1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_S390_PCI_H
3 #define __ASM_S390_PCI_H
5 /* must be set before including pci_clp.h */
6 #define PCI_BAR_COUNT 6
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>
16 #define PCIBIOS_MIN_IO 0x1000
17 #define PCIBIOS_MIN_MEM 0x10000000
19 #define pcibios_assign_all_busses() (0)
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 *);
26 #define ZPCI_BUS_NR 0 /* default bus number */
27 #define ZPCI_DEVFN 0 /* default device number */
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
35 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
37 struct zpci_fmb_fmt0 {
42 struct zpci_fmb_fmt1 {
49 struct zpci_fmb_fmt2 {
50 u64 consumed_work_units;
64 /* format specific counters */
66 struct zpci_fmb_fmt0 fmt0;
67 struct zpci_fmb_fmt1 fmt1;
68 struct zpci_fmb_fmt2 fmt2;
70 } __packed __aligned(128);
73 ZPCI_FN_STATE_STANDBY = 0,
74 ZPCI_FN_STATE_CONFIGURED = 1,
75 ZPCI_FN_STATE_RESERVED = 2,
76 ZPCI_FN_STATE_ONLINE = 3,
79 struct zpci_bar_struct {
80 struct resource *res; /* bus resource */
81 u32 val; /* bar start & 3 flag bits */
82 u16 map_idx; /* index into bar mapping array */
83 u8 size; /* order 2 exponent */
88 /* Private data per function */
91 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
93 enum zpci_state state;
94 u32 fid; /* function ID, used by sclp */
95 u32 fh; /* function handle, used by insn's */
96 u16 vfn; /* virtual function number */
97 u16 pchid; /* physical channel ID */
98 u8 pfgid; /* function group ID */
99 u8 pft; /* pci function type */
103 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
104 u32 uid; /* user defined id */
105 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
108 u64 msi_addr; /* MSI address */
109 unsigned int max_msi; /* maximum number of MSI's */
110 struct airq_iv *aibv; /* adapter interrupt bit vector */
111 unsigned long aisb; /* number of the summary bit */
114 unsigned long *dma_table;
115 spinlock_t dma_table_lock;
118 spinlock_t iommu_bitmap_lock;
119 unsigned long *iommu_bitmap;
120 unsigned long *lazy_bitmap;
121 unsigned long iommu_size;
122 unsigned long iommu_pages;
123 unsigned int next_bit;
125 struct iommu_device iommu_dev; /* IOMMU core handle */
128 struct zpci_bar_struct bars[PCI_BAR_COUNT];
130 u64 start_dma; /* Start of available DMA addresses */
131 u64 end_dma; /* End of available DMA addresses */
132 u64 dma_mask; /* DMA address space mask */
134 /* Function measurement block */
135 struct zpci_fmb *fmb;
136 u16 fmb_update; /* update interval */
138 /* software counters */
139 atomic64_t allocated_pages;
140 atomic64_t mapped_pages;
141 atomic64_t unmapped_pages;
143 enum pci_bus_speed max_bus_speed;
145 struct dentry *debugfs_dev;
146 struct dentry *debugfs_perf;
148 struct s390_domain *s390_domain; /* s390 IOMMU domain data */
151 static inline bool zdev_enabled(struct zpci_dev *zdev)
153 return (zdev->fh & (1UL << 31)) ? true : false;
156 extern const struct attribute_group *zpci_attr_groups[];
158 /* -----------------------------------------------------------------------------
160 ----------------------------------------------------------------------------- */
162 int zpci_create_device(struct zpci_dev *);
163 void zpci_remove_device(struct zpci_dev *zdev);
164 int zpci_enable_device(struct zpci_dev *);
165 int zpci_disable_device(struct zpci_dev *);
166 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
167 int zpci_unregister_ioat(struct zpci_dev *, u8);
168 void zpci_remove_reserved_devices(void);
171 int clp_scan_pci_devices(void);
172 int clp_rescan_pci_devices(void);
173 int clp_rescan_pci_devices_simple(void);
174 int clp_add_pci_device(u32, u32, int);
175 int clp_enable_fh(struct zpci_dev *, u8);
176 int clp_disable_fh(struct zpci_dev *);
177 int clp_get_state(u32 fid, enum zpci_state *state);
179 /* IOMMU Interface */
180 int zpci_init_iommu(struct zpci_dev *zdev);
181 void zpci_destroy_iommu(struct zpci_dev *zdev);
184 /* Error handling and recovery */
185 void zpci_event_error(void *);
186 void zpci_event_availability(void *);
187 void zpci_rescan(void);
188 bool zpci_is_enabled(void);
189 #else /* CONFIG_PCI */
190 static inline void zpci_event_error(void *e) {}
191 static inline void zpci_event_availability(void *e) {}
192 static inline void zpci_rescan(void) {}
193 #endif /* CONFIG_PCI */
195 #ifdef CONFIG_HOTPLUG_PCI_S390
196 int zpci_init_slot(struct zpci_dev *);
197 void zpci_exit_slot(struct zpci_dev *);
198 #else /* CONFIG_HOTPLUG_PCI_S390 */
199 static inline int zpci_init_slot(struct zpci_dev *zdev)
203 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
204 #endif /* CONFIG_HOTPLUG_PCI_S390 */
207 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
209 return pdev->sysdata;
212 struct zpci_dev *get_zdev_by_fid(u32);
215 int zpci_dma_init(void);
216 void zpci_dma_exit(void);
219 int zpci_fmb_enable_device(struct zpci_dev *);
220 int zpci_fmb_disable_device(struct zpci_dev *);
223 int zpci_debug_init(void);
224 void zpci_debug_exit(void);
225 void zpci_debug_init_device(struct zpci_dev *, const char *);
226 void zpci_debug_exit_device(struct zpci_dev *);
227 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
229 /* Error reporting */
230 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
234 /* Returns the node based on PCI bus */
235 static inline int __pcibus_to_node(const struct pci_bus *bus)
240 static inline const struct cpumask *
241 cpumask_of_pcibus(const struct pci_bus *bus)
243 return cpu_online_mask;
246 #endif /* CONFIG_NUMA */