1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_POWERPC_PCI_BRIDGE_H
3 #define _ASM_POWERPC_PCI_BRIDGE_H
4 #ifdef __KERNEL__
5 /*
6 */
7 #include <linux/pci.h>
8 #include <linux/list.h>
9 #include <linux/ioport.h>
10 #include <linux/numa.h>
11 #include <linux/iommu.h>
12
13 struct device_node;
14
15 /*
16 * PCI controller operations
17 */
18 struct pci_controller_ops {
19 void (*dma_dev_setup)(struct pci_dev *pdev);
20 void (*dma_bus_setup)(struct pci_bus *bus);
21 bool (*iommu_bypass_supported)(struct pci_dev *pdev,
22 u64 mask);
23
24 int (*probe_mode)(struct pci_bus *bus);
25
26 /* Called when pci_enable_device() is called. Returns true to
27 * allow assignment/enabling of the device. */
28 bool (*enable_device_hook)(struct pci_dev *pdev);
29
30 void (*disable_device)(struct pci_dev *pdev);
31
32 void (*release_device)(struct pci_dev *pdev);
33
34 /* Called during PCI resource reassignment */
35 resource_size_t (*window_alignment)(struct pci_bus *bus,
36 unsigned long type);
37 void (*setup_bridge)(struct pci_bus *bus,
38 unsigned long type);
39 void (*reset_secondary_bus)(struct pci_dev *pdev);
40
41 #ifdef CONFIG_PCI_MSI
42 int (*setup_msi_irqs)(struct pci_dev *pdev,
43 int nvec, int type);
44 void (*teardown_msi_irqs)(struct pci_dev *pdev);
45 #endif
46
47 void (*shutdown)(struct pci_controller *hose);
48
49 struct iommu_group *(*device_group)(struct pci_controller *hose,
50 struct pci_dev *pdev);
51 };
52
53 /*
54 * Structure of a PCI controller (host bridge)
55 */
56 struct pci_controller {
57 struct pci_bus *bus;
58 char is_dynamic;
59 #ifdef CONFIG_PPC64
60 int node;
61 #endif
62 struct device_node *dn;
63 struct list_head list_node;
64 struct device *parent;
65
66 int first_busno;
67 int last_busno;
68 int self_busno;
69 struct resource busn;
70
71 void __iomem *io_base_virt;
72 #ifdef CONFIG_PPC64
73 void __iomem *io_base_alloc;
74 #endif
75 resource_size_t io_base_phys;
76 resource_size_t pci_io_size;
77
78 /* Some machines have a special region to forward the ISA
79 * "memory" cycles such as VGA memory regions. Left to 0
80 * if unsupported
81 */
82 resource_size_t isa_mem_phys;
83 resource_size_t isa_mem_size;
84
85 struct pci_controller_ops controller_ops;
86 struct pci_ops *ops;
87 unsigned int __iomem *cfg_addr;
88 void __iomem *cfg_data;
89
90 /*
91 * Used for variants of PCI indirect handling and possible quirks:
92 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
93 * EXT_REG - provides access to PCI-e extended registers
94 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS
95 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
96 * to determine which bus number to match on when generating type0
97 * config cycles
98 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
99 * hanging if we don't have link and try to do config cycles to
100 * anything but the PHB. Only allow talking to the PHB if this is
101 * set.
102 * BIG_ENDIAN - cfg_addr is a big endian register
103 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
104 * the PLB4. Effectively disable MRM commands by setting this.
105 * FSL_CFG_REG_LINK - Freescale controller version in which the PCIe
106 * link status is in a RC PCIe cfg register (vs being a SoC register)
107 */
108 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
109 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002
110 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
111 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
112 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010
113 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020
114 #define PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK 0x00000040
115 u32 indirect_type;
116 /* Currently, we limit ourselves to 1 IO range and 3 mem
117 * ranges since the common pci_bus structure can't handle more
118 */
119 struct resource io_resource;
120 struct resource mem_resources[3];
121 resource_size_t mem_offset[3];
122 int global_number; /* PCI domain number */
123
124 resource_size_t dma_window_base_cur;
125 resource_size_t dma_window_size;
126
127 #ifdef CONFIG_PPC64
128 unsigned long buid;
129 struct pci_dn *pci_data;
130 #endif /* CONFIG_PPC64 */
131
132 void *private_data;
133
134 /* IRQ domain hierarchy */
135 struct irq_domain *dev_domain;
136 struct irq_domain *msi_domain;
137 struct fwnode_handle *fwnode;
138
139 /* iommu_ops support */
140 struct iommu_device iommu;
141 };
142
143 /* These are used for config access before all the PCI probing
144 has been done. */
145 extern int early_read_config_byte(struct pci_controller *hose, int bus,
146 int dev_fn, int where, u8 *val);
147 extern int early_read_config_word(struct pci_controller *hose, int bus,
148 int dev_fn, int where, u16 *val);
149 extern int early_read_config_dword(struct pci_controller *hose, int bus,
150 int dev_fn, int where, u32 *val);
151 extern int early_write_config_byte(struct pci_controller *hose, int bus,
152 int dev_fn, int where, u8 val);
153 extern int early_write_config_word(struct pci_controller *hose, int bus,
154 int dev_fn, int where, u16 val);
155 extern int early_write_config_dword(struct pci_controller *hose, int bus,
156 int dev_fn, int where, u32 val);
157
158 extern int early_find_capability(struct pci_controller *hose, int bus,
159 int dev_fn, int cap);
160
161 extern void setup_indirect_pci(struct pci_controller* hose,
162 resource_size_t cfg_addr,
163 resource_size_t cfg_data, u32 flags);
164
165 extern int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
166 int offset, int len, u32 *val);
167
168 extern int __indirect_read_config(struct pci_controller *hose,
169 unsigned char bus_number, unsigned int devfn,
170 int offset, int len, u32 *val);
171
172 extern int indirect_write_config(struct pci_bus *bus, unsigned int devfn,
173 int offset, int len, u32 val);
174
175 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
176 {
177 return bus->sysdata;
178 }
179
180 #ifdef CONFIG_PPC_PMAC
181 extern int pci_device_from_OF_node(struct device_node *node,
182 u8 *bus, u8 *devfn);
183 #endif
184 #ifndef CONFIG_PPC64
185
186 #ifdef CONFIG_PPC_PCI_OF_BUS_MAP
187 extern void pci_create_OF_bus_map(void);
188 #else
189 static inline void pci_create_OF_bus_map(void) {}
190 #endif
191
192 #else /* CONFIG_PPC64 */
193
194 /*
195 * PCI stuff, for nodes representing PCI devices, pointed to
196 * by device_node->data.
197 */
198 struct iommu_table;
199
200 struct pci_dn {
201 int flags;
202 #define PCI_DN_FLAG_IOV_VF 0x01
203 #define PCI_DN_FLAG_DEAD 0x02 /* Device has been hot-removed */
204
205 int busno; /* pci bus number */
206 int devfn; /* pci device and function number */
207 int vendor_id; /* Vendor ID */
208 int device_id; /* Device ID */
209 int class_code; /* Device class code */
210
211 struct pci_dn *parent;
212 struct pci_controller *phb; /* for pci devices */
213 struct iommu_table_group *table_group; /* for phb's or bridges */
214
215 int pci_ext_config_space; /* for pci devices */
216 #ifdef CONFIG_EEH
217 struct eeh_dev *edev; /* eeh device */
218 #endif
219 #define IODA_INVALID_PE 0xFFFFFFFF
220 unsigned int pe_number;
221 #ifdef CONFIG_PCI_IOV
222 u16 vfs_expanded; /* number of VFs IOV BAR expanded */
223 u16 num_vfs; /* number of VFs enabled*/
224 unsigned int *pe_num_map; /* PE# for the first VF PE or array */
225 bool m64_single_mode; /* Use M64 BAR in Single Mode */
226 #define IODA_INVALID_M64 (-1)
227 int (*m64_map)[PCI_SRIOV_NUM_BARS]; /* Only used on powernv */
228 int last_allow_rc; /* Only used on pseries */
229 #endif /* CONFIG_PCI_IOV */
230 int mps; /* Maximum Payload Size */
231 struct list_head child_list;
232 struct list_head list;
233 struct resource holes[PCI_SRIOV_NUM_BARS];
234 };
235
236 /* Get the pointer to a device_node's pci_dn */
237 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
238
239 extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus,
240 int devfn);
241 extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev);
242 extern struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
243 struct device_node *dn);
244 extern void pci_remove_device_node_info(struct device_node *dn);
245
246 #ifdef CONFIG_PCI_IOV
247 struct pci_dn *add_sriov_vf_pdns(struct pci_dev *pdev);
248 void remove_sriov_vf_pdns(struct pci_dev *pdev);
249 #endif
250
251 #if defined(CONFIG_EEH)
252 static inline struct eeh_dev *pdn_to_eeh_dev(struct pci_dn *pdn)
253 {
254 return pdn ? pdn->edev : NULL;
255 }
256 #else
257 #define pdn_to_eeh_dev(x) (NULL)
258 #endif
259
260 /** Find the bus corresponding to the indicated device node */
261 extern struct pci_bus *pci_find_bus_by_node(struct device_node *dn);
262
263 /** Remove all of the PCI devices under this bus */
264 extern void pci_hp_remove_devices(struct pci_bus *bus);
265
266 /** Discover new pci devices under this bus, and add them */
267 extern void pci_hp_add_devices(struct pci_bus *bus);
268
269 extern int pcibios_unmap_io_space(struct pci_bus *bus);
270 extern int pcibios_map_io_space(struct pci_bus *bus);
271
272 #ifdef CONFIG_NUMA
273 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
274 #else
275 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = NUMA_NO_NODE)
276 #endif
277
278 #endif /* CONFIG_PPC64 */
279
280 /* Get the PCI host controller for an OF device */
281 extern struct pci_controller *pci_find_hose_for_OF_device(
282 struct device_node* node);
283
284 extern struct pci_controller *pci_find_controller_for_domain(int domain_nr);
285
286 /* Fill up host controller resources from the OF node */
287 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
288 struct device_node *dev, int primary);
289
290 /* Allocate & free a PCI host bridge structure */
291 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
292 extern void pcibios_free_controller(struct pci_controller *phb);
293 extern void pcibios_free_controller_deferred(struct pci_host_bridge *bridge);
294
295 #ifdef CONFIG_PCI
296 extern int pcibios_vaddr_is_ioport(void __iomem *address);
297 #else
298 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
299 {
300 return 0;
301 }
302 #endif /* CONFIG_PCI */
303
304 #endif /* __KERNEL__ */
305 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */
306
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