/*- * SPDX-License-Identifier: BSD-2-Clause * * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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 0x167110b9: return ("Ali M1671 host to AGP bridge"); case 0x154110b9: return ("Ali M1541 host to AGP bridge"); case 0x162110b9: return ("Ali M1621 host to AGP bridge"); } return NULL; } static int agp_ali_probe(device_t dev) { const char *desc; if (resource_disabled("agp", device_get_unit(dev))) return (ENXIO); desc = agp_ali_match(dev); if (desc) { device_set_desc(dev, desc); return BUS_PROBE_DEFAULT; } 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; u_int32_t attbase; error = agp_generic_attach(dev); if (error) return error; sc->initial_aperture = AGP_GET_APERTURE(dev); if (sc->initial_aperture == 0) { device_printf(dev, "bad initial aperture size, disabling\n"); return ENXIO; } 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. */ attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical | (attbase & 0xfff), 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); u_int32_t attbase; agp_free_cdev(dev); /* 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); attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4); agp_free_gatt(sc->gatt); agp_free_res(dev); 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 nitems(agp_ali_table) 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) & 0xf; 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; u_int32_t attbase; for (i = 0; i < AGP_ALI_TABLE_SIZE; i++) if (agp_ali_table[i] == aperture) break; if (i == AGP_ALI_TABLE_SIZE) return EINVAL; attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4); return 0; } static int agp_ali_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) { struct agp_ali_softc *sc = device_get_softc(dev); if (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, vm_offset_t offset) { struct agp_ali_softc *sc = device_get_softc(dev); if (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), }; DRIVER_MODULE(agp_ali, hostb, agp_ali_driver, 0, 0); MODULE_DEPEND(agp_ali, agp, 1, 1, 1); MODULE_DEPEND(agp_ali, pci, 1, 1, 1);