agp_intel.c revision 1.2.2.3
1 1.2.2.3 thorpej /* $NetBSD: agp_intel.c,v 1.2.2.3 2002/01/10 19:56:25 thorpej Exp $ */ 2 1.2.2.2 thorpej 3 1.2.2.2 thorpej /*- 4 1.2.2.2 thorpej * Copyright (c) 2000 Doug Rabson 5 1.2.2.2 thorpej * All rights reserved. 6 1.2.2.2 thorpej * 7 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 9 1.2.2.2 thorpej * are met: 10 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 15 1.2.2.2 thorpej * 16 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.2.2.2 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.2.2.2 thorpej * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.2.2.2 thorpej * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.2.2.2 thorpej * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.2.2.2 thorpej * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.2.2.2 thorpej * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.2.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.2.2.2 thorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 thorpej * SUCH DAMAGE. 27 1.2.2.2 thorpej * 28 1.2.2.2 thorpej * $FreeBSD: src/sys/pci/agp_intel.c,v 1.4 2001/07/05 21:28:47 jhb Exp $ 29 1.2.2.2 thorpej */ 30 1.2.2.2 thorpej 31 1.2.2.3 thorpej #include <sys/cdefs.h> 32 1.2.2.3 thorpej __KERNEL_RCSID(0, "$NetBSD: agp_intel.c,v 1.2.2.3 2002/01/10 19:56:25 thorpej Exp $"); 33 1.2.2.3 thorpej 34 1.2.2.2 thorpej #include <sys/param.h> 35 1.2.2.2 thorpej #include <sys/systm.h> 36 1.2.2.2 thorpej #include <sys/malloc.h> 37 1.2.2.2 thorpej #include <sys/kernel.h> 38 1.2.2.2 thorpej #include <sys/lock.h> 39 1.2.2.2 thorpej #include <sys/proc.h> 40 1.2.2.2 thorpej #include <sys/agpio.h> 41 1.2.2.2 thorpej #include <sys/device.h> 42 1.2.2.2 thorpej #include <sys/agpio.h> 43 1.2.2.2 thorpej 44 1.2.2.2 thorpej #include <uvm/uvm_extern.h> 45 1.2.2.2 thorpej 46 1.2.2.2 thorpej #include <dev/pci/pcivar.h> 47 1.2.2.2 thorpej #include <dev/pci/pcireg.h> 48 1.2.2.2 thorpej #include <dev/pci/agpvar.h> 49 1.2.2.2 thorpej #include <dev/pci/agpreg.h> 50 1.2.2.2 thorpej 51 1.2.2.2 thorpej #include <machine/bus.h> 52 1.2.2.2 thorpej 53 1.2.2.2 thorpej struct agp_intel_softc { 54 1.2.2.2 thorpej u_int32_t initial_aperture; /* aperture size at startup */ 55 1.2.2.2 thorpej struct agp_gatt *gatt; 56 1.2.2.2 thorpej }; 57 1.2.2.2 thorpej 58 1.2.2.2 thorpej static u_int32_t agp_intel_get_aperture(struct agp_softc *); 59 1.2.2.2 thorpej static int agp_intel_set_aperture(struct agp_softc *, u_int32_t); 60 1.2.2.2 thorpej static int agp_intel_bind_page(struct agp_softc *, off_t, bus_addr_t); 61 1.2.2.2 thorpej static int agp_intel_unbind_page(struct agp_softc *, off_t); 62 1.2.2.2 thorpej static void agp_intel_flush_tlb(struct agp_softc *); 63 1.2.2.2 thorpej 64 1.2.2.2 thorpej struct agp_methods agp_intel_methods = { 65 1.2.2.2 thorpej agp_intel_get_aperture, 66 1.2.2.2 thorpej agp_intel_set_aperture, 67 1.2.2.2 thorpej agp_intel_bind_page, 68 1.2.2.2 thorpej agp_intel_unbind_page, 69 1.2.2.2 thorpej agp_intel_flush_tlb, 70 1.2.2.2 thorpej agp_generic_enable, 71 1.2.2.2 thorpej agp_generic_alloc_memory, 72 1.2.2.2 thorpej agp_generic_free_memory, 73 1.2.2.2 thorpej agp_generic_bind_memory, 74 1.2.2.2 thorpej agp_generic_unbind_memory, 75 1.2.2.2 thorpej }; 76 1.2.2.2 thorpej 77 1.2.2.2 thorpej int 78 1.2.2.2 thorpej agp_intel_attach(struct device *parent, struct device *self, void *aux) 79 1.2.2.2 thorpej { 80 1.2.2.2 thorpej struct agp_softc *sc = (struct agp_softc *)self; 81 1.2.2.2 thorpej struct pci_attach_args *pa= aux; 82 1.2.2.2 thorpej struct agp_intel_softc *isc; 83 1.2.2.2 thorpej struct agp_gatt *gatt; 84 1.2.2.2 thorpej pcireg_t reg; 85 1.2.2.2 thorpej 86 1.2.2.2 thorpej isc = malloc(sizeof *isc, M_AGP, M_NOWAIT); 87 1.2.2.2 thorpej if (isc == NULL) { 88 1.2.2.2 thorpej printf(": can't allocate chipset-specific softc\n"); 89 1.2.2.2 thorpej return ENOMEM; 90 1.2.2.2 thorpej } 91 1.2.2.2 thorpej memset(isc, 0, sizeof *isc); 92 1.2.2.2 thorpej 93 1.2.2.2 thorpej sc->as_methods = &agp_intel_methods; 94 1.2.2.2 thorpej sc->as_chipc = isc; 95 1.2.2.2 thorpej 96 1.2.2.2 thorpej pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 97 1.2.2.2 thorpej NULL); 98 1.2.2.2 thorpej 99 1.2.2.2 thorpej if (agp_map_aperture(pa, sc) != 0) { 100 1.2.2.2 thorpej printf(": can't map aperture\n"); 101 1.2.2.2 thorpej free(isc, M_AGP); 102 1.2.2.2 thorpej sc->as_chipc = NULL; 103 1.2.2.2 thorpej return ENXIO; 104 1.2.2.2 thorpej } 105 1.2.2.2 thorpej 106 1.2.2.2 thorpej isc->initial_aperture = AGP_GET_APERTURE(sc); 107 1.2.2.2 thorpej 108 1.2.2.2 thorpej for (;;) { 109 1.2.2.2 thorpej gatt = agp_alloc_gatt(sc); 110 1.2.2.2 thorpej if (gatt) 111 1.2.2.2 thorpej break; 112 1.2.2.2 thorpej 113 1.2.2.2 thorpej /* 114 1.2.2.2 thorpej * Probably contigmalloc failure. Try reducing the 115 1.2.2.2 thorpej * aperture so that the gatt size reduces. 116 1.2.2.2 thorpej */ 117 1.2.2.2 thorpej if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 118 1.2.2.2 thorpej agp_generic_detach(sc); 119 1.2.2.2 thorpej printf(": failed to set aperture\n"); 120 1.2.2.2 thorpej return ENOMEM; 121 1.2.2.2 thorpej } 122 1.2.2.2 thorpej } 123 1.2.2.2 thorpej isc->gatt = gatt; 124 1.2.2.2 thorpej 125 1.2.2.2 thorpej /* Install the gatt. */ 126 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 127 1.2.2.2 thorpej gatt->ag_physical); 128 1.2.2.2 thorpej 129 1.2.2.2 thorpej /* Enable things, clear errors etc. */ 130 1.2.2.2 thorpej /* XXXfvdl get rid of the magic constants */ 131 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 132 1.2.2.2 thorpej reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 133 1.2.2.2 thorpej reg &= ~(1 << 10); 134 1.2.2.2 thorpej reg |= (1 << 9); 135 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 136 1.2.2.2 thorpej 137 1.2.2.2 thorpej reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_STS); 138 1.2.2.2 thorpej reg &= ~0x00ff0000; 139 1.2.2.2 thorpej reg |= (7 << 16); 140 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_STS, reg); 141 1.2.2.2 thorpej 142 1.2.2.2 thorpej return 0; 143 1.2.2.2 thorpej } 144 1.2.2.2 thorpej 145 1.2.2.2 thorpej #if 0 146 1.2.2.2 thorpej static int 147 1.2.2.2 thorpej agp_intel_detach(struct agp_softc *sc) 148 1.2.2.2 thorpej { 149 1.2.2.2 thorpej int error; 150 1.2.2.2 thorpej pcireg_t reg; 151 1.2.2.2 thorpej struct agp_intel_softc *isc = sc->as_chipc; 152 1.2.2.2 thorpej 153 1.2.2.2 thorpej error = agp_generic_detach(sc); 154 1.2.2.2 thorpej if (error) 155 1.2.2.2 thorpej return error; 156 1.2.2.2 thorpej 157 1.2.2.2 thorpej reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 158 1.2.2.2 thorpej reg &= ~(1 << 9); 159 1.2.2.2 thorpej printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); 160 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 161 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 162 1.2.2.2 thorpej AGP_SET_APERTURE(sc, isc->initial_aperture); 163 1.2.2.2 thorpej agp_free_gatt(sc, isc->gatt); 164 1.2.2.2 thorpej 165 1.2.2.2 thorpej return 0; 166 1.2.2.2 thorpej } 167 1.2.2.2 thorpej #endif 168 1.2.2.2 thorpej 169 1.2.2.2 thorpej static u_int32_t 170 1.2.2.2 thorpej agp_intel_get_aperture(struct agp_softc *sc) 171 1.2.2.2 thorpej { 172 1.2.2.2 thorpej u_int32_t apsize; 173 1.2.2.2 thorpej 174 1.2.2.2 thorpej apsize = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE) & 0x1f; 175 1.2.2.2 thorpej 176 1.2.2.2 thorpej /* 177 1.2.2.2 thorpej * The size is determined by the number of low bits of 178 1.2.2.2 thorpej * register APBASE which are forced to zero. The low 22 bits 179 1.2.2.2 thorpej * are always forced to zero and each zero bit in the apsize 180 1.2.2.2 thorpej * field just read forces the corresponding bit in the 27:22 181 1.2.2.2 thorpej * to be zero. We calculate the aperture size accordingly. 182 1.2.2.2 thorpej */ 183 1.2.2.2 thorpej return (((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1; 184 1.2.2.2 thorpej } 185 1.2.2.2 thorpej 186 1.2.2.2 thorpej static int 187 1.2.2.2 thorpej agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 188 1.2.2.2 thorpej { 189 1.2.2.2 thorpej u_int32_t apsize; 190 1.2.2.2 thorpej pcireg_t reg; 191 1.2.2.2 thorpej 192 1.2.2.2 thorpej /* 193 1.2.2.2 thorpej * Reverse the magic from get_aperture. 194 1.2.2.2 thorpej */ 195 1.2.2.2 thorpej apsize = ((aperture - 1) >> 22) ^ 0x1f; 196 1.2.2.2 thorpej 197 1.2.2.2 thorpej /* 198 1.2.2.2 thorpej * Double check for sanity. 199 1.2.2.2 thorpej */ 200 1.2.2.2 thorpej if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) 201 1.2.2.2 thorpej return EINVAL; 202 1.2.2.2 thorpej 203 1.2.2.2 thorpej reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 204 1.2.2.2 thorpej reg = (reg & 0xffffff00) | apsize; 205 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, reg); 206 1.2.2.2 thorpej 207 1.2.2.2 thorpej return 0; 208 1.2.2.2 thorpej } 209 1.2.2.2 thorpej 210 1.2.2.2 thorpej static int 211 1.2.2.2 thorpej agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 212 1.2.2.2 thorpej { 213 1.2.2.2 thorpej struct agp_intel_softc *isc = sc->as_chipc; 214 1.2.2.2 thorpej 215 1.2.2.2 thorpej if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 216 1.2.2.2 thorpej return EINVAL; 217 1.2.2.2 thorpej 218 1.2.2.2 thorpej isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 219 1.2.2.2 thorpej return 0; 220 1.2.2.2 thorpej } 221 1.2.2.2 thorpej 222 1.2.2.2 thorpej static int 223 1.2.2.2 thorpej agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 224 1.2.2.2 thorpej { 225 1.2.2.2 thorpej struct agp_intel_softc *isc = sc->as_chipc; 226 1.2.2.2 thorpej 227 1.2.2.2 thorpej if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 228 1.2.2.2 thorpej return EINVAL; 229 1.2.2.2 thorpej 230 1.2.2.2 thorpej isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 231 1.2.2.2 thorpej return 0; 232 1.2.2.2 thorpej } 233 1.2.2.2 thorpej 234 1.2.2.2 thorpej static void 235 1.2.2.2 thorpej agp_intel_flush_tlb(struct agp_softc *sc) 236 1.2.2.2 thorpej { 237 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2200); 238 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 239 1.2.2.2 thorpej } 240
Indexes created Thu Oct 02 07:10:07 GMT 2025