arch/sparc/kernel/pci_impl.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* pci_impl.h: Helper definitions for PCI controller support.
   3  *
   4  * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
   5  */
   6
   7 #ifndef PCI_IMPL_H
   8 #define PCI_IMPL_H
   9
  10 #include <linux/types.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/pci.h>
  13 #include <linux/msi.h>
  14 #include <asm/io.h>
  15 #include <asm/prom.h>
  16 #include <asm/iommu.h>
  17
  18 /* The abstraction used here is that there are PCI controllers,
  19  * each with one (Sabre) or two (PSYCHO/SCHIZO) PCI bus modules
  20  * underneath.  Each PCI bus module uses an IOMMU (shared by both
  21  * PBMs of a controller, or per-PBM), and if a streaming buffer
  22  * is present, each PCI bus module has its own. (ie. the IOMMU
  23  * might be shared between PBMs, the STC is never shared)
  24  * Furthermore, each PCI bus module controls its own autonomous
  25  * PCI bus.
  26  */
  27
  28 #define PCI_STC_FLUSHFLAG_INIT(STC) \
  29         (*((STC)->strbuf_flushflag) = 0UL)
  30 #define PCI_STC_FLUSHFLAG_SET(STC) \
  31         (*((STC)->strbuf_flushflag) != 0UL)
  32
  33 #ifdef CONFIG_PCI_MSI
  34 struct pci_pbm_info;
  35 struct sparc64_msiq_ops {
  36         int (*get_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
  37                         unsigned long *head);
  38         int (*dequeue_msi)(struct pci_pbm_info *pbm, unsigned long msiqid,
  39                            unsigned long *head, unsigned long *msi);
  40         int (*set_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
  41                         unsigned long head);
  42         int (*msi_setup)(struct pci_pbm_info *pbm, unsigned long msiqid,
  43                          unsigned long msi, int is_msi64);
  44         int (*msi_teardown)(struct pci_pbm_info *pbm, unsigned long msi);
  45         int (*msiq_alloc)(struct pci_pbm_info *pbm);
  46         void (*msiq_free)(struct pci_pbm_info *pbm);
  47         int (*msiq_build_irq)(struct pci_pbm_info *pbm, unsigned long msiqid,
  48                               unsigned long devino);
  49 };
  50
  51 void sparc64_pbm_msi_init(struct pci_pbm_info *pbm,
  52                           const struct sparc64_msiq_ops *ops);
  53
  54 struct sparc64_msiq_cookie {
  55         struct pci_pbm_info *pbm;
  56         unsigned long msiqid;
  57 };
  58 #endif
  59
  60 struct pci_pbm_info {
  61         struct pci_pbm_info             *next;
  62         struct pci_pbm_info             *sibling;
  63         int                             index;
  64
  65         /* Physical address base of controller registers. */
  66         unsigned long                   controller_regs;
  67
  68         /* Physical address base of PBM registers. */
  69         unsigned long                   pbm_regs;
  70
  71         /* Physical address of DMA sync register, if any.  */
  72         unsigned long                   sync_reg;
  73
  74         /* Opaque 32-bit system bus Port ID. */
  75         u32                             portid;
  76
  77         /* Opaque 32-bit handle used for hypervisor calls.  */
  78         u32                             devhandle;
  79
  80         /* Chipset version information. */
  81         int                             chip_type;
  82 #define PBM_CHIP_TYPE_SABRE             1
  83 #define PBM_CHIP_TYPE_PSYCHO            2
  84 #define PBM_CHIP_TYPE_SCHIZO            3
  85 #define PBM_CHIP_TYPE_SCHIZO_PLUS       4
  86 #define PBM_CHIP_TYPE_TOMATILLO         5
  87         int                             chip_version;
  88         int                             chip_revision;
  89
  90         /* Name used for top-level resources. */
  91         const char                      *name;
  92
  93         /* OBP specific information. */
  94         struct platform_device          *op;
  95         u64                             ino_bitmap;
  96
  97         /* PBM I/O and Memory space resources. */
  98         struct resource                 io_space;
  99         struct resource                 mem_space;
 100         struct resource                 mem64_space;
 101         struct resource                 busn;
 102         /* offset */
 103         resource_size_t                 io_offset;
 104         resource_size_t                 mem_offset;
 105         resource_size_t                 mem64_offset;
 106
 107         /* Base of PCI Config space, can be per-PBM or shared. */
 108         unsigned long                   config_space;
 109
 110         /* This will be 12 on PCI-E controllers, 8 elsewhere.  */
 111         unsigned long                   config_space_reg_bits;
 112
 113         unsigned long                   pci_afsr;
 114         unsigned long                   pci_afar;
 115         unsigned long                   pci_csr;
 116
 117         /* State of 66MHz capabilities on this PBM. */
 118         int                             is_66mhz_capable;
 119         int                             all_devs_66mhz;
 120
 121 #ifdef CONFIG_PCI_MSI
 122         /* MSI info.  */
 123         u32                             msiq_num;
 124         u32                             msiq_ent_count;
 125         u32                             msiq_first;
 126         u32                             msiq_first_devino;
 127         u32                             msiq_rotor;
 128         struct sparc64_msiq_cookie      *msiq_irq_cookies;
 129         u32                             msi_num;
 130         u32                             msi_first;
 131         u32                             msi_data_mask;
 132         u32                             msix_data_width;
 133         u64                             msi32_start;
 134         u64                             msi64_start;
 135         u32                             msi32_len;
 136         u32                             msi64_len;
 137         void                            *msi_queues;
 138         unsigned long                   *msi_bitmap;
 139         unsigned int                    *msi_irq_table;
 140         int (*setup_msi_irq)(unsigned int *irq_p, struct pci_dev *pdev,
 141                              struct msi_desc *entry);
 142         void (*teardown_msi_irq)(unsigned int irq, struct pci_dev *pdev);
 143         const struct sparc64_msiq_ops   *msi_ops;
 144 #endif /* !(CONFIG_PCI_MSI) */
 145
 146         /* This PBM's streaming buffer. */
 147         struct strbuf                   stc;
 148
 149         /* IOMMU state, potentially shared by both PBM segments. */
 150         struct iommu                    *iommu;
 151
 152         /* Now things for the actual PCI bus probes. */
 153         unsigned int                    pci_first_busno;
 154         unsigned int                    pci_last_busno;
 155         struct pci_bus                  *pci_bus;
 156         struct pci_ops                  *pci_ops;
 157
 158         int                             numa_node;
 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 void pci_get_pbm_props(struct pci_pbm_info *pbm);
 167 struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 168                                  struct device *parent);
 169 void pci_determine_mem_io_space(struct pci_pbm_info *pbm);
 170
 171 /* Error reporting support. */
 172 void pci_scan_for_target_abort(struct pci_pbm_info *, struct pci_bus *);
 173 void pci_scan_for_master_abort(struct pci_pbm_info *, struct pci_bus *);
 174 void pci_scan_for_parity_error(struct pci_pbm_info *, struct pci_bus *);
 175
 176 /* Configuration space access. */
 177 void pci_config_read8(u8 *addr, u8 *ret);
 178 void pci_config_read16(u16 *addr, u16 *ret);
 179 void pci_config_read32(u32 *addr, u32 *ret);
 180 void pci_config_write8(u8 *addr, u8 val);
 181 void pci_config_write16(u16 *addr, u16 val);
 182 void pci_config_write32(u32 *addr, u32 val);
 183
 184 extern struct pci_ops sun4u_pci_ops;
 185 extern struct pci_ops sun4v_pci_ops;
 186
 187 extern volatile int pci_poke_in_progress;
 188 extern volatile int pci_poke_cpu;
 189 extern volatile int pci_poke_faulted;
 190
 191 #endif /* !(PCI_IMPL_H) */