/** * struct iop_adma_device - internal representation of an ADMA device * @pdev: Platform device * @id: HW ADMA Device selector * @dma_desc_pool: base of DMA descriptor region (DMA address) * @dma_desc_pool_virt: base of DMA descriptor region (CPU address) * @common: embedded struct dma_device
*/ struct iop_adma_device { struct platform_device *pdev; int id;
dma_addr_t dma_desc_pool; void *dma_desc_pool_virt; struct dma_device common;
};
/** * struct iop_adma_chan - internal representation of an ADMA device * @pending: allows batching of hardware operations * @lock: serializes enqueue/dequeue operations to the slot pool * @mmr_base: memory mapped register base * @chain: device chain view of the descriptors * @device: parent device * @common: common dmaengine channel object members * @last_used: place holder for allocation to continue from where it left off * @all_slots: complete domain of slots usable by the channel * @slots_allocated: records the actual size of the descriptor slot pool * @irq_tasklet: bottom half where iop_adma_slot_cleanup runs
*/ struct iop_adma_chan { int pending;
spinlock_t lock; /* protects the descriptor slot pool */ void __iomem *mmr_base; struct list_head chain; struct iop_adma_device *device; struct dma_chan common; struct iop_adma_desc_slot *last_used; struct list_head all_slots; int slots_allocated; struct tasklet_struct irq_tasklet;
};
/** * struct iop_adma_desc_slot - IOP-ADMA software descriptor * @slot_node: node on the iop_adma_chan.all_slots list * @chain_node: node on the op_adma_chan.chain list * @hw_desc: virtual address of the hardware descriptor chain * @phys: hardware address of the hardware descriptor chain * @group_head: first operation in a transaction * @slot_cnt: total slots used in an transaction (group of operations) * @slots_per_op: number of slots per operation * @idx: pool index * @tx_list: list of descriptors that are associated with one operation * @async_tx: support for the async_tx api * @group_list: list of slots that make up a multi-descriptor transaction * for example transfer lengths larger than the supported hw max * @xor_check_result: result of zero sum * @crc32_result: result crc calculation
*/ struct iop_adma_desc_slot { struct list_head slot_node; struct list_head chain_node; void *hw_desc; struct iop_adma_desc_slot *group_head;
u16 slot_cnt;
u16 slots_per_op;
u16 idx; struct list_head tx_list; struct dma_async_tx_descriptor async_tx; union {
u32 *xor_check_result;
u32 *crc32_result;
u32 *pq_check_result;
};
};
struct iop_adma_platform_data { int hw_id;
dma_cap_mask_t cap_mask;
size_t pool_size;
};
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