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 <linux/of_device.h>
  15 #include <asm/io.h>
  16 #include <asm/prom.h>
  17 #include <asm/iommu.h>
  18
  19 /* The abstraction used here is that there are PCI controllers,
  20  * each with one (Sabre) or two (PSYCHO/SCHIZO) PCI bus modules
  21  * underneath.  Each PCI bus module uses an IOMMU (shared by both
  22  * PBMs of a controller, or per-PBM), and if a streaming buffer
  23  * is present, each PCI bus module has it's own. (ie. the IOMMU
  24  * might be shared between PBMs, the STC is never shared)
  25  * Furthermore, each PCI bus module controls it's own autonomous
  26  * PCI bus.
  27  */
  28
  29 #define PCI_STC_FLUSHFLAG_INIT(STC) \
  30         (*((STC)->strbuf_flushflag) = 0UL)
  31 #define PCI_STC_FLUSHFLAG_SET(STC) \
  32         (*((STC)->strbuf_flushflag) != 0UL)
  33
  34 #ifdef CONFIG_PCI_MSI
  35 struct pci_pbm_info;
  36 struct sparc64_msiq_ops {
  37         int (*get_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
  38                         unsigned long *head);
  39         int (*dequeue_msi)(struct pci_pbm_info *pbm, unsigned long msiqid,
  40                            unsigned long *head, unsigned long *msi);
  41         int (*set_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
  42                         unsigned long head);
  43         int (*msi_setup)(struct pci_pbm_info *pbm, unsigned long msiqid,
  44                          unsigned long msi, int is_msi64);
  45         int (*msi_teardown)(struct pci_pbm_info *pbm, unsigned long msi);
  46         int (*msiq_alloc)(struct pci_pbm_info *pbm);
  47         void (*msiq_free)(struct pci_pbm_info *pbm);
  48         int (*msiq_build_irq)(struct pci_pbm_info *pbm, unsigned long msiqid,
  49                               unsigned long devino);
  50 };
  51
  52 void sparc64_pbm_msi_init(struct pci_pbm_info *pbm,
  53                           const struct sparc64_msiq_ops *ops);
  54
  55 struct sparc64_msiq_cookie {
  56         struct pci_pbm_info *pbm;
  57         unsigned long msiqid;
  58 };
  59 #endif
  60
  61 struct pci_pbm_info {
  62         struct pci_pbm_info             *next;
  63         struct pci_pbm_info             *sibling;
  64         int                             index;
  65
  66         /* Physical address base of controller registers. */
  67         unsigned long                   controller_regs;
  68
  69         /* Physical address base of PBM registers. */
  70         unsigned long                   pbm_regs;
  71
  72         /* Physical address of DMA sync register, if any.  */
  73         unsigned long                   sync_reg;
  74
  75         /* Opaque 32-bit system bus Port ID. */
  76         u32                             portid;
  77
  78         /* Opaque 32-bit handle used for hypervisor calls.  */
  79         u32                             devhandle;
  80
  81         /* Chipset version information. */
  82         int                             chip_type;
  83 #define PBM_CHIP_TYPE_SABRE             1
  84 #define PBM_CHIP_TYPE_PSYCHO            2
  85 #define PBM_CHIP_TYPE_SCHIZO            3
  86 #define PBM_CHIP_TYPE_SCHIZO_PLUS       4
  87 #define PBM_CHIP_TYPE_TOMATILLO         5
  88         int                             chip_version;
  89         int                             chip_revision;
  90
  91         /* Name used for top-level resources. */
  92         const char                      *name;
  93
  94         /* OBP specific information. */
  95         struct platform_device          *op;
  96         u64                             ino_bitmap;
  97
  98         /* PBM I/O and Memory space resources. */
  99         struct resource                 io_space;
 100         struct resource                 mem_space;
 101         struct resource                 mem64_space;
 102         struct resource                 busn;
 103         /* offset */
 104         resource_size_t                 io_offset;
 105         resource_size_t                 mem_offset;
 106         resource_size_t                 mem64_offset;
 107
 108         /* Base of PCI Config space, can be per-PBM or shared. */
 109         unsigned long                   config_space;
 110
 111         /* This will be 12 on PCI-E controllers, 8 elsewhere.  */
 112         unsigned long                   config_space_reg_bits;
 113
 114         unsigned long                   pci_afsr;
 115         unsigned long                   pci_afar;
 116         unsigned long                   pci_csr;
 117
 118         /* State of 66MHz capabilities on this PBM. */
 119         int                             is_66mhz_capable;
 120         int                             all_devs_66mhz;
 121
 122 #ifdef CONFIG_PCI_MSI
 123         /* MSI info.  */
 124         u32                             msiq_num;
 125         u32                             msiq_ent_count;
 126         u32                             msiq_first;
 127         u32                             msiq_first_devino;
 128         u32                             msiq_rotor;
 129         struct sparc64_msiq_cookie      *msiq_irq_cookies;
 130         u32                             msi_num;
 131         u32                             msi_first;
 132         u32                             msi_data_mask;
 133         u32                             msix_data_width;
 134         u64                             msi32_start;
 135         u64                             msi64_start;
 136         u32                             msi32_len;
 137         u32                             msi64_len;
 138         void                            *msi_queues;
 139         unsigned long                   *msi_bitmap;
 140         unsigned int                    *msi_irq_table;
 141         int (*setup_msi_irq)(unsigned int *irq_p, struct pci_dev *pdev,
 142                              struct msi_desc *entry);
 143         void (*teardown_msi_irq)(unsigned int irq, struct pci_dev *pdev);
 144         const struct sparc64_msiq_ops   *msi_ops;
 145 #endif /* !(CONFIG_PCI_MSI) */
 146
 147         /* This PBM's streaming buffer. */
 148         struct strbuf                   stc;
 149
 150         /* IOMMU state, potentially shared by both PBM segments. */
 151         struct iommu                    *iommu;
 152
 153         /* Now things for the actual PCI bus probes. */
 154         unsigned int                    pci_first_busno;
 155         unsigned int                    pci_last_busno;
 156         struct pci_bus                  *pci_bus;
 157         struct pci_ops                  *pci_ops;
 158
 159         int                             numa_node;
 160 };
 161
 162 extern struct pci_pbm_info *pci_pbm_root;
 163
 164 extern int pci_num_pbms;
 165
 166 /* PCI bus scanning and fixup support. */
 167 void pci_get_pbm_props(struct pci_pbm_info *pbm);
 168 struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 169                                  struct device *parent);
 170 void pci_determine_mem_io_space(struct pci_pbm_info *pbm);
 171
 172 /* Error reporting support. */
 173 void pci_scan_for_target_abort(struct pci_pbm_info *, struct pci_bus *);
 174 void pci_scan_for_master_abort(struct pci_pbm_info *, struct pci_bus *);
 175 void pci_scan_for_parity_error(struct pci_pbm_info *, struct pci_bus *);
 176
 177 /* Configuration space access. */
 178 void pci_config_read8(u8 *addr, u8 *ret);
 179 void pci_config_read16(u16 *addr, u16 *ret);
 180 void pci_config_read32(u32 *addr, u32 *ret);
 181 void pci_config_write8(u8 *addr, u8 val);
 182 void pci_config_write16(u16 *addr, u16 val);
 183 void pci_config_write32(u32 *addr, u32 val);
 184
 185 extern struct pci_ops sun4u_pci_ops;
 186 extern struct pci_ops sun4v_pci_ops;
 187
 188 extern volatile int pci_poke_in_progress;
 189 extern volatile int pci_poke_cpu;
 190 extern volatile int pci_poke_faulted;
 191
 192 #endif /* !(PCI_IMPL_H) */