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/* $OpenBSD: agp_ali.c,v 1.2 2002/07/25 23:31:04 fgsch 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/vga_pcivar.h>
#include <dev/pci/agpvar.h>
#include <dev/pci/agpreg.h>
#include <machine/bus.h>
struct agp_ali_softc {
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
};
u_int32_t agp_ali_get_aperture(struct vga_pci_softc *);
int agp_ali_set_aperture(struct vga_pci_softc *sc, u_int32_t);
int agp_ali_bind_page(struct vga_pci_softc *, off_t, bus_addr_t);
int agp_ali_unbind_page(struct vga_pci_softc *, off_t);
void agp_ali_flush_tlb(struct vga_pci_softc *);
struct agp_methods agp_ali_methods = {
agp_ali_get_aperture,
agp_ali_set_aperture,
agp_ali_bind_page,
agp_ali_unbind_page,
agp_ali_flush_tlb,
agp_generic_enable,
agp_generic_alloc_memory,
agp_generic_free_memory,
agp_generic_bind_memory,
agp_generic_unbind_memory,
};
int
agp_ali_attach(struct vga_pci_softc *sc, struct pci_attach_args *pa,
struct pci_attach_args *pchb_pa)
{
struct agp_ali_softc *asc;
struct agp_gatt *gatt;
pcireg_t reg;
asc = malloc(sizeof *asc, M_DEVBUF, M_NOWAIT);
if (asc == NULL) {
printf(": failed to allocate softc\n");
return (ENOMEM);
}
sc->sc_chipc = asc;
sc->sc_methods = &agp_ali_methods;
if (agp_map_aperture(sc) != 0) {
printf(": failed to map aperture\n");
free(asc, M_DEVBUF);
return (ENXIO);
}
asc->initial_aperture = agp_ali_get_aperture(sc);
for (;;) {
gatt = agp_alloc_gatt(sc);
if (gatt != NULL)
break;
/*
* Probably contigmalloc failure. Try reducing the
* aperture so that the gatt size reduces.
*/
if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) {
agp_generic_detach(sc);
printf(": failed to set aperture\n");
return (ENOMEM);
}
}
asc->gatt = gatt;
/* Install the gatt. */
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE);
reg = (reg & 0xff) | gatt->ag_physical;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg);
/* Enable the TLB. */
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL);
reg = (reg & ~0xff) | 0x10;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg);
return (0);
}
#if 0
int
agp_ali_detach(struct vga_pci_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]))
u_int32_t
agp_ali_get_aperture(struct vga_pci_softc *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(sc->sc_pc, sc->sc_pcitag,
AGP_ALI_ATTBASE) & 0xff;
if (i >= agp_ali_table_size)
return (0);
return (agp_ali_table[i]);
}
int
agp_ali_set_aperture(struct vga_pci_softc *sc, u_int32_t aperture)
{
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(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE);
reg &= ~0xff;
reg |= i;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg);
return (0);
}
int
agp_ali_bind_page(struct vga_pci_softc *sc, off_t offset, bus_addr_t physical)
{
struct agp_ali_softc *asc = sc->sc_chipc;
if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
return (EINVAL);
asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
return (0);
}
int
agp_ali_unbind_page(struct vga_pci_softc *sc, off_t offset)
{
struct agp_ali_softc *asc = sc->sc_chipc;
if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
return (EINVAL);
asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
return (0);
}
void
agp_ali_flush_tlb(struct vga_pci_softc *sc)
{
pcireg_t reg;
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);
reg &= ~0xff;
reg |= 0x10;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg);
}
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