1 #ifndef __ASM_S390_PCI_H
2 #define __ASM_S390_PCI_H
3
4 /* must be set before including asm-generic/pci.h */
5 #define PCI_DMA_BUS_IS_PHYS (0)
6 /* must be set before including pci_clp.h */
7 #define PCI_BAR_COUNT 6
8
9 #include <linux/pci.h>
10 #include <asm-generic/pci.h>
11 #include <asm-generic/pci-dma-compat.h>
12 #include <asm/pci_clp.h>
13 #include <asm/pci_debug.h>
14
15 #define PCIBIOS_MIN_IO 0x1000
16 #define PCIBIOS_MIN_MEM 0x10000000
17
18 #define pcibios_assign_all_busses() (0)
19
20 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
21 void pci_iounmap(struct pci_dev *, void __iomem *);
22 int pci_domain_nr(struct pci_bus *);
23 int pci_proc_domain(struct pci_bus *);
24
25 #define ZPCI_BUS_NR 0 /* default bus number */
26 #define ZPCI_DEVFN 0 /* default device number */
27
28 /* PCI Function Controls */
29 #define ZPCI_FC_FN_ENABLED 0x80
30 #define ZPCI_FC_ERROR 0x40
31 #define ZPCI_FC_BLOCKED 0x20
32 #define ZPCI_FC_DMA_ENABLED 0x10
33
34 struct zpci_fmb {
35 u32 format : 8;
36 u32 dma_valid : 1;
37 u32 : 23;
38 u32 samples;
39 u64 last_update;
40 /* hardware counters */
41 u64 ld_ops;
42 u64 st_ops;
43 u64 stb_ops;
44 u64 rpcit_ops;
45 u64 dma_rbytes;
46 u64 dma_wbytes;
47 } __packed __aligned(64);
48
49 #define ZPCI_MSI_VEC_BITS 11
50 #define ZPCI_MSI_VEC_MAX (1 << ZPCI_MSI_VEC_BITS)
51 #define ZPCI_MSI_VEC_MASK (ZPCI_MSI_VEC_MAX - 1)
52
53 enum zpci_state {
54 ZPCI_FN_STATE_RESERVED,
55 ZPCI_FN_STATE_STANDBY,
56 ZPCI_FN_STATE_CONFIGURED,
57 ZPCI_FN_STATE_ONLINE,
58 NR_ZPCI_FN_STATES,
59 };
60
61 struct zpci_bar_struct {
62 struct resource *res; /* bus resource */
63 u32 val; /* bar start & 3 flag bits */
64 u16 map_idx; /* index into bar mapping array */
65 u8 size; /* order 2 exponent */
66 };
67
68 /* Private data per function */
69 struct zpci_dev {
70 struct pci_dev *pdev;
71 struct pci_bus *bus;
72 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
73
74 enum zpci_state state;
75 u32 fid; /* function ID, used by sclp */
76 u32 fh; /* function handle, used by insn's */
77 u16 vfn; /* virtual function number */
78 u16 pchid; /* physical channel ID */
79 u8 pfgid; /* function group ID */
80 u8 pft; /* pci function type */
81 u16 domain;
82
83 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
84 u32 uid; /* user defined id */
85 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
86
87 /* IRQ stuff */
88 u64 msi_addr; /* MSI address */
89 struct airq_iv *aibv; /* adapter interrupt bit vector */
90 unsigned int aisb; /* number of the summary bit */
91
92 /* DMA stuff */
93 unsigned long *dma_table;
94 spinlock_t dma_table_lock;
95 int tlb_refresh;
96
97 spinlock_t iommu_bitmap_lock;
98 unsigned long *iommu_bitmap;
99 unsigned long iommu_size;
100 unsigned long iommu_pages;
101 unsigned int next_bit;
102
103 char res_name[16];
104 struct zpci_bar_struct bars[PCI_BAR_COUNT];
105
106 u64 start_dma; /* Start of available DMA addresses */
107 u64 end_dma; /* End of available DMA addresses */
108 u64 dma_mask; /* DMA address space mask */
109
110 /* Function measurement block */
111 struct zpci_fmb *fmb;
112 u16 fmb_update; /* update interval */
113 /* software counters */
114 atomic64_t allocated_pages;
115 atomic64_t mapped_pages;
116 atomic64_t unmapped_pages;
117
118 enum pci_bus_speed max_bus_speed;
119
120 struct dentry *debugfs_dev;
121 struct dentry *debugfs_perf;
122 };
123
zdev_enabled(struct zpci_dev * zdev)124 static inline bool zdev_enabled(struct zpci_dev *zdev)
125 {
126 return (zdev->fh & (1UL << 31)) ? true : false;
127 }
128
129 extern const struct attribute_group *zpci_attr_groups[];
130
131 /* -----------------------------------------------------------------------------
132 Prototypes
133 ----------------------------------------------------------------------------- */
134 /* Base stuff */
135 int zpci_create_device(struct zpci_dev *);
136 int zpci_enable_device(struct zpci_dev *);
137 int zpci_disable_device(struct zpci_dev *);
138 void zpci_stop_device(struct zpci_dev *);
139 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
140 int zpci_unregister_ioat(struct zpci_dev *, u8);
141
142 /* CLP */
143 int clp_scan_pci_devices(void);
144 int clp_rescan_pci_devices(void);
145 int clp_rescan_pci_devices_simple(void);
146 int clp_add_pci_device(u32, u32, int);
147 int clp_enable_fh(struct zpci_dev *, u8);
148 int clp_disable_fh(struct zpci_dev *);
149
150 #ifdef CONFIG_PCI
151 /* Error handling and recovery */
152 void zpci_event_error(void *);
153 void zpci_event_availability(void *);
154 void zpci_rescan(void);
155 bool zpci_is_enabled(void);
156 #else /* CONFIG_PCI */
zpci_event_error(void * e)157 static inline void zpci_event_error(void *e) {}
zpci_event_availability(void * e)158 static inline void zpci_event_availability(void *e) {}
zpci_rescan(void)159 static inline void zpci_rescan(void) {}
160 #endif /* CONFIG_PCI */
161
162 #ifdef CONFIG_HOTPLUG_PCI_S390
163 int zpci_init_slot(struct zpci_dev *);
164 void zpci_exit_slot(struct zpci_dev *);
165 #else /* CONFIG_HOTPLUG_PCI_S390 */
zpci_init_slot(struct zpci_dev * zdev)166 static inline int zpci_init_slot(struct zpci_dev *zdev)
167 {
168 return 0;
169 }
zpci_exit_slot(struct zpci_dev * zdev)170 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
171 #endif /* CONFIG_HOTPLUG_PCI_S390 */
172
173 /* Helpers */
174 struct zpci_dev *get_zdev(struct pci_dev *);
175 struct zpci_dev *get_zdev_by_fid(u32);
176
177 /* DMA */
178 int zpci_dma_init(void);
179 void zpci_dma_exit(void);
180
181 /* FMB */
182 int zpci_fmb_enable_device(struct zpci_dev *);
183 int zpci_fmb_disable_device(struct zpci_dev *);
184
185 /* Debug */
186 int zpci_debug_init(void);
187 void zpci_debug_exit(void);
188 void zpci_debug_init_device(struct zpci_dev *);
189 void zpci_debug_exit_device(struct zpci_dev *);
190 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
191
192 #endif
193