[POWERPC] pasemi: Add flag management functions to dma_lib
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-powerpc / pci-bridge.h
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1#ifndef _ASM_POWERPC_PCI_BRIDGE_H
2#define _ASM_POWERPC_PCI_BRIDGE_H
88ced031 3#ifdef __KERNEL__
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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 */
5531e41b 10#include <linux/pci.h>
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11#include <linux/list.h>
12#include <linux/ioport.h>
13
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14struct device_node;
15
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16extern unsigned int ppc_pci_flags;
17enum {
18 /* Force re-assigning all resources (ignore firmware
19 * setup completely)
20 */
21 PPC_PCI_REASSIGN_ALL_RSRC = 0x00000001,
22
23 /* Re-assign all bus numbers */
24 PPC_PCI_REASSIGN_ALL_BUS = 0x00000002,
25
26 /* Do not try to assign, just use existing setup */
27 PPC_PCI_PROBE_ONLY = 0x00000004,
28
29 /* Don't bother with ISA alignment unless the bridge has
30 * ISA forwarding enabled
31 */
32 PPC_PCI_CAN_SKIP_ISA_ALIGN = 0x00000008,
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33
34 /* Enable domain numbers in /proc */
35 PPC_PCI_ENABLE_PROC_DOMAINS = 0x00000010,
36 /* ... except for domain 0 */
37 PPC_PCI_COMPAT_DOMAIN_0 = 0x00000020,
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38};
39
40
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41/*
42 * Structure of a PCI controller (host bridge)
43 */
44struct pci_controller {
45 struct pci_bus *bus;
a4c9e328 46 char is_dynamic;
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47#ifdef CONFIG_PPC64
48 int node;
49#endif
44ef3390 50 struct device_node *dn;
a4c9e328 51 struct list_head list_node;
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52 struct device *parent;
53
54 int first_busno;
55 int last_busno;
7211991f 56#ifndef CONFIG_PPC64
5531e41b 57 int self_busno;
7211991f 58#endif
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59
60 void __iomem *io_base_virt;
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61#ifdef CONFIG_PPC64
62 void *io_base_alloc;
63#endif
5531e41b 64 resource_size_t io_base_phys;
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65#ifndef CONFIG_PPC64
66 resource_size_t pci_io_size;
67#endif
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68
69 /* Some machines (PReP) have a non 1:1 mapping of
70 * the PCI memory space in the CPU bus space
71 */
72 resource_size_t pci_mem_offset;
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73#ifdef CONFIG_PPC64
74 unsigned long pci_io_size;
75#endif
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76
77 struct pci_ops *ops;
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78 unsigned int __iomem *cfg_addr;
79 void __iomem *cfg_data;
5531e41b 80
7211991f 81#ifndef CONFIG_PPC64
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82 /*
83 * Used for variants of PCI indirect handling and possible quirks:
84 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
85 * EXT_REG - provides access to PCI-e extended registers
86 * SURPRESS_PRIMARY_BUS - we surpress the setting of PCI_PRIMARY_BUS
87 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
88 * to determine which bus number to match on when generating type0
89 * config cycles
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90 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
91 * hanging if we don't have link and try to do config cycles to
92 * anything but the PHB. Only allow talking to the PHB if this is
93 * set.
2e56ff20 94 * BIG_ENDIAN - cfg_addr is a big endian register
5531e41b 95 */
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96#define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
97#define PPC_INDIRECT_TYPE_EXT_REG 0x00000002
98#define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
99#define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
100#define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010
5531e41b 101 u32 indirect_type;
7211991f 102#endif /* !CONFIG_PPC64 */
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103 /* Currently, we limit ourselves to 1 IO range and 3 mem
104 * ranges since the common pci_bus structure can't handle more
105 */
106 struct resource io_resource;
107 struct resource mem_resources[3];
5516b540 108 int global_number; /* PCI domain number */
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109#ifdef CONFIG_PPC64
110 unsigned long buid;
111 unsigned long dma_window_base_cur;
112 unsigned long dma_window_size;
113
114 void *private_data;
115#endif /* CONFIG_PPC64 */
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116};
117
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118#ifndef CONFIG_PPC64
119
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120static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
121{
122 return bus->sysdata;
123}
124
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125static inline int isa_vaddr_is_ioport(void __iomem *address)
126{
127 /* No specific ISA handling on ppc32 at this stage, it
128 * all goes through PCI
129 */
130 return 0;
131}
132
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133/* These are used for config access before all the PCI probing
134 has been done. */
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135extern int early_read_config_byte(struct pci_controller *hose, int bus,
136 int dev_fn, int where, u8 *val);
137extern int early_read_config_word(struct pci_controller *hose, int bus,
138 int dev_fn, int where, u16 *val);
139extern int early_read_config_dword(struct pci_controller *hose, int bus,
140 int dev_fn, int where, u32 *val);
141extern int early_write_config_byte(struct pci_controller *hose, int bus,
142 int dev_fn, int where, u8 val);
143extern int early_write_config_word(struct pci_controller *hose, int bus,
144 int dev_fn, int where, u16 val);
145extern int early_write_config_dword(struct pci_controller *hose, int bus,
146 int dev_fn, int where, u32 val);
5531e41b 147
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148extern int early_find_capability(struct pci_controller *hose, int bus,
149 int dev_fn, int cap);
150
5531e41b 151extern void setup_indirect_pci(struct pci_controller* hose,
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152 resource_size_t cfg_addr,
153 resource_size_t cfg_data, u32 flags);
5531e41b 154extern void setup_grackle(struct pci_controller *hose);
7cd1de6b 155#else /* CONFIG_PPC64 */
1da177e4 156
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157/*
158 * PCI stuff, for nodes representing PCI devices, pointed to
159 * by device_node->data.
160 */
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161struct iommu_table;
162
163struct pci_dn {
7684b40c 164 int busno; /* pci bus number */
7684b40c 165 int devfn; /* pci device and function number */
b5166cc2 166
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167 struct pci_controller *phb; /* for pci devices */
168 struct iommu_table *iommu_table; /* for phb's or bridges */
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169 struct device_node *node; /* back-pointer to the device_node */
170
171 int pci_ext_config_space; /* for pci devices */
172
173#ifdef CONFIG_EEH
b6ed42a7 174 struct pci_dev *pcidev; /* back-pointer to the pci device */
86bcab49 175 int class_code; /* pci device class */
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176 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
177 int eeh_config_addr;
25e591f6 178 int eeh_pe_config_addr; /* new-style partition endpoint address */
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179 int eeh_check_count; /* # times driver ignored error */
180 int eeh_freeze_count; /* # times this device froze up. */
181 int eeh_false_positives; /* # times this device reported #ff's */
1635317f 182 u32 config_space[16]; /* saved PCI config space */
c2e221e8 183#endif
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184};
185
186/* Get the pointer to a device_node's pci_dn */
187#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
188
7cd1de6b 189extern struct device_node *fetch_dev_dn(struct pci_dev *dev);
1da177e4 190
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191/* Get a device_node from a pci_dev. This code must be fast except
192 * in the case where the sysdata is incorrect and needs to be fixed
193 * up (this will only happen once).
194 * In this case the sysdata will have been inherited from a PCI host
195 * bridge or a PCI-PCI bridge further up the tree, so it will point
196 * to a valid struct pci_dn, just not the one we want.
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197 */
198static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
199{
200 struct device_node *dn = dev->sysdata;
1635317f 201 struct pci_dn *pdn = dn->data;
1da177e4 202
1635317f 203 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
1da177e4 204 return dn; /* fast path. sysdata is good */
1635317f 205 return fetch_dev_dn(dev);
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206}
207
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208static inline int pci_device_from_OF_node(struct device_node *np,
209 u8 *bus, u8 *devfn)
210{
211 if (!PCI_DN(np))
212 return -ENODEV;
213 *bus = PCI_DN(np)->busno;
214 *devfn = PCI_DN(np)->devfn;
215 return 0;
216}
217
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218static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
219{
220 if (bus->self)
221 return pci_device_to_OF_node(bus->self);
222 else
223 return bus->sysdata; /* Must be root bus (PHB) */
224}
225
2bf6a8fa 226/** Find the bus corresponding to the indicated device node */
7cd1de6b 227extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn);
2bf6a8fa 228
2bf6a8fa 229/** Remove all of the PCI devices under this bus */
7cd1de6b 230extern void pcibios_remove_pci_devices(struct pci_bus *bus);
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231
232/** Discover new pci devices under this bus, and add them */
7cd1de6b 233extern void pcibios_add_pci_devices(struct pci_bus *bus);
bf5e2ba2 234extern void pcibios_fixup_new_pci_devices(struct pci_bus *bus);
2bf6a8fa 235
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236extern int pcibios_remove_root_bus(struct pci_controller *phb);
237
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238static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
239{
240 struct device_node *busdn = bus->sysdata;
241
242 BUG_ON(busdn == NULL);
1635317f 243 return PCI_DN(busdn)->phb;
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244}
245
b5166cc2 246
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247extern void isa_bridge_find_early(struct pci_controller *hose);
248
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249static inline int isa_vaddr_is_ioport(void __iomem *address)
250{
251 /* Check if address hits the reserved legacy IO range */
252 unsigned long ea = (unsigned long)address;
253 return ea >= ISA_IO_BASE && ea < ISA_IO_END;
254}
255
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256extern int pcibios_unmap_io_space(struct pci_bus *bus);
257extern int pcibios_map_io_space(struct pci_bus *bus);
258
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259/* Return values for ppc_md.pci_probe_mode function */
260#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
261#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
262#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
263
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264#ifdef CONFIG_NUMA
265#define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
266#else
267#define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
268#endif
269
7cd1de6b 270#endif /* CONFIG_PPC64 */
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271
272/* Get the PCI host controller for an OF device */
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273extern struct pci_controller *pci_find_hose_for_OF_device(
274 struct device_node* node);
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275
276/* Fill up host controller resources from the OF node */
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277extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
278 struct device_node *dev, int primary);
5531e41b 279
5131d4d8 280/* Allocate & free a PCI host bridge structure */
7cd1de6b 281extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
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282extern void pcibios_free_controller(struct pci_controller *phb);
283
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284#ifdef CONFIG_PCI
285extern unsigned long pci_address_to_pio(phys_addr_t address);
6dfbde20 286extern int pcibios_vaddr_is_ioport(void __iomem *address);
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287#else
288static inline unsigned long pci_address_to_pio(phys_addr_t address)
289{
290 return (unsigned long)-1;
291}
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292static inline int pcibios_vaddr_is_ioport(void __iomem *address)
293{
294 return 0;
295}
7cd1de6b 296#endif /* CONFIG_PCI */
5531e41b 297
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298#endif /* __KERNEL__ */
299#endif /* _ASM_POWERPC_PCI_BRIDGE_H */