/*- * 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_via.c,v 1.1.2.2 2001/10/04 09:53:04 ru Exp $ * $DragonFly: src/sys/dev/agp/agp_via.c,v 1.5 2004/07/04 00:24:52 dillon Exp $ */ #include "opt_bus.h" #include "opt_pci.h" #include #include #include #include #include #include #include #include #include "agppriv.h" #include "agpreg.h" #include #include #include #define REG_GARTCTRL 0 #define REG_APSIZE 1 #define REG_ATTBASE 2 struct agp_via_softc { struct agp_softc agp; u_int32_t initial_aperture; /* aperture size at startup */ struct agp_gatt *gatt; int *regs; }; static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, AGP_VIA_ATTBASE }; static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, AGP3_VIA_ATTBASE }; static const char* agp_via_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 0x03051106: return ("VIA 82C8363 (Apollo KT133A) host to PCI bridge"); case 0x05011106: return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); case 0x05971106: return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); case 0x05981106: return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); case 0x06051106: return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); case 0x06911106: return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); case 0x31881106: return ("VIA 8385 host to PCI bridge"); }; if (pci_get_vendor(dev) == 0x1106) return ("VIA Generic host to PCI bridge"); return NULL; } static int agp_via_probe(device_t dev) { const char *desc; desc = agp_via_match(dev); if (desc) { device_verbose(dev); device_set_desc(dev, desc); return 0; } return ENXIO; } static int agp_via_attach(device_t dev) { struct agp_via_softc *sc = device_get_softc(dev); struct agp_gatt *gatt; int error; switch (pci_get_devid(dev)) { case 0x31881106: sc->regs = via_v3_regs; break; default: sc->regs = via_v2_regs; break; } 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, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); /* Enable the aperture. */ pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); return 0; } static int agp_via_detach(device_t dev) { struct agp_via_softc *sc = device_get_softc(dev); int error; error = agp_generic_detach(dev); if (error) return error; pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); AGP_SET_APERTURE(dev, sc->initial_aperture); agp_free_gatt(sc->gatt); return 0; } static u_int32_t agp_via_get_aperture(device_t dev) { struct agp_via_softc *sc = device_get_softc(dev); u_int32_t apsize; apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; /* * The size is determined by the number of low bits of * register APBASE which are forced to zero. The low 20 bits * are always forced to zero and each zero bit in the apsize * field just read forces the corresponding bit in the 27:20 * to be zero. We calculate the aperture size accordingly. */ return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; } static int agp_via_set_aperture(device_t dev, u_int32_t aperture) { struct agp_via_softc *sc = device_get_softc(dev); u_int32_t apsize; /* * Reverse the magic from get_aperture. */ apsize = ((aperture - 1) >> 20) ^ 0xff; /* * Double check for sanity. */ if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) return EINVAL; pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); return 0; } static int agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) { struct agp_via_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_via_unbind_page(device_t dev, int offset) { struct agp_via_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_via_flush_tlb(device_t dev) { struct agp_via_softc *sc = device_get_softc(dev); pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); } static device_method_t agp_via_methods[] = { /* Device interface */ DEVMETHOD(device_probe, agp_via_probe), DEVMETHOD(device_attach, agp_via_attach), DEVMETHOD(device_detach, agp_via_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_via_get_aperture), DEVMETHOD(agp_set_aperture, agp_via_set_aperture), DEVMETHOD(agp_bind_page, agp_via_bind_page), DEVMETHOD(agp_unbind_page, agp_via_unbind_page), DEVMETHOD(agp_flush_tlb, agp_via_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_via_driver = { "agp", agp_via_methods, sizeof(struct agp_via_softc), }; static devclass_t agp_devclass; DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0); MODULE_DEPEND(agp_via, agp, 1, 1, 1); MODULE_DEPEND(agp_via, pci, 1, 1, 1);