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-rw-r--r--arch/arm/common/Kconfig3
-rw-r--r--arch/arm/common/dmabounce.c287
-rw-r--r--arch/arm/common/gic.c2
-rw-r--r--arch/arm/common/locomo.c2
-rw-r--r--arch/arm/common/sa1111.c2
-rw-r--r--arch/arm/common/scoop.c2
-rw-r--r--arch/arm/common/time-acorn.c2
-rw-r--r--arch/arm/common/uengine.c2
-rw-r--r--arch/arm/common/via82c505.c2
-rw-r--r--arch/arm/common/vic.c2
10 files changed, 94 insertions, 212 deletions
diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig
index 3e073467cac..2e32acca02f 100644
--- a/arch/arm/common/Kconfig
+++ b/arch/arm/common/Kconfig
@@ -12,7 +12,8 @@ config ICST307
config SA1111
bool
- select DMABOUNCE
+ select DMABOUNCE if !ARCH_PXA
+ select ZONE_DMA if !ARCH_PXA
config DMABOUNCE
bool
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index aecc6c3f908..f030f0775be 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -154,9 +154,7 @@ alloc_safe_buffer(struct dmabounce_device_info *device_info, void *ptr,
#endif
write_lock_irqsave(&device_info->lock, flags);
-
list_add(&buf->node, &device_info->safe_buffers);
-
write_unlock_irqrestore(&device_info->lock, flags);
return buf;
@@ -205,8 +203,22 @@ free_safe_buffer(struct dmabounce_device_info *device_info, struct safe_buffer *
/* ************************************************** */
-static inline dma_addr_t
-map_single(struct device *dev, void *ptr, size_t size,
+static struct safe_buffer *find_safe_buffer_dev(struct device *dev,
+ dma_addr_t dma_addr, const char *where)
+{
+ if (!dev || !dev->archdata.dmabounce)
+ return NULL;
+ if (dma_mapping_error(dev, dma_addr)) {
+ if (dev)
+ dev_err(dev, "Trying to %s invalid mapping\n", where);
+ else
+ pr_err("unknown device: Trying to %s invalid mapping\n", where);
+ return NULL;
+ }
+ return find_safe_buffer(dev->archdata.dmabounce, dma_addr);
+}
+
+static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction dir)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
@@ -270,33 +282,21 @@ map_single(struct device *dev, void *ptr, size_t size,
return dma_addr;
}
-static inline void
-unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction dir)
+static inline void unmap_single(struct device *dev, dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction dir)
{
- struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
- struct safe_buffer *buf = NULL;
-
- /*
- * Trying to unmap an invalid mapping
- */
- if (dma_mapping_error(dev, dma_addr)) {
- dev_err(dev, "Trying to unmap invalid mapping\n");
- return;
- }
-
- if (device_info)
- buf = find_safe_buffer(device_info, dma_addr);
+ struct safe_buffer *buf = find_safe_buffer_dev(dev, dma_addr, "unmap");
if (buf) {
BUG_ON(buf->size != size);
+ BUG_ON(buf->direction != dir);
dev_dbg(dev,
"%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
__func__, buf->ptr, virt_to_dma(dev, buf->ptr),
buf->safe, buf->safe_dma_addr);
- DO_STATS ( device_info->bounce_count++ );
+ DO_STATS(dev->archdata.dmabounce->bounce_count++);
if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) {
void *ptr = buf->ptr;
@@ -317,74 +317,7 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
dmac_clean_range(ptr, ptr + size);
outer_clean_range(__pa(ptr), __pa(ptr) + size);
}
- free_safe_buffer(device_info, buf);
- }
-}
-
-static int sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction dir)
-{
- struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
- struct safe_buffer *buf = NULL;
-
- if (device_info)
- buf = find_safe_buffer(device_info, dma_addr);
-
- if (buf) {
- /*
- * Both of these checks from original code need to be
- * commented out b/c some drivers rely on the following:
- *
- * 1) Drivers may map a large chunk of memory into DMA space
- * but only sync a small portion of it. Good example is
- * allocating a large buffer, mapping it, and then
- * breaking it up into small descriptors. No point
- * in syncing the whole buffer if you only have to
- * touch one descriptor.
- *
- * 2) Buffers that are mapped as DMA_BIDIRECTIONAL are
- * usually only synced in one dir at a time.
- *
- * See drivers/net/eepro100.c for examples of both cases.
- *
- * -ds
- *
- * BUG_ON(buf->size != size);
- * BUG_ON(buf->direction != dir);
- */
-
- dev_dbg(dev,
- "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
- __func__, buf->ptr, virt_to_dma(dev, buf->ptr),
- buf->safe, buf->safe_dma_addr);
-
- DO_STATS ( device_info->bounce_count++ );
-
- switch (dir) {
- case DMA_FROM_DEVICE:
- dev_dbg(dev,
- "%s: copy back safe %p to unsafe %p size %d\n",
- __func__, buf->safe, buf->ptr, size);
- memcpy(buf->ptr, buf->safe, size);
- break;
- case DMA_TO_DEVICE:
- dev_dbg(dev,
- "%s: copy out unsafe %p to safe %p, size %d\n",
- __func__,buf->ptr, buf->safe, size);
- memcpy(buf->safe, buf->ptr, size);
- break;
- case DMA_BIDIRECTIONAL:
- BUG(); /* is this allowed? what does it mean? */
- default:
- BUG();
- }
- /*
- * No need to sync the safe buffer - it was allocated
- * via the coherent allocators.
- */
- return 0;
- } else {
- return 1;
+ free_safe_buffer(dev->archdata.dmabounce, buf);
}
}
@@ -396,21 +329,29 @@ static int sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
* substitute the safe buffer for the unsafe one.
* (basically move the buffer from an unsafe area to a safe one)
*/
-dma_addr_t
-dma_map_single(struct device *dev, void *ptr, size_t size,
+dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction dir)
{
- dma_addr_t dma_addr;
-
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, ptr, size, dir);
- BUG_ON(dir == DMA_NONE);
+ BUG_ON(!valid_dma_direction(dir));
- dma_addr = map_single(dev, ptr, size, dir);
+ return map_single(dev, ptr, size, dir);
+}
+EXPORT_SYMBOL(dma_map_single);
- return dma_addr;
+dma_addr_t dma_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size, enum dma_data_direction dir)
+{
+ dev_dbg(dev, "%s(page=%p,off=%#lx,size=%zx,dir=%x)\n",
+ __func__, page, offset, size, dir);
+
+ BUG_ON(!valid_dma_direction(dir));
+
+ return map_single(dev, page_address(page) + offset, size, dir);
}
+EXPORT_SYMBOL(dma_map_page);
/*
* see if a mapped address was really a "safe" buffer and if so, copy
@@ -419,126 +360,76 @@ dma_map_single(struct device *dev, void *ptr, size_t size,
* should be)
*/
-void
-dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction dir)
+void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+ enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, (void *) dma_addr, size, dir);
- BUG_ON(dir == DMA_NONE);
-
unmap_single(dev, dma_addr, size, dir);
}
+EXPORT_SYMBOL(dma_unmap_single);
-int
-dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction dir)
+int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
+ unsigned long off, size_t sz, enum dma_data_direction dir)
{
- int i;
-
- dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
- __func__, sg, nents, dir);
-
- BUG_ON(dir == DMA_NONE);
-
- for (i = 0; i < nents; i++, sg++) {
- struct page *page = sg_page(sg);
- unsigned int offset = sg->offset;
- unsigned int length = sg->length;
- void *ptr = page_address(page) + offset;
+ struct safe_buffer *buf;
- sg->dma_address =
- map_single(dev, ptr, length, dir);
- }
+ dev_dbg(dev, "%s(dma=%#x,off=%#lx,sz=%zx,dir=%x)\n",
+ __func__, addr, off, sz, dir);
- return nents;
-}
-
-void
-dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction dir)
-{
- int i;
+ buf = find_safe_buffer_dev(dev, addr, __func__);
+ if (!buf)
+ return 1;
- dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
- __func__, sg, nents, dir);
+ BUG_ON(buf->direction != dir);
- BUG_ON(dir == DMA_NONE);
+ dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
+ __func__, buf->ptr, virt_to_dma(dev, buf->ptr),
+ buf->safe, buf->safe_dma_addr);
- for (i = 0; i < nents; i++, sg++) {
- dma_addr_t dma_addr = sg->dma_address;
- unsigned int length = sg->length;
+ DO_STATS(dev->archdata.dmabounce->bounce_count++);
- unmap_single(dev, dma_addr, length, dir);
+ if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) {
+ dev_dbg(dev, "%s: copy back safe %p to unsafe %p size %d\n",
+ __func__, buf->safe + off, buf->ptr + off, sz);
+ memcpy(buf->ptr + off, buf->safe + off, sz);
}
+ return 0;
}
+EXPORT_SYMBOL(dmabounce_sync_for_cpu);
-void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_addr,
- unsigned long offset, size_t size,
- enum dma_data_direction dir)
-{
- dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n",
- __func__, dma_addr, offset, size, dir);
-
- if (sync_single(dev, dma_addr, offset + size, dir))
- dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir);
-}
-EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
-
-void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_addr,
- unsigned long offset, size_t size,
- enum dma_data_direction dir)
-{
- dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n",
- __func__, dma_addr, offset, size, dir);
-
- if (sync_single(dev, dma_addr, offset + size, dir))
- dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir);
-}
-EXPORT_SYMBOL(dma_sync_single_range_for_device);
-
-void
-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction dir)
+int dmabounce_sync_for_device(struct device *dev, dma_addr_t addr,
+ unsigned long off, size_t sz, enum dma_data_direction dir)
{
- int i;
-
- dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
- __func__, sg, nents, dir);
-
- BUG_ON(dir == DMA_NONE);
+ struct safe_buffer *buf;
- for (i = 0; i < nents; i++, sg++) {
- dma_addr_t dma_addr = sg->dma_address;
- unsigned int length = sg->length;
+ dev_dbg(dev, "%s(dma=%#x,off=%#lx,sz=%zx,dir=%x)\n",
+ __func__, addr, off, sz, dir);
- sync_single(dev, dma_addr, length, dir);
- }
-}
-
-void
-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction dir)
-{
- int i;
+ buf = find_safe_buffer_dev(dev, addr, __func__);
+ if (!buf)
+ return 1;
- dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
- __func__, sg, nents, dir);
+ BUG_ON(buf->direction != dir);
- BUG_ON(dir == DMA_NONE);
+ dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
+ __func__, buf->ptr, virt_to_dma(dev, buf->ptr),
+ buf->safe, buf->safe_dma_addr);
- for (i = 0; i < nents; i++, sg++) {
- dma_addr_t dma_addr = sg->dma_address;
- unsigned int length = sg->length;
+ DO_STATS(dev->archdata.dmabounce->bounce_count++);
- sync_single(dev, dma_addr, length, dir);
+ if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) {
+ dev_dbg(dev, "%s: copy out unsafe %p to safe %p, size %d\n",
+ __func__,buf->ptr + off, buf->safe + off, sz);
+ memcpy(buf->safe + off, buf->ptr + off, sz);
}
+ return 0;
}
+EXPORT_SYMBOL(dmabounce_sync_for_device);
-static int
-dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev, const char *name,
- unsigned long size)
+static int dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev,
+ const char *name, unsigned long size)
{
pool->size = size;
DO_STATS(pool->allocs = 0);
@@ -549,9 +440,8 @@ dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev, const char
return pool->pool ? 0 : -ENOMEM;
}
-int
-dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
- unsigned long large_buffer_size)
+int dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
+ unsigned long large_buffer_size)
{
struct dmabounce_device_info *device_info;
int ret;
@@ -607,9 +497,9 @@ dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
kfree(device_info);
return ret;
}
+EXPORT_SYMBOL(dmabounce_register_dev);
-void
-dmabounce_unregister_dev(struct device *dev)
+void dmabounce_unregister_dev(struct device *dev)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
@@ -642,15 +532,6 @@ dmabounce_unregister_dev(struct device *dev)
dev_info(dev, "dmabounce: device unregistered\n");
}
-
-
-EXPORT_SYMBOL(dma_map_single);
-EXPORT_SYMBOL(dma_unmap_single);
-EXPORT_SYMBOL(dma_map_sg);
-EXPORT_SYMBOL(dma_unmap_sg);
-EXPORT_SYMBOL(dma_sync_sg_for_cpu);
-EXPORT_SYMBOL(dma_sync_sg_for_device);
-EXPORT_SYMBOL(dmabounce_register_dev);
EXPORT_SYMBOL(dmabounce_unregister_dev);
MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>, Deepak Saxena <dsaxena@plexity.net>");
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index 0c89bd35e06..7fc9860a97d 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -27,9 +27,9 @@
#include <linux/list.h>
#include <linux/smp.h>
#include <linux/cpumask.h>
+#include <linux/io.h>
#include <asm/irq.h>
-#include <asm/io.h>
#include <asm/mach/irq.h>
#include <asm/hardware/gic.h>
diff --git a/arch/arm/common/locomo.c b/arch/arm/common/locomo.c
index 283051eaf93..534b23d9586 100644
--- a/arch/arm/common/locomo.c
+++ b/arch/arm/common/locomo.c
@@ -24,9 +24,9 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/io.h>
#include <mach/hardware.h>
-#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c
index ec8a5471bf0..fb86f248aab 100644
--- a/arch/arm/common/sa1111.c
+++ b/arch/arm/common/sa1111.c
@@ -25,10 +25,10 @@
#include <linux/spinlock.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
+#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
-#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/sizes.h>
diff --git a/arch/arm/common/scoop.c b/arch/arm/common/scoop.c
index ae39553589d..697c6491399 100644
--- a/arch/arm/common/scoop.c
+++ b/arch/arm/common/scoop.c
@@ -15,7 +15,7 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
-#include <asm/io.h>
+#include <linux/io.h>
#include <asm/gpio.h>
#include <asm/hardware/scoop.h>
diff --git a/arch/arm/common/time-acorn.c b/arch/arm/common/time-acorn.c
index df0983aafe6..deeed561b16 100644
--- a/arch/arm/common/time-acorn.c
+++ b/arch/arm/common/time-acorn.c
@@ -17,9 +17,9 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/io.h>
#include <mach/hardware.h>
-#include <asm/io.h>
#include <asm/hardware/ioc.h>
#include <asm/mach/time.h>
diff --git a/arch/arm/common/uengine.c b/arch/arm/common/uengine.c
index 7ecd3c0ab01..b520e56216a 100644
--- a/arch/arm/common/uengine.c
+++ b/arch/arm/common/uengine.c
@@ -16,9 +16,9 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/string.h>
+#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/hardware/uengine.h>
-#include <asm/io.h>
#if defined(CONFIG_ARCH_IXP2000)
#define IXP_UENGINE_CSR_VIRT_BASE IXP2000_UENGINE_CSR_VIRT_BASE
diff --git a/arch/arm/common/via82c505.c b/arch/arm/common/via82c505.c
index 79a8206e62a..8421d39109b 100644
--- a/arch/arm/common/via82c505.c
+++ b/arch/arm/common/via82c505.c
@@ -4,8 +4,8 @@
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/ioport.h>
+#include <linux/io.h>
-#include <asm/io.h>
#include <asm/system.h>
#include <asm/mach/pci.h>
diff --git a/arch/arm/common/vic.c b/arch/arm/common/vic.c
index c026fa2214a..f1e4b8f60ca 100644
--- a/arch/arm/common/vic.c
+++ b/arch/arm/common/vic.c
@@ -20,8 +20,8 @@
*/
#include <linux/init.h>
#include <linux/list.h>
+#include <linux/io.h>
-#include <asm/io.h>
#include <asm/mach/irq.h>
#include <asm/hardware/vic.h>