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) */ 192