OpenBSD-4.6/sys/dev/pci/agp.c
/* $OpenBSD: agp.c,v 1.32 2009/05/10 16:57:44 oga 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.c,v 1.12 2001/05/19 01:28:07 alfred Exp $
*/
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/agpio.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <uvm/uvm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/ic/mc6845reg.h>
#include <dev/ic/pcdisplayvar.h>
#include <dev/ic/vgareg.h>
#include <dev/ic/vgavar.h>
#include <dev/pci/agpvar.h>
#include <dev/pci/agpreg.h>
/*
* the enable and {alloc, free, bind, unbind} memory routines have default
* fallbacks, these macros do the right thing. The callbacks with no fallback
* are called directly. These are mostly hacks around the weirdness of intel
* integrated graphics, since they are not technically a true agp chipset,
* but provide an almost identical interface.
*/
int agp_generic_enable(struct agp_softc *, u_int32_t);
struct agp_memory *
agp_generic_alloc_memory(struct agp_softc *, int, vsize_t size);
int agp_generic_free_memory(struct agp_softc *, struct agp_memory *);
void agp_attach(struct device *, struct device *, void *);
int agp_probe(struct device *, void *, void *);
int agpbusprint(void *, const char *);
paddr_t agpmmap(void *, off_t, int);
int agpioctl(dev_t, u_long, caddr_t, int, struct proc *);
int agpopen(dev_t, int, int, struct proc *);
int agpclose(dev_t, int, int , struct proc *);
struct agp_memory *agp_find_memory(struct agp_softc *sc, int id);
/* userland ioctl functions */
int agpvga_match(struct pci_attach_args *);
int agp_info_user(void *, agp_info *);
int agp_setup_user(void *, agp_setup *);
int agp_allocate_user(void *, agp_allocate *);
int agp_deallocate_user(void *, int);
int agp_bind_user(void *, agp_bind *);
int agp_unbind_user(void *, agp_unbind *);
int agp_acquire_helper(void *dev, enum agp_acquire_state state);
int agp_release_helper(void *dev, enum agp_acquire_state state);
int
agpdev_print(void *aux, const char *pnp)
{
if (pnp) {
printf("agp at %s", pnp);
}
return (UNCONF);
}
int
agpbus_probe(struct agp_attach_args *aa)
{
struct pci_attach_args *pa = aa->aa_pa;
if (strncmp(aa->aa_busname, "agp", 3) == 0 &&
PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_HOST)
return (1);
return (0);
}
/*
* Find the video card hanging off the agp bus XXX assumes only one bus
*/
int
agpvga_match(struct pci_attach_args *pa)
{
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) {
if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP,
NULL, NULL))
return (1);
}
return (0);
}
struct device *
agp_attach_bus(struct pci_attach_args *pa, const struct agp_methods *methods,
bus_addr_t apaddr, bus_size_t apsize, struct device *dev)
{
struct agpbus_attach_args arg;
arg.aa_methods = methods;
arg.aa_pa = pa;
arg.aa_apaddr = apaddr;
arg.aa_apsize = apsize;
printf("\n"); /* newline from the driver that called us */
return (config_found(dev, &arg, agpdev_print));
}
int
agp_probe(struct device *parent, void *match, void *aux)
{
/*
* we don't do any checking here, driver we're attaching this
* interface to should have already done it.
*/
return (1);
}
void
agp_attach(struct device *parent, struct device *self, void *aux)
{
struct agpbus_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
struct agp_softc *sc = (struct agp_softc *)self;
u_int memsize;
int i;
sc->sc_chipc = parent;
sc->sc_methods = aa->aa_methods;
sc->sc_apaddr = aa->aa_apaddr;
sc->sc_apsize = aa->aa_apsize;
static const int agp_max[][2] = {
{0, 0},
{32, 4},
{64, 28},
{128, 96},
{256, 204},
{512, 440},
{1024, 942},
{2048, 1920},
{4096, 3932}
};
#define agp_max_size (sizeof(agp_max)/sizeof(agp_max[0]))
/*
* Work out an upper bound for agp memory allocation. This
* uses a heuristic table from the Linux driver.
*/
memsize = ptoa(physmem) >> 20;
for (i = 0; i < agp_max_size && memsize > agp_max[i][0]; i++)
;
if (i == agp_max_size)
i = agp_max_size - 1;
sc->sc_maxmem = agp_max[i][1] << 20;
/*
* The lock is used to prevent re-entry to
* agp_generic_bind_memory() since that function can sleep.
*/
rw_init(&sc->sc_lock, "agplk");
TAILQ_INIT(&sc->sc_memory);
sc->sc_pcitag = pa->pa_tag;
sc->sc_pc = pa->pa_pc;
sc->sc_id = pa->pa_id;
sc->sc_dmat = pa->pa_dmat;
pci_get_capability(sc->sc_pc, sc->sc_pcitag, PCI_CAP_AGP,
&sc->sc_capoff, NULL);
printf(": aperture at 0x%lx, size 0x%lx\n", (u_long)sc->sc_apaddr,
(u_long)sc->sc_apsize);
}
struct cfattach agp_ca = {
sizeof(struct agp_softc), agp_probe, agp_attach,
NULL, NULL
};
struct cfdriver agp_cd = {
NULL, "agp", DV_DULL
};
paddr_t
agpmmap(void *v, off_t off, int prot)
{
struct agp_softc* sc = (struct agp_softc *)v;
if (sc->sc_apaddr) {
if (off > sc->sc_apsize)
return (-1);
/*
* XXX this should use bus_space_mmap() but it's not
* availiable on all archs.
*/
return atop(sc->sc_apaddr + off);
}
return (-1);
}
int
agpopen(dev_t dev, int oflags, int devtype, struct proc *p)
{
struct agp_softc *sc = agp_find_device(AGPUNIT(dev));
if (sc == NULL || sc->sc_chipc == NULL)
return (ENXIO);
if (!sc->sc_opened)
sc->sc_opened = 1;
else
return (EBUSY);
return (0);
}
int
agpioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *pb)
{
struct agp_softc *sc = agp_find_device(AGPUNIT(dev));
if (sc == NULL)
return (ENODEV);
if (sc->sc_methods == NULL || sc->sc_chipc == NULL)
return (ENXIO);
if (cmd != AGPIOC_INFO && !(flag & FWRITE))
return (EPERM);
switch(cmd) {
case AGPIOC_INFO:
return (agp_info_user(sc, (agp_info *)addr));
case AGPIOC_ACQUIRE:
return (agp_acquire_helper(sc, AGP_ACQUIRE_USER));
case AGPIOC_RELEASE:
return (agp_release_helper(sc, AGP_ACQUIRE_USER));
case AGPIOC_SETUP:
return (agp_setup_user(sc, (agp_setup *)addr));
case AGPIOC_ALLOCATE:
return (agp_allocate_user(sc, (agp_allocate *)addr));
case AGPIOC_DEALLOCATE:
return (agp_deallocate_user(sc, *(int *)addr));
case AGPIOC_BIND:
return (agp_bind_user(sc, (agp_bind *)addr));
case AGPIOC_UNBIND:
return (agp_unbind_user(sc, (agp_unbind *)addr));
default:
return (ENOTTY);
}
}
int
agpclose(dev_t dev, int flags, int devtype, struct proc *p)
{
struct agp_softc *sc = agp_find_device(AGPUNIT(dev));
struct agp_memory *mem;
/*
* Clear the GATT and force release on last close
*/
if (sc->sc_state == AGP_ACQUIRE_USER) {
while ((mem = TAILQ_FIRST(&sc->sc_memory)) != 0) {
if (mem->am_is_bound) {
agp_unbind_memory(sc, mem);
}
agp_free_memory(sc, mem);
}
agp_release_helper(sc, AGP_ACQUIRE_USER);
}
sc->sc_opened = 0;
return (0);
}
struct agp_memory *
agp_find_memory(struct agp_softc *sc, int id)
{
struct agp_memory *mem;
AGP_DPF("searching for memory block %d\n", id);
TAILQ_FOREACH(mem, &sc->sc_memory, am_link) {
AGP_DPF("considering memory block %d\n", mem->am_id);
if (mem->am_id == id)
return (mem);
}
return (0);
}
struct agp_gatt *
agp_alloc_gatt(bus_dma_tag_t dmat, u_int32_t apsize)
{
struct agp_gatt *gatt;
u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
gatt = malloc(sizeof(*gatt), M_AGP, M_NOWAIT | M_ZERO);
if (!gatt)
return (NULL);
gatt->ag_entries = entries;
gatt->ag_size = entries * sizeof(u_int32_t);
if (agp_alloc_dmamem(dmat, gatt->ag_size, &gatt->ag_dmamap,
&gatt->ag_physical, &gatt->ag_dmaseg) != 0)
return (NULL);
if (bus_dmamem_map(dmat, &gatt->ag_dmaseg, 1, gatt->ag_size,
(caddr_t *)&gatt->ag_virtual, BUS_DMA_NOWAIT) != 0) {
agp_free_dmamem(dmat, gatt->ag_size, gatt->ag_dmamap,
&gatt->ag_dmaseg);
return (NULL);
}
agp_flush_cache();
return (gatt);
}
void
agp_free_gatt(bus_dma_tag_t dmat, struct agp_gatt *gatt)
{
bus_dmamem_unmap(dmat, (caddr_t)gatt->ag_virtual, gatt->ag_size);
agp_free_dmamem(dmat, gatt->ag_size, gatt->ag_dmamap, &gatt->ag_dmaseg);
free(gatt, M_AGP);
}
int
agp_generic_enable(struct agp_softc *sc, u_int32_t mode)
{
struct pci_attach_args pa;
pcireg_t tstatus, mstatus, command;
int rq, sba, fw, rate, capoff;
if (pci_find_device(&pa, agpvga_match) == 0 ||
pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP,
&capoff, NULL) == 0) {
printf("agp_generic_enable: not an AGP capable device\n");
return (-1);
}
tstatus = pci_conf_read(sc->sc_pc, sc->sc_pcitag,
sc->sc_capoff + AGP_STATUS);
/* display agp mode */
mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag,
capoff + AGP_STATUS);
/* Set RQ to the min of mode, tstatus and mstatus */
rq = AGP_MODE_GET_RQ(mode);
if (AGP_MODE_GET_RQ(tstatus) < rq)
rq = AGP_MODE_GET_RQ(tstatus);
if (AGP_MODE_GET_RQ(mstatus) < rq)
rq = AGP_MODE_GET_RQ(mstatus);
/* Set SBA if all three can deal with SBA */
sba = (AGP_MODE_GET_SBA(tstatus)
& AGP_MODE_GET_SBA(mstatus)
& AGP_MODE_GET_SBA(mode));
/* Similar for FW */
fw = (AGP_MODE_GET_FW(tstatus)
& AGP_MODE_GET_FW(mstatus)
& AGP_MODE_GET_FW(mode));
/* Figure out the max rate */
rate = (AGP_MODE_GET_RATE(tstatus)
& AGP_MODE_GET_RATE(mstatus)
& AGP_MODE_GET_RATE(mode));
if (rate & AGP_MODE_RATE_4x)
rate = AGP_MODE_RATE_4x;
else if (rate & AGP_MODE_RATE_2x)
rate = AGP_MODE_RATE_2x;
else
rate = AGP_MODE_RATE_1x;
/* Construct the new mode word and tell the hardware */
command = AGP_MODE_SET_RQ(0, rq);
command = AGP_MODE_SET_SBA(command, sba);
command = AGP_MODE_SET_FW(command, fw);
command = AGP_MODE_SET_RATE(command, rate);
command = AGP_MODE_SET_AGP(command, 1);
pci_conf_write(sc->sc_pc, sc->sc_pcitag,
sc->sc_capoff + AGP_COMMAND, command);
pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command);
return (0);
}
struct agp_memory *
agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size)
{
struct agp_memory *mem;
if (type != 0) {
printf("agp_generic_alloc_memory: unsupported type %d\n", type);
return (0);
}
mem = malloc(sizeof *mem, M_AGP, M_WAITOK | M_ZERO);
if (bus_dmamap_create(sc->sc_dmat, size, size / PAGE_SIZE + 1,
size, 0, BUS_DMA_NOWAIT, &mem->am_dmamap) != 0) {
free(mem, M_AGP);
return (NULL);
}
mem->am_id = sc->sc_nextid++;
mem->am_size = size;
TAILQ_INSERT_TAIL(&sc->sc_memory, mem, am_link);
sc->sc_allocated += size;
return (mem);
}
int
agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem)
{
if (mem->am_is_bound)
return (EBUSY);
sc->sc_allocated -= mem->am_size;
TAILQ_REMOVE(&sc->sc_memory, mem, am_link);
bus_dmamap_destroy(sc->sc_dmat, mem->am_dmamap);
free(mem, M_AGP);
return (0);
}
int
agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem,
bus_size_t offset)
{
bus_dma_segment_t *segs, *seg;
bus_addr_t apaddr = sc->sc_apaddr + offset;
bus_size_t done, i, j;
int nseg, error;
rw_enter_write(&sc->sc_lock);
if (mem->am_is_bound) {
printf("AGP: memory already bound\n");
rw_exit_write(&sc->sc_lock);
return (EINVAL);
}
if (offset < 0 || (offset & (AGP_PAGE_SIZE - 1)) != 0 ||
offset + mem->am_size > sc->sc_apsize) {
printf("AGP: binding memory at bad offset %#lx\n",
(unsigned long) offset);
rw_exit_write(&sc->sc_lock);
return (EINVAL);
}
/*
* The memory here needs to be directly accessable from the
* AGP video card, so it should be allocated using bus_dma.
* However, it need not be contiguous, since individual pages
* are translated using the GATT.
*/
nseg = (mem->am_size + PAGE_SIZE - 1) / PAGE_SIZE;
segs = malloc(nseg * sizeof *segs, M_AGP, M_WAITOK);
if ((error = bus_dmamem_alloc(sc->sc_dmat, mem->am_size, PAGE_SIZE, 0,
segs, nseg, &mem->am_nseg, BUS_DMA_ZERO | BUS_DMA_WAITOK)) != 0) {
free(segs, M_AGP);
rw_exit_write(&sc->sc_lock);
AGP_DPF("bus_dmamem_alloc failed %d\n", error);
return (error);
}
if ((error = bus_dmamap_load_raw(sc->sc_dmat, mem->am_dmamap, segs,
mem->am_nseg, mem->am_size, BUS_DMA_WAITOK)) != 0) {
bus_dmamem_free(sc->sc_dmat, segs, mem->am_nseg);
free(segs, M_AGP);
rw_exit_write(&sc->sc_lock);
AGP_DPF("bus_dmamap_load failed %d\n", error);
return (error);
}
mem->am_dmaseg = segs;
/*
* Install entries in the GATT, making sure that if
* AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
* aligned to PAGE_SIZE, we don't modify too many GATT
* entries. Flush chipset tlb when done.
*/
done = 0;
for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) {
seg = &mem->am_dmamap->dm_segs[i];
for (j = 0; j < seg->ds_len && (done + j) < mem->am_size;
j += AGP_PAGE_SIZE) {
AGP_DPF("binding offset %#lx to pa %#lx\n",
(unsigned long)(offset + done + j),
(unsigned long)seg->ds_addr + j);
sc->sc_methods->bind_page(sc->sc_chipc,
apaddr + done + j, seg->ds_addr + j, 0);
}
done += seg->ds_len;
}
/*
* Flush the cpu cache since we are providing a new mapping
* for these pages.
*/
agp_flush_cache();
/*
* Make sure the chipset gets the new mappings.
*/
sc->sc_methods->flush_tlb(sc->sc_chipc);
mem->am_offset = offset;
mem->am_is_bound = 1;
rw_exit_write(&sc->sc_lock);
return (0);
}
int
agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem)
{
bus_addr_t apaddr = sc->sc_apaddr + mem->am_offset;
bus_size_t i;
rw_enter_write(&sc->sc_lock);
if (mem->am_is_bound == 0) {
printf("AGP: memory is not bound\n");
rw_exit_write(&sc->sc_lock);
return (EINVAL);
}
/*
* Unbind the individual pages and flush the chipset's
* TLB. Unwire the pages so they can be swapped.
*/
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
sc->sc_methods->unbind_page(sc->sc_chipc, apaddr + i);
agp_flush_cache();
sc->sc_methods->flush_tlb(sc->sc_chipc);
bus_dmamap_unload(sc->sc_dmat, mem->am_dmamap);
bus_dmamem_free(sc->sc_dmat, mem->am_dmaseg, mem->am_nseg);
free(mem->am_dmaseg, M_AGP);
mem->am_offset = 0;
mem->am_is_bound = 0;
rw_exit_write(&sc->sc_lock);
return (0);
}
/*
* Allocates a single-segment block of zeroed, wired dma memory.
*/
int
agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t *mapp,
bus_addr_t *baddr, bus_dma_segment_t *seg)
{
int error, level = 0, nseg;
if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0,
seg, 1, &nseg, BUS_DMA_NOWAIT | BUS_DMA_ZERO)) != 0)
goto out;
level++;
if ((error = bus_dmamap_create(tag, size, nseg, size, 0,
BUS_DMA_NOWAIT, mapp)) != 0)
goto out;
level++;
if ((error = bus_dmamap_load_raw(tag, *mapp, seg, nseg, size,
BUS_DMA_NOWAIT)) != 0)
goto out;
*baddr = (*mapp)->dm_segs[0].ds_addr;
return (0);
out:
switch (level) {
case 2:
bus_dmamap_destroy(tag, *mapp);
/* FALLTHROUGH */
case 1:
bus_dmamem_free(tag, seg, nseg);
break;
default:
break;
}
return (error);
}
void
agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map,
bus_dma_segment_t *seg)
{
bus_dmamap_unload(tag, map);
bus_dmamap_destroy(tag, map);
bus_dmamem_free(tag, seg, 1);
}
/* Helper functions used in both user and kernel APIs */
int
agp_acquire_helper(void *dev, enum agp_acquire_state state)
{
struct agp_softc *sc = (struct agp_softc *)dev;
if (sc->sc_chipc == NULL)
return (EINVAL);
if (sc->sc_state != AGP_ACQUIRE_FREE)
return (EBUSY);
sc->sc_state = state;
return (0);
}
int
agp_release_helper(void *dev, enum agp_acquire_state state)
{
struct agp_softc *sc = (struct agp_softc *)dev;
struct agp_memory* mem;
if (sc->sc_state == AGP_ACQUIRE_FREE)
return (0);
if (sc->sc_state != state)
return (EBUSY);
/*
* Clear out the aperture and free any
* outstanding memory blocks.
*/
TAILQ_FOREACH(mem, &sc->sc_memory, am_link) {
if (mem->am_is_bound) {
printf("agp_release_helper: mem %d is bound\n",
mem->am_id);
agp_unbind_memory(sc, mem);
}
}
sc->sc_state = AGP_ACQUIRE_FREE;
return (0);
}
/* Implementation of the userland ioctl API */
int
agp_info_user(void *dev, agp_info *info)
{
struct agp_softc *sc = (struct agp_softc *) dev;
if (!sc->sc_chipc)
return (ENXIO);
bzero(info, sizeof *info);
info->bridge_id = sc->sc_id;
if (sc->sc_capoff != 0)
info->agp_mode = pci_conf_read(sc->sc_pc, sc->sc_pcitag,
AGP_STATUS + sc->sc_capoff);
else
info->agp_mode = 0; /* i810 doesn't have real AGP */
info->aper_base = sc->sc_apaddr;
info->aper_size = sc->sc_apsize >> 20;
info->pg_total =
info->pg_system = sc->sc_maxmem >> AGP_PAGE_SHIFT;
info->pg_used = sc->sc_allocated >> AGP_PAGE_SHIFT;
return (0);
}
int
agp_setup_user(void *dev, agp_setup *setup)
{
struct agp_softc *sc = dev;
return (agp_enable(sc, setup->agp_mode));
}
int
agp_allocate_user(void *dev, agp_allocate *alloc)
{
struct agp_softc *sc = dev;
struct agp_memory *mem;
size_t size = alloc->pg_count << AGP_PAGE_SHIFT;
if (sc->sc_allocated + size > sc->sc_maxmem)
return (EINVAL);
mem = agp_alloc_memory(sc, alloc->type, size);
if (mem) {
alloc->key = mem->am_id;
alloc->physical = mem->am_physical;
return (0);
} else
return (ENOMEM);
}
int
agp_deallocate_user(void *dev, int id)
{
struct agp_softc *sc = dev;
struct agp_memory *mem;
if ((mem = agp_find_memory(sc, id)) != NULL) {
agp_free_memory(sc, mem);
return (0);
} else
return (ENOENT);
}
int
agp_bind_user(void *dev, agp_bind *bind)
{
struct agp_softc *sc = dev;
struct agp_memory *mem;
if ((mem = agp_find_memory(sc, bind->key)) == NULL)
return (ENOENT);
return (agp_bind_memory(sc, mem, bind->pg_start << AGP_PAGE_SHIFT));
}
int
agp_unbind_user(void *dev, agp_unbind *unbind)
{
struct agp_softc *sc = dev;
struct agp_memory *mem;
if ((mem = agp_find_memory(sc, unbind->key)) == NULL)
return (ENOENT);
return (agp_unbind_memory(sc, mem));
}
/* Implementation of the kernel api */
void *
agp_find_device(int unit)
{
if (unit >= agp_cd.cd_ndevs || unit < 0)
return (NULL);
return (agp_cd.cd_devs[unit]);
}
enum agp_acquire_state
agp_state(void *dev)
{
struct agp_softc *sc = (struct agp_softc *) dev;
return (sc->sc_state);
}
void
agp_get_info(void *dev, struct agp_info *info)
{
struct agp_softc *sc = (struct agp_softc *)dev;
if (sc->sc_capoff != 0)
info->ai_mode = pci_conf_read(sc->sc_pc, sc->sc_pcitag,
AGP_STATUS + sc->sc_capoff);
else
info->ai_mode = 0; /* i810 doesn't have real AGP */
info->ai_aperture_base = sc->sc_apaddr;
info->ai_aperture_size = sc->sc_apsize;
info->ai_memory_allowed = sc->sc_maxmem;
info->ai_memory_used = sc->sc_allocated;
}
int
agp_acquire(void *dev)
{
struct agp_softc *sc = (struct agp_softc *)dev;
return (agp_acquire_helper(sc, AGP_ACQUIRE_KERNEL));
}
int
agp_release(void *dev)
{
struct agp_softc *sc = (struct agp_softc *)dev;
return (agp_release_helper(sc, AGP_ACQUIRE_KERNEL));
}
int
agp_enable(void *dev, u_int32_t mode)
{
struct agp_softc *sc = dev;
int ret;
if (sc->sc_methods->enable != NULL) {
ret = sc->sc_methods->enable(sc->sc_chipc, mode);
} else {
ret = agp_generic_enable(sc, mode);
}
return (ret);
}
void *
agp_alloc_memory(void *dev, int type, vsize_t bytes)
{
struct agp_softc *sc = dev;
struct agp_memory *mem;
if (sc->sc_methods->alloc_memory != NULL) {
mem = sc->sc_methods->alloc_memory(sc->sc_chipc, type, bytes);
} else {
mem = agp_generic_alloc_memory(sc, type, bytes);
}
return (mem);
}
void
agp_free_memory(void *dev, void *handle)
{
struct agp_softc *sc = dev;
struct agp_memory *mem = handle;
if (sc->sc_methods->free_memory != NULL) {
sc->sc_methods->free_memory(sc->sc_chipc, mem);
} else {
agp_generic_free_memory(sc, mem);
}
}
int
agp_bind_memory(void *dev, void *handle, off_t offset)
{
struct agp_softc *sc = dev;
struct agp_memory *mem = handle;
int ret;
if (sc->sc_methods->bind_memory != NULL) {
ret = sc->sc_methods->bind_memory(sc->sc_chipc, mem, offset);
} else {
ret = agp_generic_bind_memory(sc, mem, offset);
}
return (ret);
}
int
agp_unbind_memory(void *dev, void *handle)
{
struct agp_softc *sc = dev;
struct agp_memory *mem = handle;
int ret;
if (sc->sc_methods->unbind_memory != NULL) {
ret = sc->sc_methods->unbind_memory(sc->sc_chipc, mem);
} else {
ret = agp_generic_unbind_memory(sc, mem);
}
return (ret);
}
void
agp_memory_info(void *dev, void *handle, struct agp_memory_info *mi)
{
struct agp_memory *mem = (struct agp_memory *) handle;
mi->ami_size = mem->am_size;
mi->ami_physical = mem->am_physical;
mi->ami_offset = mem->am_offset;
mi->ami_is_bound = mem->am_is_bound;
}