1 #ifndef _ASM_POWERPC_PCI_BRIDGE_H
2 #define _ASM_POWERPC_PCI_BRIDGE_H
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.
10 #include <linux/pci.h>
11 #include <linux/list.h>
12 #include <linux/ioport.h>
17 * PCI controller operations
19 struct pci_controller_ops {
20 void (*dma_dev_setup)(struct pci_dev *pdev);
21 void (*dma_bus_setup)(struct pci_bus *bus);
23 int (*probe_mode)(struct pci_bus *bus);
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);
29 void (*disable_device)(struct pci_dev *pdev);
31 void (*release_device)(struct pci_dev *pdev);
33 /* Called during PCI resource reassignment */
34 resource_size_t (*window_alignment)(struct pci_bus *bus,
36 void (*setup_bridge)(struct pci_bus *bus,
38 void (*reset_secondary_bus)(struct pci_dev *pdev);
41 int (*setup_msi_irqs)(struct pci_dev *pdev,
43 void (*teardown_msi_irqs)(struct pci_dev *pdev);
46 int (*dma_set_mask)(struct pci_dev *pdev, u64 dma_mask);
47 u64 (*dma_get_required_mask)(struct pci_dev *pdev);
49 void (*shutdown)(struct pci_controller *hose);
53 * Structure of a PCI controller (host bridge)
55 struct pci_controller {
61 struct device_node *dn;
62 struct list_head list_node;
63 struct device *parent;
70 void __iomem *io_base_virt;
74 resource_size_t io_base_phys;
75 resource_size_t pci_io_size;
77 /* Some machines have a special region to forward the ISA
78 * "memory" cycles such as VGA memory regions. Left to 0
81 resource_size_t isa_mem_phys;
82 resource_size_t isa_mem_size;
84 struct pci_controller_ops controller_ops;
86 unsigned int __iomem *cfg_addr;
87 void __iomem *cfg_data;
90 * Used for variants of PCI indirect handling and possible quirks:
91 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
92 * EXT_REG - provides access to PCI-e extended registers
93 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS
94 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
95 * to determine which bus number to match on when generating type0
97 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
98 * hanging if we don't have link and try to do config cycles to
99 * anything but the PHB. Only allow talking to the PHB if this is
101 * BIG_ENDIAN - cfg_addr is a big endian register
102 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
103 * the PLB4. Effectively disable MRM commands by setting this.
104 * FSL_CFG_REG_LINK - Freescale controller version in which the PCIe
105 * link status is in a RC PCIe cfg register (vs being a SoC register)
107 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
108 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002
109 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
110 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
111 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010
112 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020
113 #define PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK 0x00000040
115 /* Currently, we limit ourselves to 1 IO range and 3 mem
116 * ranges since the common pci_bus structure can't handle more
118 struct resource io_resource;
119 struct resource mem_resources[3];
120 resource_size_t mem_offset[3];
121 int global_number; /* PCI domain number */
123 resource_size_t dma_window_base_cur;
124 resource_size_t dma_window_size;
128 struct pci_dn *pci_data;
129 #endif /* CONFIG_PPC64 */
134 /* These are used for config access before all the PCI probing
136 extern int early_read_config_byte(struct pci_controller *hose, int bus,
137 int dev_fn, int where, u8 *val);
138 extern int early_read_config_word(struct pci_controller *hose, int bus,
139 int dev_fn, int where, u16 *val);
140 extern int early_read_config_dword(struct pci_controller *hose, int bus,
141 int dev_fn, int where, u32 *val);
142 extern int early_write_config_byte(struct pci_controller *hose, int bus,
143 int dev_fn, int where, u8 val);
144 extern int early_write_config_word(struct pci_controller *hose, int bus,
145 int dev_fn, int where, u16 val);
146 extern int early_write_config_dword(struct pci_controller *hose, int bus,
147 int dev_fn, int where, u32 val);
149 extern int early_find_capability(struct pci_controller *hose, int bus,
150 int dev_fn, int cap);
152 extern void setup_indirect_pci(struct pci_controller* hose,
153 resource_size_t cfg_addr,
154 resource_size_t cfg_data, u32 flags);
156 extern int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
157 int offset, int len, u32 *val);
159 extern int __indirect_read_config(struct pci_controller *hose,
160 unsigned char bus_number, unsigned int devfn,
161 int offset, int len, u32 *val);
163 extern int indirect_write_config(struct pci_bus *bus, unsigned int devfn,
164 int offset, int len, u32 val);
166 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
173 extern int pci_device_from_OF_node(struct device_node *node,
175 extern void pci_create_OF_bus_map(void);
177 static inline int isa_vaddr_is_ioport(void __iomem *address)
179 /* No specific ISA handling on ppc32 at this stage, it
180 * all goes through PCI
185 #else /* CONFIG_PPC64 */
188 * PCI stuff, for nodes representing PCI devices, pointed to
189 * by device_node->data.
195 #define PCI_DN_FLAG_IOV_VF 0x01
197 int busno; /* pci bus number */
198 int devfn; /* pci device and function number */
199 int vendor_id; /* Vendor ID */
200 int device_id; /* Device ID */
201 int class_code; /* Device class code */
203 struct pci_dn *parent;
204 struct pci_controller *phb; /* for pci devices */
205 struct iommu_table_group *table_group; /* for phb's or bridges */
206 struct device_node *node; /* back-pointer to the device_node */
208 int pci_ext_config_space; /* for pci devices */
210 struct pci_dev *pcidev; /* back-pointer to the pci device */
212 struct eeh_dev *edev; /* eeh device */
214 #define IODA_INVALID_PE 0xFFFFFFFF
215 #ifdef CONFIG_PPC_POWERNV
216 unsigned int pe_number;
217 int vf_index; /* VF index in the PF */
218 #ifdef CONFIG_PCI_IOV
219 u16 vfs_expanded; /* number of VFs IOV BAR expanded */
220 u16 num_vfs; /* number of VFs enabled*/
221 unsigned int *pe_num_map; /* PE# for the first VF PE or array */
222 bool m64_single_mode; /* Use M64 BAR in Single Mode */
223 #define IODA_INVALID_M64 (-1)
224 int (*m64_map)[PCI_SRIOV_NUM_BARS];
225 #endif /* CONFIG_PCI_IOV */
226 int mps; /* Maximum Payload Size */
228 struct list_head child_list;
229 struct list_head list;
232 /* Get the pointer to a device_node's pci_dn */
233 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
235 extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus,
237 extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev);
238 extern struct pci_dn *add_dev_pci_data(struct pci_dev *pdev);
239 extern void remove_dev_pci_data(struct pci_dev *pdev);
240 extern struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
241 struct device_node *dn);
242 extern void pci_remove_device_node_info(struct device_node *dn);
244 static inline int pci_device_from_OF_node(struct device_node *np,
249 *bus = PCI_DN(np)->busno;
250 *devfn = PCI_DN(np)->devfn;
254 #if defined(CONFIG_EEH)
255 static inline struct eeh_dev *pdn_to_eeh_dev(struct pci_dn *pdn)
257 return pdn ? pdn->edev : NULL;
260 #define pdn_to_eeh_dev(x) (NULL)
263 /** Find the bus corresponding to the indicated device node */
264 extern struct pci_bus *pci_find_bus_by_node(struct device_node *dn);
266 /** Remove all of the PCI devices under this bus */
267 extern void pci_hp_remove_devices(struct pci_bus *bus);
269 /** Discover new pci devices under this bus, and add them */
270 extern void pci_hp_add_devices(struct pci_bus *bus);
273 extern void isa_bridge_find_early(struct pci_controller *hose);
275 static inline int isa_vaddr_is_ioport(void __iomem *address)
277 /* Check if address hits the reserved legacy IO range */
278 unsigned long ea = (unsigned long)address;
279 return ea >= ISA_IO_BASE && ea < ISA_IO_END;
282 extern int pcibios_unmap_io_space(struct pci_bus *bus);
283 extern int pcibios_map_io_space(struct pci_bus *bus);
286 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
288 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
291 #endif /* CONFIG_PPC64 */
293 /* Get the PCI host controller for an OF device */
294 extern struct pci_controller *pci_find_hose_for_OF_device(
295 struct device_node* node);
297 /* Fill up host controller resources from the OF node */
298 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
299 struct device_node *dev, int primary);
301 /* Allocate & free a PCI host bridge structure */
302 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
303 extern void pcibios_free_controller(struct pci_controller *phb);
306 extern int pcibios_vaddr_is_ioport(void __iomem *address);
308 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
312 #endif /* CONFIG_PCI */
314 #endif /* __KERNEL__ */
315 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */