1
2#ifndef __ASM_S390_PCI_H
3#define __ASM_S390_PCI_H
4
5
6#define PCI_DMA_BUS_IS_PHYS (0)
7
8#define PCI_BAR_COUNT 6
9
10#include <linux/pci.h>
11#include <linux/mutex.h>
12#include <linux/iommu.h>
13#include <asm-generic/pci.h>
14#include <asm/pci_clp.h>
15#include <asm/pci_debug.h>
16#include <asm/sclp.h>
17
18#define PCIBIOS_MIN_IO 0x1000
19#define PCIBIOS_MIN_MEM 0x10000000
20
21#define pcibios_assign_all_busses() (0)
22
23void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
24void pci_iounmap(struct pci_dev *, void __iomem *);
25int pci_domain_nr(struct pci_bus *);
26int pci_proc_domain(struct pci_bus *);
27
28#define ZPCI_BUS_NR 0
29#define ZPCI_DEVFN 0
30
31
32#define ZPCI_FC_FN_ENABLED 0x80
33#define ZPCI_FC_ERROR 0x40
34#define ZPCI_FC_BLOCKED 0x20
35#define ZPCI_FC_DMA_ENABLED 0x10
36
37#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
38
39struct zpci_fmb_fmt0 {
40 u64 dma_rbytes;
41 u64 dma_wbytes;
42};
43
44struct zpci_fmb_fmt1 {
45 u64 rx_bytes;
46 u64 rx_packets;
47 u64 tx_bytes;
48 u64 tx_packets;
49};
50
51struct zpci_fmb_fmt2 {
52 u64 consumed_work_units;
53 u64 max_work_units;
54};
55
56struct zpci_fmb {
57 u32 format : 8;
58 u32 fmt_ind : 24;
59 u32 samples;
60 u64 last_update;
61
62 u64 ld_ops;
63 u64 st_ops;
64 u64 stb_ops;
65 u64 rpcit_ops;
66
67 union {
68 struct zpci_fmb_fmt0 fmt0;
69 struct zpci_fmb_fmt1 fmt1;
70 struct zpci_fmb_fmt2 fmt2;
71 };
72} __packed __aligned(128);
73
74enum zpci_state {
75 ZPCI_FN_STATE_STANDBY = 0,
76 ZPCI_FN_STATE_CONFIGURED = 1,
77 ZPCI_FN_STATE_RESERVED = 2,
78 ZPCI_FN_STATE_ONLINE = 3,
79};
80
81struct zpci_bar_struct {
82 struct resource *res;
83 u32 val;
84 u16 map_idx;
85 u8 size;
86};
87
88struct s390_domain;
89
90
91struct zpci_dev {
92 struct pci_bus *bus;
93 struct list_head entry;
94
95 enum zpci_state state;
96 u32 fid;
97 u32 fh;
98 u16 vfn;
99 u16 pchid;
100 u8 pfgid;
101 u8 pft;
102 u16 domain;
103
104 struct mutex lock;
105 u8 pfip[CLP_PFIP_NR_SEGMENTS];
106 u32 uid;
107 u8 util_str[CLP_UTIL_STR_LEN];
108
109
110 u64 msi_addr;
111 unsigned int max_msi;
112 struct airq_iv *aibv;
113 unsigned long aisb;
114
115
116 unsigned long *dma_table;
117 spinlock_t dma_table_lock;
118 int tlb_refresh;
119
120 spinlock_t iommu_bitmap_lock;
121 unsigned long *iommu_bitmap;
122 unsigned long *lazy_bitmap;
123 unsigned long iommu_size;
124 unsigned long iommu_pages;
125 unsigned int next_bit;
126
127 struct iommu_device iommu_dev;
128
129 char res_name[16];
130 struct zpci_bar_struct bars[PCI_BAR_COUNT];
131
132 u64 start_dma;
133 u64 end_dma;
134 u64 dma_mask;
135
136
137 struct zpci_fmb *fmb;
138 u16 fmb_update;
139 u16 fmb_length;
140
141 atomic64_t allocated_pages;
142 atomic64_t mapped_pages;
143 atomic64_t unmapped_pages;
144
145 enum pci_bus_speed max_bus_speed;
146
147 struct dentry *debugfs_dev;
148 struct dentry *debugfs_perf;
149
150 struct s390_domain *s390_domain;
151};
152
153static inline bool zdev_enabled(struct zpci_dev *zdev)
154{
155 return (zdev->fh & (1UL << 31)) ? true : false;
156}
157
158extern const struct attribute_group *zpci_attr_groups[];
159
160
161
162
163
164int zpci_create_device(struct zpci_dev *);
165void zpci_remove_device(struct zpci_dev *zdev);
166int zpci_enable_device(struct zpci_dev *);
167int zpci_disable_device(struct zpci_dev *);
168int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
169int zpci_unregister_ioat(struct zpci_dev *, u8);
170void zpci_remove_reserved_devices(void);
171
172
173int clp_scan_pci_devices(void);
174int clp_rescan_pci_devices(void);
175int clp_rescan_pci_devices_simple(void);
176int clp_add_pci_device(u32, u32, int);
177int clp_enable_fh(struct zpci_dev *, u8);
178int clp_disable_fh(struct zpci_dev *);
179int clp_get_state(u32 fid, enum zpci_state *state);
180
181
182int zpci_init_iommu(struct zpci_dev *zdev);
183void zpci_destroy_iommu(struct zpci_dev *zdev);
184
185#ifdef CONFIG_PCI
186
187void zpci_event_error(void *);
188void zpci_event_availability(void *);
189void zpci_rescan(void);
190bool zpci_is_enabled(void);
191#else
192static inline void zpci_event_error(void *e) {}
193static inline void zpci_event_availability(void *e) {}
194static inline void zpci_rescan(void) {}
195#endif
196
197#ifdef CONFIG_HOTPLUG_PCI_S390
198int zpci_init_slot(struct zpci_dev *);
199void zpci_exit_slot(struct zpci_dev *);
200#else
201static inline int zpci_init_slot(struct zpci_dev *zdev)
202{
203 return 0;
204}
205static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
206#endif
207
208
209static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
210{
211 return pdev->sysdata;
212}
213
214struct zpci_dev *get_zdev_by_fid(u32);
215
216
217int zpci_dma_init(void);
218void zpci_dma_exit(void);
219
220
221int zpci_fmb_enable_device(struct zpci_dev *);
222int zpci_fmb_disable_device(struct zpci_dev *);
223
224
225int zpci_debug_init(void);
226void zpci_debug_exit(void);
227void zpci_debug_init_device(struct zpci_dev *, const char *);
228void zpci_debug_exit_device(struct zpci_dev *);
229void zpci_debug_info(struct zpci_dev *, struct seq_file *);
230
231
232int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
233
234#ifdef CONFIG_NUMA
235
236
237static inline int __pcibus_to_node(const struct pci_bus *bus)
238{
239 return NUMA_NO_NODE;
240}
241
242static inline const struct cpumask *
243cpumask_of_pcibus(const struct pci_bus *bus)
244{
245 return cpu_online_mask;
246}
247
248#endif
249
250#endif
251