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freebsd-dev/sys/pci/agp_i810.c
Eric Anholt 30e14d656c Add support for 945G/GM AGP chipsets. 
The key problem was that the aperture size detection using the MSAC bit
doesn't work -- the bit appears to be set even when it shouldn't be.  Linux
takes a different approach, testing for a bit of the GMADR (PCIR_BAR(2)) being
set.  However, as I don't think that's a safe way to test aperture size, we
just allocate the resource and check its size.  This also pointed out that
agp_generic_attach hadn't been allocating our aperture resource, which may
have caused problems in some cases.

Also corrected is a minor copy-and-pasteo in an error case.

PR:		kern/103079
Submitted by:	mnag
Tested on:	i945GM, i915GM
MFC after:	2 weeks
2006-09-27 06:38:54 +00:00

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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/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <pci/agppriv.h>
#include <pci/agpreg.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 <sys/rman.h>
MALLOC_DECLARE(M_AGP);
#define READ1(off) bus_space_read_1(sc->bst, sc->bsh, off)
#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)
#define WRITEGTT(off,v) bus_space_write_4(sc->gtt_bst, sc->gtt_bsh, off, v)
#define CHIP_I810 0 /* i810/i815 */
#define CHIP_I830 1 /* 830M/845G */
#define CHIP_I855 2 /* 852GM/855GM/865G */
#define CHIP_I915 3 /* 915G/915GM */
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 */
struct resource *regs; /* memory mapped GC registers */
bus_space_tag_t bst; /* bus_space tag */
bus_space_handle_t bsh; /* bus_space handle */
struct resource *gtt; /* memory mapped GATT entries */
bus_space_tag_t gtt_bst; /* bus_space tag */
bus_space_handle_t gtt_bsh; /* bus_space handle */
struct resource *gm; /* unmapped (but allocated) aperture */
void *argb_cursor; /* contigmalloc area for ARGB cursor */
};
/* 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"},
{0x35828086, CHIP_I855, 0x00020000,
"Intel 82852/5"},
{0x25728086, CHIP_I855, 0x00020000,
"Intel 82865G (865G GMCH) SVGA controller"},
{0x25828086, CHIP_I915, 0x00020000,
"Intel 82915G (915G GMCH) 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"},
{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;
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.
*/
if (match->chiptype == CHIP_I810) {
u_int8_t smram;
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;
}
} else if (match->chiptype == CHIP_I830 ||
match->chiptype == CHIP_I855) {
unsigned int gcc1;
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;
}
} else if (match->chiptype == CHIP_I915) {
unsigned int gcc1;
gcc1 = pci_read_config(bdev, AGP_I915_DEVEN, 4);
if ((gcc1 & AGP_I915_DEVEN_D2F0) ==
AGP_I915_DEVEN_D2F0_DISABLED) {
if (bootverbose)
printf("I915: disabled, not probing\n");
return ENXIO;
}
}
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 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, rid;
sc->bdev = agp_i810_find_bridge(dev);
if (!sc->bdev)
return ENOENT;
error = agp_generic_attach(dev);
if (error)
return error;
match = agp_i810_match(dev);
sc->chiptype = match->chiptype;
/* Same for i810 and i830 */
if (sc->chiptype == CHIP_I915)
rid = AGP_I915_MMADR;
else
rid = AGP_I810_MMADR;
sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (!sc->regs) {
agp_generic_detach(dev);
return ENODEV;
}
sc->bst = rman_get_bustag(sc->regs);
sc->bsh = rman_get_bushandle(sc->regs);
if (sc->chiptype == CHIP_I915) {
rid = AGP_I915_GTTADR;
sc->gtt = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (!sc->gtt) {
bus_release_resource(dev, SYS_RES_MEMORY,
AGP_I915_MMADR, sc->regs);
agp_generic_detach(dev);
return ENODEV;
}
sc->gtt_bst = rman_get_bustag(sc->gtt);
sc->gtt_bsh = rman_get_bushandle(sc->gtt);
/* While agp_generic_attach allocates the AGP_APBASE resource
* to try to reserve the aperture, on the 915 the aperture
* isn't in PCIR_BAR(0), it's in PCIR_BAR(2), so it allocated
* the registers that we just mapped anyway. So, allocate the
* aperture here, which also gives us easy access to it for the
* agp_i810_get_aperture().
*/
rid = AGP_I915_GMADR;
sc->gm = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0);
if (sc->gm == NULL) {
bus_release_resource(dev, SYS_RES_MEMORY,
AGP_I915_MMADR, sc->regs);
bus_release_resource(dev, SYS_RES_MEMORY,
AGP_I915_GTTADR, sc->regs);
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) {
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 (READ1(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");
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. */
WRITE4(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");
agp_generic_detach(dev);
return EINVAL;
}
if (sc->stolen > 0)
device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
/* GATT address is already in there, make sure it's enabled */
pgtblctl = READ4(AGP_I810_PGTBL_CTL);
pgtblctl |= 1;
WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
gatt->ag_physical = pgtblctl & ~1;
} else if (sc->chiptype == CHIP_I855 || sc->chiptype == CHIP_I915) { /* CHIP_I855 */
unsigned int gcc1, pgtblctl, stolen;
/* 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.
*/
if (sc->chiptype == CHIP_I855)
stolen = 132;
else
stolen = 260;
gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 1);
switch (gcc1 & AGP_I855_GCC1_GMS) {
case AGP_I855_GCC1_GMS_STOLEN_1M:
sc->stolen = (1024 - stolen) * 1024 / 4096;
break;
case AGP_I855_GCC1_GMS_STOLEN_4M:
sc->stolen = (4096 - stolen) * 1024 / 4096;
break;
case AGP_I855_GCC1_GMS_STOLEN_8M:
sc->stolen = (8192 - stolen) * 1024 / 4096;
break;
case AGP_I855_GCC1_GMS_STOLEN_16M:
sc->stolen = (16384 - stolen) * 1024 / 4096;
break;
case AGP_I855_GCC1_GMS_STOLEN_32M:
sc->stolen = (32768 - stolen) * 1024 / 4096;
break;
case AGP_I915_GCC1_GMS_STOLEN_48M:
sc->stolen = (49152 - stolen) * 1024 / 4096;
break;
case AGP_I915_GCC1_GMS_STOLEN_64M:
sc->stolen = (65536 - stolen) * 1024 / 4096;
break;
default:
sc->stolen = 0;
device_printf(dev, "unknown memory configuration, disabling\n");
agp_generic_detach(dev);
return EINVAL;
}
if (sc->stolen > 0)
device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
/* GATT address is already in there, make sure it's enabled */
pgtblctl = READ4(AGP_I810_PGTBL_CTL);
pgtblctl |= 1;
WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
gatt->ag_physical = pgtblctl & ~1;
}
return 0;
}
static int
agp_i810_detach(device_t dev)
{
struct agp_i810_softc *sc = device_get_softc(dev);
int error;
error = agp_generic_detach(dev);
if (error)
return error;
/* Clear the GATT base. */
if ( sc->chiptype == CHIP_I810 ) {
WRITE4(AGP_I810_PGTBL_CTL, 0);
} else {
unsigned int pgtblctl;
pgtblctl = READ4(AGP_I810_PGTBL_CTL);
pgtblctl &= ~1;
WRITE4(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);
if (sc->chiptype == CHIP_I915) {
bus_release_resource(dev, SYS_RES_MEMORY, AGP_I915_GMADR,
sc->gm);
bus_release_resource(dev, SYS_RES_MEMORY, AGP_I915_GTTADR,
sc->gtt);
bus_release_resource(dev, SYS_RES_MEMORY, AGP_I915_MMADR,
sc->regs);
} else {
bus_release_resource(dev, SYS_RES_MEMORY, AGP_I810_MMADR,
sc->regs);
}
return 0;
}
static u_int32_t
agp_i810_get_aperture(device_t dev)
{
struct agp_i810_softc *sc = device_get_softc(dev);
uint32_t temp;
u_int16_t miscc;
switch (sc->chiptype) {
case CHIP_I810:
miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
return 32 * 1024 * 1024;
else
return 64 * 1024 * 1024;
case CHIP_I830:
temp = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
if ((temp & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
return 64 * 1024 * 1024;
else
return 128 * 1024 * 1024;
case CHIP_I855:
return 128 * 1024 * 1024;
case CHIP_I915:
/* The documentation states that AGP_I915_MSAC should have bit
* 1 set if the aperture is 128MB instead of 256. However,
* that bit appears to not get set, so we instead use the
* aperture resource size, which should always be correct.
*/
return rman_get_size(sc->gm);
}
return 0;
}
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;
u_int32_t temp;
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:
if (aperture != 128 * 1024 * 1024) {
device_printf(dev, "bad aperture size %d\n", aperture);
return EINVAL;
}
break;
case CHIP_I915:
temp = pci_read_config(dev, AGP_I915_MSAC, 1);
temp &= ~AGP_I915_MSAC_GMASIZE;
switch (aperture) {
case 128 * 1024 * 1024:
temp |= AGP_I915_MSAC_GMASIZE_128;
break;
case 256 * 1024 * 1024:
temp |= AGP_I915_MSAC_GMASIZE_256;
break;
default:
device_printf(dev, "bad aperture size %d\n", aperture);
return EINVAL;
}
pci_write_config(dev, AGP_I915_MSAC, temp, 1);
break;
}
return 0;
}
static int
agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
{
struct agp_i810_softc *sc = device_get_softc(dev);
if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
device_printf(dev, "failed: offset is 0x%08x, shift is %d, entries is %d\n", 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;
}
}
if (sc->chiptype == CHIP_I915) {
WRITEGTT((offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
} else {
WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
}
return 0;
}
static int
agp_i810_unbind_page(device_t dev, int offset)
{
struct agp_i810_softc *sc = device_get_softc(dev);
if (offset < 0 || 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;
}
}
if (sc->chiptype == CHIP_I915) {
WRITEGTT((offset >> AGP_PAGE_SHIFT) * 4, 0);
} else {
WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 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 < 0 || (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) {
u_int32_t physical = mem->am_physical + i;
if (sc->chiptype == CHIP_I915) {
WRITEGTT(((offset + i) >> AGP_PAGE_SHIFT) * 4,
physical | 1);
} else {
WRITE4(AGP_I810_GTT +
((offset + i) >> AGP_PAGE_SHIFT) * 4,
physical | 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) {
WRITE4(AGP_I810_GTT + (offset >> 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) {
vm_offset_t offset = mem->am_offset;
if (sc->chiptype == CHIP_I915) {
WRITEGTT(((offset + i) >> AGP_PAGE_SHIFT) * 4,
0);
} else {
WRITE4(AGP_I810_GTT +
((offset + i) >> AGP_PAGE_SHIFT) * 4, 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)
WRITE4(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),
/* AGP interface */
DEVMETHOD(agp_get_aperture, agp_i810_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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