OpenBSD-4.6/sys/dev/pci/agp_ali.c
/* $OpenBSD: agp_ali.c,v 1.10 2009/05/10 16:57:44 oga Exp $ */
/* $NetBSD: agp_ali.c,v 1.2 2001/09/15 00:25:00 thorpej 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/agp_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/lock.h>
#include <sys/agpio.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/vga_pcivar.h>
#include <dev/pci/agpvar.h>
#include <dev/pci/agpreg.h>
#include <machine/bus.h>
struct agp_ali_softc {
struct device dev;
struct agp_softc *agpdev;
struct agp_gatt *gatt;
pci_chipset_tag_t asc_pc;
pcitag_t asc_tag;
bus_addr_t asc_apaddr;
bus_size_t asc_apsize;
};
void agp_ali_attach(struct device *, struct device *, void *);
int agp_ali_probe(struct device *, void *, void *);
bus_size_t agp_ali_get_aperture(void *);
int agp_ali_set_aperture(void *sc, bus_size_t);
void agp_ali_bind_page(void *, bus_addr_t, paddr_t, int);
void agp_ali_unbind_page(void *, bus_addr_t);
void agp_ali_flush_tlb(void *);
struct cfattach aliagp_ca = {
sizeof(struct agp_ali_softc), agp_ali_probe, agp_ali_attach
};
struct cfdriver aliagp_cd = {
NULL, "aliagp", DV_DULL
};
const struct agp_methods agp_ali_methods = {
agp_ali_bind_page,
agp_ali_unbind_page,
agp_ali_flush_tlb,
};
int
agp_ali_probe(struct device *parent, void *match, void *aux)
{
struct agp_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
/* Must be a pchb, don't attach to iommu-style agp devs */
if (agpbus_probe(aa) == 1 && PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ALI &&
PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_ALI_M1689)
return (1);
return (0);
}
void
agp_ali_attach(struct device *parent, struct device *self, void *aux)
{
struct agp_ali_softc *asc = (struct agp_ali_softc *)self;
struct agp_gatt *gatt;
struct agp_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
pcireg_t reg;
asc->asc_tag = pa->pa_tag;
asc->asc_pc = pa->pa_pc;
asc->asc_apsize = agp_ali_get_aperture(asc);
if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, AGP_APBASE,
PCI_MAPREG_TYPE_MEM, &asc->asc_apaddr, NULL, NULL) != 0) {
printf(": can't get aperture info\n");
return;
}
for (;;) {
gatt = agp_alloc_gatt(pa->pa_dmat, asc->asc_apsize);
if (gatt != NULL)
break;
/*
* almost certainly error allocating contigious dma memory
* so reduce aperture so that the gatt size reduces.
*/
asc->asc_apsize /= 2;
if (agp_ali_set_aperture(asc, asc->asc_apsize)) {
printf("failed to set aperture\n");
return;
}
}
asc->gatt = gatt;
/* Install the gatt. */
reg = pci_conf_read(asc->asc_pc, asc->asc_tag, AGP_ALI_ATTBASE);
reg = (reg & 0xff) | gatt->ag_physical;
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_ATTBASE, reg);
/* Enable the TLB. */
reg = pci_conf_read(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL);
reg = (reg & ~0xff) | 0x10;
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL, reg);
asc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_ali_methods,
asc->asc_apaddr, asc->asc_apsize, &asc->dev);
return;
}
#if 0
int
agp_ali_detach(struct agp_softc *sc)
{
int error;
pcireg_t reg;
struct agp_ali_softc *asc = sc->sc_chipc;
error = agp_generic_detach(sc);
if (error)
return (error);
/* Disable the TLB.. */
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL);
reg &= ~0xff;
reg |= 0x90;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg);
/* Put the aperture back the way it started. */
AGP_SET_APERTURE(sc, asc->initial_aperture);
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE);
reg &= 0xff;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg);
agp_free_gatt(sc, asc->gatt);
return (0);
}
#endif
#define M 1024*1024
static const u_int32_t agp_ali_table[] = {
0, /* 0 - invalid */
1, /* 1 - invalid */
2, /* 2 - invalid */
4*M, /* 3 - invalid */
8*M, /* 4 - invalid */
0, /* 5 - invalid */
16*M, /* 6 - invalid */
32*M, /* 7 - invalid */
64*M, /* 8 - invalid */
128*M, /* 9 - invalid */
256*M, /* 10 - invalid */
};
#define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
bus_size_t
agp_ali_get_aperture(void *sc)
{
struct agp_ali_softc *asc = sc;
int i;
/*
* The aperture size is derived from the low bits of attbase.
* I'm not sure this is correct..
*/
i = (int)pci_conf_read(asc->asc_pc, asc->asc_tag,
AGP_ALI_ATTBASE) & 0xff;
if (i >= agp_ali_table_size)
return (0);
return (agp_ali_table[i]);
}
int
agp_ali_set_aperture(void *sc, bus_size_t aperture)
{
struct agp_ali_softc *asc = sc;
int i;
pcireg_t reg;
for (i = 0; i < agp_ali_table_size; i++)
if (agp_ali_table[i] == aperture)
break;
if (i == agp_ali_table_size)
return (EINVAL);
reg = pci_conf_read(asc->asc_pc, asc->asc_tag, AGP_ALI_ATTBASE);
reg &= ~0xff;
reg |= i;
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_ATTBASE, reg);
return (0);
}
void
agp_ali_bind_page(void *sc, bus_addr_t offset, paddr_t physical, int flags)
{
struct agp_ali_softc *asc = sc;
asc->gatt->ag_virtual[(offset - asc->asc_apaddr) >> AGP_PAGE_SHIFT] =
physical;
}
void
agp_ali_unbind_page(void *sc, bus_size_t offset)
{
struct agp_ali_softc *asc = sc;
asc->gatt->ag_virtual[(offset - asc->asc_apaddr) >> AGP_PAGE_SHIFT] = 0;
}
void
agp_ali_flush_tlb(void *sc)
{
struct agp_ali_softc *asc = sc;
pcireg_t reg;
reg = pci_conf_read(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL);
reg &= ~0xff;
reg |= 0x90;
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL, reg);
reg &= ~0xff;
reg |= 0x10;
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL, reg);
}