--- /dev/null
+/*
+ * 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
+ * @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 */
+ 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 */
Code Review / kvmfornfv.git / blobdiff