diff options
Diffstat (limited to 'arch/sparc/kernel/pci_impl.h')
| -rw-r--r-- | arch/sparc/kernel/pci_impl.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/arch/sparc/kernel/pci_impl.h b/arch/sparc/kernel/pci_impl.h new file mode 100644 index 000000000..4e3d15189 --- /dev/null +++ b/arch/sparc/kernel/pci_impl.h @@ -0,0 +1,192 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* pci_impl.h: Helper definitions for PCI controller support. + * + * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net) + */ + +#ifndef PCI_IMPL_H +#define PCI_IMPL_H + +#include <linux/types.h> +#include <linux/spinlock.h> +#include <linux/pci.h> +#include <linux/msi.h> +#include <linux/of_device.h> +#include <asm/io.h> +#include <asm/prom.h> +#include <asm/iommu.h> + +/* The abstraction used here is that there are PCI controllers, + * each with one (Sabre) or two (PSYCHO/SCHIZO) PCI bus modules + * underneath. Each PCI bus module uses an IOMMU (shared by both + * PBMs of a controller, or per-PBM), and if a streaming buffer + * is present, each PCI bus module has it's own. (ie. the IOMMU + * might be shared between PBMs, the STC is never shared) + * Furthermore, each PCI bus module controls it's own autonomous + * PCI bus. + */ + +#define PCI_STC_FLUSHFLAG_INIT(STC) \ + (*((STC)->strbuf_flushflag) = 0UL) +#define PCI_STC_FLUSHFLAG_SET(STC) \ + (*((STC)->strbuf_flushflag) != 0UL) + +#ifdef CONFIG_PCI_MSI +struct pci_pbm_info; +struct sparc64_msiq_ops { + int (*get_head)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long *head); + int (*dequeue_msi)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long *head, unsigned long *msi); + int (*set_head)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long head); + int (*msi_setup)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long msi, int is_msi64); + int (*msi_teardown)(struct pci_pbm_info *pbm, unsigned long msi); + int (*msiq_alloc)(struct pci_pbm_info *pbm); + void (*msiq_free)(struct pci_pbm_info *pbm); + int (*msiq_build_irq)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long devino); +}; + +void sparc64_pbm_msi_init(struct pci_pbm_info *pbm, + const struct sparc64_msiq_ops *ops); + +struct sparc64_msiq_cookie { + struct pci_pbm_info *pbm; + unsigned long msiqid; +}; +#endif + +struct pci_pbm_info { + struct pci_pbm_info *next; + struct pci_pbm_info *sibling; + int index; + + /* Physical address base of controller registers. */ + unsigned long controller_regs; + + /* Physical address base of PBM registers. */ + unsigned long pbm_regs; + + /* Physical address of DMA sync register, if any. */ + unsigned long sync_reg; + + /* Opaque 32-bit system bus Port ID. */ + u32 portid; + + /* Opaque 32-bit handle used for hypervisor calls. */ + u32 devhandle; + + /* Chipset version information. */ + int chip_type; +#define PBM_CHIP_TYPE_SABRE 1 +#define PBM_CHIP_TYPE_PSYCHO 2 +#define PBM_CHIP_TYPE_SCHIZO 3 +#define PBM_CHIP_TYPE_SCHIZO_PLUS 4 +#define PBM_CHIP_TYPE_TOMATILLO 5 + int chip_version; + int chip_revision; + + /* Name used for top-level resources. */ + const char *name; + + /* OBP specific information. */ + struct platform_device *op; + u64 ino_bitmap; + + /* PBM I/O and Memory space resources. */ + struct resource io_space; + struct resource mem_space; + struct resource mem64_space; + struct resource busn; + /* offset */ + resource_size_t io_offset; + resource_size_t mem_offset; + resource_size_t mem64_offset; + + /* Base of PCI Config space, can be per-PBM or shared. */ + unsigned long config_space; + + /* This will be 12 on PCI-E controllers, 8 elsewhere. */ + unsigned long config_space_reg_bits; + + unsigned long pci_afsr; + unsigned long pci_afar; + unsigned long pci_csr; + + /* State of 66MHz capabilities on this PBM. */ + int is_66mhz_capable; + int all_devs_66mhz; + +#ifdef CONFIG_PCI_MSI + /* MSI info. */ + u32 msiq_num; + u32 msiq_ent_count; + u32 msiq_first; + u32 msiq_first_devino; + u32 msiq_rotor; + struct sparc64_msiq_cookie *msiq_irq_cookies; + u32 msi_num; + u32 msi_first; + u32 msi_data_mask; + u32 msix_data_width; + u64 msi32_start; + u64 msi64_start; + u32 msi32_len; + u32 msi64_len; + void *msi_queues; + unsigned long *msi_bitmap; + unsigned int *msi_irq_table; + int (*setup_msi_irq)(unsigned int *irq_p, struct pci_dev *pdev, + struct msi_desc *entry); + void (*teardown_msi_irq)(unsigned int irq, struct pci_dev *pdev); + const struct sparc64_msiq_ops *msi_ops; +#endif /* !(CONFIG_PCI_MSI) */ + + /* This PBM's streaming buffer. */ + struct strbuf stc; + + /* IOMMU state, potentially shared by both PBM segments. */ + struct iommu *iommu; + + /* Now things for the actual PCI bus probes. */ + unsigned int pci_first_busno; + unsigned int pci_last_busno; + struct pci_bus *pci_bus; + struct pci_ops *pci_ops; + + int numa_node; +}; + +extern struct pci_pbm_info *pci_pbm_root; + +extern int pci_num_pbms; + +/* PCI bus scanning and fixup support. */ +void pci_get_pbm_props(struct pci_pbm_info *pbm); +struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, + struct device *parent); +void pci_determine_mem_io_space(struct pci_pbm_info *pbm); + +/* Error reporting support. */ +void pci_scan_for_target_abort(struct pci_pbm_info *, struct pci_bus *); +void pci_scan_for_master_abort(struct pci_pbm_info *, struct pci_bus *); +void pci_scan_for_parity_error(struct pci_pbm_info *, struct pci_bus *); + +/* Configuration space access. */ +void pci_config_read8(u8 *addr, u8 *ret); +void pci_config_read16(u16 *addr, u16 *ret); +void pci_config_read32(u32 *addr, u32 *ret); +void pci_config_write8(u8 *addr, u8 val); +void pci_config_write16(u16 *addr, u16 val); +void pci_config_write32(u32 *addr, u32 val); + +extern struct pci_ops sun4u_pci_ops; +extern struct pci_ops sun4v_pci_ops; + +extern volatile int pci_poke_in_progress; +extern volatile int pci_poke_cpu; +extern volatile int pci_poke_faulted; + +#endif /* !(PCI_IMPL_H) */ |