diff options
Diffstat (limited to 'include/linux/ssb')
| -rw-r--r-- | include/linux/ssb/ssb.h | 144 |
1 files changed, 140 insertions, 4 deletions
diff --git a/include/linux/ssb/ssb.h b/include/linux/ssb/ssb.h index 50dfd0dc409..4bf8cade9db 100644 --- a/include/linux/ssb/ssb.h +++ b/include/linux/ssb/ssb.h @@ -7,6 +7,7 @@ #include <linux/spinlock.h> #include <linux/pci.h> #include <linux/mod_devicetable.h> +#include <linux/dma-mapping.h> #include <linux/ssb/ssb_regs.h> @@ -137,9 +138,6 @@ struct ssb_device { const struct ssb_bus_ops *ops; struct device *dev; - /* Pointer to the device that has to be used for - * any DMA related operation. */ - struct device *dma_dev; struct ssb_bus *bus; struct ssb_device_id id; @@ -399,13 +397,151 @@ static inline void ssb_block_write(struct ssb_device *dev, const void *buffer, #endif /* CONFIG_SSB_BLOCKIO */ +/* The SSB DMA API. Use this API for any DMA operation on the device. + * This API basically is a wrapper that calls the correct DMA API for + * the host device type the SSB device is attached to. */ + /* Translation (routing) bits that need to be ORed to DMA * addresses before they are given to a device. */ extern u32 ssb_dma_translation(struct ssb_device *dev); #define SSB_DMA_TRANSLATION_MASK 0xC0000000 #define SSB_DMA_TRANSLATION_SHIFT 30 -extern int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask); +extern int ssb_dma_set_mask(struct ssb_device *dev, u64 mask); + +extern void * ssb_dma_alloc_consistent(struct ssb_device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp_flags); +extern void ssb_dma_free_consistent(struct ssb_device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle, + gfp_t gfp_flags); + +static inline void __cold __ssb_dma_not_implemented(struct ssb_device *dev) +{ +#ifdef CONFIG_SSB_DEBUG + printk(KERN_ERR "SSB: BUG! Calling DMA API for " + "unsupported bustype %d\n", dev->bus->bustype); +#endif /* DEBUG */ +} + +static inline int ssb_dma_mapping_error(struct ssb_device *dev, dma_addr_t addr) +{ + switch (dev->bus->bustype) { + case SSB_BUSTYPE_PCI: + return pci_dma_mapping_error(addr); + case SSB_BUSTYPE_SSB: + return dma_mapping_error(addr); + default: + __ssb_dma_not_implemented(dev); + } + return -ENOSYS; +} + +static inline dma_addr_t ssb_dma_map_single(struct ssb_device *dev, void *p, + size_t size, enum dma_data_direction dir) +{ + switch (dev->bus->bustype) { + case SSB_BUSTYPE_PCI: + return pci_map_single(dev->bus->host_pci, p, size, dir); + case SSB_BUSTYPE_SSB: + return dma_map_single(dev->dev, p, size, dir); + default: + __ssb_dma_not_implemented(dev); + } + return 0; +} + +static inline void ssb_dma_unmap_single(struct ssb_device *dev, dma_addr_t dma_addr, + size_t size, enum dma_data_direction dir) +{ + switch (dev->bus->bustype) { + case SSB_BUSTYPE_PCI: + pci_unmap_single(dev->bus->host_pci, dma_addr, size, dir); + return; + case SSB_BUSTYPE_SSB: + dma_unmap_single(dev->dev, dma_addr, size, dir); + return; + default: + __ssb_dma_not_implemented(dev); + } +} + +static inline void ssb_dma_sync_single_for_cpu(struct ssb_device *dev, + dma_addr_t dma_addr, + size_t size, + enum dma_data_direction dir) +{ + switch (dev->bus->bustype) { + case SSB_BUSTYPE_PCI: + pci_dma_sync_single_for_cpu(dev->bus->host_pci, dma_addr, + size, dir); + return; + case SSB_BUSTYPE_SSB: + dma_sync_single_for_cpu(dev->dev, dma_addr, size, dir); + return; + default: + __ssb_dma_not_implemented(dev); + } +} + +static inline void ssb_dma_sync_single_for_device(struct ssb_device *dev, + dma_addr_t dma_addr, + size_t size, + enum dma_data_direction dir) +{ + switch (dev->bus->bustype) { + case SSB_BUSTYPE_PCI: + pci_dma_sync_single_for_device(dev->bus->host_pci, dma_addr, + size, dir); + return; + case SSB_BUSTYPE_SSB: + dma_sync_single_for_device(dev->dev, dma_addr, size, dir); + return; + default: + __ssb_dma_not_implemented(dev); + } +} + +static inline void ssb_dma_sync_single_range_for_cpu(struct ssb_device *dev, + dma_addr_t dma_addr, + unsigned long offset, + size_t size, + enum dma_data_direction dir) +{ + switch (dev->bus->bustype) { + case SSB_BUSTYPE_PCI: + /* Just sync everything. That's all the PCI API can do. */ + pci_dma_sync_single_for_cpu(dev->bus->host_pci, dma_addr, + offset + size, dir); + return; + case SSB_BUSTYPE_SSB: + dma_sync_single_range_for_cpu(dev->dev, dma_addr, offset, + size, dir); + return; + default: + __ssb_dma_not_implemented(dev); + } +} + +static inline void ssb_dma_sync_single_range_for_device(struct ssb_device *dev, + dma_addr_t dma_addr, + unsigned long offset, + size_t size, + enum dma_data_direction dir) +{ + switch (dev->bus->bustype) { + case SSB_BUSTYPE_PCI: + /* Just sync everything. That's all the PCI API can do. */ + pci_dma_sync_single_for_device(dev->bus->host_pci, dma_addr, + offset + size, dir); + return; + case SSB_BUSTYPE_SSB: + dma_sync_single_range_for_device(dev->dev, dma_addr, offset, + size, dir); + return; + default: + __ssb_dma_not_implemented(dev); + } +} #ifdef CONFIG_SSB_PCIHOST |