diff options
Diffstat (limited to 'include/linux/swiotlb.h')
| -rw-r--r-- | include/linux/swiotlb.h | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 57be2a0a9fbf..66867d2188ba 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -80,6 +80,9 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys, * @area_nslabs: Number of slots in each area. * @areas: Array of memory area descriptors. * @slots: Array of slot descriptors. + * @node: Member of the IO TLB memory pool list. + * @rcu: RCU head for swiotlb_dyn_free(). + * @transient: %true if transient memory pool. */ struct io_tlb_pool { phys_addr_t start; @@ -91,6 +94,11 @@ struct io_tlb_pool { unsigned int area_nslabs; struct io_tlb_area *areas; struct io_tlb_slot *slots; +#ifdef CONFIG_SWIOTLB_DYNAMIC + struct list_head node; + struct rcu_head rcu; + bool transient; +#endif }; /** @@ -122,6 +130,20 @@ struct io_tlb_mem { #endif }; +#ifdef CONFIG_SWIOTLB_DYNAMIC + +struct io_tlb_pool *swiotlb_find_pool(struct device *dev, phys_addr_t paddr); + +#else + +static inline struct io_tlb_pool *swiotlb_find_pool(struct device *dev, + phys_addr_t paddr) +{ + return &dev->dma_io_tlb_mem->defpool; +} + +#endif + /** * is_swiotlb_buffer() - check if a physical address belongs to a swiotlb * @dev: Device which has mapped the buffer. @@ -137,7 +159,12 @@ static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr) { struct io_tlb_mem *mem = dev->dma_io_tlb_mem; - return mem && paddr >= mem->defpool.start && paddr < mem->defpool.end; + if (!mem) + return false; + + if (IS_ENABLED(CONFIG_SWIOTLB_DYNAMIC)) + return swiotlb_find_pool(dev, paddr); + return paddr >= mem->defpool.start && paddr < mem->defpool.end; } static inline bool is_swiotlb_force_bounce(struct device *dev) |