kvmfornfv -

Age	Commit message (Expand)	Author	Files	Lines
2015-08-04	Add the rt linux 4.1.3-rt3 as base	Yunhong Jiang	1	-0/+793

/* * Copyright (C) 2007, 2008, Marvell International Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. */ #ifndef MV_XOR_H #define MV_XOR_H #include <linux/types.h> #include <linux/io.h> #include <linux/dmaengine.h> #include <linux/interrupt.h> #define MV_XOR_POOL_SIZE (MV_XOR_SLOT_SIZE * 3072) #define MV_XOR_SLOT_SIZE 64 #define MV_XOR_THRESHOLD 1 #define MV_XOR_MAX_CHANNELS 2 #define MV_XOR_MIN_BYTE_COUNT SZ_128 #define MV_XOR_MAX_BYTE_COUNT (SZ_16M - 1) /* Values for the XOR_CONFIG register */ #define XOR_OPERATION_MODE_XOR 0 #define XOR_OPERATION_MODE_MEMCPY 2 #define XOR_OPERATION_MODE_IN_DESC 7 #define XOR_DESCRIPTOR_SWAP BIT(14) #define XOR_DESC_SUCCESS 0x40000000 #define XOR_DESC_OPERATION_XOR (0 << 24) #define XOR_DESC_OPERATION_CRC32C (1 << 24) #define XOR_DESC_OPERATION_MEMCPY (2 << 24) #define XOR_DESC_DMA_OWNED BIT(31) #define XOR_DESC_EOD_INT_EN BIT(31) #define XOR_CURR_DESC(chan) (chan->mmr_high_base + 0x10 + (chan->idx * 4)) #define XOR_NEXT_DESC(chan) (chan->mmr_high_base + 0x00 + (chan->idx * 4)) #define XOR_BYTE_COUNT(chan) (chan->mmr_high_base + 0x20 + (chan->idx * 4)) #define XOR_DEST_POINTER(chan) (chan->mmr_high_base + 0xB0 + (chan->idx * 4)) #define XOR_BLOCK_SIZE(chan) (chan->mmr_high_base + 0xC0 + (chan->idx * 4)) #define XOR_INIT_VALUE_LOW(chan) (chan->mmr_high_base + 0xE0) #define XOR_INIT_VALUE_HIGH(chan) (chan->mmr_high_base + 0xE4) #define XOR_CONFIG(chan) (chan->mmr_base + 0x10 + (chan->idx * 4)) #define XOR_ACTIVATION(chan) (chan->mmr_base + 0x20 + (chan->idx * 4)) #define XOR_INTR_CAUSE(chan) (chan->mmr_base + 0x30) #define XOR_INTR_MASK(chan) (chan->mmr_base + 0x40) #define XOR_ERROR_CAUSE(chan) (chan->mmr_base + 0x50) #define XOR_ERROR_ADDR(chan) (chan->mmr_base + 0x60) #define XOR_INT_END_OF_DESC BIT(0) #define XOR_INT_END_OF_CHAIN BIT(1) #define XOR_INT_STOPPED BIT(2) #define XOR_INT_PAUSED BIT(3) #define XOR_INT_ERR_DECODE BIT(4) #define XOR_INT_ERR_RDPROT BIT(5) #define XOR_INT_ERR_WRPROT BIT(6) #define XOR_INT_ERR_OWN BIT(7) #define XOR_INT_ERR_PAR BIT(8) #define XOR_INT_ERR_MBUS BIT(9) #define XOR_INTR_ERRORS (XOR_INT_ERR_DECODE | XOR_INT_ERR_RDPROT | \ XOR_INT_ERR_WRPROT | XOR_INT_ERR_OWN | \ XOR_INT_ERR_PAR | XOR_INT_ERR_MBUS) #define XOR_INTR_MASK_VALUE (XOR_INT_END_OF_DESC | XOR_INT_END_OF_CHAIN | \ XOR_INT_STOPPED | XOR_INTR_ERRORS) #define WINDOW_BASE(w) (0x50 + ((w) << 2)) #define WINDOW_SIZE(w) (0x70 + ((w) << 2)) #define WINDOW_REMAP_HIGH(w) (0x90 + ((w) << 2)) #define WINDOW_BAR_ENABLE(chan) (0x40 + ((chan) << 2)) #define WINDOW_OVERRIDE_CTRL(chan) (0xA0 + ((chan) << 2)) struct mv_xor_device { void __iomem *xor_base; void __iomem *xor_high_base; struct clk *clk; struct mv_xor_chan *channels[MV_XOR_MAX_CHANNELS]; }; /** * struct mv_xor_chan - internal representation of a XOR channel * @pending: allows batching of hardware operations * @lock: serializes enqueue/dequeue operations to the descriptors pool * @mmr_base: memory mapped register base * @idx: the index of the xor channel * @chain: device chain view of the descriptors * @free_slots: free slots usable by the channel * @allocated_slots: slots allocated by the driver * @completed_slots: slots completed by HW but still need to be acked * @device: parent device * @common: common dmaengine channel object members * @slots_allocated: records the actual size of the descriptor slot pool * @irq_tasklet: bottom half where mv_xor_slot_cleanup runs * @op_in_desc: new mode of driver, each op is writen to descriptor. */ struct mv_xor_chan { int pending; spinlock_t lock; /* protects the descriptor slot pool */ void __iomem *mmr_base; void __iomem *mmr_high_base; unsigned int idx; int irq; enum dma_transaction_type current_type; struct list_head chain; struct list_head free_slots; struct list_head allocated_slots; struct list_head completed_slots; dma_addr_t dma_desc_pool; void *dma_desc_pool_virt; size_t pool_size; struct dma_device dmadev; struct dma_chan dmachan; int slots_allocated; struct tasklet_struct irq_tasklet; int op_in_desc; char dummy_src[MV_XOR_MIN_BYTE_COUNT]; char dummy_dst[MV_XOR_MIN_BYTE_COUNT]; dma_addr_t dummy_src_addr, dummy_dst_addr; }; /** * struct mv_xor_desc_slot - software descriptor * @node: node on the mv_xor_chan lists * @hw_desc: virtual address of the hardware descriptor chain * @phys: hardware address of the hardware descriptor chain * @slot_used: slot in use or not * @idx: pool index * @tx_list: list of slots that make up a multi-descriptor transaction * @async_tx: support for the async_tx api */ struct mv_xor_desc_slot { struct list_head node; enum dma_transaction_type type; void *hw_desc; u16 idx; struct dma_async_tx_descriptor async_tx; }; /* * This structure describes XOR descriptor size 64bytes. The * mv_phy_src_idx() macro must be used when indexing the values of the * phy_src_addr[] array. This is due to the fact that the 'descriptor * swap' feature, used on big endian systems, swaps descriptors data * within blocks of 8 bytes. So two consecutive values of the * phy_src_addr[] array are actually swapped in big-endian, which * explains the different mv_phy_src_idx() implementation. */ #if defined(__LITTLE_ENDIAN) struct mv_xor_desc { u32 status; /* descriptor execution status */ u32 crc32_result; /* result of CRC-32 calculation */ u32 desc_command; /* type of operation to be carried out */ u32 phy_next_desc; /* next descriptor address pointer */ u32 byte_count; /* size of src/dst blocks in bytes */ u32 phy_dest_addr; /* destination block address */ u32 phy_src_addr[8]; /* source block addresses */ u32 reserved0; u32 reserved1; }; #define mv_phy_src_idx(src_idx) (src_idx) #else struct mv_xor_desc { u32 crc32_result; /* result of CRC-32 calculation */ u32 status; /* descriptor execution status */ u32 phy_next_desc; /* next descriptor address pointer */ u32 desc_command; /* type of operation to be carried out */ u32 phy_dest_addr; /* destination block address */ u32 byte_count; /* size of src/dst blocks in bytes */ u32 phy_src_addr[8]; /* source block addresses */ u32 reserved1; u32 reserved0; }; #define mv_phy_src_idx(src_idx) (src_idx ^ 1) #endif #define to_mv_sw_desc(addr_hw_desc) \ container_of(addr_hw_desc, struct mv_xor_desc_slot, hw_desc) #define mv_hw_desc_slot_idx(hw_desc, idx) \ ((void *)(((unsigned long)hw_desc) + ((idx) << 5))) #endif