agp_intel.c revision 1.2.2.2
1 1.2.2.2 thorpej /* $NetBSD: agp_intel.c,v 1.2.2.2 2001/09/13 01:15:51 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 1.2.2.2 thorpej #include <sys/param.h> 32 1.2.2.2 thorpej #include <sys/systm.h> 33 1.2.2.2 thorpej #include <sys/malloc.h> 34 1.2.2.2 thorpej #include <sys/kernel.h> 35 1.2.2.2 thorpej #include <sys/lock.h> 36 1.2.2.2 thorpej #include <sys/proc.h> 37 1.2.2.2 thorpej #include <sys/agpio.h> 38 1.2.2.2 thorpej #include <sys/device.h> 39 1.2.2.2 thorpej #include <sys/agpio.h> 40 1.2.2.2 thorpej 41 1.2.2.2 thorpej #include <uvm/uvm_extern.h> 42 1.2.2.2 thorpej 43 1.2.2.2 thorpej #include <dev/pci/pcivar.h> 44 1.2.2.2 thorpej #include <dev/pci/pcireg.h> 45 1.2.2.2 thorpej #include <dev/pci/agpvar.h> 46 1.2.2.2 thorpej #include <dev/pci/agpreg.h> 47 1.2.2.2 thorpej 48 1.2.2.2 thorpej #include <machine/bus.h> 49 1.2.2.2 thorpej 50 1.2.2.2 thorpej struct agp_intel_softc { 51 1.2.2.2 thorpej u_int32_t initial_aperture; /* aperture size at startup */ 52 1.2.2.2 thorpej struct agp_gatt *gatt; 53 1.2.2.2 thorpej }; 54 1.2.2.2 thorpej 55 1.2.2.2 thorpej static u_int32_t agp_intel_get_aperture(struct agp_softc *); 56 1.2.2.2 thorpej static int agp_intel_set_aperture(struct agp_softc *, u_int32_t); 57 1.2.2.2 thorpej static int agp_intel_bind_page(struct agp_softc *, off_t, bus_addr_t); 58 1.2.2.2 thorpej static int agp_intel_unbind_page(struct agp_softc *, off_t); 59 1.2.2.2 thorpej static void agp_intel_flush_tlb(struct agp_softc *); 60 1.2.2.2 thorpej 61 1.2.2.2 thorpej struct agp_methods agp_intel_methods = { 62 1.2.2.2 thorpej agp_intel_get_aperture, 63 1.2.2.2 thorpej agp_intel_set_aperture, 64 1.2.2.2 thorpej agp_intel_bind_page, 65 1.2.2.2 thorpej agp_intel_unbind_page, 66 1.2.2.2 thorpej agp_intel_flush_tlb, 67 1.2.2.2 thorpej agp_generic_enable, 68 1.2.2.2 thorpej agp_generic_alloc_memory, 69 1.2.2.2 thorpej agp_generic_free_memory, 70 1.2.2.2 thorpej agp_generic_bind_memory, 71 1.2.2.2 thorpej agp_generic_unbind_memory, 72 1.2.2.2 thorpej }; 73 1.2.2.2 thorpej 74 1.2.2.2 thorpej 75 1.2.2.2 thorpej int 76 1.2.2.2 thorpej agp_intel_match(struct device *parent, struct cfdata *match, void *aux) 77 1.2.2.2 thorpej { 78 1.2.2.2 thorpej struct pci_attach_args *pa = aux; 79 1.2.2.2 thorpej 80 1.2.2.2 thorpej if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, NULL, NULL) 81 1.2.2.2 thorpej == 0) 82 1.2.2.2 thorpej return 0; 83 1.2.2.2 thorpej 84 1.2.2.2 thorpej return 1; 85 1.2.2.2 thorpej } 86 1.2.2.2 thorpej 87 1.2.2.2 thorpej int 88 1.2.2.2 thorpej agp_intel_attach(struct device *parent, struct device *self, void *aux) 89 1.2.2.2 thorpej { 90 1.2.2.2 thorpej struct agp_softc *sc = (struct agp_softc *)self; 91 1.2.2.2 thorpej struct pci_attach_args *pa= aux; 92 1.2.2.2 thorpej struct agp_intel_softc *isc; 93 1.2.2.2 thorpej struct agp_gatt *gatt; 94 1.2.2.2 thorpej pcireg_t reg; 95 1.2.2.2 thorpej 96 1.2.2.2 thorpej isc = malloc(sizeof *isc, M_AGP, M_NOWAIT); 97 1.2.2.2 thorpej if (isc == NULL) { 98 1.2.2.2 thorpej printf(": can't allocate chipset-specific softc\n"); 99 1.2.2.2 thorpej return ENOMEM; 100 1.2.2.2 thorpej } 101 1.2.2.2 thorpej memset(isc, 0, sizeof *isc); 102 1.2.2.2 thorpej 103 1.2.2.2 thorpej sc->as_methods = &agp_intel_methods; 104 1.2.2.2 thorpej sc->as_chipc = isc; 105 1.2.2.2 thorpej 106 1.2.2.2 thorpej pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 107 1.2.2.2 thorpej NULL); 108 1.2.2.2 thorpej 109 1.2.2.2 thorpej if (agp_map_aperture(pa, sc) != 0) { 110 1.2.2.2 thorpej printf(": can't map aperture\n"); 111 1.2.2.2 thorpej free(isc, M_AGP); 112 1.2.2.2 thorpej sc->as_chipc = NULL; 113 1.2.2.2 thorpej return ENXIO; 114 1.2.2.2 thorpej } 115 1.2.2.2 thorpej 116 1.2.2.2 thorpej isc->initial_aperture = AGP_GET_APERTURE(sc); 117 1.2.2.2 thorpej 118 1.2.2.2 thorpej for (;;) { 119 1.2.2.2 thorpej gatt = agp_alloc_gatt(sc); 120 1.2.2.2 thorpej if (gatt) 121 1.2.2.2 thorpej break; 122 1.2.2.2 thorpej 123 1.2.2.2 thorpej /* 124 1.2.2.2 thorpej * Probably contigmalloc failure. Try reducing the 125 1.2.2.2 thorpej * aperture so that the gatt size reduces. 126 1.2.2.2 thorpej */ 127 1.2.2.2 thorpej if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 128 1.2.2.2 thorpej agp_generic_detach(sc); 129 1.2.2.2 thorpej printf(": failed to set aperture\n"); 130 1.2.2.2 thorpej return ENOMEM; 131 1.2.2.2 thorpej } 132 1.2.2.2 thorpej } 133 1.2.2.2 thorpej isc->gatt = gatt; 134 1.2.2.2 thorpej 135 1.2.2.2 thorpej /* Install the gatt. */ 136 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 137 1.2.2.2 thorpej gatt->ag_physical); 138 1.2.2.2 thorpej 139 1.2.2.2 thorpej /* Enable things, clear errors etc. */ 140 1.2.2.2 thorpej /* XXXfvdl get rid of the magic constants */ 141 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 142 1.2.2.2 thorpej reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 143 1.2.2.2 thorpej reg &= ~(1 << 10); 144 1.2.2.2 thorpej reg |= (1 << 9); 145 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 146 1.2.2.2 thorpej 147 1.2.2.2 thorpej reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_STS); 148 1.2.2.2 thorpej reg &= ~0x00ff0000; 149 1.2.2.2 thorpej reg |= (7 << 16); 150 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_STS, reg); 151 1.2.2.2 thorpej 152 1.2.2.2 thorpej return 0; 153 1.2.2.2 thorpej } 154 1.2.2.2 thorpej 155 1.2.2.2 thorpej #if 0 156 1.2.2.2 thorpej static int 157 1.2.2.2 thorpej agp_intel_detach(struct agp_softc *sc) 158 1.2.2.2 thorpej { 159 1.2.2.2 thorpej int error; 160 1.2.2.2 thorpej pcireg_t reg; 161 1.2.2.2 thorpej struct agp_intel_softc *isc = sc->as_chipc; 162 1.2.2.2 thorpej 163 1.2.2.2 thorpej error = agp_generic_detach(sc); 164 1.2.2.2 thorpej if (error) 165 1.2.2.2 thorpej return error; 166 1.2.2.2 thorpej 167 1.2.2.2 thorpej reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 168 1.2.2.2 thorpej reg &= ~(1 << 9); 169 1.2.2.2 thorpej printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); 170 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 171 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 172 1.2.2.2 thorpej AGP_SET_APERTURE(sc, isc->initial_aperture); 173 1.2.2.2 thorpej agp_free_gatt(sc, isc->gatt); 174 1.2.2.2 thorpej 175 1.2.2.2 thorpej return 0; 176 1.2.2.2 thorpej } 177 1.2.2.2 thorpej #endif 178 1.2.2.2 thorpej 179 1.2.2.2 thorpej static u_int32_t 180 1.2.2.2 thorpej agp_intel_get_aperture(struct agp_softc *sc) 181 1.2.2.2 thorpej { 182 1.2.2.2 thorpej u_int32_t apsize; 183 1.2.2.2 thorpej 184 1.2.2.2 thorpej apsize = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE) & 0x1f; 185 1.2.2.2 thorpej 186 1.2.2.2 thorpej /* 187 1.2.2.2 thorpej * The size is determined by the number of low bits of 188 1.2.2.2 thorpej * register APBASE which are forced to zero. The low 22 bits 189 1.2.2.2 thorpej * are always forced to zero and each zero bit in the apsize 190 1.2.2.2 thorpej * field just read forces the corresponding bit in the 27:22 191 1.2.2.2 thorpej * to be zero. We calculate the aperture size accordingly. 192 1.2.2.2 thorpej */ 193 1.2.2.2 thorpej return (((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1; 194 1.2.2.2 thorpej } 195 1.2.2.2 thorpej 196 1.2.2.2 thorpej static int 197 1.2.2.2 thorpej agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 198 1.2.2.2 thorpej { 199 1.2.2.2 thorpej u_int32_t apsize; 200 1.2.2.2 thorpej pcireg_t reg; 201 1.2.2.2 thorpej 202 1.2.2.2 thorpej /* 203 1.2.2.2 thorpej * Reverse the magic from get_aperture. 204 1.2.2.2 thorpej */ 205 1.2.2.2 thorpej apsize = ((aperture - 1) >> 22) ^ 0x1f; 206 1.2.2.2 thorpej 207 1.2.2.2 thorpej /* 208 1.2.2.2 thorpej * Double check for sanity. 209 1.2.2.2 thorpej */ 210 1.2.2.2 thorpej if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) 211 1.2.2.2 thorpej return EINVAL; 212 1.2.2.2 thorpej 213 1.2.2.2 thorpej reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 214 1.2.2.2 thorpej reg = (reg & 0xffffff00) | apsize; 215 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, reg); 216 1.2.2.2 thorpej 217 1.2.2.2 thorpej return 0; 218 1.2.2.2 thorpej } 219 1.2.2.2 thorpej 220 1.2.2.2 thorpej static int 221 1.2.2.2 thorpej agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 222 1.2.2.2 thorpej { 223 1.2.2.2 thorpej struct agp_intel_softc *isc = sc->as_chipc; 224 1.2.2.2 thorpej 225 1.2.2.2 thorpej if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 226 1.2.2.2 thorpej return EINVAL; 227 1.2.2.2 thorpej 228 1.2.2.2 thorpej isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 229 1.2.2.2 thorpej return 0; 230 1.2.2.2 thorpej } 231 1.2.2.2 thorpej 232 1.2.2.2 thorpej static int 233 1.2.2.2 thorpej agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 234 1.2.2.2 thorpej { 235 1.2.2.2 thorpej struct agp_intel_softc *isc = sc->as_chipc; 236 1.2.2.2 thorpej 237 1.2.2.2 thorpej if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 238 1.2.2.2 thorpej return EINVAL; 239 1.2.2.2 thorpej 240 1.2.2.2 thorpej isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 241 1.2.2.2 thorpej return 0; 242 1.2.2.2 thorpej } 243 1.2.2.2 thorpej 244 1.2.2.2 thorpej static void 245 1.2.2.2 thorpej agp_intel_flush_tlb(struct agp_softc *sc) 246 1.2.2.2 thorpej { 247 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2200); 248 1.2.2.2 thorpej pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 249 1.2.2.2 thorpej } 250
Indexes created Thu Oct 02 07:10:07 GMT 2025