#define PPC440SPE_ADMA_DMA_MAX_BYTE_COUNT 0xFFFFFFUL /* this is the XOR_CBBCR width */ #define PPC440SPE_ADMA_XOR_MAX_BYTE_COUNT (1 << 31) #define PPC440SPE_ADMA_ZERO_SUM_MAX_BYTE_COUNT PPC440SPE_ADMA_XOR_MAX_BYTE_COUNT
#define PPC440SPE_RXOR_RUN 0
#define MQ0_CF2H_RXOR_BS_MASK 0x1FF
#undef ADMA_LL_DEBUG
/** * struct ppc440spe_adma_device - internal representation of an ADMA device * @dev: device * @dma_reg: base for DMAx register access * @xor_reg: base for XOR register access * @i2o_reg: base for I2O register access * @id: HW ADMA Device selector * @dma_desc_pool_virt: base of DMA descriptor region (CPU address) * @dma_desc_pool: base of DMA descriptor region (DMA address) * @pool_size: size of the pool * @irq: DMAx or XOR irq number * @err_irq: DMAx error irq number * @common: embedded struct dma_device
*/ struct ppc440spe_adma_device { struct device *dev; struct dma_regs __iomem *dma_reg; struct xor_regs __iomem *xor_reg; struct i2o_regs __iomem *i2o_reg; int id; void *dma_desc_pool_virt;
dma_addr_t dma_desc_pool;
size_t pool_size; int irq; int err_irq; struct dma_device common;
};
/** * struct ppc440spe_adma_chan - internal representation of an ADMA channel * @lock: serializes enqueue/dequeue operations to the slot pool * @device: parent device * @chain: device chain view of the descriptors * @common: common dmaengine channel object members * @all_slots: complete domain of slots usable by the channel * @pending: allows batching of hardware operations * @slots_allocated: records the actual size of the descriptor slot pool * @hw_chain_inited: h/w descriptor chain initialization flag * @irq_tasklet: bottom half where ppc440spe_adma_slot_cleanup runs * @needs_unmap: if buffers should not be unmapped upon final processing * @pdest_page: P destination page for async validate operation * @qdest_page: Q destination page for async validate operation * @pdest: P dma addr for async validate operation * @qdest: Q dma addr for async validate operation
*/ struct ppc440spe_adma_chan {
spinlock_t lock; struct ppc440spe_adma_device *device; struct list_head chain; struct dma_chan common; struct list_head all_slots; struct ppc440spe_adma_desc_slot *last_used; int pending; int slots_allocated; int hw_chain_inited; struct tasklet_struct irq_tasklet;
u8 needs_unmap; struct page *pdest_page; struct page *qdest_page;
dma_addr_t pdest;
dma_addr_t qdest;
};
struct ppc440spe_rxor {
u32 addrl;
u32 addrh; int len; int xor_count; int addr_count; int desc_count; int state;
};
/** * struct ppc440spe_adma_desc_slot - PPC440SPE-ADMA software descriptor * @phys: hardware address of the hardware descriptor chain * @group_head: first operation in a transaction * @hw_next: pointer to the next descriptor in chain * @async_tx: support for the async_tx api * @slot_node: node on the iop_adma_chan.all_slots list * @chain_node: node on the op_adma_chan.chain list * @group_list: list of slots that make up a multi-descriptor transaction * for example transfer lengths larger than the supported hw max * @unmap_len: transaction bytecount * @hw_desc: virtual address of the hardware descriptor chain * @stride: currently chained or not * @idx: pool index * @slot_cnt: total slots used in an transaction (group of operations) * @src_cnt: number of sources set in this descriptor * @dst_cnt: number of destinations set in the descriptor * @slots_per_op: number of slots per operation * @descs_per_op: number of slot per P/Q operation see comment * for ppc440spe_prep_dma_pqxor function * @flags: desc state/type * @reverse_flags: 1 if a corresponding rxor address uses reversed address order * @xor_check_result: result of zero sum * @crc32_result: result crc calculation
*/ struct ppc440spe_adma_desc_slot {
dma_addr_t phys; struct ppc440spe_adma_desc_slot *group_head; struct ppc440spe_adma_desc_slot *hw_next; struct dma_async_tx_descriptor async_tx; struct list_head slot_node; struct list_head chain_node; /* node in channel ops list */ struct list_head group_list; /* list */ unsignedint unmap_len; void *hw_desc;
u16 stride;
u16 idx;
u16 slot_cnt;
u8 src_cnt;
u8 dst_cnt;
u8 slots_per_op;
u8 descs_per_op; unsignedlong flags; unsignedlong reverse_flags[8];
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