1#ifndef _ASM_S390_PCI_DMA_H
2#define _ASM_S390_PCI_DMA_H
3
4/* I/O Translation Anchor (IOTA) */
5enum 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
82static inline unsigned int calc_rtx(dma_addr_t ptr)
83{
84	return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK;
85}
86
87static inline unsigned int calc_sx(dma_addr_t ptr)
88{
89	return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK;
90}
91
92static inline unsigned int calc_px(dma_addr_t ptr)
93{
94	return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK;
95}
96
97static 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
103static 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
110static 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
117static 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
125static inline void validate_st_entry(unsigned long *entry)
126{
127	*entry &= ~ZPCI_TABLE_VALID_MASK;
128	*entry |= ZPCI_TABLE_VALID;
129}
130
131static inline void invalidate_table_entry(unsigned long *entry)
132{
133	*entry &= ~ZPCI_TABLE_VALID_MASK;
134	*entry |= ZPCI_TABLE_INVALID;
135}
136
137static 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
144static 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
151static inline void entry_set_protected(unsigned long *entry)
152{
153	*entry &= ~ZPCI_TABLE_PROT_MASK;
154	*entry |= ZPCI_TABLE_PROTECTED;
155}
156
157static inline void entry_clr_protected(unsigned long *entry)
158{
159	*entry &= ~ZPCI_TABLE_PROT_MASK;
160	*entry |= ZPCI_TABLE_UNPROTECTED;
161}
162
163static inline int reg_entry_isvalid(unsigned long entry)
164{
165	return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID;
166}
167
168static inline int pt_entry_isvalid(unsigned long entry)
169{
170	return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID;
171}
172
173static inline int entry_isprotected(unsigned long entry)
174{
175	return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED;
176}
177
178static 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
185static 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 */
193int zpci_dma_init_device(struct zpci_dev *);
194void zpci_dma_exit_device(struct zpci_dev *);
195
196#endif
197