agp_intel.c revision 1.3
1 /* $NetBSD: agp_intel.c,v 1.3 2001/09/15 00:25:00 thorpej 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 int 75 agp_intel_attach(struct device *parent, struct device *self, void *aux) 76 { 77 struct agp_softc *sc = (struct agp_softc *)self; 78 struct pci_attach_args *pa= aux; 79 struct agp_intel_softc *isc; 80 struct agp_gatt *gatt; 81 pcireg_t reg; 82 83 isc = malloc(sizeof *isc, M_AGP, M_NOWAIT); 84 if (isc == NULL) { 85 printf(": can't allocate chipset-specific softc\n"); 86 return ENOMEM; 87 } 88 memset(isc, 0, sizeof *isc); 89 90 sc->as_methods = &agp_intel_methods; 91 sc->as_chipc = isc; 92 93 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 94 NULL); 95 96 if (agp_map_aperture(pa, sc) != 0) { 97 printf(": can't map aperture\n"); 98 free(isc, M_AGP); 99 sc->as_chipc = NULL; 100 return ENXIO; 101 } 102 103 isc->initial_aperture = AGP_GET_APERTURE(sc); 104 105 for (;;) { 106 gatt = agp_alloc_gatt(sc); 107 if (gatt) 108 break; 109 110 /* 111 * Probably contigmalloc failure. Try reducing the 112 * aperture so that the gatt size reduces. 113 */ 114 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 115 agp_generic_detach(sc); 116 printf(": failed to set aperture\n"); 117 return ENOMEM; 118 } 119 } 120 isc->gatt = gatt; 121 122 /* Install the gatt. */ 123 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 124 gatt->ag_physical); 125 126 /* Enable things, clear errors etc. */ 127 /* XXXfvdl get rid of the magic constants */ 128 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 129 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 130 reg &= ~(1 << 10); 131 reg |= (1 << 9); 132 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 133 134 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_STS); 135 reg &= ~0x00ff0000; 136 reg |= (7 << 16); 137 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_STS, reg); 138 139 return 0; 140 } 141 142 #if 0 143 static int 144 agp_intel_detach(struct agp_softc *sc) 145 { 146 int error; 147 pcireg_t reg; 148 struct agp_intel_softc *isc = sc->as_chipc; 149 150 error = agp_generic_detach(sc); 151 if (error) 152 return error; 153 154 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 155 reg &= ~(1 << 9); 156 printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); 157 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 158 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 159 AGP_SET_APERTURE(sc, isc->initial_aperture); 160 agp_free_gatt(sc, isc->gatt); 161 162 return 0; 163 } 164 #endif 165 166 static u_int32_t 167 agp_intel_get_aperture(struct agp_softc *sc) 168 { 169 u_int32_t apsize; 170 171 apsize = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE) & 0x1f; 172 173 /* 174 * The size is determined by the number of low bits of 175 * register APBASE which are forced to zero. The low 22 bits 176 * are always forced to zero and each zero bit in the apsize 177 * field just read forces the corresponding bit in the 27:22 178 * to be zero. We calculate the aperture size accordingly. 179 */ 180 return (((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1; 181 } 182 183 static int 184 agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 185 { 186 u_int32_t apsize; 187 pcireg_t reg; 188 189 /* 190 * Reverse the magic from get_aperture. 191 */ 192 apsize = ((aperture - 1) >> 22) ^ 0x1f; 193 194 /* 195 * Double check for sanity. 196 */ 197 if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) 198 return EINVAL; 199 200 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 201 reg = (reg & 0xffffff00) | apsize; 202 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, reg); 203 204 return 0; 205 } 206 207 static int 208 agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 209 { 210 struct agp_intel_softc *isc = sc->as_chipc; 211 212 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 213 return EINVAL; 214 215 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 216 return 0; 217 } 218 219 static int 220 agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 221 { 222 struct agp_intel_softc *isc = sc->as_chipc; 223 224 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 225 return EINVAL; 226 227 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 228 return 0; 229 } 230 231 static void 232 agp_intel_flush_tlb(struct agp_softc *sc) 233 { 234 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2200); 235 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 236 } 237
Indexes created Thu Oct 02 01:09:59 GMT 2025