1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_S390_PCI_H
3 #define __ASM_S390_PCI_H
4
5 /* must be set before including pci_clp.h */
6 #define PCI_BAR_COUNT 6
7
8 #include <linux/pci.h>
9 #include <linux/mutex.h>
10 #include <linux/iommu.h>
11 #include <asm-generic/pci.h>
12 #include <asm/pci_clp.h>
13 #include <asm/pci_debug.h>
14 #include <asm/sclp.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 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
36
37 struct zpci_fmb_fmt0 {
38 u64 dma_rbytes;
39 u64 dma_wbytes;
40 };
41
42 struct zpci_fmb_fmt1 {
43 u64 rx_bytes;
44 u64 rx_packets;
45 u64 tx_bytes;
46 u64 tx_packets;
47 };
48
49 struct zpci_fmb_fmt2 {
50 u64 consumed_work_units;
51 u64 max_work_units;
52 };
53
54 struct zpci_fmb_fmt3 {
55 u64 tx_bytes;
56 };
57
58 struct zpci_fmb {
59 u32 format : 8;
60 u32 fmt_ind : 24;
61 u32 samples;
62 u64 last_update;
63 /* common counters */
64 u64 ld_ops;
65 u64 st_ops;
66 u64 stb_ops;
67 u64 rpcit_ops;
68 /* format specific counters */
69 union {
70 struct zpci_fmb_fmt0 fmt0;
71 struct zpci_fmb_fmt1 fmt1;
72 struct zpci_fmb_fmt2 fmt2;
73 struct zpci_fmb_fmt3 fmt3;
74 };
75 } __packed __aligned(128);
76
77 enum zpci_state {
78 ZPCI_FN_STATE_STANDBY = 0,
79 ZPCI_FN_STATE_CONFIGURED = 1,
80 ZPCI_FN_STATE_RESERVED = 2,
81 ZPCI_FN_STATE_ONLINE = 3,
82 };
83
84 struct zpci_bar_struct {
85 struct resource *res; /* bus resource */
86 u32 val; /* bar start & 3 flag bits */
87 u16 map_idx; /* index into bar mapping array */
88 u8 size; /* order 2 exponent */
89 };
90
91 struct s390_domain;
92
93 /* Private data per function */
94 struct zpci_dev {
95 struct pci_bus *bus;
96 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
97
98 enum zpci_state state;
99 u32 fid; /* function ID, used by sclp */
100 u32 fh; /* function handle, used by insn's */
101 u16 vfn; /* virtual function number */
102 u16 pchid; /* physical channel ID */
103 u8 pfgid; /* function group ID */
104 u8 pft; /* pci function type */
105 u16 domain;
106
107 struct mutex lock;
108 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
109 u32 uid; /* user defined id */
110 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
111
112 /* IRQ stuff */
113 u64 msi_addr; /* MSI address */
114 unsigned int max_msi; /* maximum number of MSI's */
115 struct airq_iv *aibv; /* adapter interrupt bit vector */
116 unsigned long aisb; /* number of the summary bit */
117
118 /* DMA stuff */
119 unsigned long *dma_table;
120 spinlock_t dma_table_lock;
121 int tlb_refresh;
122
123 spinlock_t iommu_bitmap_lock;
124 unsigned long *iommu_bitmap;
125 unsigned long *lazy_bitmap;
126 unsigned long iommu_size;
127 unsigned long iommu_pages;
128 unsigned int next_bit;
129
130 struct iommu_device iommu_dev; /* IOMMU core handle */
131
132 char res_name[16];
133 struct zpci_bar_struct bars[PCI_BAR_COUNT];
134
135 u64 start_dma; /* Start of available DMA addresses */
136 u64 end_dma; /* End of available DMA addresses */
137 u64 dma_mask; /* DMA address space mask */
138
139 /* Function measurement block */
140 struct zpci_fmb *fmb;
141 u16 fmb_update; /* update interval */
142 u16 fmb_length;
143 /* software counters */
144 atomic64_t allocated_pages;
145 atomic64_t mapped_pages;
146 atomic64_t unmapped_pages;
147
148 enum pci_bus_speed max_bus_speed;
149
150 struct dentry *debugfs_dev;
151 struct dentry *debugfs_perf;
152
153 struct s390_domain *s390_domain; /* s390 IOMMU domain data */
154 };
155
zdev_enabled(struct zpci_dev * zdev)156 static inline bool zdev_enabled(struct zpci_dev *zdev)
157 {
158 return (zdev->fh & (1UL << 31)) ? true : false;
159 }
160
161 extern const struct attribute_group *zpci_attr_groups[];
162
163 /* -----------------------------------------------------------------------------
164 Prototypes
165 ----------------------------------------------------------------------------- */
166 /* Base stuff */
167 int zpci_create_device(struct zpci_dev *);
168 void zpci_remove_device(struct zpci_dev *zdev);
169 int zpci_enable_device(struct zpci_dev *);
170 int zpci_disable_device(struct zpci_dev *);
171 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
172 int zpci_unregister_ioat(struct zpci_dev *, u8);
173 void zpci_remove_reserved_devices(void);
174
175 /* CLP */
176 int clp_scan_pci_devices(void);
177 int clp_rescan_pci_devices(void);
178 int clp_rescan_pci_devices_simple(void);
179 int clp_add_pci_device(u32, u32, int);
180 int clp_enable_fh(struct zpci_dev *, u8);
181 int clp_disable_fh(struct zpci_dev *);
182 int clp_get_state(u32 fid, enum zpci_state *state);
183
184 /* IOMMU Interface */
185 int zpci_init_iommu(struct zpci_dev *zdev);
186 void zpci_destroy_iommu(struct zpci_dev *zdev);
187
188 #ifdef CONFIG_PCI
189 /* Error handling and recovery */
190 void zpci_event_error(void *);
191 void zpci_event_availability(void *);
192 void zpci_rescan(void);
193 bool zpci_is_enabled(void);
194 #else /* CONFIG_PCI */
zpci_event_error(void * e)195 static inline void zpci_event_error(void *e) {}
zpci_event_availability(void * e)196 static inline void zpci_event_availability(void *e) {}
zpci_rescan(void)197 static inline void zpci_rescan(void) {}
198 #endif /* CONFIG_PCI */
199
200 #ifdef CONFIG_HOTPLUG_PCI_S390
201 int zpci_init_slot(struct zpci_dev *);
202 void zpci_exit_slot(struct zpci_dev *);
203 #else /* CONFIG_HOTPLUG_PCI_S390 */
zpci_init_slot(struct zpci_dev * zdev)204 static inline int zpci_init_slot(struct zpci_dev *zdev)
205 {
206 return 0;
207 }
zpci_exit_slot(struct zpci_dev * zdev)208 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
209 #endif /* CONFIG_HOTPLUG_PCI_S390 */
210
211 /* Helpers */
to_zpci(struct pci_dev * pdev)212 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
213 {
214 return pdev->sysdata;
215 }
216
217 struct zpci_dev *get_zdev_by_fid(u32);
218
219 /* DMA */
220 int zpci_dma_init(void);
221 void zpci_dma_exit(void);
222
223 /* FMB */
224 int zpci_fmb_enable_device(struct zpci_dev *);
225 int zpci_fmb_disable_device(struct zpci_dev *);
226
227 /* Debug */
228 int zpci_debug_init(void);
229 void zpci_debug_exit(void);
230 void zpci_debug_init_device(struct zpci_dev *, const char *);
231 void zpci_debug_exit_device(struct zpci_dev *);
232 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
233
234 /* Error reporting */
235 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
236
237 #ifdef CONFIG_NUMA
238
239 /* Returns the node based on PCI bus */
__pcibus_to_node(const struct pci_bus * bus)240 static inline int __pcibus_to_node(const struct pci_bus *bus)
241 {
242 return NUMA_NO_NODE;
243 }
244
245 static inline const struct cpumask *
cpumask_of_pcibus(const struct pci_bus * bus)246 cpumask_of_pcibus(const struct pci_bus *bus)
247 {
248 return cpu_online_mask;
249 }
250
251 #endif /* CONFIG_NUMA */
252
253 #endif
254
