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;
dma_addr_t dma_addr;
int needs_bounce = 0;
if (device_info)
DO_STATS ( device_info->map_op_count++ );
dma_addr = virt_to_dma(dev, ptr);
if (dev->dma_mask) {
unsigned long mask = *dev->dma_mask;
unsigned long limit;
limit = (mask + 1) & ~mask;
if (limit && size > limit) {
dev_err(dev, "DMA mapping too big (requested %#x "
"mask %#Lx)\n", size, *dev->dma_mask);
return ~0;
}
needs_bounce = (dma_addr | (dma_addr + size - 1)) & ~mask;
}
if (device_info && (needs_bounce || dma_needs_bounce(dev, dma_addr, size))) {
struct safe_buffer *buf;
buf = alloc_safe_buffer(device_info, ptr, size, dir);
if (buf == 0) {
dev_err(dev, "%s: unable to map unsafe buffer %p!\n",
__func__, ptr);
return 0;
}
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);
if ((dir == DMA_TO_DEVICE) ||
(dir == DMA_BIDIRECTIONAL)) {
dev_dbg(dev, "%s: copy unsafe %p to safe %p, size %d\n",
__func__, ptr, buf->safe, size);
memcpy(buf->safe, ptr, size);
}
ptr = buf->safe;
dma_addr = buf->safe_dma_addr;
} else {
dma_cache_maint(ptr, size, dir);
}
return dma_addr;
}
static inline dma_addr_t map_single_or_page(struct device *dev, void *ptr,
struct page *page, unsigned long offset, size_t size,
enum dma_data_direction dir)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
dma_addr_t dma_addr;
int needs_bounce = 0;
if (device_info)
DO_STATS ( device_info->map_op_count++ );
if (page)
dma_addr = page_to_dma(dev, page) + offset;
else
dma_addr = virt_to_dma(dev, ptr);
if (dev->dma_mask) {
unsigned long mask = *dev->dma_mask;
unsigned long limit;
limit = (mask - 1) | mask;
limit = (limit + 1) & ~limit;
if (limit && size > limit) {
dev_err(dev, "DMA mapping too big (requested %#x "
"mask %#Lx)\n", size, *dev->dma_mask);
return ~0;
}
/*
* Figure out if we need to bounce from the DMA mask.
*/
needs_bounce = (dma_addr & ~mask) ||
(limit && (dma_addr + size > limit));
}
if (device_info && (needs_bounce || dma_needs_bounce(dev, dma_addr, size))) {
struct safe_buffer *buf;
buf = alloc_safe_buffer(device_info, ptr, page, offset, size, dir);
if (buf == 0) {
dev_err(dev, "%s: unable to map unsafe buffer %p!\n",
__func__, ptr);
return 0;
}
if (buf->page)
dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped "
"to %p (dma=%#x)\n", __func__,
page_address(buf->page),
page_to_dma(dev, buf->page),
buf->safe, buf->safe_dma_addr);
else
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);
if ((dir == DMA_TO_DEVICE) ||
(dir == DMA_BIDIRECTIONAL)) {
if (page)
ptr = kmap_atomic(page, KM_BOUNCE_READ) + offset;
dev_dbg(dev, "%s: copy unsafe %p to safe %p, size %d\n",
__func__, ptr, buf->safe, size);
memcpy(buf->safe, ptr, size);
wmb();
if (page)
kunmap_atomic(ptr - offset, KM_BOUNCE_READ);
}
dma_addr = buf->safe_dma_addr;
} else {
/*
* We don't need to sync the DMA buffer since
* it was allocated via the coherent allocators.
*/
if (page)
__dma_page_cpu_to_dev(page, offset, size, dir);
else
__dma_single_cpu_to_dev(ptr, size, dir);
}
return 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;
dma_addr_t dma_addr;
int needs_bounce = 0;
if (device_info)
DO_STATS ( device_info->map_op_count++ );
dma_addr = virt_to_dma(dev, ptr);
if (dev->dma_mask) {
unsigned long mask = *dev->dma_mask;
unsigned long limit;
limit = (mask + 1) & ~mask;
if (limit && size > limit) {
dev_err(dev, "DMA mapping too big (requested %#x "
"mask %#Lx)\n", size, *dev->dma_mask);
return ~0;
}
/*
* Figure out if we need to bounce from the DMA mask.
*/
needs_bounce = (dma_addr | (dma_addr + size - 1)) & ~mask;
}
if (device_info && (needs_bounce || dma_needs_bounce(dev, dma_addr, size))) {
struct safe_buffer *buf;
buf = alloc_safe_buffer(device_info, ptr, size, dir);
if (buf == 0) {
dev_err(dev, "%s: unable to map unsafe buffer %p!\n",
__func__, ptr);
return 0;
}
dev_dbg(dev,
"%s: unsafe buffer %p (phy=%p) mapped to %p (phy=%p)\n",
__func__, buf->ptr, (void *) virt_to_dma(dev, buf->ptr),
buf->safe, (void *) buf->safe_dma_addr);
if ((dir == DMA_TO_DEVICE) ||
(dir == DMA_BIDIRECTIONAL)) {
dev_dbg(dev, "%s: copy unsafe %p to safe %p, size %d\n",
__func__, ptr, buf->safe, size);
memcpy(buf->safe, ptr, size);
}
ptr = buf->safe;
dma_addr = buf->safe_dma_addr;
} else {
/*
* We don't need to sync the DMA buffer since
* it was allocated via the coherent allocators.
*/
consistent_sync(ptr, size, dir);
}
return dma_addr;
}
