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1#ifndef __ASM_S390_PCI_H
2#define __ASM_S390_PCI_H
3
4/* S/390 systems don't have a PCI bus. This file is just here because some stupid .c code
5 * includes it even if CONFIG_PCI is not set.
6 */
7#define PCI_DMA_BUS_IS_PHYS (0)
8
9#endif /* __ASM_S390_PCI_H */
10
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
20void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
21void pci_iounmap(struct pci_dev *, void __iomem *);
22int pci_domain_nr(struct pci_bus *);
23int 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
34struct 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 /* software counters */
48 atomic64_t allocated_pages;
49 atomic64_t mapped_pages;
50 atomic64_t unmapped_pages;
51} __packed __aligned(16);
52
53#define ZPCI_MSI_VEC_BITS 11
54#define ZPCI_MSI_VEC_MAX (1 << ZPCI_MSI_VEC_BITS)
55#define ZPCI_MSI_VEC_MASK (ZPCI_MSI_VEC_MAX - 1)
56
57enum zpci_state {
58 ZPCI_FN_STATE_RESERVED,
59 ZPCI_FN_STATE_STANDBY,
60 ZPCI_FN_STATE_CONFIGURED,
61 ZPCI_FN_STATE_ONLINE,
62 NR_ZPCI_FN_STATES,
63};
64
65struct zpci_bar_struct {
66 struct resource *res; /* bus resource */
67 u32 val; /* bar start & 3 flag bits */
68 u16 map_idx; /* index into bar mapping array */
69 u8 size; /* order 2 exponent */
70};
71
72/* Private data per function */
73struct zpci_dev {
74 struct pci_dev *pdev;
75 struct pci_bus *bus;
76 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
77
78 enum zpci_state state;
79 u32 fid; /* function ID, used by sclp */
80 u32 fh; /* function handle, used by insn's */
81 u16 pchid; /* physical channel ID */
82 u8 pfgid; /* function group ID */
83 u16 domain;
84
85 /* IRQ stuff */
86 u64 msi_addr; /* MSI address */
87 struct airq_iv *aibv; /* adapter interrupt bit vector */
88 unsigned int aisb; /* number of the summary bit */
89
90 /* DMA stuff */
91 unsigned long *dma_table;
92 spinlock_t dma_table_lock;
93 int tlb_refresh;
94
95 spinlock_t iommu_bitmap_lock;
96 unsigned long *iommu_bitmap;
97 unsigned long iommu_size;
98 unsigned long iommu_pages;
99 unsigned int next_bit;
100
101 char res_name[16];
102 struct zpci_bar_struct bars[PCI_BAR_COUNT];
103
104 u64 start_dma; /* Start of available DMA addresses */
105 u64 end_dma; /* End of available DMA addresses */
106 u64 dma_mask; /* DMA address space mask */
107
108 /* Function measurement block */
109 struct zpci_fmb *fmb;
110 u16 fmb_update; /* update interval */
111
112 enum pci_bus_speed max_bus_speed;
113
114 struct dentry *debugfs_dev;
115 struct dentry *debugfs_perf;
116};
117
118static inline bool zdev_enabled(struct zpci_dev *zdev)
119{
120 return (zdev->fh & (1UL << 31)) ? true : false;
121}
122
123/* -----------------------------------------------------------------------------
124 Prototypes
125----------------------------------------------------------------------------- */
126/* Base stuff */
127int zpci_create_device(struct zpci_dev *);
128int zpci_enable_device(struct zpci_dev *);
129int zpci_disable_device(struct zpci_dev *);
130void zpci_stop_device(struct zpci_dev *);
131int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
132int zpci_unregister_ioat(struct zpci_dev *, u8);
133
134/* CLP */
135int clp_scan_pci_devices(void);
136int clp_rescan_pci_devices(void);
137int clp_rescan_pci_devices_simple(void);
138int clp_add_pci_device(u32, u32, int);
139int clp_enable_fh(struct zpci_dev *, u8);
140int clp_disable_fh(struct zpci_dev *);
141
142#ifdef CONFIG_PCI
143/* Error handling and recovery */
144void zpci_event_error(void *);
145void zpci_event_availability(void *);
146void zpci_rescan(void);
147bool zpci_is_enabled(void);
148#else /* CONFIG_PCI */
149static inline void zpci_event_error(void *e) {}
150static inline void zpci_event_availability(void *e) {}
151static inline void zpci_rescan(void) {}
152#endif /* CONFIG_PCI */
153
154#ifdef CONFIG_HOTPLUG_PCI_S390
155int zpci_init_slot(struct zpci_dev *);
156void zpci_exit_slot(struct zpci_dev *);
157#else /* CONFIG_HOTPLUG_PCI_S390 */
158static inline int zpci_init_slot(struct zpci_dev *zdev)
159{
160 return 0;
161}
162static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
163#endif /* CONFIG_HOTPLUG_PCI_S390 */
164
165/* Helpers */
166struct zpci_dev *get_zdev(struct pci_dev *);
167struct zpci_dev *get_zdev_by_fid(u32);
168
169/* sysfs */
170int zpci_sysfs_add_device(struct device *);
171void zpci_sysfs_remove_device(struct device *);
172
173/* DMA */
174int zpci_dma_init(void);
175void zpci_dma_exit(void);
176
177/* FMB */
178int zpci_fmb_enable_device(struct zpci_dev *);
179int zpci_fmb_disable_device(struct zpci_dev *);
180
181/* Debug */
182int zpci_debug_init(void);
183void zpci_debug_exit(void);
184void zpci_debug_init_device(struct zpci_dev *);
185void zpci_debug_exit_device(struct zpci_dev *);
186void zpci_debug_info(struct zpci_dev *, struct seq_file *);
187
188#endif