arch/sparc64/kernel/pci_impl.h

   1 /* pci_impl.h: Helper definitions for PCI controller support.
   2  *
   3  * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
   4  */
   5
   6 #ifndef PCI_IMPL_H
   7 #define PCI_IMPL_H
   8
   9 #include <linux/types.h>
  10 #include <linux/spinlock.h>
  11 #include <linux/pci.h>
  12 #include <linux/msi.h>
  13 #include <asm/io.h>
  14 #include <asm/prom.h>
  15 #include <asm/iommu.h>
  16
  17 /* The abstraction used here is that there are PCI controllers,
  18  * each with one (Sabre) or two (PSYCHO/SCHIZO) PCI bus modules
  19  * underneath.  Each PCI bus module uses an IOMMU (shared by both
  20  * PBMs of a controller, or per-PBM), and if a streaming buffer
  21  * is present, each PCI bus module has it's own. (ie. the IOMMU
  22  * might be shared between PBMs, the STC is never shared)
  23  * Furthermore, each PCI bus module controls it's own autonomous
  24  * PCI bus.
  25  */
  26
  27 #define PCI_STC_FLUSHFLAG_INIT(STC) \
  28         (*((STC)->strbuf_flushflag) = 0UL)
  29 #define PCI_STC_FLUSHFLAG_SET(STC) \
  30         (*((STC)->strbuf_flushflag) != 0UL)
  31
  32 #ifdef CONFIG_PCI_MSI
  33 struct pci_pbm_info;
  34 struct sparc64_msiq_ops {
  35         int (*get_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
  36                         unsigned long *head);
  37         int (*dequeue_msi)(struct pci_pbm_info *pbm, unsigned long msiqid,
  38                            unsigned long *head, unsigned long *msi);
  39         int (*set_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
  40                         unsigned long head);
  41         int (*msi_setup)(struct pci_pbm_info *pbm, unsigned long msiqid,
  42                          unsigned long msi, int is_msi64);
  43         int (*msi_teardown)(struct pci_pbm_info *pbm, unsigned long msi);
  44         int (*msiq_alloc)(struct pci_pbm_info *pbm);
  45         void (*msiq_free)(struct pci_pbm_info *pbm);
  46         int (*msiq_build_irq)(struct pci_pbm_info *pbm, unsigned long msiqid,
  47                               unsigned long devino);
  48 };
  49
  50 extern void sparc64_pbm_msi_init(struct pci_pbm_info *pbm,
  51                                  const struct sparc64_msiq_ops *ops);
  52
  53 struct sparc64_msiq_cookie {
  54         struct pci_pbm_info *pbm;
  55         unsigned long msiqid;
  56 };
  57 #endif
  58
  59 struct pci_controller_info;
  60
  61 struct pci_pbm_info {
  62         struct pci_pbm_info             *next;
  63         int                             index;
  64
  65         /* PCI controller we sit under. */
  66         struct pci_controller_info      *parent;
  67
  68         /* Physical address base of controller registers. */
  69         unsigned long                   controller_regs;
  70
  71         /* Physical address base of PBM registers. */
  72         unsigned long                   pbm_regs;
  73
  74         /* Physical address of DMA sync register, if any.  */
  75         unsigned long                   sync_reg;
  76
  77         /* Opaque 32-bit system bus Port ID. */
  78         u32                             portid;
  79
  80         /* Opaque 32-bit handle used for hypervisor calls.  */
  81         u32                             devhandle;
  82
  83         /* Chipset version information. */
  84         int                             chip_type;
  85 #define PBM_CHIP_TYPE_SABRE             1
  86 #define PBM_CHIP_TYPE_PSYCHO            2
  87 #define PBM_CHIP_TYPE_SCHIZO            3
  88 #define PBM_CHIP_TYPE_SCHIZO_PLUS       4
  89 #define PBM_CHIP_TYPE_TOMATILLO         5
  90         int                             chip_version;
  91         int                             chip_revision;
  92
  93         /* Name used for top-level resources. */
  94         char                            *name;
  95
  96         /* OBP specific information. */
  97         struct device_node              *prom_node;
  98         u64                             ino_bitmap;
  99
 100         /* PBM I/O and Memory space resources. */
 101         struct resource                 io_space;
 102         struct resource                 mem_space;
 103
 104         /* Base of PCI Config space, can be per-PBM or shared. */
 105         unsigned long                   config_space;
 106
 107         /* This will be 12 on PCI-E controllers, 8 elsewhere.  */
 108         unsigned long                   config_space_reg_bits;
 109
 110         /* State of 66MHz capabilities on this PBM. */
 111         int                             is_66mhz_capable;
 112         int                             all_devs_66mhz;
 113
 114 #ifdef CONFIG_PCI_MSI
 115         /* MSI info.  */
 116         u32                             msiq_num;
 117         u32                             msiq_ent_count;
 118         u32                             msiq_first;
 119         u32                             msiq_first_devino;
 120         u32                             msiq_rotor;
 121         struct sparc64_msiq_cookie      *msiq_irq_cookies;
 122         u32                             msi_num;
 123         u32                             msi_first;
 124         u32                             msi_data_mask;
 125         u32                             msix_data_width;
 126         u64                             msi32_start;
 127         u64                             msi64_start;
 128         u32                             msi32_len;
 129         u32                             msi64_len;
 130         void                            *msi_queues;
 131         unsigned long                   *msi_bitmap;
 132         unsigned int                    *msi_irq_table;
 133         int (*setup_msi_irq)(unsigned int *virt_irq_p, struct pci_dev *pdev,
 134                              struct msi_desc *entry);
 135         void (*teardown_msi_irq)(unsigned int virt_irq, struct pci_dev *pdev);
 136         const struct sparc64_msiq_ops   *msi_ops;
 137 #endif /* !(CONFIG_PCI_MSI) */
 138
 139         /* This PBM's streaming buffer. */
 140         struct strbuf                   stc;
 141
 142         /* IOMMU state, potentially shared by both PBM segments. */
 143         struct iommu                    *iommu;
 144
 145         /* Now things for the actual PCI bus probes. */
 146         unsigned int                    pci_first_busno;
 147         unsigned int                    pci_last_busno;
 148         struct pci_bus                  *pci_bus;
 149         void (*scan_bus)(struct pci_pbm_info *);
 150         struct pci_ops                  *pci_ops;
 151
 152         int                             numa_node;
 153 };
 154
 155 struct pci_controller_info {
 156         /* The PCI bus modules controlled by us. */
 157         struct pci_pbm_info             pbm_A;
 158         struct pci_pbm_info             pbm_B;
 159 };
 160
 161 extern struct pci_pbm_info *pci_pbm_root;
 162
 163 extern int pci_num_pbms;
 164
 165 /* PCI bus scanning and fixup support. */
 166 extern void pci_get_pbm_props(struct pci_pbm_info *pbm);
 167 extern struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm);
 168 extern void pci_determine_mem_io_space(struct pci_pbm_info *pbm);
 169
 170 extern int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev,
 171                                         unsigned int devfn,
 172                                         int where, int size,
 173                                         u32 *value);
 174 extern int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev,
 175                                          unsigned int devfn,
 176                                          int where, int size,
 177                                          u32 value);
 178
 179 /* Error reporting support. */
 180 extern void pci_scan_for_target_abort(struct pci_pbm_info *, struct pci_bus *);
 181 extern void pci_scan_for_master_abort(struct pci_pbm_info *, struct pci_bus *);
 182 extern void pci_scan_for_parity_error(struct pci_pbm_info *, struct pci_bus *);
 183
 184 /* Configuration space access. */
 185 extern void pci_config_read8(u8 *addr, u8 *ret);
 186 extern void pci_config_read16(u16 *addr, u16 *ret);
 187 extern void pci_config_read32(u32 *addr, u32 *ret);
 188 extern void pci_config_write8(u8 *addr, u8 val);
 189 extern void pci_config_write16(u16 *addr, u16 val);
 190 extern void pci_config_write32(u32 *addr, u32 val);
 191
 192 extern struct pci_ops sun4u_pci_ops;
 193 extern struct pci_ops sun4v_pci_ops;
 194
 195 #endif /* !(PCI_IMPL_H) */