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