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author | dfr <dfr@FreeBSD.org> | 2000-06-09 16:04:30 +0000 |
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committer | dfr <dfr@FreeBSD.org> | 2000-06-09 16:04:30 +0000 |
commit | ab33dfac0143d5afabdb2d640b8d7d47c43609f4 (patch) | |
tree | 7d9995e89a1113f6d052f26ef4daa5686f8efb76 /sys/dev/agp/agp_ali.c | |
parent | fe0cef0780df985c05e3db3351ed16ef482b7c6a (diff) | |
download | FreeBSD-src-ab33dfac0143d5afabdb2d640b8d7d47c43609f4.zip FreeBSD-src-ab33dfac0143d5afabdb2d640b8d7d47c43609f4.tar.gz |
A driver for programming the AGP hardware. This is only very lightly
tested on Intel BX chipsets only. The other agp minidrivers are totally
untested.
The programming api is a subset of the Linux api and is only intended to
be enough for the X server to use. There is also an in-kernel api for the
use of other kernel modules such as the 3D DRI.
Diffstat (limited to 'sys/dev/agp/agp_ali.c')
-rw-r--r-- | sys/dev/agp/agp_ali.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/sys/dev/agp/agp_ali.c b/sys/dev/agp/agp_ali.c new file mode 100644 index 0000000..86e070e --- /dev/null +++ b/sys/dev/agp/agp_ali.c @@ -0,0 +1,264 @@ +/*- + * 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. + * + * $FreeBSD$ + */ + +#include "opt_bus.h" +#include "opt_pci.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/kernel.h> +#include <sys/bus.h> +#include <sys/lock.h> + +#include <pci/pcivar.h> +#include <pci/pcireg.h> +#include <pci/agppriv.h> +#include <pci/agpreg.h> + +#include <vm/vm.h> +#include <vm/vm_object.h> +#include <vm/pmap.h> + +struct agp_ali_softc { + struct agp_softc agp; + u_int32_t initial_aperture; /* aperture size at startup */ + struct agp_gatt *gatt; +}; + +static const char* +agp_ali_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 0x154110b9: + return ("Ali M1541 host to AGP bridge"); + }; + + if (pci_get_vendor(dev) == 0x10b9) + return ("Ali Generic host to PCI bridge"); + + return NULL; +} + +static int +agp_ali_probe(device_t dev) +{ + const char *desc; + + desc = agp_ali_match(dev); + if (desc) { + device_verbose(dev); + device_set_desc(dev, desc); + return 0; + } + + return ENXIO; +} + +static int +agp_ali_attach(device_t dev) +{ + struct agp_ali_softc *sc = device_get_softc(dev); + struct agp_gatt *gatt; + int error; + + error = agp_generic_attach(dev); + if (error) + return error; + + sc->initial_aperture = AGP_GET_APERTURE(dev); + + for (;;) { + gatt = agp_alloc_gatt(dev); + if (gatt) + break; + + /* + * Probably contigmalloc failure. Try reducing the + * aperture so that the gatt size reduces. + */ + if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { + agp_generic_detach(dev); + return ENOMEM; + } + } + sc->gatt = gatt; + + /* Install the gatt. */ + pci_write_config(dev, AGP_ALI_ATTBASE, + (gatt->ag_physical + | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)), + 4); + + /* Enable the TLB. */ + pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); + + return 0; +} + +static int +agp_ali_detach(device_t dev) +{ + struct agp_ali_softc *sc = device_get_softc(dev); + int error; + + error = agp_generic_detach(dev); + if (error) + return error; + + /* Disable the TLB.. */ + pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); + + /* Put the aperture back the way it started. */ + AGP_SET_APERTURE(dev, sc->initial_aperture); + pci_write_config(dev, AGP_ALI_ATTBASE, + pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff, + 4); + + agp_free_gatt(sc->gatt); + return 0; +} + +#define M 1024*1024 + +static 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])) + +static u_int32_t +agp_ali_get_aperture(device_t dev) +{ + /* + * The aperture size is derived from the low bits of attbase. + * I'm not sure this is correct.. + */ + int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff; + if (i >= agp_ali_table_size) + return 0; + return agp_ali_table[i]; +} + +static int +agp_ali_set_aperture(device_t dev, u_int32_t aperture) +{ + int i; + + for (i = 0; i < agp_ali_table_size; i++) + if (agp_ali_table[i] == aperture) + break; + if (i == agp_ali_table_size) + return EINVAL; + + pci_write_config(dev, AGP_ALI_ATTBASE, + ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff) + | i), 4); + return 0; +} + +static int +agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical) +{ + struct agp_ali_softc *sc = device_get_softc(dev); + + if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) + return EINVAL; + + sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; + return 0; +} + +static int +agp_ali_unbind_page(device_t dev, int offset) +{ + struct agp_ali_softc *sc = device_get_softc(dev); + + if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) + return EINVAL; + + sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; + return 0; +} + +static void +agp_ali_flush_tlb(device_t dev) +{ + pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); + pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); +} + +static device_method_t agp_ali_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, agp_ali_probe), + DEVMETHOD(device_attach, agp_ali_attach), + DEVMETHOD(device_detach, agp_ali_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_ali_get_aperture), + DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), + DEVMETHOD(agp_bind_page, agp_ali_bind_page), + DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), + DEVMETHOD(agp_flush_tlb, agp_ali_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_ali_driver = { + "agp", + agp_ali_methods, + sizeof(struct agp_ali_softc), +}; + +static devclass_t agp_devclass; + +DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0); |