| /* |
| * 2006-2009 (C) DENX Software Engineering. |
| * |
| * Author: Yuri Tikhonov <yur@emcraft.com> |
| * |
| * This file is licensed under the terms of the GNU General Public License |
| * version 2. This program is licensed "as is" without any warranty of |
| * any kind, whether express or implied. |
| */ |
| |
| #ifndef _PPC440SPE_ADMA_H |
| #define _PPC440SPE_ADMA_H |
| |
| #include <linux/types.h> |
| #include "dma.h" |
| #include "xor.h" |
| |
| #define to_ppc440spe_adma_chan(chan) \ |
| container_of(chan, struct ppc440spe_adma_chan, common) |
| #define to_ppc440spe_adma_device(dev) \ |
| container_of(dev, struct ppc440spe_adma_device, common) |
| #define tx_to_ppc440spe_adma_slot(tx) \ |
| container_of(tx, struct ppc440spe_adma_desc_slot, async_tx) |
| |
| /* Default polynomial (for 440SP is only available) */ |
| #define PPC440SPE_DEFAULT_POLY 0x4d |
| |
| #define PPC440SPE_ADMA_ENGINES_NUM (XOR_ENGINES_NUM + DMA_ENGINES_NUM) |
| |
| #define PPC440SPE_ADMA_WATCHDOG_MSEC 3 |
| #define PPC440SPE_ADMA_THRESHOLD 1 |
| |
| #define PPC440SPE_DMA0_ID 0 |
| #define PPC440SPE_DMA1_ID 1 |
| #define PPC440SPE_XOR_ID 2 |
| |
| #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 |
| * @completed_cookie: identifier for the most recently completed operation |
| * @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; |
| dma_cookie_t completed_cookie; |
| 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 */ |
| unsigned int 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; |
| unsigned long flags; |
| unsigned long reverse_flags[8]; |
| |
| #define PPC440SPE_DESC_INT 0 /* generate interrupt on complete */ |
| #define PPC440SPE_ZERO_P 1 /* clear P destionaion */ |
| #define PPC440SPE_ZERO_Q 2 /* clear Q destination */ |
| #define PPC440SPE_COHERENT 3 /* src/dst are coherent */ |
| |
| #define PPC440SPE_DESC_WXOR 4 /* WXORs are in chain */ |
| #define PPC440SPE_DESC_RXOR 5 /* RXOR is in chain */ |
| |
| #define PPC440SPE_DESC_RXOR123 8 /* CDB for RXOR123 operation */ |
| #define PPC440SPE_DESC_RXOR124 9 /* CDB for RXOR124 operation */ |
| #define PPC440SPE_DESC_RXOR125 10 /* CDB for RXOR125 operation */ |
| #define PPC440SPE_DESC_RXOR12 11 /* CDB for RXOR12 operation */ |
| #define PPC440SPE_DESC_RXOR_REV 12 /* CDB has srcs in reversed order */ |
| |
| #define PPC440SPE_DESC_PCHECK 13 |
| #define PPC440SPE_DESC_QCHECK 14 |
| |
| #define PPC440SPE_DESC_RXOR_MSK 0x3 |
| |
| struct ppc440spe_rxor rxor_cursor; |
| |
| union { |
| u32 *xor_check_result; |
| u32 *crc32_result; |
| }; |
| }; |
| |
| #endif /* _PPC440SPE_ADMA_H */ |