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