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 <linux/iommu.h>
12 #include <asm-generic/pci.h>
13 #include <asm/pci_clp.h>
14 #include <asm/pci_debug.h>
17 #define PCIBIOS_MIN_IO 0x1000
18 #define PCIBIOS_MIN_MEM 0x10000000
20 #define pcibios_assign_all_busses() (0)
22 void __iomem
*pci_iomap(struct pci_dev
*, int, unsigned long);
23 void pci_iounmap(struct pci_dev
*, void __iomem
*);
24 int pci_domain_nr(struct pci_bus
*);
25 int pci_proc_domain(struct pci_bus
*);
27 #define ZPCI_BUS_NR 0 /* default bus number */
28 #define ZPCI_DEVFN 0 /* default device number */
30 /* PCI Function Controls */
31 #define ZPCI_FC_FN_ENABLED 0x80
32 #define ZPCI_FC_ERROR 0x40
33 #define ZPCI_FC_BLOCKED 0x20
34 #define ZPCI_FC_DMA_ENABLED 0x10
36 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
38 struct zpci_fmb_fmt0
{
43 struct zpci_fmb_fmt1
{
50 struct zpci_fmb_fmt2
{
51 u64 consumed_work_units
;
65 /* format specific counters */
67 struct zpci_fmb_fmt0 fmt0
;
68 struct zpci_fmb_fmt1 fmt1
;
69 struct zpci_fmb_fmt2 fmt2
;
71 } __packed
__aligned(128);
74 ZPCI_FN_STATE_STANDBY
= 0,
75 ZPCI_FN_STATE_CONFIGURED
= 1,
76 ZPCI_FN_STATE_RESERVED
= 2,
77 ZPCI_FN_STATE_ONLINE
= 3,
80 struct zpci_bar_struct
{
81 struct resource
*res
; /* bus resource */
82 u32 val
; /* bar start & 3 flag bits */
83 u16 map_idx
; /* index into bar mapping array */
84 u8 size
; /* order 2 exponent */
89 /* Private data per function */
92 struct list_head entry
; /* list of all zpci_devices, needed for hotplug, etc. */
94 enum zpci_state state
;
95 u32 fid
; /* function ID, used by sclp */
96 u32 fh
; /* function handle, used by insn's */
97 u16 vfn
; /* virtual function number */
98 u16 pchid
; /* physical channel ID */
99 u8 pfgid
; /* function group ID */
100 u8 pft
; /* pci function type */
104 u8 pfip
[CLP_PFIP_NR_SEGMENTS
]; /* pci function internal path */
105 u32 uid
; /* user defined id */
106 u8 util_str
[CLP_UTIL_STR_LEN
]; /* utility string */
109 u64 msi_addr
; /* MSI address */
110 unsigned int max_msi
; /* maximum number of MSI's */
111 struct airq_iv
*aibv
; /* adapter interrupt bit vector */
112 unsigned long aisb
; /* number of the summary bit */
115 unsigned long *dma_table
;
116 spinlock_t dma_table_lock
;
119 spinlock_t iommu_bitmap_lock
;
120 unsigned long *iommu_bitmap
;
121 unsigned long *lazy_bitmap
;
122 unsigned long iommu_size
;
123 unsigned long iommu_pages
;
124 unsigned int next_bit
;
126 struct iommu_device iommu_dev
; /* IOMMU core handle */
129 struct zpci_bar_struct bars
[PCI_BAR_COUNT
];
131 u64 start_dma
; /* Start of available DMA addresses */
132 u64 end_dma
; /* End of available DMA addresses */
133 u64 dma_mask
; /* DMA address space mask */
135 /* Function measurement block */
136 struct zpci_fmb
*fmb
;
137 u16 fmb_update
; /* update interval */
139 /* software counters */
140 atomic64_t allocated_pages
;
141 atomic64_t mapped_pages
;
142 atomic64_t unmapped_pages
;
144 enum pci_bus_speed max_bus_speed
;
146 struct dentry
*debugfs_dev
;
147 struct dentry
*debugfs_perf
;
149 struct s390_domain
*s390_domain
; /* s390 IOMMU domain data */
152 static inline bool zdev_enabled(struct zpci_dev
*zdev
)
154 return (zdev
->fh
& (1UL << 31)) ? true : false;
157 extern const struct attribute_group
*zpci_attr_groups
[];
159 /* -----------------------------------------------------------------------------
161 ----------------------------------------------------------------------------- */
163 int zpci_create_device(struct zpci_dev
*);
164 void zpci_remove_device(struct zpci_dev
*zdev
);
165 int zpci_enable_device(struct zpci_dev
*);
166 int zpci_disable_device(struct zpci_dev
*);
167 int zpci_register_ioat(struct zpci_dev
*, u8
, u64
, u64
, u64
);
168 int zpci_unregister_ioat(struct zpci_dev
*, u8
);
169 void zpci_remove_reserved_devices(void);
172 int clp_scan_pci_devices(void);
173 int clp_rescan_pci_devices(void);
174 int clp_rescan_pci_devices_simple(void);
175 int clp_add_pci_device(u32
, u32
, int);
176 int clp_enable_fh(struct zpci_dev
*, u8
);
177 int clp_disable_fh(struct zpci_dev
*);
178 int clp_get_state(u32 fid
, enum zpci_state
*state
);
180 /* IOMMU Interface */
181 int zpci_init_iommu(struct zpci_dev
*zdev
);
182 void zpci_destroy_iommu(struct zpci_dev
*zdev
);
185 /* Error handling and recovery */
186 void zpci_event_error(void *);
187 void zpci_event_availability(void *);
188 void zpci_rescan(void);
189 bool zpci_is_enabled(void);
190 #else /* CONFIG_PCI */
191 static inline void zpci_event_error(void *e
) {}
192 static inline void zpci_event_availability(void *e
) {}
193 static inline void zpci_rescan(void) {}
194 #endif /* CONFIG_PCI */
196 #ifdef CONFIG_HOTPLUG_PCI_S390
197 int zpci_init_slot(struct zpci_dev
*);
198 void zpci_exit_slot(struct zpci_dev
*);
199 #else /* CONFIG_HOTPLUG_PCI_S390 */
200 static inline int zpci_init_slot(struct zpci_dev
*zdev
)
204 static inline void zpci_exit_slot(struct zpci_dev
*zdev
) {}
205 #endif /* CONFIG_HOTPLUG_PCI_S390 */
208 static inline struct zpci_dev
*to_zpci(struct pci_dev
*pdev
)
210 return pdev
->sysdata
;
213 struct zpci_dev
*get_zdev_by_fid(u32
);
216 int zpci_dma_init(void);
217 void zpci_dma_exit(void);
220 int zpci_fmb_enable_device(struct zpci_dev
*);
221 int zpci_fmb_disable_device(struct zpci_dev
*);
224 int zpci_debug_init(void);
225 void zpci_debug_exit(void);
226 void zpci_debug_init_device(struct zpci_dev
*, const char *);
227 void zpci_debug_exit_device(struct zpci_dev
*);
228 void zpci_debug_info(struct zpci_dev
*, struct seq_file
*);
230 /* Error reporting */
231 int zpci_report_error(struct pci_dev
*, struct zpci_report_error_header
*);
235 /* Returns the node based on PCI bus */
236 static inline int __pcibus_to_node(const struct pci_bus
*bus
)
241 static inline const struct cpumask
*
242 cpumask_of_pcibus(const struct pci_bus
*bus
)
244 return cpu_online_mask
;
247 #endif /* CONFIG_NUMA */