arch/powerpc/include/asm/pci-bridge.h

   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
 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
 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)
 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
 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 */