include/asm-sparc64/pbm.h - maze/linux - Git at Google

 /* $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/prom.h>
 #include <asm/of_device.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.
  */

 struct pci_controller_info;

 /* This contains the software state necessary to drive a PCI
  * controller's IOMMU.
  */
 struct pci_iommu_arena {
 	unsigned long	*map;
 	unsigned int	hint;
 	unsigned int	limit;
 };

 struct pci_iommu {
 	/* This protects the controller's IOMMU and all
 	 * streaming buffers underneath.
 	 */
 	spinlock_t	lock;

 	struct pci_iommu_arena arena;

 	/* IOMMU page table, a linear array of ioptes. */
 	iopte_t		*page_table;		/* The page table itself. */

 	/* 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;

 	/* 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;

 	/* 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;

 	/* 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. */
 	char				*name;

 	/* OBP specific information. */
 	struct device_node		*prom_node;
 	struct linux_prom_pci_ranges	*pbm_ranges;
 	int				num_pbm_ranges;
 	struct linux_prom_pci_intmap	*pbm_intmap;
 	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 *);
 	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;
 };

 /* 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;
 	struct device_node		*prom_node;
 	struct of_device		*op;
 	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) */
	/* $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/prom.h>
	#include <asm/of_device.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.
	*/

	struct pci_controller_info;

	/* This contains the software state necessary to drive a PCI
	* controller's IOMMU.
	*/
	struct pci_iommu_arena {
	unsigned long *map;
	unsigned int hint;
	unsigned int limit;
	};

	struct pci_iommu {
	/* This protects the controller's IOMMU and all
	* streaming buffers underneath.
	*/
	spinlock_t lock;

	struct pci_iommu_arena arena;

	/* IOMMU page table, a linear array of ioptes. */
	iopte_t page_table; / The page table itself. */

	/* 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;

	/* 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;

	/* 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;

	/* 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. */
	char *name;

	/* OBP specific information. */
	struct device_node *prom_node;
	struct linux_prom_pci_ranges *pbm_ranges;
	int num_pbm_ranges;
	struct linux_prom_pci_intmap *pbm_intmap;
	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 );
	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;
	};

	/* 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;
	struct device_node *prom_node;
	struct of_device *op;
	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) */