1 #ifndef __ASM_S390_PCI_H
2 #define __ASM_S390_PCI_H
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
10 #include <linux/mutex.h>
11 #include <asm-generic/pci.h>
12 #include <asm/pci_clp.h>
13 #include <asm/pci_debug.h>
15 #define PCIBIOS_MIN_IO 0x1000
16 #define PCIBIOS_MIN_MEM 0x10000000
18 #define pcibios_assign_all_busses() (0)
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 *);
25 #define ZPCI_BUS_NR 0 /* default bus number */
26 #define ZPCI_DEVFN 0 /* default device number */
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
40 /* hardware counters */
47 } __packed __aligned(64);
50 ZPCI_FN_STATE_RESERVED,
51 ZPCI_FN_STATE_STANDBY,
52 ZPCI_FN_STATE_CONFIGURED,
57 struct zpci_bar_struct {
58 struct resource *res; /* bus resource */
59 u32 val; /* bar start & 3 flag bits */
60 u16 map_idx; /* index into bar mapping array */
61 u8 size; /* order 2 exponent */
66 /* Private data per function */
69 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
71 enum zpci_state state;
72 u32 fid; /* function ID, used by sclp */
73 u32 fh; /* function handle, used by insn's */
74 u16 vfn; /* virtual function number */
75 u16 pchid; /* physical channel ID */
76 u8 pfgid; /* function group ID */
77 u8 pft; /* pci function type */
81 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
82 u32 uid; /* user defined id */
83 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
86 u64 msi_addr; /* MSI address */
87 unsigned int max_msi; /* maximum number of MSI's */
88 struct airq_iv *aibv; /* adapter interrupt bit vector */
89 unsigned int aisb; /* number of the summary bit */
92 unsigned long *dma_table;
93 spinlock_t dma_table_lock;
96 spinlock_t iommu_bitmap_lock;
97 unsigned long *iommu_bitmap;
98 unsigned long iommu_size;
99 unsigned long iommu_pages;
100 unsigned int next_bit;
103 struct zpci_bar_struct bars[PCI_BAR_COUNT];
105 u64 start_dma; /* Start of available DMA addresses */
106 u64 end_dma; /* End of available DMA addresses */
107 u64 dma_mask; /* DMA address space mask */
109 /* Function measurement block */
110 struct zpci_fmb *fmb;
111 u16 fmb_update; /* update interval */
112 /* software counters */
113 atomic64_t allocated_pages;
114 atomic64_t mapped_pages;
115 atomic64_t unmapped_pages;
117 enum pci_bus_speed max_bus_speed;
119 struct dentry *debugfs_dev;
120 struct dentry *debugfs_perf;
122 struct s390_domain *s390_domain; /* s390 IOMMU domain data */
125 static inline bool zdev_enabled(struct zpci_dev *zdev)
127 return (zdev->fh & (1UL << 31)) ? true : false;
130 extern const struct attribute_group *zpci_attr_groups[];
132 /* -----------------------------------------------------------------------------
134 ----------------------------------------------------------------------------- */
136 int zpci_create_device(struct zpci_dev *);
137 int zpci_enable_device(struct zpci_dev *);
138 int zpci_disable_device(struct zpci_dev *);
139 void zpci_stop_device(struct zpci_dev *);
140 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
141 int zpci_unregister_ioat(struct zpci_dev *, u8);
144 int clp_scan_pci_devices(void);
145 int clp_rescan_pci_devices(void);
146 int clp_rescan_pci_devices_simple(void);
147 int clp_add_pci_device(u32, u32, int);
148 int clp_enable_fh(struct zpci_dev *, u8);
149 int clp_disable_fh(struct zpci_dev *);
152 /* Error handling and recovery */
153 void zpci_event_error(void *);
154 void zpci_event_availability(void *);
155 void zpci_rescan(void);
156 bool zpci_is_enabled(void);
157 #else /* CONFIG_PCI */
158 static inline void zpci_event_error(void *e) {}
159 static inline void zpci_event_availability(void *e) {}
160 static inline void zpci_rescan(void) {}
161 #endif /* CONFIG_PCI */
163 #ifdef CONFIG_HOTPLUG_PCI_S390
164 int zpci_init_slot(struct zpci_dev *);
165 void zpci_exit_slot(struct zpci_dev *);
166 #else /* CONFIG_HOTPLUG_PCI_S390 */
167 static inline int zpci_init_slot(struct zpci_dev *zdev)
171 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
172 #endif /* CONFIG_HOTPLUG_PCI_S390 */
175 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
177 return pdev->sysdata;
180 struct zpci_dev *get_zdev_by_fid(u32);
183 int zpci_dma_init(void);
184 void zpci_dma_exit(void);
187 int zpci_fmb_enable_device(struct zpci_dev *);
188 int zpci_fmb_disable_device(struct zpci_dev *);
191 int zpci_debug_init(void);
192 void zpci_debug_exit(void);
193 void zpci_debug_init_device(struct zpci_dev *, const char *);
194 void zpci_debug_exit_device(struct zpci_dev *);
195 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
199 /* Returns the node based on PCI bus */
200 static inline int __pcibus_to_node(const struct pci_bus *bus)
205 static inline const struct cpumask *
206 cpumask_of_pcibus(const struct pci_bus *bus)
208 return cpu_online_mask;
211 #endif /* CONFIG_NUMA */