1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_S390_PCI_H
3 #define __ASM_S390_PCI_H
6 #include <linux/mutex.h>
7 #include <linux/iommu.h>
8 #include <linux/pci_hotplug.h>
9 #include <asm/pci_clp.h>
10 #include <asm/pci_debug.h>
11 #include <asm/pci_insn.h>
14 #define PCIBIOS_MIN_IO 0x1000
15 #define PCIBIOS_MIN_MEM 0x10000000
17 #define pcibios_assign_all_busses() (0)
19 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
20 void pci_iounmap(struct pci_dev *, void __iomem *);
21 int pci_domain_nr(struct pci_bus *);
22 int pci_proc_domain(struct pci_bus *);
24 #define ZPCI_BUS_NR 0 /* default bus number */
26 #define ZPCI_NR_DMA_SPACES 1
27 #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
28 #define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16)
31 #if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
32 # error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
36 /* PCI Function Controls */
37 #define ZPCI_FC_FN_ENABLED 0x80
38 #define ZPCI_FC_ERROR 0x40
39 #define ZPCI_FC_BLOCKED 0x20
40 #define ZPCI_FC_DMA_ENABLED 0x10
42 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
44 struct zpci_fmb_fmt0 {
49 struct zpci_fmb_fmt1 {
56 struct zpci_fmb_fmt2 {
57 u64 consumed_work_units;
61 struct zpci_fmb_fmt3 {
75 /* format specific counters */
77 struct zpci_fmb_fmt0 fmt0;
78 struct zpci_fmb_fmt1 fmt1;
79 struct zpci_fmb_fmt2 fmt2;
80 struct zpci_fmb_fmt3 fmt3;
82 } __packed __aligned(128);
85 ZPCI_FN_STATE_STANDBY = 0,
86 ZPCI_FN_STATE_CONFIGURED = 1,
87 ZPCI_FN_STATE_RESERVED = 2,
90 struct zpci_bar_struct {
91 struct resource *res; /* bus resource */
94 u32 val; /* bar start & 3 flag bits */
95 u16 map_idx; /* index into bar mapping array */
96 u8 size; /* order 2 exponent */
102 #define ZPCI_FUNCTIONS_PER_BUS 256
106 struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS];
107 struct list_head resources;
108 struct list_head bus_next;
109 struct resource bus_resource;
113 enum pci_bus_speed max_bus_speed;
116 /* Private data per function */
118 struct zpci_bus *zbus;
119 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
120 struct list_head iommu_list;
123 struct hotplug_slot hotplug_slot;
125 enum zpci_state state;
126 u32 fid; /* function ID, used by sclp */
127 u32 fh; /* function handle, used by insn's */
128 u32 gisa; /* GISA designation for passthrough */
129 u16 vfn; /* virtual function number */
130 u16 pchid; /* physical channel ID */
131 u16 maxstbl; /* Maximum store block size */
132 u8 pfgid; /* function group ID */
133 u8 pft; /* pci function type */
135 u8 dtsm; /* Supported DT mask */
136 u8 rid_available : 1;
138 u8 has_resources : 1;
140 u8 util_str_avail : 1;
141 u8 irqs_registered : 1;
143 unsigned int devfn; /* DEVFN part of the RID*/
146 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
147 u32 uid; /* user defined id */
148 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
151 u64 msi_addr; /* MSI address */
152 unsigned int max_msi; /* maximum number of MSI's */
153 unsigned int msi_first_bit;
154 unsigned int msi_nr_irqs;
155 struct airq_iv *aibv; /* adapter interrupt bit vector */
156 unsigned long aisb; /* number of the summary bit */
159 unsigned long *dma_table;
162 struct iommu_device iommu_dev; /* IOMMU core handle */
166 struct zpci_bar_struct bars[PCI_STD_NUM_BARS];
168 u64 start_dma; /* Start of available DMA addresses */
169 u64 end_dma; /* End of available DMA addresses */
170 u64 dma_mask; /* DMA address space mask */
172 /* Function measurement block */
173 struct zpci_fmb *fmb;
174 u16 fmb_update; /* update interval */
178 enum pci_bus_speed max_bus_speed;
180 struct dentry *debugfs_dev;
182 /* IOMMU and passthrough */
183 struct s390_domain *s390_domain; /* s390 IOMMU domain data */
184 struct kvm_zdev *kzdev;
185 struct mutex kzdev_lock;
188 static inline bool zdev_enabled(struct zpci_dev *zdev)
190 return (zdev->fh & (1UL << 31)) ? true : false;
193 extern const struct attribute_group *zpci_attr_groups[];
194 extern unsigned int s390_pci_force_floating __initdata;
195 extern unsigned int s390_pci_no_rid;
197 extern union zpci_sic_iib *zpci_aipb;
198 extern struct airq_iv *zpci_aif_sbv;
200 /* -----------------------------------------------------------------------------
202 ----------------------------------------------------------------------------- */
204 struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
205 int zpci_enable_device(struct zpci_dev *);
206 int zpci_disable_device(struct zpci_dev *);
207 int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
208 int zpci_deconfigure_device(struct zpci_dev *zdev);
209 void zpci_device_reserved(struct zpci_dev *zdev);
210 bool zpci_is_device_configured(struct zpci_dev *zdev);
212 int zpci_hot_reset_device(struct zpci_dev *zdev);
213 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64, u8 *);
214 int zpci_unregister_ioat(struct zpci_dev *, u8);
215 void zpci_remove_reserved_devices(void);
216 void zpci_update_fh(struct zpci_dev *zdev, u32 fh);
219 int clp_setup_writeback_mio(void);
220 int clp_scan_pci_devices(void);
221 int clp_query_pci_fn(struct zpci_dev *zdev);
222 int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as);
223 int clp_disable_fh(struct zpci_dev *zdev, u32 *fh);
224 int clp_get_state(u32 fid, enum zpci_state *state);
225 int clp_refresh_fh(u32 fid, u32 *fh);
228 void update_uid_checking(bool new);
230 /* IOMMU Interface */
231 int zpci_init_iommu(struct zpci_dev *zdev);
232 void zpci_destroy_iommu(struct zpci_dev *zdev);
235 static inline bool zpci_use_mio(struct zpci_dev *zdev)
237 return static_branch_likely(&have_mio) && zdev->mio_capable;
240 /* Error handling and recovery */
241 void zpci_event_error(void *);
242 void zpci_event_availability(void *);
243 bool zpci_is_enabled(void);
244 #else /* CONFIG_PCI */
245 static inline void zpci_event_error(void *e) {}
246 static inline void zpci_event_availability(void *e) {}
247 #endif /* CONFIG_PCI */
249 #ifdef CONFIG_HOTPLUG_PCI_S390
250 int zpci_init_slot(struct zpci_dev *);
251 void zpci_exit_slot(struct zpci_dev *);
252 #else /* CONFIG_HOTPLUG_PCI_S390 */
253 static inline int zpci_init_slot(struct zpci_dev *zdev)
257 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
258 #endif /* CONFIG_HOTPLUG_PCI_S390 */
261 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
263 struct zpci_bus *zbus = pdev->sysdata;
265 return zbus->function[pdev->devfn];
268 static inline struct zpci_dev *to_zpci_dev(struct device *dev)
270 return to_zpci(to_pci_dev(dev));
273 struct zpci_dev *get_zdev_by_fid(u32);
276 int zpci_dma_init(void);
277 void zpci_dma_exit(void);
278 int zpci_dma_init_device(struct zpci_dev *zdev);
279 int zpci_dma_exit_device(struct zpci_dev *zdev);
282 int __init zpci_irq_init(void);
283 void __init zpci_irq_exit(void);
286 int zpci_fmb_enable_device(struct zpci_dev *);
287 int zpci_fmb_disable_device(struct zpci_dev *);
290 int zpci_debug_init(void);
291 void zpci_debug_exit(void);
292 void zpci_debug_init_device(struct zpci_dev *, const char *);
293 void zpci_debug_exit_device(struct zpci_dev *);
296 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
297 int zpci_clear_error_state(struct zpci_dev *zdev);
298 int zpci_reset_load_store_blocked(struct zpci_dev *zdev);
302 /* Returns the node based on PCI bus */
303 static inline int __pcibus_to_node(const struct pci_bus *bus)
308 static inline const struct cpumask *
309 cpumask_of_pcibus(const struct pci_bus *bus)
311 return cpu_online_mask;
314 #endif /* CONFIG_NUMA */