pbm.h
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- /* $Id: pbm.h,v 1.27 2001/08/12 13:18:23 davem Exp $
- * pbm.h: UltraSparc PCI controller software state.
- *
- * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
- */
- #ifndef __SPARC64_PBM_H
- #define __SPARC64_PBM_H
- #include <linux/types.h>
- #include <linux/pci.h>
- #include <linux/ioport.h>
- #include <linux/spinlock.h>
- #include <asm/io.h>
- #include <asm/page.h>
- #include <asm/oplib.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 PBM_LOGCLUSTERS 3
- #define PBM_NCLUSTERS (1 << PBM_LOGCLUSTERS)
- struct pci_controller_info;
- /* This contains the software state necessary to drive a PCI
- * controller's IOMMU.
- */
- struct pci_iommu {
- /* This protects the controller's IOMMU and all
- * streaming buffers underneath.
- */
- spinlock_t lock;
- /* Context allocator. */
- unsigned int iommu_cur_ctx;
- /* IOMMU page table, a linear array of ioptes. */
- iopte_t *page_table; /* The page table itself. */
- int page_table_sz_bits; /* log2 of ow many pages does it map? */
- /* Base PCI memory space address where IOMMU mappings
- * begin.
- */
- u32 page_table_map_base;
- /* IOMMU Controller Registers */
- unsigned long iommu_control; /* IOMMU control register */
- unsigned long iommu_tsbbase; /* IOMMU page table base register */
- unsigned long iommu_flush; /* IOMMU page flush register */
- unsigned long iommu_ctxflush; /* IOMMU context flush register */
- /* This is a register in the PCI controller, which if
- * read will have no side-effects but will guarentee
- * completion of all previous writes into IOMMU/STC.
- */
- unsigned long write_complete_reg;
- /* The lowest used consistent mapping entry. Since
- * we allocate consistent maps out of cluster 0 this
- * is relative to the beginning of closter 0.
- */
- u32 lowest_consistent_map;
- /* If PBM_NCLUSTERS is ever decreased to 4 or lower,
- * or if largest supported page_table_sz * 8K goes above
- * 2GB, you must increase the size of the type of
- * these counters. You have been duly warned. -DaveM
- */
- struct {
- u16 next;
- u16 flush;
- } alloc_info[PBM_NCLUSTERS];
- /* Here a PCI controller driver describes the areas of
- * PCI memory space where DMA to/from physical memory
- * are addressed. Drivers interrogate the PCI layer
- * if their device has addressing limitations. They
- * do so via pci_dma_supported, and pass in a mask of
- * DMA address bits their device can actually drive.
- *
- * The test for being usable is:
- * (device_mask & dma_addr_mask) == dma_addr_mask
- */
- u32 dma_addr_mask;
- };
- /* This describes a PCI bus module's streaming buffer. */
- struct pci_strbuf {
- int strbuf_enabled; /* Present and using it? */
- /* Streaming Buffer Control Registers */
- unsigned long strbuf_control; /* STC control register */
- unsigned long strbuf_pflush; /* STC page flush register */
- unsigned long strbuf_fsync; /* STC flush synchronization reg */
- unsigned long strbuf_ctxflush; /* STC context flush register */
- unsigned long strbuf_ctxmatch_base; /* STC context flush match reg */
- unsigned long strbuf_flushflag_pa; /* Physical address of flush flag */
- volatile unsigned long *strbuf_flushflag; /* The flush flag itself */
- /* And this is the actual flush flag area.
- * We allocate extra because the chips require
- * a 64-byte aligned area.
- */
- volatile unsigned long __flushflag_buf[(64 + (64 - 1)) / sizeof(long)];
- };
- #define PCI_STC_FLUSHFLAG_INIT(STC)
- (*((STC)->strbuf_flushflag) = 0UL)
- #define PCI_STC_FLUSHFLAG_SET(STC)
- (*((STC)->strbuf_flushflag) != 0UL)
- /* There can be quite a few ranges and interrupt maps on a PCI
- * segment. Thus...
- */
- #define PROM_PCIRNG_MAX 64
- #define PROM_PCIIMAP_MAX 64
- struct pci_pbm_info {
- /* PCI controller we sit under. */
- struct pci_controller_info *parent;
- /* Name used for top-level resources. */
- char name[64];
- /* OBP specific information. */
- int prom_node;
- char prom_name[64];
- struct linux_prom_pci_ranges pbm_ranges[PROM_PCIRNG_MAX];
- int num_pbm_ranges;
- struct linux_prom_pci_intmap pbm_intmap[PROM_PCIIMAP_MAX];
- int num_pbm_intmap;
- struct linux_prom_pci_intmask pbm_intmask;
- /* PBM I/O and Memory space resources. */
- struct resource io_space;
- struct resource mem_space;
- /* Base of PCI Config space, can be per-PBM or shared. */
- unsigned long config_space;
- /* State of 66MHz capabilities on this PBM. */
- int is_66mhz_capable;
- int all_devs_66mhz;
- /* This PBM's streaming buffer. */
- struct pci_strbuf stc;
- /* IOMMU state, potentially shared by both PBM segments. */
- struct pci_iommu *iommu;
- /* PCI slot mapping. */
- unsigned int pci_first_slot;
- /* 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_controller_info {
- /* List of all PCI controllers. */
- struct pci_controller_info *next;
- /* Physical address base of controller registers. */
- unsigned long controller_regs;
- /* Opaque 32-bit system bus Port ID. */
- u32 portid;
- /* Each controller gets a unique index, used mostly for
- * error logging purposes.
- */
- int index;
- /* Do the PBMs both exist in the same PCI domain? */
- int pbms_same_domain;
- /* The PCI bus modules controlled by us. */
- struct pci_pbm_info pbm_A;
- struct pci_pbm_info pbm_B;
- /* Operations which are controller specific. */
- void (*scan_bus)(struct pci_controller_info *);
- unsigned int (*irq_build)(struct pci_pbm_info *, struct pci_dev *, unsigned int);
- void (*base_address_update)(struct pci_dev *, int);
- void (*resource_adjust)(struct pci_dev *, struct resource *, struct resource *);
- /* Now things for the actual PCI bus probes. */
- struct pci_ops *pci_ops;
- unsigned int pci_first_busno;
- unsigned int pci_last_busno;
- void *starfire_cookie;
- };
- /* PCI devices which are not bridges have this placed in their pci_dev
- * sysdata member. This makes OBP aware PCI device drivers easier to
- * code.
- */
- struct pcidev_cookie {
- struct pci_pbm_info *pbm;
- char prom_name[64];
- int prom_node;
- struct linux_prom_pci_registers prom_regs[PROMREG_MAX];
- int num_prom_regs;
- struct linux_prom_pci_registers prom_assignments[PROMREG_MAX];
- int num_prom_assignments;
- };
- /* Currently these are the same across all PCI controllers
- * we support. Someday they may not be...
- */
- #define PCI_IRQ_IGN 0x000007c0 /* Interrupt Group Number */
- #define PCI_IRQ_INO 0x0000003f /* Interrupt Number */
- #endif /* !(__SPARC64_PBM_H) */