags);
*flags = __flags;
return &dma_entry_hash[idx];
}
/*
* Give up exclusive access to the hash bucket
*/
static void put_hash_bucket(struct hash_bucket *bucket,
unsigned long *flags)
{
unsigned long __flags = *flags;
spin_unlock_irqrestore(&bucket->lock, __flags);
}
/*
* Search a given entry in the hash bucket list
*/
static struct dma_debug_entry *hash_bucket_find(struct hash_bucket *bucket,
struct dma_debug_entry *ref)
{
struct dma_debug_entry *entry;
list_for_each_entry(entry, &bucket->list, list) {
if ((entry->dev_addr == ref->dev_addr) &&
(entry->dev == ref->dev))
return entry;
}
return NULL;
}
/*
* Add an entry to a hash bucket
*/
static void hash_bucket_add(struct hash_bucket *bucket,
struct dma_debug_entry *entry)
{
list_add_tail(&entry->list, &bucket->list);
}
/*
* Remove entry from a hash bucket list
*/
static void hash_bucket_del(struct dma_debug_entry *entry)
{
list_del(&entry->list);
}
/*
* Dump mapping entries for debugging purposes
*/
void debug_dma_dump_mappings(struct device *dev)
{
int idx;
for (idx = 0; idx < HASH_SIZE; idx++) {
struct hash_bucket *bucket = &dma_entry_hash[idx];
struct dma_debug_entry *entry;
unsigned long flags;
spin_lock_irqsave(&bucket->lock, flags);
list_for_each_entry(entry, &bucket->list, list) {
if (!dev || dev == entry->dev) {
dev_info(entry->dev,
"%s idx %d P=%Lx D=%Lx L=%Lx %s\n",
type2name[entry->type], idx,
(unsigned long long)entry->paddr,
entry->dev_addr, entry->size,
dir2name[entry->direction]);
}
}
spin_unlock_irqrestore(&bucket->lock, flags);
}
}
EXPORT_SYMBOL(debug_dma_dump_mappings);
/*
* Wrapper function for adding an entry to the hash.
* This function takes care of locking itself.
*/
static void add_dma_entry(struct dma_debug_entry *entry)
{
struct hash_bucket *bucket;
unsigned long flags;
bucket = get_hash_bucket(entry, &flags);
hash_bucket_add(bucket, entry);
put_hash_bucket(bucket, &flags);
}
/* struct dma_entry allocator
*
* The next two functions implement the allocator for
* struct dma_debug_entries.
*/
static struct dma_debug_entry *dma_entry_alloc(void)
{
struct dma_debug_entry *entry = NULL;
unsigned long flags;
spin_lock_irqsave(&free_entries_lock, flags);
if (list_empty(&free_entries)) {
printk(KERN_ERR "DMA-API: debugging out of memory "
"- disabling\n");
global_disable = true;
goto out;
}
entry = list_entry(free_entries.next, struct dma_debug_entry, list);
list_del(&entry->list);
memset(entry, 0, sizeof(*entry));
#ifdef CONFIG_STACKTRACE
entry->stacktrace.max_entries = DMA_DEBUG_STACKTRACE_ENTRIES;
entry->stacktrace.entries = entry->st_entries;
entry->stacktrace.skip = 2;
save_stack_trace(&entry->stacktrace);
#endif
num_free_entries -= 1;
if (num_free_entries < min_free_entries)
min_free_entries = num_free_entries;
out:
spin_unlock_irqrestore(&free_entries_lock, flags);
return entry;
}
static void dma_entry_free(struct dma_debug_entry *entry)
{
unsigned long flags;
/*
* add to beginning of the list - this way the entries are
* more likely cache hot when they are reallocated.
*/
spin_lock_irqsave(&free_entries_lock, flags);
list_add(&entry->list, &free_entries);
num_free_entries += 1;
spin_unlock_irqrestore(&free_entries_lock, flags);
}
/*
* DMA-API debugging init code
*
* The init code does two things:
* 1. Initialize core data structures
* 2. Preallocate a given number of dma_debug_entry structs
*/
static int prealloc_memory(u32 num_entries)
{
struct dma_debug_entry *entry, *next_entry;
int i;
for (i = 0; i < num_entries; ++i) {
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
goto out_err;
list_add_tail(&entry->list, &free_entries);
}
num_free_entries = num_entries;
min_free_entries = num_entries;
printk(KERN_INFO "DMA-API: preallocated %d debug entries\n",
num_entries);
return 0;
out_err:
list_for_each_entry_safe(entry, next_entry, &free_entries, list) {
list_del(&entry->list);
kfree(entry);
}
return -ENOMEM;
}
static int dma_debug_fs_init(void)
{
dma_debug_dent = debugfs_create_dir("dma-api", NULL);
if (!dma_debug_dent) {
printk(KERN_ERR "DMA-API: can not create debugfs directory\n");
return -ENOMEM;
}
global_disable_dent = debugfs_create_bool("disabled", 0444,
dma_debug_dent,
(u32 *)&global_disable);
if (!global_disable_dent)
goto out_err;
error_count_dent = debugfs_create_u32("error_count", 0444,
dma_debug_dent, &error_count);
if (!error_count_dent)
goto out_err;
show_all_errors_dent = debugfs_create_u32("all_errors", 0644,
dma_debug_dent,
&show_all_errors);
if (!show_all_errors_dent)
goto out_err;
show_num_errors_dent = debugfs_create_u32("num_errors", 0644,
dma_debug_dent,
&show_num_errors);
if (!show_num_errors_dent)
goto out_err;
num_free_entries_dent = debugfs_create_u32("num_free_entries", 0444,
dma_debug_dent,
&num_free_entries);
if (!num_free_entries_dent)
goto out_err;
min_free_entries_dent = debugfs_create_u32("min_free_entries", 0444,
dma_debug_dent,
&min_free_entries);
if (!min_free_entries_dent)
goto out_err;
return 0;
out_err:
debugfs_remove_recursive(dma_debug_dent);
return -ENOMEM;
}
static int device_dma_allocations(struct device *dev)
{
struct dma_debug_entry *entry;
unsigned long flags;
int count = 0, i;
for (i = 0; i < HASH_SIZE; ++i) {
spin_lock_irqsave(&dma_entry_hash[i].lock, flags);
list_for_each_entry(entry, &dma_entry_hash[i].list, list) {
if (entry->dev == dev)
count += 1;
}
spin_unlock_irqrestore(&dma_entry_hash[i].lock, flags);
}
return count;
}
static int dma_debug_device_change(struct notifier_block *nb,
unsigned long action, void *data)
{
struct device *dev = data;
int count;
switch (action) {
case BUS_NOTIFY_UNBIND_DRIVER:
count = device_dma_allocations(dev);
if (count == 0)
break;
err_printk(dev, NULL, "DMA-API: device driver has pending "
"DMA allocations while released from device "
"[count=%d]\n", count);
break;
default:
break;
}
return 0;
}
void dma_debug_add_bus(struct bus_type *bus)
{
struct notifier_block *nb;
nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
if (nb == NULL) {
printk(KERN_ERR "dma_debug_add_bus: out of memory\n");
return;
}
nb->notifier_call = dma_debug_device_change;
bus_register_notifier(bus, nb);
}
/*
* Let the architectures decide how many entries should be preallocated.
*/
void dma_debug_init(u32 num_entries)
{
int i;
if (global_disable)
return;
for (i = 0; i < HASH_SIZE; ++i) {
INIT_LIST_HEAD(&dma_entry_hash[i].list);
dma_entry_hash[i].lock = SPIN_LOCK_UNLOCKED;
}
if (dma_debug_fs_init() != 0) {
printk(KERN_ERR "DMA-API: error creating debugfs entries "
"- disabling\n");
global_disable = true;
return;
}
if (req_entries)
num_entries = req_entries;
if (prealloc_memory(num_entries) != 0) {
printk(KERN_ERR "DMA-API: debugging out of memory error "
"- disabled\n");
global_disable = true;
return;
}
printk(KERN_INFO "DMA-API: debugging enabled by kernel config\n");
}
static __init int dma_debug_cmdline(char *str)
{
if (!str)
return -EINVAL;
if (strncmp(str, "off", 3) == 0) {
printk(KERN_INFO "DMA-API: debugging disabled on kernel "
"command line\n");
global_disable = true;
}
return 0;
}
static __init int dma_debug_entries_cmdline(char *str)
{
int res;
if (!str)
return -EINVAL;
res = get_option(&str, &req_entries);
if (!res)
req_entries = 0;
return 0;
}
__setup("dma_debug=", dma_debug_cmdline);
__setup("dma_debug_entries=", dma_debug_entries_cmdline);
static void check_unmap(struct dma_debug_entry *ref)
{
struct dma_debug_entry *entry;
struct hash_bucket *bucket;
unsigned long flags;
if (dma_mapping_error(ref->dev, ref->dev_addr)) {
err_printk(ref->dev, NULL, "DMA-API: device driver tries "
"to free an invalid DMA memory address\n");
return;
}
bucket = get_hash_bucket(ref, &flags);
entry = hash_bucket_find(bucket, ref);
if (!entry) {
err_printk(ref->dev, NULL, "DMA-API: device driver tries "
"to free DMA memory it has not allocated "
"[device address=0x%016llx] [size=%llu bytes]\n",
ref->dev_addr, ref->size);
goto out;
}
if (ref->size != entry->size) {
err_printk(ref->dev, entry, "DMA-API: device driver frees "
"DMA memory with different size "
"[device address=0x%016llx] [map size=%llu bytes] "
"[unmap size=%llu bytes]\n",
ref->dev_addr, entry->size, ref->size);
}
if (ref->type != entry->type) {
err_printk(ref->dev, entry, "DMA-API: device driver frees "
"DMA memory with wrong function "
"[device address=0x%016llx] [size=%llu bytes] "
"[mapped as %s] [unmapped as %s]\n",
ref->dev_addr, ref->size,
type2name[entry->type], type2name[ref->type]);
} else if ((entry->type == dma_debug_coherent) &&
(ref->paddr != entry->paddr)) {
err_printk(ref->dev, entry, "DMA-API: device driver frees "
"DMA memory with different CPU address "
"[device address=0x%016llx] [size=%llu bytes] "
"[cpu alloc address=%p] [cpu free address=%p]",
ref->dev_addr, ref->size,
(void *)entry->paddr, (void *)ref->paddr);
}
if (ref->sg_call_ents && ref->type == dma_debug_sg &&
ref->sg_call_ents != entry->sg_call_ents) {
err_printk(ref->dev, entry, "DMA-API: device driver frees "
"DMA sg list with different entry count "
"[map count=%d] [unmap count=%d]\n",
entry->sg_call_ents, ref->sg_call_ents);
}
/*
* This may be no bug in reality - but most implementations of the
* DMA API don't handle this properly, so check for it here
*/
if (ref->direction != entry->direction) {
err_printk(ref->dev, entry, "DMA-API: device driver frees "
"DMA memory with different direction "
"[device address=0x%016llx] [size=%llu bytes] "
"[mapped with %s] [unmapped with %s]\n",
ref->dev_addr, ref->size,
dir2name[entry->direction],
dir2name[ref->direction]);
}
hash_bucket_del(entry);
dma_entry_free(entry);
out:
put_hash_bucket(bucket, &flags);
}
static void check_for_stack(struct device *dev, void *addr)
{
if (object_is_on_stack(addr))
err_printk(dev, NULL, "DMA-API: device driver maps memory from"
"stack [addr=%p]\n", addr);
}
static inline bool overlap(void *addr, u64 size, void *start, void *end)
{
void *addr2 = (char *)addr + size;
return ((addr >= start && addr < end) ||
(addr2 >= start && addr2 < end) ||
((addr < start) && (addr2 >= end)));
}
static void check_for_illegal_area(struct device *dev, void *addr, u64 size)
{
if (overlap(addr, size, _text, _etext) ||
overlap(addr, size, __start_rodata, __end_rodata))
err_printk(dev, NULL, "DMA-API: device driver maps "
"memory from kernel text or rodata "
"[addr=%p] [size=%llu]\n", addr, size);
}
static void check_sync(struct device *dev, dma_addr_t addr,
u64 size, u64 offset, int direction, bool to_cpu)
{
struct dma_debug_entry ref = {
.dev = dev,
.dev_addr = addr,
.size = size,
.direction = direction,
};
struct dma_debug_entry *entry;
struct hash_bucket *bucket;
unsigned long flags;
bucket = get_hash_bucket(&ref, &flags);
entry = hash_bucket_find(bucket, &ref);
if (!entry) {
err_printk(dev, NULL, "DMA-API: device driver tries "
"to sync DMA memory it has not allocated "
"[device address=0x%016llx] [size=%llu bytes]\n",
addr, size);
goto out;
}
if ((offset + size) > entry->size) {
err_printk(dev, entry, "DMA-API: device driver syncs"
" DMA memory outside allocated range "
"[device address=0x%016llx] "
"[allocation size=%llu bytes] [sync offset=%llu] "
"[sync size=%llu]\n", entry->dev_addr, entry->size,
offset, size);
}
if (direction != entry->direction) {
err_printk(dev, entry, "DMA-API: device driver syncs "
"DMA memory with different direction "
"[device address=0x%016llx] [size=%llu bytes] "
"[mapped with %s] [synced with %s]\n",
addr, entry->size,
dir2name[entry->direction],
dir2name[direction]);
}
if (entry->direction == DMA_BIDIRECTIONAL)
goto out;
if (to_cpu && !(entry->direction == DMA_FROM_DEVICE) &&
!(direction == DMA_TO_DEVICE))
err_printk(dev, entry, "DMA-API: device driver syncs "
"device read-only DMA memory for cpu "
"[device address=0x%016llx] [size=%llu bytes] "
"[mapped with %s] [synced with %s]\n",
addr, entry->size,
dir2name[entry->direction],
dir2name[direction]);
if (!to_cpu && !(entry->direction == DMA_TO_DEVICE) &&
!(direction == DMA_FROM_DEVICE))
err_printk(dev, entry, "DMA-API: device driver syncs "
"device write-only DMA memory to device "
"[device address=0x%016llx] [size=%llu bytes] "
"[mapped with %s] [synced with %s]\n",
addr, entry->size,
dir2name[entry->direction],
dir2name[direction]);
out:
put_hash_bucket(bucket, &flags);
}
void debug_dma_map_page(struct device *dev, struct page *page, size_t offset,
size_t size, int direction, dma_addr_t dma_addr,
bool map_single)
{
struct dma_debug_entry *entry;
if (unlikely(global_disable))
return;
if (unlikely(dma_mapping_error(dev, dma_addr)))
return;
entry = dma_entry_alloc();
if (!entry)
return;
entry->dev = dev;
entry->type = dma_debug_page;
entry->paddr = page_to_phys(page) + offset;
entry->dev_addr = dma_addr;
entry->size = size;
entry->direction = direction;
if (map_single)
entry->type = dma_debug_single;
if (!PageHighMem(page)) {
void *addr = ((char *)page_address(page)) + offset;
check_for_stack(dev, addr);
check_for_illegal_area(dev, addr, size);
}
add_dma_entry(entry);
}
EXPORT_SYMBOL(debug_dma_map_page);
void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
size_t size, int direction, bool map_single)
{
struct dma_debug_entry ref = {
.type = dma_debug_page,
.dev = dev,
.dev_addr = addr,
.size = size,
.direction = direction,
};
if (unlikely(global_disable))
return;
if (map_single)
ref.type = dma_debug_single;
check_unmap(&ref);
}
EXPORT_SYMBOL(debug_dma_unmap_page);
void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, int mapped_ents, int direction)
{
struct dma_debug_entry *entry;
struct scatterlist *s;
int i;
if (unlikely(global_disable))
return;
for_each_sg(sg, s, mapped_ents, i) {
entry = dma_entry_alloc();
if (!entry)
return;
entry->type = dma_debug_sg;
entry->dev = dev;
entry->paddr = sg_phys(s);
entry->size = s->length;
entry->dev_addr = s->dma_address;
entry->direction = direction;
entry->sg_call_ents = nents;
entry->sg_mapped_ents = mapped_ents;
if (!PageHighMem(sg_page(s))) {
check_for_stack(dev, sg_virt(s));
check_for_illegal_area(dev, sg_virt(s), s->length);
}
add_dma_entry(entry);
}
}
EXPORT_SYMBOL(debug_dma_map_sg);
void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems, int dir)
{
struct dma_debug_entry *entry;
struct scatterlist *s;
int mapped_ents = 0, i;
unsigned long flags;
if (unlikely(global_disable))
return;
for_each_sg(sglist, s, nelems, i) {
struct dma_debug_entry ref = {
.type = dma_debug_sg,
.dev = dev,
.paddr = sg_phys(s),
.dev_addr = s->dma_address,
.size = s->length,
.direction = dir,
.sg_call_ents = 0,
};
if (mapped_ents && i >= mapped_ents)
break;
if (mapped_ents == 0) {
struct hash_bucket *bucket;
ref.sg_call_ents = nelems;
bucket = get_hash_bucket(&ref, &flags);
entry = hash_bucket_find(bucket, &ref);
if (entry)
mapped_ents = entry->sg_mapped_ents;
put_hash_bucket(bucket, &flags);
}
check_unmap(&ref);
}
}
EXPORT_SYMBOL(debug_dma_unmap_sg);
void debug_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t dma_addr, void *virt)
{
struct dma_debug_entry *entry;
if (unlikely(global_disable))
return;
if (unlikely(virt == NULL))
return;
entry = dma_entry_alloc();
if (!entry)
return;
entry->type = dma_debug_coherent;
entry->dev = dev;
entry->paddr = virt_to_phys(virt);
entry->size = size;
entry->dev_addr = dma_addr;
entry->direction = DMA_BIDIRECTIONAL;
add_dma_entry(entry);
}
EXPORT_SYMBOL(debug_dma_alloc_coherent);
void debug_dma_free_coherent(struct device *dev, size_t size,
void *virt, dma_addr_t addr)
{
struct dma_debug_entry ref = {
.type = dma_debug_coherent,
.dev = dev,
.paddr = virt_to_phys(virt),
.dev_addr = addr,
.size = size,
.direction = DMA_BIDIRECTIONAL,
};
if (unlikely(global_disable))
return;
check_unmap(&ref);
}
EXPORT_SYMBOL(debug_dma_free_coherent);
void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, int direction)
{
if (unlikely(global_disable))
return;
check_sync(dev, dma_handle, size, 0, direction, true);
}
EXPORT_SYMBOL(debug_dma_sync_single_for_cpu);
void debug_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size,
int direction)
{
if (unlikely(global_disable))
return;
check_sync(dev, dma_handle, size, 0, direction, false);
}
EXPORT_SYMBOL(debug_dma_sync_single_for_device);
void debug_dma_sync_single_range_for_cpu(struct device *dev,
dma_addr_t dma_handle,
unsigned long offset, size_t size,
int direction)
{
if (unlikely(global_disable))
return;
check_sync(dev, dma_handle, size, offset, direction, true);
}
EXPORT_SYMBOL(debug_dma_sync_single_range_for_cpu);
void debug_dma_sync_single_range_for_device(struct device *dev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size, int direction)
{
if (unlikely(global_disable))
return;
check_sync(dev, dma_handle, size, offset, direction, false);
}
EXPORT_SYMBOL(debug_dma_sync_single_range_for_device);
void debug_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nelems, int direction)
{
struct scatterlist *s;
int i;
if (unlikely(global_disable))
return;
for_each_sg(sg, s, nelems, i) {
check_sync(dev, s->dma_address, s->dma_length, 0,
direction, true);
}
}
EXPORT_SYMBOL(debug_dma_sync_sg_for_cpu);
void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int nelems, int direction)
{
struct scatterlist *s;
int i;
if (unlikely(global_disable))
return;
for_each_sg(sg, s, nelems, i) {
check_sync(dev, s->dma_address, s->dma_length, 0,
direction, false);
}
}
EXPORT_SYMBOL(debug_dma_sync_sg_for_device);

86
lib/swiotlb.c
View file

@ -145,7 +145,7 @@ static void *swiotlb_bus_to_virt(dma_addr_t address)
return phys_to_virt(swiotlb_bus_to_phys(address));
}
int __weak swiotlb_arch_range_needs_mapping(void *ptr, size_t size)
int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
{
return 0;
}
@ -315,9 +315,9 @@ address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
}
static inline int range_needs_mapping(void *ptr, size_t size)
static inline int range_needs_mapping(phys_addr_t paddr, size_t size)
{
return swiotlb_force || swiotlb_arch_range_needs_mapping(ptr, size);
return swiotlb_force || swiotlb_arch_range_needs_mapping(paddr, size);
}
static int is_swiotlb_buffer(char *addr)
@ -636,11 +636,14 @@ swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
* Once the device is given the dma address, the device owns this memory until
* either swiotlb_unmap_single or swiotlb_dma_sync_single is performed.
*/
dma_addr_t
swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
int dir, struct dma_attrs *attrs)
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)
{
dma_addr_t dev_addr = swiotlb_virt_to_bus(hwdev, ptr);
phys_addr_t phys = page_to_phys(page) + offset;
void *ptr = page_address(page) + offset;
dma_addr_t dev_addr = swiotlb_phys_to_bus(dev, phys);
void *map;
BUG_ON(dir == DMA_NONE);
@ -649,37 +652,30 @@ swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
* we can safely return the device addr and not worry about bounce
* buffering it.
*/
if (!address_needs_mapping(hwdev, dev_addr, size) &&
!range_needs_mapping(ptr, size))
if (!address_needs_mapping(dev, dev_addr, size) &&
!range_needs_mapping(virt_to_phys(ptr), size))
return dev_addr;
/*
* Oh well, have to allocate and map a bounce buffer.
*/
map = map_single(hwdev, virt_to_phys(ptr), size, dir);
map = map_single(dev, phys, size, dir);
if (!map) {
swiotlb_full(hwdev, size, dir, 1);
swiotlb_full(dev, size, dir, 1);
map = io_tlb_overflow_buffer;
}
dev_addr = swiotlb_virt_to_bus(hwdev, map);
dev_addr = swiotlb_virt_to_bus(dev, map);
/*
* Ensure that the address returned is DMA'ble
*/
if (address_needs_mapping(hwdev, dev_addr, size))
if (address_needs_mapping(dev, dev_addr, size))
panic("map_single: bounce buffer is not DMA'ble");
return dev_addr;
}
EXPORT_SYMBOL(swiotlb_map_single_attrs);
dma_addr_t
swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir)
{
return swiotlb_map_single_attrs(hwdev, ptr, size, dir, NULL);
}
EXPORT_SYMBOL(swiotlb_map_single);
EXPORT_SYMBOL_GPL(swiotlb_map_page);
/*
* Unmap a single streaming mode DMA translation. The dma_addr and size must
@ -689,9 +685,9 @@ EXPORT_SYMBOL(swiotlb_map_single);
* After this call, reads by the cpu to the buffer are guaranteed to see
* whatever the device wrote there.
*/
void
swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir, struct dma_attrs *attrs)
void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
char *dma_addr = swiotlb_bus_to_virt(dev_addr);
@ -701,15 +697,7 @@ swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(dma_addr, size);
}
EXPORT_SYMBOL(swiotlb_unmap_single_attrs);
void
swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size,
int dir)
{
return swiotlb_unmap_single_attrs(hwdev, dev_addr, size, dir, NULL);
}
EXPORT_SYMBOL(swiotlb_unmap_single);
EXPORT_SYMBOL_GPL(swiotlb_unmap_page);
/*
* Make physical memory consistent for a single streaming mode DMA translation
@ -736,7 +724,7 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
void
swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir)
size_t size, enum dma_data_direction dir)
{
swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_CPU);
}
@ -744,7 +732,7 @@ EXPORT_SYMBOL(swiotlb_sync_single_for_cpu);
void
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir)
size_t size, enum dma_data_direction dir)
{
swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_DEVICE);
}
@ -769,7 +757,8 @@ swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
void
swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
unsigned long offset, size_t size, int dir)
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
SYNC_FOR_CPU);
@ -778,7 +767,8 @@ EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_cpu);
void
swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
unsigned long offset, size_t size, int dir)
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
SYNC_FOR_DEVICE);
@ -803,7 +793,7 @@ EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_device);
*/
int
swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
int dir, struct dma_attrs *attrs)
enum dma_data_direction dir, struct dma_attrs *attrs)
{
struct scatterlist *sg;
int i;
@ -811,10 +801,10 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
BUG_ON(dir == DMA_NONE);
for_each_sg(sgl, sg, nelems, i) {
void *addr = sg_virt(sg);
dma_addr_t dev_addr = swiotlb_virt_to_bus(hwdev, addr);
phys_addr_t paddr = sg_phys(sg);
dma_addr_t dev_addr = swiotlb_phys_to_bus(hwdev, paddr);
if (range_needs_mapping(addr, sg->length) ||
if (range_needs_mapping(paddr, sg->length) ||
address_needs_mapping(hwdev, dev_addr, sg->length)) {
void *map = map_single(hwdev, sg_phys(sg),
sg->length, dir);
@ -850,7 +840,7 @@ EXPORT_SYMBOL(swiotlb_map_sg);
*/
void
swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
int nelems, int dir, struct dma_attrs *attrs)
int nelems, enum dma_data_direction dir, struct dma_attrs *attrs)
{
struct scatterlist *sg;
int i;
@ -858,11 +848,11 @@ swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
BUG_ON(dir == DMA_NONE);
for_each_sg(sgl, sg, nelems, i) {
if (sg->dma_address != swiotlb_virt_to_bus(hwdev, sg_virt(sg)))
if (sg->dma_address != swiotlb_phys_to_bus(hwdev, sg_phys(sg)))
unmap_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
sg->dma_length, dir);
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(sg_virt(sg), sg->dma_length);
dma_mark_clean(swiotlb_bus_to_virt(sg->dma_address), sg->dma_length);
}
}
EXPORT_SYMBOL(swiotlb_unmap_sg_attrs);
@ -892,17 +882,17 @@ swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl,
BUG_ON(dir == DMA_NONE);
for_each_sg(sgl, sg, nelems, i) {
if (sg->dma_address != swiotlb_virt_to_bus(hwdev, sg_virt(sg)))
if (sg->dma_address != swiotlb_phys_to_bus(hwdev, sg_phys(sg)))
sync_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
sg->dma_length, dir, target);
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(sg_virt(sg), sg->dma_length);
dma_mark_clean(swiotlb_bus_to_virt(sg->dma_address), sg->dma_length);
}
}
void
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir)
int nelems, enum dma_data_direction dir)
{
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_CPU);
}
@ -910,7 +900,7 @@ EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu);
void
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir)
int nelems, enum dma_data_direction dir)
{
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE);
}