mirror of https://gitee.com/openkylin/linux.git
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
#ifndef _PARISC_DMA_MAPPING_H
|
|
#define _PARISC_DMA_MAPPING_H
|
|
|
|
#include <asm/cacheflush.h>
|
|
|
|
/*
|
|
** We need to support 4 different coherent dma models with one binary:
|
|
**
|
|
** I/O MMU consistent method dma_sync behavior
|
|
** ============= ====================== =======================
|
|
** a) PA-7x00LC uncachable host memory flush/purge
|
|
** b) U2/Uturn cachable host memory NOP
|
|
** c) Ike/Astro cachable host memory NOP
|
|
** d) EPIC/SAGA memory on EPIC/SAGA flush/reset DMA channel
|
|
**
|
|
** PA-7[13]00LC processors have a GSC bus interface and no I/O MMU.
|
|
**
|
|
** Systems (eg PCX-T workstations) that don't fall into the above
|
|
** categories will need to modify the needed drivers to perform
|
|
** flush/purge and allocate "regular" cacheable pages for everything.
|
|
*/
|
|
|
|
#ifdef CONFIG_PA11
|
|
extern const struct dma_map_ops pcxl_dma_ops;
|
|
extern const struct dma_map_ops pcx_dma_ops;
|
|
#endif
|
|
|
|
extern const struct dma_map_ops *hppa_dma_ops;
|
|
|
|
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
|
|
{
|
|
return hppa_dma_ops;
|
|
}
|
|
|
|
static inline void
|
|
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
if (hppa_dma_ops->sync_single_for_cpu)
|
|
flush_kernel_dcache_range((unsigned long)vaddr, size);
|
|
}
|
|
|
|
static inline void *
|
|
parisc_walk_tree(struct device *dev)
|
|
{
|
|
struct device *otherdev;
|
|
if(likely(dev->platform_data != NULL))
|
|
return dev->platform_data;
|
|
/* OK, just traverse the bus to find it */
|
|
for(otherdev = dev->parent; otherdev;
|
|
otherdev = otherdev->parent) {
|
|
if(otherdev->platform_data) {
|
|
dev->platform_data = otherdev->platform_data;
|
|
break;
|
|
}
|
|
}
|
|
BUG_ON(!dev->platform_data);
|
|
return dev->platform_data;
|
|
}
|
|
|
|
#define GET_IOC(dev) (HBA_DATA(parisc_walk_tree(dev))->iommu)
|
|
|
|
|
|
#ifdef CONFIG_IOMMU_CCIO
|
|
struct parisc_device;
|
|
struct ioc;
|
|
void * ccio_get_iommu(const struct parisc_device *dev);
|
|
int ccio_request_resource(const struct parisc_device *dev,
|
|
struct resource *res);
|
|
int ccio_allocate_resource(const struct parisc_device *dev,
|
|
struct resource *res, unsigned long size,
|
|
unsigned long min, unsigned long max, unsigned long align);
|
|
#else /* !CONFIG_IOMMU_CCIO */
|
|
#define ccio_get_iommu(dev) NULL
|
|
#define ccio_request_resource(dev, res) insert_resource(&iomem_resource, res)
|
|
#define ccio_allocate_resource(dev, res, size, min, max, align) \
|
|
allocate_resource(&iomem_resource, res, size, min, max, \
|
|
align, NULL, NULL)
|
|
#endif /* !CONFIG_IOMMU_CCIO */
|
|
|
|
#ifdef CONFIG_IOMMU_SBA
|
|
struct parisc_device;
|
|
void * sba_get_iommu(struct parisc_device *dev);
|
|
#endif
|
|
|
|
#endif
|