agp_intel.c revision 1.1
1 /* $NetBSD: agp_intel.c,v 1.1 2001/09/10 10:01:02 fvdl Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/sys/pci/agp_intel.c,v 1.4 2001/07/05 21:28:47 jhb Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/lock.h> 36 #include <sys/proc.h> 37 #include <sys/agpio.h> 38 #include <sys/device.h> 39 #include <sys/agpio.h> 40 41 #include <uvm/uvm_extern.h> 42 43 #include <dev/pci/pcivar.h> 44 #include <dev/pci/pcireg.h> 45 #include <dev/pci/agpvar.h> 46 #include <dev/pci/agpreg.h> 47 48 #include <machine/bus.h> 49 50 struct agp_intel_softc { 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53 }; 54 55 static u_int32_t agp_intel_get_aperture(struct agp_softc *); 56 static int agp_intel_set_aperture(struct agp_softc *, u_int32_t); 57 static int agp_intel_bind_page(struct agp_softc *, off_t, bus_addr_t); 58 static int agp_intel_unbind_page(struct agp_softc *, off_t); 59 static void agp_intel_flush_tlb(struct agp_softc *); 60 61 struct agp_methods agp_intel_methods = { 62 agp_intel_get_aperture, 63 agp_intel_set_aperture, 64 agp_intel_bind_page, 65 agp_intel_unbind_page, 66 agp_intel_flush_tlb, 67 agp_generic_enable, 68 agp_generic_alloc_memory, 69 agp_generic_free_memory, 70 agp_generic_bind_memory, 71 agp_generic_unbind_memory, 72 }; 73 74 75 int 76 agp_intel_match(struct device *parent, struct cfdata *match, void *aux) 77 { 78 struct pci_attach_args *pa = aux; 79 80 if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, NULL, NULL) 81 == 0) 82 return 0; 83 84 return 1; 85 } 86 87 int 88 agp_intel_attach(struct device *parent, struct device *self, void *aux) 89 { 90 struct agp_softc *sc = (struct agp_softc *)self; 91 struct pci_attach_args *pa= aux; 92 struct agp_intel_softc *isc; 93 struct agp_gatt *gatt; 94 pcireg_t reg; 95 96 isc = malloc(sizeof *isc, M_AGP, M_NOWAIT); 97 if (isc == NULL) { 98 printf(": can't allocate chipset-specific softc\n"); 99 return ENOMEM; 100 } 101 memset(isc, 0, sizeof *isc); 102 sc->as_methods = &agp_intel_methods; 103 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 104 NULL); 105 106 if (agp_map_aperture(pa, sc) != 0) { 107 printf(": can't map aperture\n"); 108 free(isc, M_AGP); 109 return ENXIO; 110 } 111 112 isc->initial_aperture = AGP_GET_APERTURE(sc); 113 114 for (;;) { 115 gatt = agp_alloc_gatt(sc); 116 if (gatt) 117 break; 118 119 /* 120 * Probably contigmalloc failure. Try reducing the 121 * aperture so that the gatt size reduces. 122 */ 123 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 124 agp_generic_detach(sc); 125 printf(": failed to set aperture\n"); 126 return ENOMEM; 127 } 128 } 129 isc->gatt = gatt; 130 131 /* Install the gatt. */ 132 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 133 gatt->ag_physical); 134 135 /* Enable things, clear errors etc. */ 136 /* XXXfvdl get rid of the magic constants */ 137 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 138 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 139 reg &= ~(1 << 10); 140 reg |= (1 << 9); 141 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 142 143 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_STS); 144 reg &= ~0x00ff0000; 145 reg |= (7 << 16); 146 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_STS, reg); 147 148 return 0; 149 } 150 151 #if 0 152 static int 153 agp_intel_detach(struct agp_softc *sc) 154 { 155 int error; 156 pcireg_t reg; 157 struct agp_intel_softc *isc = sc->as_chipc; 158 159 error = agp_generic_detach(sc); 160 if (error) 161 return error; 162 163 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 164 reg &= ~(1 << 9); 165 printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); 166 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 167 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 168 AGP_SET_APERTURE(sc, isc->initial_aperture); 169 agp_free_gatt(sc, isc->gatt); 170 171 return 0; 172 } 173 #endif 174 175 static u_int32_t 176 agp_intel_get_aperture(struct agp_softc *sc) 177 { 178 u_int32_t apsize; 179 180 apsize = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE) & 0x1f; 181 182 /* 183 * The size is determined by the number of low bits of 184 * register APBASE which are forced to zero. The low 22 bits 185 * are always forced to zero and each zero bit in the apsize 186 * field just read forces the corresponding bit in the 27:22 187 * to be zero. We calculate the aperture size accordingly. 188 */ 189 return (((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1; 190 } 191 192 static int 193 agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 194 { 195 u_int32_t apsize; 196 pcireg_t reg; 197 198 /* 199 * Reverse the magic from get_aperture. 200 */ 201 apsize = ((aperture - 1) >> 22) ^ 0x1f; 202 203 /* 204 * Double check for sanity. 205 */ 206 if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) 207 return EINVAL; 208 209 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 210 reg = (reg & 0xffffff00) | apsize; 211 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, reg); 212 213 return 0; 214 } 215 216 static int 217 agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 218 { 219 struct agp_intel_softc *isc = sc->as_chipc; 220 221 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 222 return EINVAL; 223 224 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 225 return 0; 226 } 227 228 static int 229 agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 230 { 231 struct agp_intel_softc *isc = sc->as_chipc; 232 233 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 234 return EINVAL; 235 236 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 237 return 0; 238 } 239 240 static void 241 agp_intel_flush_tlb(struct agp_softc *sc) 242 { 243 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2200); 244 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 245 } 246
Indexes created Thu Oct 02 01:09:59 GMT 2025