1 #ifndef _ASM_POWERPC_PCI_BRIDGE_H
2 #define _ASM_POWERPC_PCI_BRIDGE_H
3 #ifdef __KERNEL__
4 /*
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
9 */
10 #include <linux/pci.h>
11 #include <linux/list.h>
12 #include <linux/ioport.h>
13
14 struct device_node;
15
16 enum {
17 /* Force re-assigning all resources (ignore firmware
18 * setup completely)
19 */
20 PPC_PCI_REASSIGN_ALL_RSRC = 0x00000001,
21
22 /* Re-assign all bus numbers */
23 PPC_PCI_REASSIGN_ALL_BUS = 0x00000002,
24
25 /* Do not try to assign, just use existing setup */
26 PPC_PCI_PROBE_ONLY = 0x00000004,
27
28 /* Don't bother with ISA alignment unless the bridge has
29 * ISA forwarding enabled
30 */
31 PPC_PCI_CAN_SKIP_ISA_ALIGN = 0x00000008,
32
33 /* Enable domain numbers in /proc */
34 PPC_PCI_ENABLE_PROC_DOMAINS = 0x00000010,
35 /* ... except for domain 0 */
36 PPC_PCI_COMPAT_DOMAIN_0 = 0x00000020,
37 };
38 #ifdef CONFIG_PCI
39 extern unsigned int ppc_pci_flags;
40
ppc_pci_set_flags(int flags)41 static inline void ppc_pci_set_flags(int flags)
42 {
43 ppc_pci_flags = flags;
44 }
45
ppc_pci_add_flags(int flags)46 static inline void ppc_pci_add_flags(int flags)
47 {
48 ppc_pci_flags |= flags;
49 }
50
ppc_pci_has_flag(int flag)51 static inline int ppc_pci_has_flag(int flag)
52 {
53 return (ppc_pci_flags & flag);
54 }
55 #else
ppc_pci_set_flags(int flags)56 static inline void ppc_pci_set_flags(int flags) { }
ppc_pci_add_flags(int flags)57 static inline void ppc_pci_add_flags(int flags) { }
ppc_pci_has_flag(int flag)58 static inline int ppc_pci_has_flag(int flag)
59 {
60 return 0;
61 }
62 #endif
63
64
65 /*
66 * Structure of a PCI controller (host bridge)
67 */
68 struct pci_controller {
69 struct pci_bus *bus;
70 char is_dynamic;
71 #ifdef CONFIG_PPC64
72 int node;
73 #endif
74 struct device_node *dn;
75 struct list_head list_node;
76 struct device *parent;
77
78 int first_busno;
79 int last_busno;
80 int self_busno;
81
82 void __iomem *io_base_virt;
83 #ifdef CONFIG_PPC64
84 void *io_base_alloc;
85 #endif
86 resource_size_t io_base_phys;
87 resource_size_t pci_io_size;
88
89 /* Some machines (PReP) have a non 1:1 mapping of
90 * the PCI memory space in the CPU bus space
91 */
92 resource_size_t pci_mem_offset;
93
94 /* Some machines have a special region to forward the ISA
95 * "memory" cycles such as VGA memory regions. Left to 0
96 * if unsupported
97 */
98 resource_size_t isa_mem_phys;
99 resource_size_t isa_mem_size;
100
101 struct pci_ops *ops;
102 unsigned int __iomem *cfg_addr;
103 void __iomem *cfg_data;
104
105 /*
106 * Used for variants of PCI indirect handling and possible quirks:
107 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
108 * EXT_REG - provides access to PCI-e extended registers
109 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS
110 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
111 * to determine which bus number to match on when generating type0
112 * config cycles
113 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
114 * hanging if we don't have link and try to do config cycles to
115 * anything but the PHB. Only allow talking to the PHB if this is
116 * set.
117 * BIG_ENDIAN - cfg_addr is a big endian register
118 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
119 * the PLB4. Effectively disable MRM commands by setting this.
120 */
121 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
122 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002
123 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
124 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
125 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010
126 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020
127 u32 indirect_type;
128 /* Currently, we limit ourselves to 1 IO range and 3 mem
129 * ranges since the common pci_bus structure can't handle more
130 */
131 struct resource io_resource;
132 struct resource mem_resources[3];
133 int global_number; /* PCI domain number */
134
135 resource_size_t dma_window_base_cur;
136 resource_size_t dma_window_size;
137
138 #ifdef CONFIG_PPC64
139 unsigned long buid;
140
141 void *private_data;
142 #endif /* CONFIG_PPC64 */
143 };
144
145 /* These are used for config access before all the PCI probing
146 has been done. */
147 extern int early_read_config_byte(struct pci_controller *hose, int bus,
148 int dev_fn, int where, u8 *val);
149 extern int early_read_config_word(struct pci_controller *hose, int bus,
150 int dev_fn, int where, u16 *val);
151 extern int early_read_config_dword(struct pci_controller *hose, int bus,
152 int dev_fn, int where, u32 *val);
153 extern int early_write_config_byte(struct pci_controller *hose, int bus,
154 int dev_fn, int where, u8 val);
155 extern int early_write_config_word(struct pci_controller *hose, int bus,
156 int dev_fn, int where, u16 val);
157 extern int early_write_config_dword(struct pci_controller *hose, int bus,
158 int dev_fn, int where, u32 val);
159
160 extern int early_find_capability(struct pci_controller *hose, int bus,
161 int dev_fn, int cap);
162
163 extern void setup_indirect_pci(struct pci_controller* hose,
164 resource_size_t cfg_addr,
165 resource_size_t cfg_data, u32 flags);
166
pci_bus_to_host(const struct pci_bus * bus)167 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
168 {
169 return bus->sysdata;
170 }
171
172 #ifndef CONFIG_PPC64
173
pci_bus_to_OF_node(struct pci_bus * bus)174 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
175 {
176 struct pci_controller *host;
177
178 if (bus->self)
179 return pci_device_to_OF_node(bus->self);
180 host = pci_bus_to_host(bus);
181 return host ? host->dn : NULL;
182 }
183
isa_vaddr_is_ioport(void __iomem * address)184 static inline int isa_vaddr_is_ioport(void __iomem *address)
185 {
186 /* No specific ISA handling on ppc32 at this stage, it
187 * all goes through PCI
188 */
189 return 0;
190 }
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 busno; /* pci bus number */
202 int devfn; /* pci device and function number */
203
204 struct pci_controller *phb; /* for pci devices */
205 struct iommu_table *iommu_table; /* for phb's or bridges */
206 struct device_node *node; /* back-pointer to the device_node */
207
208 int pci_ext_config_space; /* for pci devices */
209
210 #ifdef CONFIG_EEH
211 struct pci_dev *pcidev; /* back-pointer to the pci device */
212 int class_code; /* pci device class */
213 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
214 int eeh_config_addr;
215 int eeh_pe_config_addr; /* new-style partition endpoint address */
216 int eeh_check_count; /* # times driver ignored error */
217 int eeh_freeze_count; /* # times this device froze up. */
218 int eeh_false_positives; /* # times this device reported #ff's */
219 u32 config_space[16]; /* saved PCI config space */
220 #endif
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 device_node *fetch_dev_dn(struct pci_dev *dev);
227 extern void * update_dn_pci_info(struct device_node *dn, void *data);
228
229 /* Get a device_node from a pci_dev. This code must be fast except
230 * in the case where the sysdata is incorrect and needs to be fixed
231 * up (this will only happen once). */
pci_device_to_OF_node(struct pci_dev * dev)232 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
233 {
234 return dev->dev.of_node ? dev->dev.of_node : fetch_dev_dn(dev);
235 }
236
pci_device_from_OF_node(struct device_node * np,u8 * bus,u8 * devfn)237 static inline int pci_device_from_OF_node(struct device_node *np,
238 u8 *bus, u8 *devfn)
239 {
240 if (!PCI_DN(np))
241 return -ENODEV;
242 *bus = PCI_DN(np)->busno;
243 *devfn = PCI_DN(np)->devfn;
244 return 0;
245 }
246
pci_bus_to_OF_node(struct pci_bus * bus)247 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
248 {
249 if (bus->self)
250 return pci_device_to_OF_node(bus->self);
251 else
252 return bus->dev.of_node; /* Must be root bus (PHB) */
253 }
254
255 /** Find the bus corresponding to the indicated device node */
256 extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn);
257
258 /** Remove all of the PCI devices under this bus */
259 extern void pcibios_remove_pci_devices(struct pci_bus *bus);
260
261 /** Discover new pci devices under this bus, and add them */
262 extern void pcibios_add_pci_devices(struct pci_bus *bus);
263
264
265 extern void isa_bridge_find_early(struct pci_controller *hose);
266
isa_vaddr_is_ioport(void __iomem * address)267 static inline int isa_vaddr_is_ioport(void __iomem *address)
268 {
269 /* Check if address hits the reserved legacy IO range */
270 unsigned long ea = (unsigned long)address;
271 return ea >= ISA_IO_BASE && ea < ISA_IO_END;
272 }
273
274 extern int pcibios_unmap_io_space(struct pci_bus *bus);
275 extern int pcibios_map_io_space(struct pci_bus *bus);
276
277 #ifdef CONFIG_NUMA
278 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
279 #else
280 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
281 #endif
282
283 #endif /* CONFIG_PPC64 */
284
285 /* Get the PCI host controller for an OF device */
286 extern struct pci_controller *pci_find_hose_for_OF_device(
287 struct device_node* node);
288
289 /* Fill up host controller resources from the OF node */
290 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
291 struct device_node *dev, int primary);
292
293 /* Allocate & free a PCI host bridge structure */
294 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
295 extern void pcibios_free_controller(struct pci_controller *phb);
296 extern void pcibios_setup_phb_resources(struct pci_controller *hose);
297
298 #ifdef CONFIG_PCI
299 extern int pcibios_vaddr_is_ioport(void __iomem *address);
300 #else
pcibios_vaddr_is_ioport(void __iomem * address)301 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
302 {
303 return 0;
304 }
305 #endif /* CONFIG_PCI */
306
307 #endif /* __KERNEL__ */
308 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */
309