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196 lines
5.5 KiB
196 lines
5.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_S390_PCI_DMA_H |
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#define _ASM_S390_PCI_DMA_H |
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/* I/O Translation Anchor (IOTA) */ |
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enum zpci_ioat_dtype { |
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ZPCI_IOTA_STO = 0, |
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ZPCI_IOTA_RTTO = 1, |
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ZPCI_IOTA_RSTO = 2, |
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ZPCI_IOTA_RFTO = 3, |
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ZPCI_IOTA_PFAA = 4, |
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ZPCI_IOTA_IOPFAA = 5, |
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ZPCI_IOTA_IOPTO = 7 |
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}; |
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#define ZPCI_IOTA_IOT_ENABLED 0x800UL |
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#define ZPCI_IOTA_DT_ST (ZPCI_IOTA_STO << 2) |
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#define ZPCI_IOTA_DT_RT (ZPCI_IOTA_RTTO << 2) |
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#define ZPCI_IOTA_DT_RS (ZPCI_IOTA_RSTO << 2) |
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#define ZPCI_IOTA_DT_RF (ZPCI_IOTA_RFTO << 2) |
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#define ZPCI_IOTA_DT_PF (ZPCI_IOTA_PFAA << 2) |
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#define ZPCI_IOTA_FS_4K 0 |
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#define ZPCI_IOTA_FS_1M 1 |
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#define ZPCI_IOTA_FS_2G 2 |
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#define ZPCI_KEY (PAGE_DEFAULT_KEY << 5) |
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#define ZPCI_TABLE_SIZE_RT (1UL << 42) |
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#define ZPCI_IOTA_STO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_ST) |
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#define ZPCI_IOTA_RTTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RT) |
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#define ZPCI_IOTA_RSTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RS) |
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#define ZPCI_IOTA_RFTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RF) |
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#define ZPCI_IOTA_RFAA_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_PF | ZPCI_IOTA_FS_2G) |
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/* I/O Region and segment tables */ |
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#define ZPCI_INDEX_MASK 0x7ffUL |
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#define ZPCI_TABLE_TYPE_MASK 0xc |
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#define ZPCI_TABLE_TYPE_RFX 0xc |
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#define ZPCI_TABLE_TYPE_RSX 0x8 |
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#define ZPCI_TABLE_TYPE_RTX 0x4 |
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#define ZPCI_TABLE_TYPE_SX 0x0 |
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#define ZPCI_TABLE_LEN_RFX 0x3 |
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#define ZPCI_TABLE_LEN_RSX 0x3 |
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#define ZPCI_TABLE_LEN_RTX 0x3 |
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#define ZPCI_TABLE_OFFSET_MASK 0xc0 |
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#define ZPCI_TABLE_SIZE 0x4000 |
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#define ZPCI_TABLE_ALIGN ZPCI_TABLE_SIZE |
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#define ZPCI_TABLE_ENTRY_SIZE (sizeof(unsigned long)) |
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#define ZPCI_TABLE_ENTRIES (ZPCI_TABLE_SIZE / ZPCI_TABLE_ENTRY_SIZE) |
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#define ZPCI_TABLE_BITS 11 |
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#define ZPCI_PT_BITS 8 |
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#define ZPCI_ST_SHIFT (ZPCI_PT_BITS + PAGE_SHIFT) |
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#define ZPCI_RT_SHIFT (ZPCI_ST_SHIFT + ZPCI_TABLE_BITS) |
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#define ZPCI_RTE_FLAG_MASK 0x3fffUL |
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#define ZPCI_RTE_ADDR_MASK (~ZPCI_RTE_FLAG_MASK) |
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#define ZPCI_STE_FLAG_MASK 0x7ffUL |
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#define ZPCI_STE_ADDR_MASK (~ZPCI_STE_FLAG_MASK) |
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/* I/O Page tables */ |
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#define ZPCI_PTE_VALID_MASK 0x400 |
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#define ZPCI_PTE_INVALID 0x400 |
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#define ZPCI_PTE_VALID 0x000 |
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#define ZPCI_PT_SIZE 0x800 |
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#define ZPCI_PT_ALIGN ZPCI_PT_SIZE |
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#define ZPCI_PT_ENTRIES (ZPCI_PT_SIZE / ZPCI_TABLE_ENTRY_SIZE) |
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#define ZPCI_PT_MASK (ZPCI_PT_ENTRIES - 1) |
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#define ZPCI_PTE_FLAG_MASK 0xfffUL |
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#define ZPCI_PTE_ADDR_MASK (~ZPCI_PTE_FLAG_MASK) |
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/* Shared bits */ |
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#define ZPCI_TABLE_VALID 0x00 |
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#define ZPCI_TABLE_INVALID 0x20 |
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#define ZPCI_TABLE_PROTECTED 0x200 |
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#define ZPCI_TABLE_UNPROTECTED 0x000 |
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#define ZPCI_TABLE_VALID_MASK 0x20 |
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#define ZPCI_TABLE_PROT_MASK 0x200 |
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static inline unsigned int calc_rtx(dma_addr_t ptr) |
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{ |
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return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK; |
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} |
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static inline unsigned int calc_sx(dma_addr_t ptr) |
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{ |
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return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK; |
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} |
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static inline unsigned int calc_px(dma_addr_t ptr) |
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{ |
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return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK; |
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} |
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static inline void set_pt_pfaa(unsigned long *entry, void *pfaa) |
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{ |
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*entry &= ZPCI_PTE_FLAG_MASK; |
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*entry |= ((unsigned long) pfaa & ZPCI_PTE_ADDR_MASK); |
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} |
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static inline void set_rt_sto(unsigned long *entry, void *sto) |
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{ |
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*entry &= ZPCI_RTE_FLAG_MASK; |
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*entry |= ((unsigned long) sto & ZPCI_RTE_ADDR_MASK); |
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*entry |= ZPCI_TABLE_TYPE_RTX; |
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} |
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static inline void set_st_pto(unsigned long *entry, void *pto) |
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{ |
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*entry &= ZPCI_STE_FLAG_MASK; |
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*entry |= ((unsigned long) pto & ZPCI_STE_ADDR_MASK); |
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*entry |= ZPCI_TABLE_TYPE_SX; |
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} |
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static inline void validate_rt_entry(unsigned long *entry) |
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{ |
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*entry &= ~ZPCI_TABLE_VALID_MASK; |
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*entry &= ~ZPCI_TABLE_OFFSET_MASK; |
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*entry |= ZPCI_TABLE_VALID; |
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*entry |= ZPCI_TABLE_LEN_RTX; |
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} |
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static inline void validate_st_entry(unsigned long *entry) |
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{ |
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*entry &= ~ZPCI_TABLE_VALID_MASK; |
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*entry |= ZPCI_TABLE_VALID; |
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} |
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static inline void invalidate_pt_entry(unsigned long *entry) |
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{ |
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WARN_ON_ONCE((*entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_INVALID); |
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*entry &= ~ZPCI_PTE_VALID_MASK; |
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*entry |= ZPCI_PTE_INVALID; |
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} |
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static inline void validate_pt_entry(unsigned long *entry) |
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{ |
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WARN_ON_ONCE((*entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID); |
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*entry &= ~ZPCI_PTE_VALID_MASK; |
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*entry |= ZPCI_PTE_VALID; |
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} |
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static inline void entry_set_protected(unsigned long *entry) |
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{ |
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*entry &= ~ZPCI_TABLE_PROT_MASK; |
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*entry |= ZPCI_TABLE_PROTECTED; |
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} |
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static inline void entry_clr_protected(unsigned long *entry) |
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{ |
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*entry &= ~ZPCI_TABLE_PROT_MASK; |
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*entry |= ZPCI_TABLE_UNPROTECTED; |
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} |
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static inline int reg_entry_isvalid(unsigned long entry) |
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{ |
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return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID; |
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} |
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static inline int pt_entry_isvalid(unsigned long entry) |
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{ |
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return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID; |
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} |
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static inline unsigned long *get_rt_sto(unsigned long entry) |
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{ |
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return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX) |
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? (unsigned long *) (entry & ZPCI_RTE_ADDR_MASK) |
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: NULL; |
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} |
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static inline unsigned long *get_st_pto(unsigned long entry) |
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{ |
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return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX) |
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? (unsigned long *) (entry & ZPCI_STE_ADDR_MASK) |
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: NULL; |
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} |
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/* Prototypes */ |
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int zpci_dma_init_device(struct zpci_dev *); |
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void zpci_dma_exit_device(struct zpci_dev *); |
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void dma_free_seg_table(unsigned long); |
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unsigned long *dma_alloc_cpu_table(void); |
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void dma_cleanup_tables(unsigned long *); |
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unsigned long *dma_walk_cpu_trans(unsigned long *rto, dma_addr_t dma_addr); |
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void dma_update_cpu_trans(unsigned long *entry, void *page_addr, int flags); |
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extern const struct dma_map_ops s390_pci_dma_ops; |
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#endif
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