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/* $OpenBSD: agpvar.h,v 1.27 2013/04/14 19:04:37 kettenis Exp $ */
/* $NetBSD: agpvar.h,v 1.4 2001/10/01 21:54:48 fvdl Exp $ */
/*-
* Copyright (c) 2000 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/pci/agppriv.h,v 1.3 2000/07/12 10:13:04 dfr Exp $
*/
#ifndef _PCI_AGPVAR_H_
#define _PCI_AGPVAR_H_
#include <sys/rwlock.h>
/* #define AGP_DEBUG */
#ifdef AGP_DEBUG
#define AGP_DPF(fmt, arg...) do { printf("agp: " fmt ,##arg); } while (0)
#else
#define AGP_DPF(fmt, arg...) do {} while (0)
#endif
#define AGPUNIT(x) minor(x)
/* we can't use the BUS_DMA_NOCACHE here or it won't get mapped via the gtt */
#define BUS_DMA_GTT_NOCACHE (1 << 30)
#define BUS_DMA_GTT_CACHE_LLC (1 << 29)
#define BUS_DMA_GTT_CACHE_LLC_MLC (1 << 28)
#define BUS_DMA_GTT_WRAPAROUND (1 << 27)
struct agp_attach_args {
char *aa_busname;
struct pci_attach_args *aa_pa;
};
struct agpbus_attach_args {
char *aa_busname; /*so pci doesn't conflict*/
struct pci_attach_args *aa_pa;
const struct agp_methods *aa_methods;
bus_addr_t aa_apaddr;
bus_size_t aa_apsize;
};
enum agp_acquire_state {
AGP_ACQUIRE_FREE,
AGP_ACQUIRE_USER,
AGP_ACQUIRE_KERNEL
};
/*
* Data structure to describe an AGP memory allocation.
*/
TAILQ_HEAD(agp_memory_list, agp_memory);
struct agp_memory {
TAILQ_ENTRY(agp_memory) am_link; /* wiring for the tailq */
bus_dmamap_t am_dmamap;
bus_dma_segment_t *am_dmaseg;
bus_size_t am_size; /* number of bytes allocated */
bus_size_t am_offset; /* page offset if bound */
paddr_t am_physical;
caddr_t am_kva; /* kva if mapped */
u_int32_t am_mapref; /* mapping reference count */
int am_id; /* unique id for block */
int am_is_bound; /* non-zero if bound */
int am_nseg;
int am_type; /* chipset specific type */
};
/*
* This structure is used to query the state of the AGP system.
*/
struct agp_info {
u_int32_t ai_mode;
bus_addr_t ai_aperture_base;
bus_size_t ai_aperture_size;
vsize_t ai_memory_allowed;
vsize_t ai_memory_used;
u_int32_t ai_devid;
};
struct agp_memory_info {
vsize_t ami_size; /* size in bytes */
bus_addr_t ami_physical; /* bogus hack for i810 */
off_t ami_offset; /* page offset if bound */
int ami_is_bound; /* non-zero if bound */
};
struct agp_methods {
void (*bind_page)(void *, bus_addr_t, paddr_t, int);
void (*unbind_page)(void *, bus_addr_t);
void (*flush_tlb)(void *);
void (*dma_sync)(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
bus_size_t, int);
int (*enable)(void *, u_int32_t mode);
struct agp_memory *
(*alloc_memory)(void *, int, vsize_t);
int (*free_memory)(void *, struct agp_memory *);
int (*bind_memory)(void *, struct agp_memory *, bus_size_t);
int (*unbind_memory)(void *, struct agp_memory *);
};
/*
* All chipset drivers must have this at the start of their softc.
*/
struct agp_softc {
struct device sc_dev;
struct agp_memory_list sc_memory; /* mem blocks */
struct rwlock sc_lock; /* GATT access lock */
const struct agp_methods *sc_methods; /* callbacks */
void *sc_chipc; /* chipset softc */
bus_dma_tag_t sc_dmat;
bus_space_tag_t sc_memt;
pci_chipset_tag_t sc_pc;
pcitag_t sc_pcitag;
bus_addr_t sc_apaddr;
bus_size_t sc_apsize;
uint32_t sc_stolen_entries;
pcireg_t sc_id;
int sc_opened;
int sc_capoff;
int sc_nextid; /* next mem block id */
enum agp_acquire_state sc_state;
u_int32_t sc_maxmem; /* mem upper bound */
u_int32_t sc_allocated; /* amount allocated */
};
struct agp_gatt {
u_int32_t ag_entries;
u_int32_t *ag_virtual;
bus_addr_t ag_physical;
bus_dmamap_t ag_dmamap;
bus_dma_segment_t ag_dmaseg;
size_t ag_size;
};
struct agp_map;
/*
* Functions private to the AGP code.
*/
struct device *agp_attach_bus(struct pci_attach_args *,
const struct agp_methods *, bus_addr_t, bus_size_t,
struct device *);
struct agp_gatt *
agp_alloc_gatt(bus_dma_tag_t, u_int32_t);
void agp_free_gatt(bus_dma_tag_t, struct agp_gatt *);
void agp_flush_cache(void);
void agp_flush_cache_range(vaddr_t, vsize_t);
int agp_generic_bind_memory(struct agp_softc *, struct agp_memory *,
bus_size_t);
int agp_generic_unbind_memory(struct agp_softc *, struct agp_memory *);
int agp_init_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, struct
agp_map **);
void agp_destroy_map(struct agp_map *);
int agp_map_subregion(struct agp_map *, bus_size_t, bus_size_t,
bus_space_handle_t *);
void agp_unmap_subregion(struct agp_map *, bus_space_handle_t,
bus_size_t);
int agp_alloc_dmamem(bus_dma_tag_t, size_t, bus_dmamap_t *,
bus_addr_t *, bus_dma_segment_t *);
void agp_free_dmamem(bus_dma_tag_t, size_t, bus_dmamap_t,
bus_dma_segment_t *);
int agpdev_print(void *, const char *);
int agpbus_probe(struct agp_attach_args *aa);
int agp_bus_dma_init(struct agp_softc *, bus_addr_t, bus_addr_t,
bus_dma_tag_t *);
void agp_bus_dma_destroy(struct agp_softc *, bus_dma_tag_t);
void agp_bus_dma_set_alignment(bus_dma_tag_t, bus_dmamap_t,
u_long);
void agp_bus_dma_rebind(bus_dma_tag_t, bus_dmamap_t, int);
void *agp_map(struct agp_softc *, bus_addr_t, bus_size_t,
bus_space_handle_t *);
void agp_unmap(struct agp_softc *, void *, size_t, bus_space_handle_t);
paddr_t agp_mmap(struct agp_softc *, off_t, int);
/*
* Kernel API
*/
/*
* Find the AGP device and return it.
*/
void *agp_find_device(int);
/*
* Return the current owner of the AGP chipset.
*/
enum agp_acquire_state agp_state(void *);
/*
* Query the state of the AGP system.
*/
void agp_get_info(void *, struct agp_info *);
/*
* Acquire the AGP chipset for use by the kernel. Returns EBUSY if the
* AGP chipset is already acquired by another user.
*/
int agp_acquire(void *);
/*
* Release the AGP chipset.
*/
int agp_release(void *);
/*
* Enable the agp hardware with the relavent mode. The mode bits are
* defined in <dev/pci/agpreg.h>
*/
int agp_enable(void *, u_int32_t);
/*
* Allocate physical memory suitable for mapping into the AGP
* aperture. The value returned is an opaque handle which can be
* passed to agp_bind(), agp_unbind() or agp_deallocate().
*/
void *agp_alloc_memory(void *, int, vsize_t);
/*
* Free memory which was allocated with agp_allocate().
*/
void agp_free_memory(void *, void *);
/*
* Bind memory allocated with agp_allocate() at a given offset within
* the AGP aperture. Returns EINVAL if the memory is already bound or
* the offset is not at an AGP page boundary.
*/
int agp_bind_memory(void *, void *, off_t);
/*
* Unbind memory from the AGP aperture. Returns EINVAL if the memory
* is not bound.
*/
int agp_unbind_memory(void *, void *);
/*
* Retrieve information about a memory block allocated with
* agp_alloc_memory().
*/
void agp_memory_info(void *, void *, struct agp_memory_info *);
#endif /* !_PCI_AGPVAR_H_ */
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