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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>
#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 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;
/* 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 guarantee
* 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;
/* In order to deal with some buggy third-party PCI bridges that
* do wrong prefetching, we never mark valid mappings as invalid.
* Instead we point them at this dummy page.
*/
unsigned long dummy_page;
unsigned long dummy_page_pa;
/* 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];
/* CTX allocation. */
unsigned long ctx_lowest_free;
unsigned long ctx_bitmap[IOMMU_NUM_CTXS / (sizeof(unsigned long) * 8)];
/* 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;
};
extern void pci_iommu_table_init(struct pci_iommu *iommu, int tsbsize, u32 dma_offset, 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;
/* 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;
/* 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. */
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;
u64 ino_bitmap;
/* 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;
/* 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) */
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