agp_intel.c revision 1.2.2.3
1 /* $NetBSD: agp_intel.c,v 1.2.2.3 2002/01/10 19:56:25 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/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: agp_intel.c,v 1.2.2.3 2002/01/10 19:56:25 thorpej Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/lock.h> 39 #include <sys/proc.h> 40 #include <sys/agpio.h> 41 #include <sys/device.h> 42 #include <sys/agpio.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <dev/pci/pcivar.h> 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/agpvar.h> 49 #include <dev/pci/agpreg.h> 50 51 #include <machine/bus.h> 52 53 struct agp_intel_softc { 54 u_int32_t initial_aperture; /* aperture size at startup */ 55 struct agp_gatt *gatt; 56 }; 57 58 static u_int32_t agp_intel_get_aperture(struct agp_softc *); 59 static int agp_intel_set_aperture(struct agp_softc *, u_int32_t); 60 static int agp_intel_bind_page(struct agp_softc *, off_t, bus_addr_t); 61 static int agp_intel_unbind_page(struct agp_softc *, off_t); 62 static void agp_intel_flush_tlb(struct agp_softc *); 63 64 struct agp_methods agp_intel_methods = { 65 agp_intel_get_aperture, 66 agp_intel_set_aperture, 67 agp_intel_bind_page, 68 agp_intel_unbind_page, 69 agp_intel_flush_tlb, 70 agp_generic_enable, 71 agp_generic_alloc_memory, 72 agp_generic_free_memory, 73 agp_generic_bind_memory, 74 agp_generic_unbind_memory, 75 }; 76 77 int 78 agp_intel_attach(struct device *parent, struct device *self, void *aux) 79 { 80 struct agp_softc *sc = (struct agp_softc *)self; 81 struct pci_attach_args *pa= aux; 82 struct agp_intel_softc *isc; 83 struct agp_gatt *gatt; 84 pcireg_t reg; 85 86 isc = malloc(sizeof *isc, M_AGP, M_NOWAIT); 87 if (isc == NULL) { 88 printf(": can't allocate chipset-specific softc\n"); 89 return ENOMEM; 90 } 91 memset(isc, 0, sizeof *isc); 92 93 sc->as_methods = &agp_intel_methods; 94 sc->as_chipc = isc; 95 96 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 97 NULL); 98 99 if (agp_map_aperture(pa, sc) != 0) { 100 printf(": can't map aperture\n"); 101 free(isc, M_AGP); 102 sc->as_chipc = NULL; 103 return ENXIO; 104 } 105 106 isc->initial_aperture = AGP_GET_APERTURE(sc); 107 108 for (;;) { 109 gatt = agp_alloc_gatt(sc); 110 if (gatt) 111 break; 112 113 /* 114 * Probably contigmalloc failure. Try reducing the 115 * aperture so that the gatt size reduces. 116 */ 117 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 118 agp_generic_detach(sc); 119 printf(": failed to set aperture\n"); 120 return ENOMEM; 121 } 122 } 123 isc->gatt = gatt; 124 125 /* Install the gatt. */ 126 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 127 gatt->ag_physical); 128 129 /* Enable things, clear errors etc. */ 130 /* XXXfvdl get rid of the magic constants */ 131 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 132 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 133 reg &= ~(1 << 10); 134 reg |= (1 << 9); 135 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 136 137 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_STS); 138 reg &= ~0x00ff0000; 139 reg |= (7 << 16); 140 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_STS, reg); 141 142 return 0; 143 } 144 145 #if 0 146 static int 147 agp_intel_detach(struct agp_softc *sc) 148 { 149 int error; 150 pcireg_t reg; 151 struct agp_intel_softc *isc = sc->as_chipc; 152 153 error = agp_generic_detach(sc); 154 if (error) 155 return error; 156 157 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 158 reg &= ~(1 << 9); 159 printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); 160 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 161 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 162 AGP_SET_APERTURE(sc, isc->initial_aperture); 163 agp_free_gatt(sc, isc->gatt); 164 165 return 0; 166 } 167 #endif 168 169 static u_int32_t 170 agp_intel_get_aperture(struct agp_softc *sc) 171 { 172 u_int32_t apsize; 173 174 apsize = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE) & 0x1f; 175 176 /* 177 * The size is determined by the number of low bits of 178 * register APBASE which are forced to zero. The low 22 bits 179 * are always forced to zero and each zero bit in the apsize 180 * field just read forces the corresponding bit in the 27:22 181 * to be zero. We calculate the aperture size accordingly. 182 */ 183 return (((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1; 184 } 185 186 static int 187 agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 188 { 189 u_int32_t apsize; 190 pcireg_t reg; 191 192 /* 193 * Reverse the magic from get_aperture. 194 */ 195 apsize = ((aperture - 1) >> 22) ^ 0x1f; 196 197 /* 198 * Double check for sanity. 199 */ 200 if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) 201 return EINVAL; 202 203 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 204 reg = (reg & 0xffffff00) | apsize; 205 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, reg); 206 207 return 0; 208 } 209 210 static int 211 agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 212 { 213 struct agp_intel_softc *isc = sc->as_chipc; 214 215 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 216 return EINVAL; 217 218 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 219 return 0; 220 } 221 222 static int 223 agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 224 { 225 struct agp_intel_softc *isc = sc->as_chipc; 226 227 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 228 return EINVAL; 229 230 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 231 return 0; 232 } 233 234 static void 235 agp_intel_flush_tlb(struct agp_softc *sc) 236 { 237 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2200); 238 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 239 } 240
Indexes created Thu Oct 02 01:09:59 GMT 2025