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 __iomem *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
130 /* IRQ domain hierarchy */
131 struct irq_domain *dev_domain;
132 struct irq_domain *msi_domain;
133 struct fwnode_handle *fwnode;
134 };
135
136 /* These are used for config access before all the PCI probing
137 has been done. */
138 extern int early_read_config_byte(struct pci_controller *hose, int bus,
139 int dev_fn, int where, u8 *val);
140 extern int early_read_config_word(struct pci_controller *hose, int bus,
141 int dev_fn, int where, u16 *val);
142 extern int early_read_config_dword(struct pci_controller *hose, int bus,
143 int dev_fn, int where, u32 *val);
144 extern int early_write_config_byte(struct pci_controller *hose, int bus,
145 int dev_fn, int where, u8 val);
146 extern int early_write_config_word(struct pci_controller *hose, int bus,
147 int dev_fn, int where, u16 val);
148 extern int early_write_config_dword(struct pci_controller *hose, int bus,
149 int dev_fn, int where, u32 val);
150
151 extern int early_find_capability(struct pci_controller *hose, int bus,
152 int dev_fn, int cap);
153
154 extern void setup_indirect_pci(struct pci_controller* hose,
155 resource_size_t cfg_addr,
156 resource_size_t cfg_data, u32 flags);
157
158 extern int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
159 int offset, int len, u32 *val);
160
161 extern int __indirect_read_config(struct pci_controller *hose,
162 unsigned char bus_number, unsigned int devfn,
163 int offset, int len, u32 *val);
164
165 extern int indirect_write_config(struct pci_bus *bus, unsigned int devfn,
166 int offset, int len, u32 val);
167
pci_bus_to_host(const struct pci_bus * bus)168 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
169 {
170 return bus->sysdata;
171 }
172
173 #ifndef CONFIG_PPC64
174
175 extern int pci_device_from_OF_node(struct device_node *node,
176 u8 *bus, u8 *devfn);
177 extern void pci_create_OF_bus_map(void);
178
179 #else /* CONFIG_PPC64 */
180
181 /*
182 * PCI stuff, for nodes representing PCI devices, pointed to
183 * by device_node->data.
184 */
185 struct iommu_table;
186
187 struct pci_dn {
188 int flags;
189 #define PCI_DN_FLAG_IOV_VF 0x01
190 #define PCI_DN_FLAG_DEAD 0x02 /* Device has been hot-removed */
191
192 int busno; /* pci bus number */
193 int devfn; /* pci device and function number */
194 int vendor_id; /* Vendor ID */
195 int device_id; /* Device ID */
196 int class_code; /* Device class code */
197
198 struct pci_dn *parent;
199 struct pci_controller *phb; /* for pci devices */
200 struct iommu_table_group *table_group; /* for phb's or bridges */
201
202 int pci_ext_config_space; /* for pci devices */
203 #ifdef CONFIG_EEH
204 struct eeh_dev *edev; /* eeh device */
205 #endif
206 #define IODA_INVALID_PE 0xFFFFFFFF
207 unsigned int pe_number;
208 #ifdef CONFIG_PCI_IOV
209 u16 vfs_expanded; /* number of VFs IOV BAR expanded */
210 u16 num_vfs; /* number of VFs enabled*/
211 unsigned int *pe_num_map; /* PE# for the first VF PE or array */
212 bool m64_single_mode; /* Use M64 BAR in Single Mode */
213 #define IODA_INVALID_M64 (-1)
214 int (*m64_map)[PCI_SRIOV_NUM_BARS]; /* Only used on powernv */
215 int last_allow_rc; /* Only used on pseries */
216 #endif /* CONFIG_PCI_IOV */
217 int mps; /* Maximum Payload Size */
218 struct list_head child_list;
219 struct list_head list;
220 struct resource holes[PCI_SRIOV_NUM_BARS];
221 };
222
223 /* Get the pointer to a device_node's pci_dn */
224 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
225
226 extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus,
227 int devfn);
228 extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev);
229 extern struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
230 struct device_node *dn);
231 extern void pci_remove_device_node_info(struct device_node *dn);
232
233 #ifdef CONFIG_PCI_IOV
234 struct pci_dn *add_sriov_vf_pdns(struct pci_dev *pdev);
235 void remove_sriov_vf_pdns(struct pci_dev *pdev);
236 #endif
237
pci_device_from_OF_node(struct device_node * np,u8 * bus,u8 * devfn)238 static inline int pci_device_from_OF_node(struct device_node *np,
239 u8 *bus, u8 *devfn)
240 {
241 if (!PCI_DN(np))
242 return -ENODEV;
243 *bus = PCI_DN(np)->busno;
244 *devfn = PCI_DN(np)->devfn;
245 return 0;
246 }
247
248 #if defined(CONFIG_EEH)
pdn_to_eeh_dev(struct pci_dn * pdn)249 static inline struct eeh_dev *pdn_to_eeh_dev(struct pci_dn *pdn)
250 {
251 return pdn ? pdn->edev : NULL;
252 }
253 #else
254 #define pdn_to_eeh_dev(x) (NULL)
255 #endif
256
257 /** Find the bus corresponding to the indicated device node */
258 extern struct pci_bus *pci_find_bus_by_node(struct device_node *dn);
259
260 /** Remove all of the PCI devices under this bus */
261 extern void pci_hp_remove_devices(struct pci_bus *bus);
262
263 /** Discover new pci devices under this bus, and add them */
264 extern void pci_hp_add_devices(struct pci_bus *bus);
265
266 extern int pcibios_unmap_io_space(struct pci_bus *bus);
267 extern int pcibios_map_io_space(struct pci_bus *bus);
268
269 #ifdef CONFIG_NUMA
270 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
271 #else
272 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = NUMA_NO_NODE)
273 #endif
274
275 #endif /* CONFIG_PPC64 */
276
277 /* Get the PCI host controller for an OF device */
278 extern struct pci_controller *pci_find_hose_for_OF_device(
279 struct device_node* node);
280
281 extern struct pci_controller *pci_find_controller_for_domain(int domain_nr);
282
283 /* Fill up host controller resources from the OF node */
284 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
285 struct device_node *dev, int primary);
286
287 /* Allocate & free a PCI host bridge structure */
288 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
289 extern void pcibios_free_controller(struct pci_controller *phb);
290 extern void pcibios_free_controller_deferred(struct pci_host_bridge *bridge);
291
292 #ifdef CONFIG_PCI
293 extern int pcibios_vaddr_is_ioport(void __iomem *address);
294 #else
pcibios_vaddr_is_ioport(void __iomem * address)295 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
296 {
297 return 0;
298 }
299 #endif /* CONFIG_PCI */
300
301 #endif /* __KERNEL__ */
302 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */
303