agp_intel.c revision 1.2
1 /* $NetBSD: agp_intel.c,v 1.2 2001/09/11 06:30:38 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); 102 103 sc->as_methods = &agp_intel_methods; 104 sc->as_chipc = isc; 105 106 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 107 NULL); 108 109 if (agp_map_aperture(pa, sc) != 0) { 110 printf(": can't map aperture\n"); 111 free(isc, M_AGP); 112 sc->as_chipc = NULL; 113 return ENXIO; 114 } 115 116 isc->initial_aperture = AGP_GET_APERTURE(sc); 117 118 for (;;) { 119 gatt = agp_alloc_gatt(sc); 120 if (gatt) 121 break; 122 123 /* 124 * Probably contigmalloc failure. Try reducing the 125 * aperture so that the gatt size reduces. 126 */ 127 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 128 agp_generic_detach(sc); 129 printf(": failed to set aperture\n"); 130 return ENOMEM; 131 } 132 } 133 isc->gatt = gatt; 134 135 /* Install the gatt. */ 136 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 137 gatt->ag_physical); 138 139 /* Enable things, clear errors etc. */ 140 /* XXXfvdl get rid of the magic constants */ 141 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 142 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 143 reg &= ~(1 << 10); 144 reg |= (1 << 9); 145 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 146 147 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_STS); 148 reg &= ~0x00ff0000; 149 reg |= (7 << 16); 150 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_STS, reg); 151 152 return 0; 153 } 154 155 #if 0 156 static int 157 agp_intel_detach(struct agp_softc *sc) 158 { 159 int error; 160 pcireg_t reg; 161 struct agp_intel_softc *isc = sc->as_chipc; 162 163 error = agp_generic_detach(sc); 164 if (error) 165 return error; 166 167 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 168 reg &= ~(1 << 9); 169 printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); 170 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 171 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 172 AGP_SET_APERTURE(sc, isc->initial_aperture); 173 agp_free_gatt(sc, isc->gatt); 174 175 return 0; 176 } 177 #endif 178 179 static u_int32_t 180 agp_intel_get_aperture(struct agp_softc *sc) 181 { 182 u_int32_t apsize; 183 184 apsize = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE) & 0x1f; 185 186 /* 187 * The size is determined by the number of low bits of 188 * register APBASE which are forced to zero. The low 22 bits 189 * are always forced to zero and each zero bit in the apsize 190 * field just read forces the corresponding bit in the 27:22 191 * to be zero. We calculate the aperture size accordingly. 192 */ 193 return (((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1; 194 } 195 196 static int 197 agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 198 { 199 u_int32_t apsize; 200 pcireg_t reg; 201 202 /* 203 * Reverse the magic from get_aperture. 204 */ 205 apsize = ((aperture - 1) >> 22) ^ 0x1f; 206 207 /* 208 * Double check for sanity. 209 */ 210 if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) 211 return EINVAL; 212 213 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 214 reg = (reg & 0xffffff00) | apsize; 215 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, reg); 216 217 return 0; 218 } 219 220 static int 221 agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 222 { 223 struct agp_intel_softc *isc = sc->as_chipc; 224 225 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 226 return EINVAL; 227 228 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 229 return 0; 230 } 231 232 static int 233 agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 234 { 235 struct agp_intel_softc *isc = sc->as_chipc; 236 237 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 238 return EINVAL; 239 240 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 241 return 0; 242 } 243 244 static void 245 agp_intel_flush_tlb(struct agp_softc *sc) 246 { 247 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2200); 248 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 249 } 250
Indexes created Wed Sep 24 05:09:52 GMT 2025