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 <linux/mutex.h>
11 #include <asm-generic/pci.h>
12 #include <asm-generic/pci-dma-compat.h>
13 #include <asm/pci_clp.h>
14 #include <asm/pci_debug.h>
15
16 #define PCIBIOS_MIN_IO 0x1000
17 #define PCIBIOS_MIN_MEM 0x10000000
18
19 #define pcibios_assign_all_busses() (0)
20
21 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
22 void pci_iounmap(struct pci_dev *, void __iomem *);
23 int pci_domain_nr(struct pci_bus *);
24 int pci_proc_domain(struct pci_bus *);
25
26 #define ZPCI_BUS_NR 0 /* default bus number */
27 #define ZPCI_DEVFN 0 /* default device number */
28
29 /* PCI Function Controls */
30 #define ZPCI_FC_FN_ENABLED 0x80
31 #define ZPCI_FC_ERROR 0x40
32 #define ZPCI_FC_BLOCKED 0x20
33 #define ZPCI_FC_DMA_ENABLED 0x10
34
35 struct zpci_fmb {
36 u32 format : 8;
37 u32 dma_valid : 1;
38 u32 : 23;
39 u32 samples;
40 u64 last_update;
41 /* hardware counters */
42 u64 ld_ops;
43 u64 st_ops;
44 u64 stb_ops;
45 u64 rpcit_ops;
46 u64 dma_rbytes;
47 u64 dma_wbytes;
48 u64 pad[2];
49 } __packed __aligned(128);
50
51 enum zpci_state {
52 ZPCI_FN_STATE_RESERVED,
53 ZPCI_FN_STATE_STANDBY,
54 ZPCI_FN_STATE_CONFIGURED,
55 ZPCI_FN_STATE_ONLINE,
56 NR_ZPCI_FN_STATES,
57 };
58
59 struct zpci_bar_struct {
60 struct resource *res; /* bus resource */
61 u32 val; /* bar start & 3 flag bits */
62 u16 map_idx; /* index into bar mapping array */
63 u8 size; /* order 2 exponent */
64 };
65
66 struct s390_domain;
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 struct mutex lock;
84 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
85 u32 uid; /* user defined id */
86 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
87
88 /* IRQ stuff */
89 u64 msi_addr; /* MSI address */
90 unsigned int max_msi; /* maximum number of MSI's */
91 struct airq_iv *aibv; /* adapter interrupt bit vector */
92 unsigned int aisb; /* number of the summary bit */
93
94 /* DMA stuff */
95 unsigned long *dma_table;
96 spinlock_t dma_table_lock;
97 int tlb_refresh;
98
99 spinlock_t iommu_bitmap_lock;
100 unsigned long *iommu_bitmap;
101 unsigned long iommu_size;
102 unsigned long iommu_pages;
103 unsigned int next_bit;
104
105 char res_name[16];
106 struct zpci_bar_struct bars[PCI_BAR_COUNT];
107
108 u64 start_dma; /* Start of available DMA addresses */
109 u64 end_dma; /* End of available DMA addresses */
110 u64 dma_mask; /* DMA address space mask */
111
112 /* Function measurement block */
113 struct zpci_fmb *fmb;
114 u16 fmb_update; /* update interval */
115 /* software counters */
116 atomic64_t allocated_pages;
117 atomic64_t mapped_pages;
118 atomic64_t unmapped_pages;
119
120 enum pci_bus_speed max_bus_speed;
121
122 struct dentry *debugfs_dev;
123 struct dentry *debugfs_perf;
124
125 struct s390_domain *s390_domain; /* s390 IOMMU domain data */
126 };
127
zdev_enabled(struct zpci_dev * zdev)128 static inline bool zdev_enabled(struct zpci_dev *zdev)
129 {
130 return (zdev->fh & (1UL << 31)) ? true : false;
131 }
132
133 extern const struct attribute_group *zpci_attr_groups[];
134
135 /* -----------------------------------------------------------------------------
136 Prototypes
137 ----------------------------------------------------------------------------- */
138 /* Base stuff */
139 int zpci_create_device(struct zpci_dev *);
140 int zpci_enable_device(struct zpci_dev *);
141 int zpci_disable_device(struct zpci_dev *);
142 void zpci_stop_device(struct zpci_dev *);
143 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
144 int zpci_unregister_ioat(struct zpci_dev *, u8);
145
146 /* CLP */
147 int clp_scan_pci_devices(void);
148 int clp_rescan_pci_devices(void);
149 int clp_rescan_pci_devices_simple(void);
150 int clp_add_pci_device(u32, u32, int);
151 int clp_enable_fh(struct zpci_dev *, u8);
152 int clp_disable_fh(struct zpci_dev *);
153
154 #ifdef CONFIG_PCI
155 /* Error handling and recovery */
156 void zpci_event_error(void *);
157 void zpci_event_availability(void *);
158 void zpci_rescan(void);
159 bool zpci_is_enabled(void);
160 #else /* CONFIG_PCI */
zpci_event_error(void * e)161 static inline void zpci_event_error(void *e) {}
zpci_event_availability(void * e)162 static inline void zpci_event_availability(void *e) {}
zpci_rescan(void)163 static inline void zpci_rescan(void) {}
164 #endif /* CONFIG_PCI */
165
166 #ifdef CONFIG_HOTPLUG_PCI_S390
167 int zpci_init_slot(struct zpci_dev *);
168 void zpci_exit_slot(struct zpci_dev *);
169 #else /* CONFIG_HOTPLUG_PCI_S390 */
zpci_init_slot(struct zpci_dev * zdev)170 static inline int zpci_init_slot(struct zpci_dev *zdev)
171 {
172 return 0;
173 }
zpci_exit_slot(struct zpci_dev * zdev)174 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
175 #endif /* CONFIG_HOTPLUG_PCI_S390 */
176
177 /* Helpers */
to_zpci(struct pci_dev * pdev)178 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
179 {
180 return pdev->sysdata;
181 }
182
183 struct zpci_dev *get_zdev_by_fid(u32);
184
185 /* DMA */
186 int zpci_dma_init(void);
187 void zpci_dma_exit(void);
188
189 /* FMB */
190 int zpci_fmb_enable_device(struct zpci_dev *);
191 int zpci_fmb_disable_device(struct zpci_dev *);
192
193 /* Debug */
194 int zpci_debug_init(void);
195 void zpci_debug_exit(void);
196 void zpci_debug_init_device(struct zpci_dev *);
197 void zpci_debug_exit_device(struct zpci_dev *);
198 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
199
200 #ifdef CONFIG_NUMA
201
202 /* Returns the node based on PCI bus */
__pcibus_to_node(const struct pci_bus * bus)203 static inline int __pcibus_to_node(const struct pci_bus *bus)
204 {
205 return NUMA_NO_NODE;
206 }
207
208 static inline const struct cpumask *
cpumask_of_pcibus(const struct pci_bus * bus)209 cpumask_of_pcibus(const struct pci_bus *bus)
210 {
211 return cpu_online_mask;
212 }
213
214 #endif /* CONFIG_NUMA */
215
216 #endif
217