freebsd-nq/sys/dev/agp/agp_ati.c

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/*-
* Copyright (c) 2005 Eric Anholt
* 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.
*
* Based on reading the Linux 2.6.8.1 driver by Dave Jones.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_bus.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <dev/agp/agppriv.h>
#include <dev/agp/agpreg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
MALLOC_DECLARE(M_AGP);
#define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off)
#define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v)
struct agp_ati_softc {
struct agp_softc agp;
struct resource *regs; /* memory mapped control registers */
bus_space_tag_t bst; /* bus_space tag */
bus_space_handle_t bsh; /* bus_space handle */
u_int32_t initial_aperture; /* aperture size at startup */
char is_rs300;
/* The GATT */
u_int32_t ag_entries;
u_int32_t *ag_virtual; /* virtual address of gatt */
u_int32_t *ag_vdir; /* virtual address of page dir */
vm_offset_t ag_pdir; /* physical address of page dir */
};
static const char*
agp_ati_match(device_t dev)
{
if (pci_get_class(dev) != PCIC_BRIDGE ||
pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
return NULL;
if (agp_find_caps(dev) == 0)
return NULL;
switch (pci_get_devid(dev)) {
case 0xcab01002:
return ("ATI RS100 AGP bridge");
case 0xcab21002:
return ("ATI RS200 AGP bridge");
case 0xcbb21002:
return ("ATI RS200M AGP bridge");
case 0xcab31002:
return ("ATI RS250 AGP bridge");
case 0x58301002:
return ("ATI RS300_100 AGP bridge");
case 0x58311002:
return ("ATI RS300_133 AGP bridge");
case 0x58321002:
return ("ATI RS300_166 AGP bridge");
case 0x58331002:
return ("ATI RS300_200 AGP bridge");
};
return NULL;
}
static int
agp_ati_probe(device_t dev)
{
const char *desc;
desc = agp_ati_match(dev);
if (desc) {
device_set_desc(dev, desc);
return 0;
}
return ENXIO;
}
static int
agp_ati_alloc_gatt(device_t dev)
{
struct agp_ati_softc *sc = device_get_softc(dev);
u_int32_t apsize = AGP_GET_APERTURE(dev);
u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
u_int32_t apbase_offset;
int i;
/* Alloc the GATT -- pointers to pages of AGP memory */
sc->ag_entries = entries;
sc->ag_virtual = malloc(entries * sizeof(u_int32_t), M_AGP,
M_NOWAIT | M_ZERO);
if (sc->ag_virtual == NULL) {
if (bootverbose)
device_printf(dev, "aperture allocation failed\n");
return ENOMEM;
}
/* Alloc the page directory -- pointers to each page of the GATT */
sc->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO);
if (sc->ag_vdir == NULL) {
if (bootverbose)
device_printf(dev, "pagedir allocation failed\n");
free(sc->ag_virtual, M_AGP);
return ENOMEM;
}
sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir);
apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22;
/* Fill in the pagedir's pointers to GATT pages */
for (i = 0; i < sc->ag_entries / 1024; i++) {
vm_offset_t va;
vm_offset_t pa;
va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE;
pa = vtophys(va);
sc->ag_vdir[apbase_offset + i] = pa | 1;
}
/*
* Make sure the chipset can see everything.
*/
agp_flush_cache();
return 0;
}
static int
agp_ati_attach(device_t dev)
{
struct agp_ati_softc *sc = device_get_softc(dev);
int error, rid;
u_int32_t temp;
u_int32_t apsize_reg, agpmode_reg;
error = agp_generic_attach(dev);
if (error)
return error;
switch (pci_get_devid(dev)) {
case 0xcab01002: /* ATI RS100 AGP bridge */
case 0xcab21002: /* ATI RS200 AGP bridge */
case 0xcbb21002: /* ATI RS200M AGP bridge */
case 0xcab31002: /* ATI RS250 AGP bridge */
sc->is_rs300 = 0;
apsize_reg = ATI_RS100_APSIZE;
agpmode_reg = ATI_RS100_IG_AGPMODE;
break;
case 0x58301002: /* ATI RS300_100 AGP bridge */
case 0x58311002: /* ATI RS300_133 AGP bridge */
case 0x58321002: /* ATI RS300_166 AGP bridge */
case 0x58331002: /* ATI RS300_200 AGP bridge */
sc->is_rs300 = 1;
apsize_reg = ATI_RS300_APSIZE;
agpmode_reg = ATI_RS300_IG_AGPMODE;
break;
default:
/* Unknown chipset */
return EINVAL;
};
rid = ATI_GART_MMADDR;
sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (!sc->regs) {
agp_generic_detach(dev);
return ENOMEM;
}
sc->bst = rman_get_bustag(sc->regs);
sc->bsh = rman_get_bushandle(sc->regs);
sc->initial_aperture = AGP_GET_APERTURE(dev);
for (;;) {
if (agp_ati_alloc_gatt(dev) == 0)
break;
/*
* Probably contigmalloc failure. Try reducing the
* aperture so that the gatt size reduces.
*/
if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
return ENOMEM;
}
temp = pci_read_config(dev, apsize_reg, 4);
pci_write_config(dev, apsize_reg, temp | 1, 4);
pci_write_config(dev, agpmode_reg, 0x20000, 4);
WRITE4(ATI_GART_FEATURE_ID, 0x00060000);
temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */
pci_write_config(dev, 4, temp | (1 << 14), 4);
WRITE4(ATI_GART_BASE, sc->ag_pdir);
AGP_FLUSH_TLB(dev);
return 0;
}
static int
agp_ati_detach(device_t dev)
{
struct agp_ati_softc *sc = device_get_softc(dev);
u_int32_t apsize_reg, temp;
agp_free_cdev(dev);
if (sc->is_rs300)
apsize_reg = ATI_RS300_APSIZE;
else
apsize_reg = ATI_RS100_APSIZE;
/* Clear the GATT base */
WRITE4(ATI_GART_BASE, 0);
/* Put the aperture back the way it started. */
AGP_SET_APERTURE(dev, sc->initial_aperture);
temp = pci_read_config(dev, apsize_reg, 4);
pci_write_config(dev, apsize_reg, temp & ~1, 4);
free(sc->ag_vdir, M_AGP);
free(sc->ag_virtual, M_AGP);
bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs);
agp_free_res(dev);
return 0;
}
static u_int32_t
agp_ati_get_aperture(device_t dev)
{
struct agp_ati_softc *sc = device_get_softc(dev);
int size_value;
if (sc->is_rs300)
size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4);
else
size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4);
size_value = (size_value & 0x0000000e) >> 1;
size_value = (32 * 1024 * 1024) << size_value;
return size_value;
}
static int
agp_ati_set_aperture(device_t dev, u_int32_t aperture)
{
struct agp_ati_softc *sc = device_get_softc(dev);
int size_value;
u_int32_t apsize_reg;
if (sc->is_rs300)
apsize_reg = ATI_RS300_APSIZE;
else
apsize_reg = ATI_RS100_APSIZE;
size_value = pci_read_config(dev, apsize_reg, 4);
size_value &= ~0x0000000e;
size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1;
pci_write_config(dev, apsize_reg, size_value, 4);
return 0;
}
static int
agp_ati_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
{
struct agp_ati_softc *sc = device_get_softc(dev);
if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1;
return 0;
}
static int
agp_ati_unbind_page(device_t dev, vm_offset_t offset)
{
struct agp_ati_softc *sc = device_get_softc(dev);
if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
return 0;
}
static void
agp_ati_flush_tlb(device_t dev)
{
struct agp_ati_softc *sc = device_get_softc(dev);
/* Set the cache invalidate bit and wait for the chipset to clear */
WRITE4(ATI_GART_CACHE_CNTRL, 1);
(void)READ4(ATI_GART_CACHE_CNTRL);
}
static device_method_t agp_ati_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, agp_ati_probe),
DEVMETHOD(device_attach, agp_ati_attach),
DEVMETHOD(device_detach, agp_ati_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* AGP interface */
DEVMETHOD(agp_get_aperture, agp_ati_get_aperture),
DEVMETHOD(agp_set_aperture, agp_ati_set_aperture),
DEVMETHOD(agp_bind_page, agp_ati_bind_page),
DEVMETHOD(agp_unbind_page, agp_ati_unbind_page),
DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb),
DEVMETHOD(agp_enable, agp_generic_enable),
DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
DEVMETHOD(agp_free_memory, agp_generic_free_memory),
DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
{ 0, 0 }
};
static driver_t agp_ati_driver = {
"agp",
agp_ati_methods,
sizeof(struct agp_ati_softc),
};
static devclass_t agp_devclass;
DRIVER_MODULE(agp_ati, hostb, agp_ati_driver, agp_devclass, 0, 0);
MODULE_DEPEND(agp_ati, agp, 1, 1, 1);
MODULE_DEPEND(agp_ati, pci, 1, 1, 1);