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828b35f6 JG |
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 | ||
69eea95c GS |
26 | #define ZPCI_TABLE_SIZE_RT (1UL << 42) |
27 | ||
828b35f6 JG |
28 | #define ZPCI_IOTA_STO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_ST) |
29 | #define ZPCI_IOTA_RTTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RT) | |
30 | #define ZPCI_IOTA_RSTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RS) | |
31 | #define ZPCI_IOTA_RFTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RF) | |
32 | #define ZPCI_IOTA_RFAA_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_PF | ZPCI_IOTA_FS_2G) | |
33 | ||
34 | /* I/O Region and segment tables */ | |
35 | #define ZPCI_INDEX_MASK 0x7ffUL | |
36 | ||
37 | #define ZPCI_TABLE_TYPE_MASK 0xc | |
38 | #define ZPCI_TABLE_TYPE_RFX 0xc | |
39 | #define ZPCI_TABLE_TYPE_RSX 0x8 | |
40 | #define ZPCI_TABLE_TYPE_RTX 0x4 | |
41 | #define ZPCI_TABLE_TYPE_SX 0x0 | |
42 | ||
43 | #define ZPCI_TABLE_LEN_RFX 0x3 | |
44 | #define ZPCI_TABLE_LEN_RSX 0x3 | |
45 | #define ZPCI_TABLE_LEN_RTX 0x3 | |
46 | ||
47 | #define ZPCI_TABLE_OFFSET_MASK 0xc0 | |
48 | #define ZPCI_TABLE_SIZE 0x4000 | |
49 | #define ZPCI_TABLE_ALIGN ZPCI_TABLE_SIZE | |
50 | #define ZPCI_TABLE_ENTRY_SIZE (sizeof(unsigned long)) | |
51 | #define ZPCI_TABLE_ENTRIES (ZPCI_TABLE_SIZE / ZPCI_TABLE_ENTRY_SIZE) | |
52 | ||
53 | #define ZPCI_TABLE_BITS 11 | |
54 | #define ZPCI_PT_BITS 8 | |
55 | #define ZPCI_ST_SHIFT (ZPCI_PT_BITS + PAGE_SHIFT) | |
56 | #define ZPCI_RT_SHIFT (ZPCI_ST_SHIFT + ZPCI_TABLE_BITS) | |
57 | ||
58 | #define ZPCI_RTE_FLAG_MASK 0x3fffUL | |
59 | #define ZPCI_RTE_ADDR_MASK (~ZPCI_RTE_FLAG_MASK) | |
60 | #define ZPCI_STE_FLAG_MASK 0x7ffUL | |
61 | #define ZPCI_STE_ADDR_MASK (~ZPCI_STE_FLAG_MASK) | |
62 | ||
63 | /* I/O Page tables */ | |
64 | #define ZPCI_PTE_VALID_MASK 0x400 | |
65 | #define ZPCI_PTE_INVALID 0x400 | |
66 | #define ZPCI_PTE_VALID 0x000 | |
67 | #define ZPCI_PT_SIZE 0x800 | |
68 | #define ZPCI_PT_ALIGN ZPCI_PT_SIZE | |
69 | #define ZPCI_PT_ENTRIES (ZPCI_PT_SIZE / ZPCI_TABLE_ENTRY_SIZE) | |
70 | #define ZPCI_PT_MASK (ZPCI_PT_ENTRIES - 1) | |
71 | ||
72 | #define ZPCI_PTE_FLAG_MASK 0xfffUL | |
73 | #define ZPCI_PTE_ADDR_MASK (~ZPCI_PTE_FLAG_MASK) | |
74 | ||
75 | /* Shared bits */ | |
76 | #define ZPCI_TABLE_VALID 0x00 | |
77 | #define ZPCI_TABLE_INVALID 0x20 | |
78 | #define ZPCI_TABLE_PROTECTED 0x200 | |
79 | #define ZPCI_TABLE_UNPROTECTED 0x000 | |
80 | ||
81 | #define ZPCI_TABLE_VALID_MASK 0x20 | |
82 | #define ZPCI_TABLE_PROT_MASK 0x200 | |
83 | ||
84 | static inline unsigned int calc_rtx(dma_addr_t ptr) | |
85 | { | |
86 | return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK; | |
87 | } | |
88 | ||
89 | static inline unsigned int calc_sx(dma_addr_t ptr) | |
90 | { | |
91 | return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK; | |
92 | } | |
93 | ||
94 | static inline unsigned int calc_px(dma_addr_t ptr) | |
95 | { | |
96 | return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK; | |
97 | } | |
98 | ||
99 | static inline void set_pt_pfaa(unsigned long *entry, void *pfaa) | |
100 | { | |
101 | *entry &= ZPCI_PTE_FLAG_MASK; | |
102 | *entry |= ((unsigned long) pfaa & ZPCI_PTE_ADDR_MASK); | |
103 | } | |
104 | ||
105 | static inline void set_rt_sto(unsigned long *entry, void *sto) | |
106 | { | |
107 | *entry &= ZPCI_RTE_FLAG_MASK; | |
108 | *entry |= ((unsigned long) sto & ZPCI_RTE_ADDR_MASK); | |
109 | *entry |= ZPCI_TABLE_TYPE_RTX; | |
110 | } | |
111 | ||
112 | static inline void set_st_pto(unsigned long *entry, void *pto) | |
113 | { | |
114 | *entry &= ZPCI_STE_FLAG_MASK; | |
115 | *entry |= ((unsigned long) pto & ZPCI_STE_ADDR_MASK); | |
116 | *entry |= ZPCI_TABLE_TYPE_SX; | |
117 | } | |
118 | ||
119 | static inline void validate_rt_entry(unsigned long *entry) | |
120 | { | |
121 | *entry &= ~ZPCI_TABLE_VALID_MASK; | |
122 | *entry &= ~ZPCI_TABLE_OFFSET_MASK; | |
123 | *entry |= ZPCI_TABLE_VALID; | |
124 | *entry |= ZPCI_TABLE_LEN_RTX; | |
125 | } | |
126 | ||
127 | static inline void validate_st_entry(unsigned long *entry) | |
128 | { | |
129 | *entry &= ~ZPCI_TABLE_VALID_MASK; | |
130 | *entry |= ZPCI_TABLE_VALID; | |
131 | } | |
132 | ||
133 | static inline void invalidate_table_entry(unsigned long *entry) | |
134 | { | |
135 | *entry &= ~ZPCI_TABLE_VALID_MASK; | |
136 | *entry |= ZPCI_TABLE_INVALID; | |
137 | } | |
138 | ||
139 | static inline void invalidate_pt_entry(unsigned long *entry) | |
140 | { | |
141 | WARN_ON_ONCE((*entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_INVALID); | |
142 | *entry &= ~ZPCI_PTE_VALID_MASK; | |
143 | *entry |= ZPCI_PTE_INVALID; | |
144 | } | |
145 | ||
146 | static inline void validate_pt_entry(unsigned long *entry) | |
147 | { | |
148 | WARN_ON_ONCE((*entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID); | |
149 | *entry &= ~ZPCI_PTE_VALID_MASK; | |
150 | *entry |= ZPCI_PTE_VALID; | |
151 | } | |
152 | ||
153 | static inline void entry_set_protected(unsigned long *entry) | |
154 | { | |
155 | *entry &= ~ZPCI_TABLE_PROT_MASK; | |
156 | *entry |= ZPCI_TABLE_PROTECTED; | |
157 | } | |
158 | ||
159 | static inline void entry_clr_protected(unsigned long *entry) | |
160 | { | |
161 | *entry &= ~ZPCI_TABLE_PROT_MASK; | |
162 | *entry |= ZPCI_TABLE_UNPROTECTED; | |
163 | } | |
164 | ||
165 | static inline int reg_entry_isvalid(unsigned long entry) | |
166 | { | |
167 | return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID; | |
168 | } | |
169 | ||
170 | static inline int pt_entry_isvalid(unsigned long entry) | |
171 | { | |
172 | return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID; | |
173 | } | |
174 | ||
175 | static inline int entry_isprotected(unsigned long entry) | |
176 | { | |
177 | return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED; | |
178 | } | |
179 | ||
180 | static inline unsigned long *get_rt_sto(unsigned long entry) | |
181 | { | |
182 | return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX) | |
183 | ? (unsigned long *) (entry & ZPCI_RTE_ADDR_MASK) | |
184 | : NULL; | |
185 | } | |
186 | ||
187 | static inline unsigned long *get_st_pto(unsigned long entry) | |
188 | { | |
189 | return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX) | |
190 | ? (unsigned long *) (entry & ZPCI_STE_ADDR_MASK) | |
191 | : NULL; | |
192 | } | |
193 | ||
194 | /* Prototypes */ | |
195 | int zpci_dma_init_device(struct zpci_dev *); | |
196 | void zpci_dma_exit_device(struct zpci_dev *); | |
8128f23c GS |
197 | void dma_free_seg_table(unsigned long); |
198 | unsigned long *dma_alloc_cpu_table(void); | |
199 | void dma_cleanup_tables(unsigned long *); | |
66728eee SO |
200 | unsigned long *dma_walk_cpu_trans(unsigned long *rto, dma_addr_t dma_addr); |
201 | void dma_update_cpu_trans(unsigned long *entry, void *page_addr, int flags); | |
202 | ||
828b35f6 | 203 | #endif |