Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 1 | #ifndef _ASM_S390_PCI_DMA_H |
| 2 | #define _ASM_S390_PCI_DMA_H |
| 3 | |
| 4 | /* I/O Translation Anchor (IOTA) */ |
| 5 | enum zpci_ioat_dtype { |
| 6 | ZPCI_IOTA_STO = 0, |
| 7 | ZPCI_IOTA_RTTO = 1, |
| 8 | ZPCI_IOTA_RSTO = 2, |
| 9 | ZPCI_IOTA_RFTO = 3, |
| 10 | ZPCI_IOTA_PFAA = 4, |
| 11 | ZPCI_IOTA_IOPFAA = 5, |
| 12 | ZPCI_IOTA_IOPTO = 7 |
| 13 | }; |
| 14 | |
| 15 | #define ZPCI_IOTA_IOT_ENABLED 0x800UL |
| 16 | #define ZPCI_IOTA_DT_ST (ZPCI_IOTA_STO << 2) |
| 17 | #define ZPCI_IOTA_DT_RT (ZPCI_IOTA_RTTO << 2) |
| 18 | #define ZPCI_IOTA_DT_RS (ZPCI_IOTA_RSTO << 2) |
| 19 | #define ZPCI_IOTA_DT_RF (ZPCI_IOTA_RFTO << 2) |
| 20 | #define ZPCI_IOTA_DT_PF (ZPCI_IOTA_PFAA << 2) |
| 21 | #define ZPCI_IOTA_FS_4K 0 |
| 22 | #define ZPCI_IOTA_FS_1M 1 |
| 23 | #define ZPCI_IOTA_FS_2G 2 |
| 24 | #define ZPCI_KEY (PAGE_DEFAULT_KEY << 5) |
| 25 | |
| 26 | #define ZPCI_IOTA_STO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_ST) |
| 27 | #define ZPCI_IOTA_RTTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RT) |
| 28 | #define ZPCI_IOTA_RSTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RS) |
| 29 | #define ZPCI_IOTA_RFTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RF) |
| 30 | #define ZPCI_IOTA_RFAA_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_PF | ZPCI_IOTA_FS_2G) |
| 31 | |
| 32 | /* I/O Region and segment tables */ |
| 33 | #define ZPCI_INDEX_MASK 0x7ffUL |
| 34 | |
| 35 | #define ZPCI_TABLE_TYPE_MASK 0xc |
| 36 | #define ZPCI_TABLE_TYPE_RFX 0xc |
| 37 | #define ZPCI_TABLE_TYPE_RSX 0x8 |
| 38 | #define ZPCI_TABLE_TYPE_RTX 0x4 |
| 39 | #define ZPCI_TABLE_TYPE_SX 0x0 |
| 40 | |
| 41 | #define ZPCI_TABLE_LEN_RFX 0x3 |
| 42 | #define ZPCI_TABLE_LEN_RSX 0x3 |
| 43 | #define ZPCI_TABLE_LEN_RTX 0x3 |
| 44 | |
| 45 | #define ZPCI_TABLE_OFFSET_MASK 0xc0 |
| 46 | #define ZPCI_TABLE_SIZE 0x4000 |
| 47 | #define ZPCI_TABLE_ALIGN ZPCI_TABLE_SIZE |
| 48 | #define ZPCI_TABLE_ENTRY_SIZE (sizeof(unsigned long)) |
| 49 | #define ZPCI_TABLE_ENTRIES (ZPCI_TABLE_SIZE / ZPCI_TABLE_ENTRY_SIZE) |
| 50 | |
| 51 | #define ZPCI_TABLE_BITS 11 |
| 52 | #define ZPCI_PT_BITS 8 |
| 53 | #define ZPCI_ST_SHIFT (ZPCI_PT_BITS + PAGE_SHIFT) |
| 54 | #define ZPCI_RT_SHIFT (ZPCI_ST_SHIFT + ZPCI_TABLE_BITS) |
| 55 | |
| 56 | #define ZPCI_RTE_FLAG_MASK 0x3fffUL |
| 57 | #define ZPCI_RTE_ADDR_MASK (~ZPCI_RTE_FLAG_MASK) |
| 58 | #define ZPCI_STE_FLAG_MASK 0x7ffUL |
| 59 | #define ZPCI_STE_ADDR_MASK (~ZPCI_STE_FLAG_MASK) |
| 60 | |
| 61 | /* I/O Page tables */ |
| 62 | #define ZPCI_PTE_VALID_MASK 0x400 |
| 63 | #define ZPCI_PTE_INVALID 0x400 |
| 64 | #define ZPCI_PTE_VALID 0x000 |
| 65 | #define ZPCI_PT_SIZE 0x800 |
| 66 | #define ZPCI_PT_ALIGN ZPCI_PT_SIZE |
| 67 | #define ZPCI_PT_ENTRIES (ZPCI_PT_SIZE / ZPCI_TABLE_ENTRY_SIZE) |
| 68 | #define ZPCI_PT_MASK (ZPCI_PT_ENTRIES - 1) |
| 69 | |
| 70 | #define ZPCI_PTE_FLAG_MASK 0xfffUL |
| 71 | #define ZPCI_PTE_ADDR_MASK (~ZPCI_PTE_FLAG_MASK) |
| 72 | |
| 73 | /* Shared bits */ |
| 74 | #define ZPCI_TABLE_VALID 0x00 |
| 75 | #define ZPCI_TABLE_INVALID 0x20 |
| 76 | #define ZPCI_TABLE_PROTECTED 0x200 |
| 77 | #define ZPCI_TABLE_UNPROTECTED 0x000 |
| 78 | |
| 79 | #define ZPCI_TABLE_VALID_MASK 0x20 |
| 80 | #define ZPCI_TABLE_PROT_MASK 0x200 |
| 81 | |
| 82 | static inline unsigned int calc_rtx(dma_addr_t ptr) |
| 83 | { |
| 84 | return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK; |
| 85 | } |
| 86 | |
| 87 | static inline unsigned int calc_sx(dma_addr_t ptr) |
| 88 | { |
| 89 | return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK; |
| 90 | } |
| 91 | |
| 92 | static inline unsigned int calc_px(dma_addr_t ptr) |
| 93 | { |
| 94 | return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK; |
| 95 | } |
| 96 | |
| 97 | static inline void set_pt_pfaa(unsigned long *entry, void *pfaa) |
| 98 | { |
| 99 | *entry &= ZPCI_PTE_FLAG_MASK; |
| 100 | *entry |= ((unsigned long) pfaa & ZPCI_PTE_ADDR_MASK); |
| 101 | } |
| 102 | |
| 103 | static inline void set_rt_sto(unsigned long *entry, void *sto) |
| 104 | { |
| 105 | *entry &= ZPCI_RTE_FLAG_MASK; |
| 106 | *entry |= ((unsigned long) sto & ZPCI_RTE_ADDR_MASK); |
| 107 | *entry |= ZPCI_TABLE_TYPE_RTX; |
| 108 | } |
| 109 | |
| 110 | static inline void set_st_pto(unsigned long *entry, void *pto) |
| 111 | { |
| 112 | *entry &= ZPCI_STE_FLAG_MASK; |
| 113 | *entry |= ((unsigned long) pto & ZPCI_STE_ADDR_MASK); |
| 114 | *entry |= ZPCI_TABLE_TYPE_SX; |
| 115 | } |
| 116 | |
| 117 | static inline void validate_rt_entry(unsigned long *entry) |
| 118 | { |
| 119 | *entry &= ~ZPCI_TABLE_VALID_MASK; |
| 120 | *entry &= ~ZPCI_TABLE_OFFSET_MASK; |
| 121 | *entry |= ZPCI_TABLE_VALID; |
| 122 | *entry |= ZPCI_TABLE_LEN_RTX; |
| 123 | } |
| 124 | |
| 125 | static inline void validate_st_entry(unsigned long *entry) |
| 126 | { |
| 127 | *entry &= ~ZPCI_TABLE_VALID_MASK; |
| 128 | *entry |= ZPCI_TABLE_VALID; |
| 129 | } |
| 130 | |
| 131 | static inline void invalidate_table_entry(unsigned long *entry) |
| 132 | { |
| 133 | *entry &= ~ZPCI_TABLE_VALID_MASK; |
| 134 | *entry |= ZPCI_TABLE_INVALID; |
| 135 | } |
| 136 | |
| 137 | static inline void invalidate_pt_entry(unsigned long *entry) |
| 138 | { |
| 139 | WARN_ON_ONCE((*entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_INVALID); |
| 140 | *entry &= ~ZPCI_PTE_VALID_MASK; |
| 141 | *entry |= ZPCI_PTE_INVALID; |
| 142 | } |
| 143 | |
| 144 | static inline void validate_pt_entry(unsigned long *entry) |
| 145 | { |
| 146 | WARN_ON_ONCE((*entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID); |
| 147 | *entry &= ~ZPCI_PTE_VALID_MASK; |
| 148 | *entry |= ZPCI_PTE_VALID; |
| 149 | } |
| 150 | |
| 151 | static inline void entry_set_protected(unsigned long *entry) |
| 152 | { |
| 153 | *entry &= ~ZPCI_TABLE_PROT_MASK; |
| 154 | *entry |= ZPCI_TABLE_PROTECTED; |
| 155 | } |
| 156 | |
| 157 | static inline void entry_clr_protected(unsigned long *entry) |
| 158 | { |
| 159 | *entry &= ~ZPCI_TABLE_PROT_MASK; |
| 160 | *entry |= ZPCI_TABLE_UNPROTECTED; |
| 161 | } |
| 162 | |
| 163 | static inline int reg_entry_isvalid(unsigned long entry) |
| 164 | { |
| 165 | return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID; |
| 166 | } |
| 167 | |
| 168 | static inline int pt_entry_isvalid(unsigned long entry) |
| 169 | { |
| 170 | return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID; |
| 171 | } |
| 172 | |
| 173 | static inline int entry_isprotected(unsigned long entry) |
| 174 | { |
| 175 | return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED; |
| 176 | } |
| 177 | |
| 178 | static inline unsigned long *get_rt_sto(unsigned long entry) |
| 179 | { |
| 180 | return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX) |
| 181 | ? (unsigned long *) (entry & ZPCI_RTE_ADDR_MASK) |
| 182 | : NULL; |
| 183 | } |
| 184 | |
| 185 | static inline unsigned long *get_st_pto(unsigned long entry) |
| 186 | { |
| 187 | return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX) |
| 188 | ? (unsigned long *) (entry & ZPCI_STE_ADDR_MASK) |
| 189 | : NULL; |
| 190 | } |
| 191 | |
| 192 | /* Prototypes */ |
| 193 | int zpci_dma_init_device(struct zpci_dev *); |
| 194 | void zpci_dma_exit_device(struct zpci_dev *); |
Gerald Schaefer | 8128f23 | 2015-08-27 15:33:03 +0200 | [diff] [blame] | 195 | void dma_free_seg_table(unsigned long); |
| 196 | unsigned long *dma_alloc_cpu_table(void); |
| 197 | void dma_cleanup_tables(unsigned long *); |
| 198 | void dma_update_cpu_trans(unsigned long *, void *, dma_addr_t, int); |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 199 | #endif |