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freebsd/sys/dev/agp/agp_i810.c
Nick Hibma c1a293abfc John Baldwin suggested that 'stolen memory' only happens in the case of 
i810 and therefore is useful info there. Aperture size and stolen memory
are now printed on one line.

Submitted by:	jhb
2009-09-14 13:16:16 +00:00

1128 lines
29 KiB
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/*-
* Copyright (c) 2000 Doug Rabson
* Copyright (c) 2000 Ruslan Ermilov
* 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.
*/
/*
* Fixes for 830/845G support: David Dawes <dawes@xfree86.org>
* 852GM/855GM/865G support added by David Dawes <dawes@xfree86.org>
*/
#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/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/md_var.h>
#include <sys/rman.h>
MALLOC_DECLARE(M_AGP);
enum {
CHIP_I810, /* i810/i815 */
CHIP_I830, /* 830M/845G */
CHIP_I855, /* 852GM/855GM/865G */
CHIP_I915, /* 915G/915GM */
CHIP_I965, /* G965 */
CHIP_G33, /* G33/Q33/Q35 */
CHIP_G4X, /* G45/Q45 */
};
/* The i810 through i855 have the registers at BAR 1, and the GATT gets
* allocated by us. The i915 has registers in BAR 0 and the GATT is at the
* start of the stolen memory, and should only be accessed by the OS through
* BAR 3. The G965 has registers and GATT in the same BAR (0) -- first 512KB
* is registers, second 512KB is GATT.
*/
static struct resource_spec agp_i810_res_spec[] = {
{ SYS_RES_MEMORY, AGP_I810_MMADR, RF_ACTIVE | RF_SHAREABLE },
{ -1, 0 }
};
static struct resource_spec agp_i915_res_spec[] = {
{ SYS_RES_MEMORY, AGP_I915_MMADR, RF_ACTIVE | RF_SHAREABLE },
{ SYS_RES_MEMORY, AGP_I915_GTTADR, RF_ACTIVE | RF_SHAREABLE },
{ -1, 0 }
};
static struct resource_spec agp_i965_res_spec[] = {
{ SYS_RES_MEMORY, AGP_I965_GTTMMADR, RF_ACTIVE | RF_SHAREABLE },
{ -1, 0 }
};
struct agp_i810_softc {
struct agp_softc agp;
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
int chiptype; /* i810-like or i830 */
u_int32_t dcache_size; /* i810 only */
u_int32_t stolen; /* number of i830/845 gtt entries for stolen memory */
device_t bdev; /* bridge device */
void *argb_cursor; /* contigmalloc area for ARGB cursor */
struct resource_spec * sc_res_spec;
struct resource *sc_res[2];
};
/* For adding new devices, devid is the id of the graphics controller
* (pci:0:2:0, for example). The placeholder (usually at pci:0:2:1) for the
* second head should never be added. The bridge_offset is the offset to
* subtract from devid to get the id of the hostb that the device is on.
*/
static const struct agp_i810_match {
int devid;
int chiptype;
int bridge_offset;
char *name;
} agp_i810_matches[] = {
{0x71218086, CHIP_I810, 0x00010000,
"Intel 82810 (i810 GMCH) SVGA controller"},
{0x71238086, CHIP_I810, 0x00010000,
"Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller"},
{0x71258086, CHIP_I810, 0x00010000,
"Intel 82810E (i810E GMCH) SVGA controller"},
{0x11328086, CHIP_I810, 0x00020000,
"Intel 82815 (i815 GMCH) SVGA controller"},
{0x35778086, CHIP_I830, 0x00020000,
"Intel 82830M (830M GMCH) SVGA controller"},
{0x25628086, CHIP_I830, 0x00020000,
"Intel 82845M (845M GMCH) SVGA controller"},
{0x35828086, CHIP_I855, 0x00020000,
"Intel 82852/855GM SVGA controller"},
{0x25728086, CHIP_I855, 0x00020000,
"Intel 82865G (865G GMCH) SVGA controller"},
{0x25828086, CHIP_I915, 0x00020000,
"Intel 82915G (915G GMCH) SVGA controller"},
{0x258A8086, CHIP_I915, 0x00020000,
"Intel E7221 SVGA controller"},
{0x25928086, CHIP_I915, 0x00020000,
"Intel 82915GM (915GM GMCH) SVGA controller"},
{0x27728086, CHIP_I915, 0x00020000,
"Intel 82945G (945G GMCH) SVGA controller"},
{0x27A28086, CHIP_I915, 0x00020000,
"Intel 82945GM (945GM GMCH) SVGA controller"},
{0x27AE8086, CHIP_I915, 0x00020000,
"Intel 945GME SVGA controller"},
{0x29728086, CHIP_I965, 0x00020000,
"Intel 946GZ SVGA controller"},
{0x29828086, CHIP_I965, 0x00020000,
"Intel G965 SVGA controller"},
{0x29928086, CHIP_I965, 0x00020000,
"Intel Q965 SVGA controller"},
{0x29A28086, CHIP_I965, 0x00020000,
"Intel G965 SVGA controller"},
{0x29B28086, CHIP_G33, 0x00020000,
"Intel Q35 SVGA controller"},
{0x29C28086, CHIP_G33, 0x00020000,
"Intel G33 SVGA controller"},
{0x29D28086, CHIP_G33, 0x00020000,
"Intel Q33 SVGA controller"},
{0x2A028086, CHIP_I965, 0x00020000,
"Intel GM965 SVGA controller"},
{0x2A128086, CHIP_I965, 0x00020000,
"Intel GME965 SVGA controller"},
{0x2A428086, CHIP_G4X, 0x00020000,
"Intel GM45 SVGA controller"},
{0x2E028086, CHIP_G4X, 0x00020000,
"Intel 4 Series SVGA controller"},
{0x2E128086, CHIP_G4X, 0x00020000,
"Intel Q45 SVGA controller"},
{0x2E228086, CHIP_G4X, 0x00020000,
"Intel G45 SVGA controller"},
{0, 0, 0, NULL}
};
static const struct agp_i810_match*
agp_i810_match(device_t dev)
{
int i, devid;
if (pci_get_class(dev) != PCIC_DISPLAY
|| pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
return NULL;
devid = pci_get_devid(dev);
for (i = 0; agp_i810_matches[i].devid != 0; i++) {
if (agp_i810_matches[i].devid == devid)
break;
}
if (agp_i810_matches[i].devid == 0)
return NULL;
else
return &agp_i810_matches[i];
}
/*
* Find bridge device.
*/
static device_t
agp_i810_find_bridge(device_t dev)
{
device_t *children, child;
int nchildren, i;
u_int32_t devid;
const struct agp_i810_match *match;
match = agp_i810_match(dev);
devid = match->devid - match->bridge_offset;
if (device_get_children(device_get_parent(device_get_parent(dev)),
&children, &nchildren))
return 0;
for (i = 0; i < nchildren; i++) {
child = children[i];
if (pci_get_devid(child) == devid) {
free(children, M_TEMP);
return child;
}
}
free(children, M_TEMP);
return 0;
}
static void
agp_i810_identify(driver_t *driver, device_t parent)
{
if (device_find_child(parent, "agp", -1) == NULL &&
agp_i810_match(parent))
device_add_child(parent, "agp", -1);
}
static int
agp_i810_probe(device_t dev)
{
device_t bdev;
const struct agp_i810_match *match;
u_int8_t smram;
int gcc1, deven;
if (resource_disabled("agp", device_get_unit(dev)))
return (ENXIO);
match = agp_i810_match(dev);
if (match == NULL)
return ENXIO;
bdev = agp_i810_find_bridge(dev);
if (!bdev) {
if (bootverbose)
printf("I810: can't find bridge device\n");
return ENXIO;
}
/*
* checking whether internal graphics device has been activated.
*/
switch (match->chiptype) {
case CHIP_I810:
smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
if ((smram & AGP_I810_SMRAM_GMS) ==
AGP_I810_SMRAM_GMS_DISABLED) {
if (bootverbose)
printf("I810: disabled, not probing\n");
return ENXIO;
}
break;
case CHIP_I830:
case CHIP_I855:
gcc1 = pci_read_config(bdev, AGP_I830_GCC1, 1);
if ((gcc1 & AGP_I830_GCC1_DEV2) ==
AGP_I830_GCC1_DEV2_DISABLED) {
if (bootverbose)
printf("I830: disabled, not probing\n");
return ENXIO;
}
break;
case CHIP_I915:
case CHIP_I965:
case CHIP_G33:
case CHIP_G4X:
deven = pci_read_config(bdev, AGP_I915_DEVEN, 4);
if ((deven & AGP_I915_DEVEN_D2F0) ==
AGP_I915_DEVEN_D2F0_DISABLED) {
if (bootverbose)
printf("I915: disabled, not probing\n");
return ENXIO;
}
break;
}
if (match->devid == 0x35828086) {
switch (pci_read_config(dev, AGP_I85X_CAPID, 1)) {
case AGP_I855_GME:
device_set_desc(dev,
"Intel 82855GME (855GME GMCH) SVGA controller");
break;
case AGP_I855_GM:
device_set_desc(dev,
"Intel 82855GM (855GM GMCH) SVGA controller");
break;
case AGP_I852_GME:
device_set_desc(dev,
"Intel 82852GME (852GME GMCH) SVGA controller");
break;
case AGP_I852_GM:
device_set_desc(dev,
"Intel 82852GM (852GM GMCH) SVGA controller");
break;
default:
device_set_desc(dev,
"Intel 8285xM (85xGM GMCH) SVGA controller");
break;
}
} else {
device_set_desc(dev, match->name);
}
return BUS_PROBE_DEFAULT;
}
static void
agp_i810_dump_regs(device_t dev)
{
struct agp_i810_softc *sc = device_get_softc(dev);
device_printf(dev, "AGP_I810_PGTBL_CTL: %08x\n",
bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL));
switch (sc->chiptype) {
case CHIP_I810:
device_printf(dev, "AGP_I810_MISCC: 0x%04x\n",
pci_read_config(sc->bdev, AGP_I810_MISCC, 2));
break;
case CHIP_I830:
device_printf(dev, "AGP_I830_GCC1: 0x%02x\n",
pci_read_config(sc->bdev, AGP_I830_GCC1, 1));
break;
case CHIP_I855:
device_printf(dev, "AGP_I855_GCC1: 0x%02x\n",
pci_read_config(sc->bdev, AGP_I855_GCC1, 1));
break;
case CHIP_I915:
case CHIP_I965:
case CHIP_G33:
case CHIP_G4X:
device_printf(dev, "AGP_I855_GCC1: 0x%02x\n",
pci_read_config(sc->bdev, AGP_I855_GCC1, 1));
device_printf(dev, "AGP_I915_MSAC: 0x%02x\n",
pci_read_config(sc->bdev, AGP_I915_MSAC, 1));
break;
}
device_printf(dev, "Aperture resource size: %d bytes\n",
AGP_GET_APERTURE(dev));
}
static int
agp_i810_attach(device_t dev)
{
struct agp_i810_softc *sc = device_get_softc(dev);
struct agp_gatt *gatt;
const struct agp_i810_match *match;
int error;
sc->bdev = agp_i810_find_bridge(dev);
if (!sc->bdev)
return ENOENT;
match = agp_i810_match(dev);
sc->chiptype = match->chiptype;
switch (sc->chiptype) {
case CHIP_I810:
case CHIP_I830:
case CHIP_I855:
sc->sc_res_spec = agp_i810_res_spec;
agp_set_aperture_resource(dev, AGP_APBASE);
break;
case CHIP_I915:
case CHIP_G33:
sc->sc_res_spec = agp_i915_res_spec;
agp_set_aperture_resource(dev, AGP_I915_GMADR);
break;
case CHIP_I965:
case CHIP_G4X:
sc->sc_res_spec = agp_i965_res_spec;
agp_set_aperture_resource(dev, AGP_I915_GMADR);
break;
}
error = agp_generic_attach(dev);
if (error)
return error;
if (sc->chiptype != CHIP_I965 && sc->chiptype != CHIP_G33 &&
sc->chiptype != CHIP_G4X && ptoa((vm_paddr_t)Maxmem) > 0xfffffffful)
{
device_printf(dev, "agp_i810.c does not support physical "
"memory above 4GB.\n");
return ENOENT;
}
if (bus_alloc_resources(dev, sc->sc_res_spec, sc->sc_res)) {
agp_generic_detach(dev);
return ENODEV;
}
sc->initial_aperture = AGP_GET_APERTURE(dev);
gatt = malloc( sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
if (!gatt) {
bus_release_resources(dev, sc->sc_res_spec, sc->sc_res);
agp_generic_detach(dev);
return ENOMEM;
}
sc->gatt = gatt;
gatt->ag_entries = AGP_GET_APERTURE(dev) >> AGP_PAGE_SHIFT;
if ( sc->chiptype == CHIP_I810 ) {
/* Some i810s have on-chip memory called dcache */
if (bus_read_1(sc->sc_res[0], AGP_I810_DRT) &
AGP_I810_DRT_POPULATED)
sc->dcache_size = 4 * 1024 * 1024;
else
sc->dcache_size = 0;
/* According to the specs the gatt on the i810 must be 64k */
gatt->ag_virtual = contigmalloc( 64 * 1024, M_AGP, 0,
0, ~0, PAGE_SIZE, 0);
if (!gatt->ag_virtual) {
if (bootverbose)
device_printf(dev, "contiguous allocation failed\n");
bus_release_resources(dev, sc->sc_res_spec,
sc->sc_res);
free(gatt, M_AGP);
agp_generic_detach(dev);
return ENOMEM;
}
bzero(gatt->ag_virtual, gatt->ag_entries * sizeof(u_int32_t));
gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
agp_flush_cache();
/* Install the GATT. */
bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL,
gatt->ag_physical | 1);
} else if ( sc->chiptype == CHIP_I830 ) {
/* The i830 automatically initializes the 128k gatt on boot. */
unsigned int gcc1, pgtblctl;
gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);
switch (gcc1 & AGP_I830_GCC1_GMS) {
case AGP_I830_GCC1_GMS_STOLEN_512:
sc->stolen = (512 - 132) * 1024 / 4096;
break;
case AGP_I830_GCC1_GMS_STOLEN_1024:
sc->stolen = (1024 - 132) * 1024 / 4096;
break;
case AGP_I830_GCC1_GMS_STOLEN_8192:
sc->stolen = (8192 - 132) * 1024 / 4096;
break;
default:
sc->stolen = 0;
device_printf(dev, "unknown memory configuration, disabling\n");
bus_release_resources(dev, sc->sc_res_spec,
sc->sc_res);
free(gatt, M_AGP);
agp_generic_detach(dev);
return EINVAL;
}
/* GATT address is already in there, make sure it's enabled */
pgtblctl = bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL);
pgtblctl |= 1;
bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL, pgtblctl);
gatt->ag_physical = pgtblctl & ~1;
} else if (sc->chiptype == CHIP_I855 || sc->chiptype == CHIP_I915 ||
sc->chiptype == CHIP_I965 || sc->chiptype == CHIP_G33 ||
sc->chiptype == CHIP_G4X) {
unsigned int gcc1, pgtblctl, stolen, gtt_size;
/* Stolen memory is set up at the beginning of the aperture by
* the BIOS, consisting of the GATT followed by 4kb for the
* BIOS display.
*/
switch (sc->chiptype) {
case CHIP_I855:
gtt_size = 128;
break;
case CHIP_I915:
gtt_size = 256;
break;
case CHIP_I965:
switch (bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL) &
AGP_I810_PGTBL_SIZE_MASK) {
case AGP_I810_PGTBL_SIZE_128KB:
gtt_size = 128;
break;
case AGP_I810_PGTBL_SIZE_256KB:
gtt_size = 256;
break;
case AGP_I810_PGTBL_SIZE_512KB:
gtt_size = 512;
break;
case AGP_I965_PGTBL_SIZE_1MB:
gtt_size = 1024;
break;
case AGP_I965_PGTBL_SIZE_2MB:
gtt_size = 2048;
break;
case AGP_I965_PGTBL_SIZE_1_5MB:
gtt_size = 1024 + 512;
break;
default:
device_printf(dev, "Bad PGTBL size\n");
bus_release_resources(dev, sc->sc_res_spec,
sc->sc_res);
free(gatt, M_AGP);
agp_generic_detach(dev);
return EINVAL;
}
break;
case CHIP_G33:
gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 2);
switch (gcc1 & AGP_G33_MGGC_GGMS_MASK) {
case AGP_G33_MGGC_GGMS_SIZE_1M:
gtt_size = 1024;
break;
case AGP_G33_MGGC_GGMS_SIZE_2M:
gtt_size = 2048;
break;
default:
device_printf(dev, "Bad PGTBL size\n");
bus_release_resources(dev, sc->sc_res_spec,
sc->sc_res);
free(gatt, M_AGP);
agp_generic_detach(dev);
return EINVAL;
}
break;
case CHIP_G4X:
gtt_size = 0;
break;
default:
device_printf(dev, "Bad chiptype\n");
bus_release_resources(dev, sc->sc_res_spec,
sc->sc_res);
free(gatt, M_AGP);
agp_generic_detach(dev);
return EINVAL;
}
/* GCC1 is called MGGC on i915+ */
gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 1);
switch (gcc1 & AGP_I855_GCC1_GMS) {
case AGP_I855_GCC1_GMS_STOLEN_1M:
stolen = 1024;
break;
case AGP_I855_GCC1_GMS_STOLEN_4M:
stolen = 4 * 1024;
break;
case AGP_I855_GCC1_GMS_STOLEN_8M:
stolen = 8 * 1024;
break;
case AGP_I855_GCC1_GMS_STOLEN_16M:
stolen = 16 * 1024;
break;
case AGP_I855_GCC1_GMS_STOLEN_32M:
stolen = 32 * 1024;
break;
case AGP_I915_GCC1_GMS_STOLEN_48M:
if (sc->chiptype == CHIP_I915 ||
sc->chiptype == CHIP_I965 ||
sc->chiptype == CHIP_G33 ||
sc->chiptype == CHIP_G4X) {
stolen = 48 * 1024;
} else {
stolen = 0;
}
break;
case AGP_I915_GCC1_GMS_STOLEN_64M:
if (sc->chiptype == CHIP_I915 ||
sc->chiptype == CHIP_I965 ||
sc->chiptype == CHIP_G33 ||
sc->chiptype == CHIP_G4X) {
stolen = 64 * 1024;
} else {
stolen = 0;
}
break;
case AGP_G33_GCC1_GMS_STOLEN_128M:
if (sc->chiptype == CHIP_I965 ||
sc->chiptype == CHIP_G33 ||
sc->chiptype == CHIP_G4X) {
stolen = 128 * 1024;
} else {
stolen = 0;
}
break;
case AGP_G33_GCC1_GMS_STOLEN_256M:
if (sc->chiptype == CHIP_I965 ||
sc->chiptype == CHIP_G33 ||
sc->chiptype == CHIP_G4X) {
stolen = 256 * 1024;
} else {
stolen = 0;
}
break;
case AGP_G4X_GCC1_GMS_STOLEN_96M:
if (sc->chiptype == CHIP_I965 ||
sc->chiptype == CHIP_G4X) {
stolen = 96 * 1024;
} else {
stolen = 0;
}
break;
case AGP_G4X_GCC1_GMS_STOLEN_160M:
if (sc->chiptype == CHIP_I965 ||
sc->chiptype == CHIP_G4X) {
stolen = 160 * 1024;
} else {
stolen = 0;
}
break;
case AGP_G4X_GCC1_GMS_STOLEN_224M:
if (sc->chiptype == CHIP_I965 ||
sc->chiptype == CHIP_G4X) {
stolen = 224 * 1024;
} else {
stolen = 0;
}
break;
case AGP_G4X_GCC1_GMS_STOLEN_352M:
if (sc->chiptype == CHIP_I965 ||
sc->chiptype == CHIP_G4X) {
stolen = 352 * 1024;
} else {
stolen = 0;
}
break;
default:
device_printf(dev, "unknown memory configuration, "
"disabling\n");
bus_release_resources(dev, sc->sc_res_spec,
sc->sc_res);
free(gatt, M_AGP);
agp_generic_detach(dev);
return EINVAL;
}
gtt_size += 4;
sc->stolen = (stolen - gtt_size) * 1024 / 4096;
/* GATT address is already in there, make sure it's enabled */
pgtblctl = bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL);
pgtblctl |= 1;
bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL, pgtblctl);
gatt->ag_physical = pgtblctl & ~1;
}
device_printf(dev, "aperture size is %dM",
sc->initial_aperture / 1024 / 1024);
if (sc->stolen > 0)
printf(", detected %dk stolen memory\n", sc->stolen * 4);
else
printf("\n");
if (0)
agp_i810_dump_regs(dev);
return 0;
}
static int
agp_i810_detach(device_t dev)
{
struct agp_i810_softc *sc = device_get_softc(dev);
agp_free_cdev(dev);
/* Clear the GATT base. */
if ( sc->chiptype == CHIP_I810 ) {
bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL, 0);
} else {
unsigned int pgtblctl;
pgtblctl = bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL);
pgtblctl &= ~1;
bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL, pgtblctl);
}
/* Put the aperture back the way it started. */
AGP_SET_APERTURE(dev, sc->initial_aperture);
if ( sc->chiptype == CHIP_I810 ) {
contigfree(sc->gatt->ag_virtual, 64 * 1024, M_AGP);
}
free(sc->gatt, M_AGP);
bus_release_resources(dev, sc->sc_res_spec, sc->sc_res);
agp_free_res(dev);
return 0;
}
static int
agp_i810_resume(device_t dev)
{
struct agp_i810_softc *sc;
sc = device_get_softc(dev);
AGP_SET_APERTURE(dev, sc->initial_aperture);
/* Install the GATT. */
bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL,
sc->gatt->ag_physical | 1);
return (bus_generic_resume(dev));
}
/**
* Sets the PCI resource size of the aperture on i830-class and below chipsets,
* while returning failure on later chipsets when an actual change is
* requested.
*
* This whole function is likely bogus, as the kernel would probably need to
* reconfigure the placement of the AGP aperture if a larger size is requested,
* which doesn't happen currently.
*/
static int
agp_i810_set_aperture(device_t dev, u_int32_t aperture)
{
struct agp_i810_softc *sc = device_get_softc(dev);
u_int16_t miscc, gcc1;
switch (sc->chiptype) {
case CHIP_I810:
/*
* Double check for sanity.
*/
if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
device_printf(dev, "bad aperture size %d\n", aperture);
return EINVAL;
}
miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
miscc &= ~AGP_I810_MISCC_WINSIZE;
if (aperture == 32 * 1024 * 1024)
miscc |= AGP_I810_MISCC_WINSIZE_32;
else
miscc |= AGP_I810_MISCC_WINSIZE_64;
pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
break;
case CHIP_I830:
if (aperture != 64 * 1024 * 1024 &&
aperture != 128 * 1024 * 1024) {
device_printf(dev, "bad aperture size %d\n", aperture);
return EINVAL;
}
gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
gcc1 &= ~AGP_I830_GCC1_GMASIZE;
if (aperture == 64 * 1024 * 1024)
gcc1 |= AGP_I830_GCC1_GMASIZE_64;
else
gcc1 |= AGP_I830_GCC1_GMASIZE_128;
pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
break;
case CHIP_I855:
case CHIP_I915:
case CHIP_I965:
case CHIP_G33:
case CHIP_G4X:
return agp_generic_set_aperture(dev, aperture);
}
return 0;
}
/**
* Writes a GTT entry mapping the page at the given offset from the beginning
* of the aperture to the given physical address.
*/
static void
agp_i810_write_gtt_entry(device_t dev, int offset, vm_offset_t physical,
int enabled)
{
struct agp_i810_softc *sc = device_get_softc(dev);
u_int32_t pte;
pte = (u_int32_t)physical | 1;
if (sc->chiptype == CHIP_I965 || sc->chiptype == CHIP_G33 ||
sc->chiptype == CHIP_G4X) {
pte |= (physical & 0x0000000f00000000ull) >> 28;
} else {
/* If we do actually have memory above 4GB on an older system,
* crash cleanly rather than scribble on system memory,
* so we know we need to fix it.
*/
KASSERT((pte & 0x0000000f00000000ull) == 0,
(">4GB physical address in agp"));
}
switch (sc->chiptype) {
case CHIP_I810:
case CHIP_I830:
case CHIP_I855:
bus_write_4(sc->sc_res[0],
AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, pte);
break;
case CHIP_I915:
case CHIP_G33:
bus_write_4(sc->sc_res[1],
(offset >> AGP_PAGE_SHIFT) * 4, pte);
break;
case CHIP_I965:
bus_write_4(sc->sc_res[0],
(offset >> AGP_PAGE_SHIFT) * 4 + (512 * 1024), pte);
break;
case CHIP_G4X:
bus_write_4(sc->sc_res[0],
(offset >> AGP_PAGE_SHIFT) * 4 + (2 * 1024 * 1024), pte);
break;
}
}
static int
agp_i810_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
{
struct agp_i810_softc *sc = device_get_softc(dev);
if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
device_printf(dev, "failed: offset is 0x%08jx, shift is %d, entries is %d\n", (intmax_t)offset, AGP_PAGE_SHIFT, sc->gatt->ag_entries);
return EINVAL;
}
if ( sc->chiptype != CHIP_I810 ) {
if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
device_printf(dev, "trying to bind into stolen memory");
return EINVAL;
}
}
agp_i810_write_gtt_entry(dev, offset, physical, 1);
return 0;
}
static int
agp_i810_unbind_page(device_t dev, vm_offset_t offset)
{
struct agp_i810_softc *sc = device_get_softc(dev);
if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
if ( sc->chiptype != CHIP_I810 ) {
if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
device_printf(dev, "trying to unbind from stolen memory");
return EINVAL;
}
}
agp_i810_write_gtt_entry(dev, offset, 0, 0);
return 0;
}
/*
* Writing via memory mapped registers already flushes all TLBs.
*/
static void
agp_i810_flush_tlb(device_t dev)
{
}
static int
agp_i810_enable(device_t dev, u_int32_t mode)
{
return 0;
}
static struct agp_memory *
agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
{
struct agp_i810_softc *sc = device_get_softc(dev);
struct agp_memory *mem;
if ((size & (AGP_PAGE_SIZE - 1)) != 0)
return 0;
if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
return 0;
if (type == 1) {
/*
* Mapping local DRAM into GATT.
*/
if ( sc->chiptype != CHIP_I810 )
return 0;
if (size != sc->dcache_size)
return 0;
} else if (type == 2) {
/*
* Type 2 is the contiguous physical memory type, that hands
* back a physical address. This is used for cursors on i810.
* Hand back as many single pages with physical as the user
* wants, but only allow one larger allocation (ARGB cursor)
* for simplicity.
*/
if (size != AGP_PAGE_SIZE) {
if (sc->argb_cursor != NULL)
return 0;
/* Allocate memory for ARGB cursor, if we can. */
sc->argb_cursor = contigmalloc(size, M_AGP,
0, 0, ~0, PAGE_SIZE, 0);
if (sc->argb_cursor == NULL)
return 0;
}
}
mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
mem->am_id = sc->agp.as_nextid++;
mem->am_size = size;
mem->am_type = type;
if (type != 1 && (type != 2 || size == AGP_PAGE_SIZE))
mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
atop(round_page(size)));
else
mem->am_obj = 0;
if (type == 2) {
if (size == AGP_PAGE_SIZE) {
/*
* Allocate and wire down the page now so that we can
* get its physical address.
*/
vm_page_t m;
VM_OBJECT_LOCK(mem->am_obj);
m = vm_page_grab(mem->am_obj, 0, VM_ALLOC_NOBUSY |
VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
VM_OBJECT_UNLOCK(mem->am_obj);
mem->am_physical = VM_PAGE_TO_PHYS(m);
} else {
/* Our allocation is already nicely wired down for us.
* Just grab the physical address.
*/
mem->am_physical = vtophys(sc->argb_cursor);
}
} else {
mem->am_physical = 0;
}
mem->am_offset = 0;
mem->am_is_bound = 0;
TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
sc->agp.as_allocated += size;
return mem;
}
static int
agp_i810_free_memory(device_t dev, struct agp_memory *mem)
{
struct agp_i810_softc *sc = device_get_softc(dev);
if (mem->am_is_bound)
return EBUSY;
if (mem->am_type == 2) {
if (mem->am_size == AGP_PAGE_SIZE) {
/*
* Unwire the page which we wired in alloc_memory.
*/
vm_page_t m;
VM_OBJECT_LOCK(mem->am_obj);
m = vm_page_lookup(mem->am_obj, 0);
VM_OBJECT_UNLOCK(mem->am_obj);
vm_page_lock_queues();
vm_page_unwire(m, 0);
vm_page_unlock_queues();
} else {
contigfree(sc->argb_cursor, mem->am_size, M_AGP);
sc->argb_cursor = NULL;
}
}
sc->agp.as_allocated -= mem->am_size;
TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
if (mem->am_obj)
vm_object_deallocate(mem->am_obj);
free(mem, M_AGP);
return 0;
}
static int
agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
vm_offset_t offset)
{
struct agp_i810_softc *sc = device_get_softc(dev);
vm_offset_t i;
/* Do some sanity checks first. */
if ((offset & (AGP_PAGE_SIZE - 1)) != 0 ||
offset + mem->am_size > AGP_GET_APERTURE(dev)) {
device_printf(dev, "binding memory at bad offset %#x\n",
(int)offset);
return EINVAL;
}
if (mem->am_type == 2 && mem->am_size != AGP_PAGE_SIZE) {
mtx_lock(&sc->agp.as_lock);
if (mem->am_is_bound) {
mtx_unlock(&sc->agp.as_lock);
return EINVAL;
}
/* The memory's already wired down, just stick it in the GTT. */
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
agp_i810_write_gtt_entry(dev, offset + i,
mem->am_physical + i, 1);
}
agp_flush_cache();
mem->am_offset = offset;
mem->am_is_bound = 1;
mtx_unlock(&sc->agp.as_lock);
return 0;
}
if (mem->am_type != 1)
return agp_generic_bind_memory(dev, mem, offset);
if ( sc->chiptype != CHIP_I810 )
return EINVAL;
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
bus_write_4(sc->sc_res[0],
AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, i | 3);
}
return 0;
}
static int
agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
{
struct agp_i810_softc *sc = device_get_softc(dev);
vm_offset_t i;
if (mem->am_type == 2 && mem->am_size != AGP_PAGE_SIZE) {
mtx_lock(&sc->agp.as_lock);
if (!mem->am_is_bound) {
mtx_unlock(&sc->agp.as_lock);
return EINVAL;
}
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
agp_i810_write_gtt_entry(dev, mem->am_offset + i,
0, 0);
}
agp_flush_cache();
mem->am_is_bound = 0;
mtx_unlock(&sc->agp.as_lock);
return 0;
}
if (mem->am_type != 1)
return agp_generic_unbind_memory(dev, mem);
if ( sc->chiptype != CHIP_I810 )
return EINVAL;
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
bus_write_4(sc->sc_res[0],
AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
}
return 0;
}
static device_method_t agp_i810_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, agp_i810_identify),
DEVMETHOD(device_probe, agp_i810_probe),
DEVMETHOD(device_attach, agp_i810_attach),
DEVMETHOD(device_detach, agp_i810_detach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, agp_i810_resume),
/* AGP interface */
DEVMETHOD(agp_get_aperture, agp_generic_get_aperture),
DEVMETHOD(agp_set_aperture, agp_i810_set_aperture),
DEVMETHOD(agp_bind_page, agp_i810_bind_page),
DEVMETHOD(agp_unbind_page, agp_i810_unbind_page),
DEVMETHOD(agp_flush_tlb, agp_i810_flush_tlb),
DEVMETHOD(agp_enable, agp_i810_enable),
DEVMETHOD(agp_alloc_memory, agp_i810_alloc_memory),
DEVMETHOD(agp_free_memory, agp_i810_free_memory),
DEVMETHOD(agp_bind_memory, agp_i810_bind_memory),
DEVMETHOD(agp_unbind_memory, agp_i810_unbind_memory),
{ 0, 0 }
};
static driver_t agp_i810_driver = {
"agp",
agp_i810_methods,
sizeof(struct agp_i810_softc),
};
static devclass_t agp_devclass;
DRIVER_MODULE(agp_i810, vgapci, agp_i810_driver, agp_devclass, 0, 0);
MODULE_DEPEND(agp_i810, agp, 1, 1, 1);
MODULE_DEPEND(agp_i810, pci, 1, 1, 1);
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