agp_intel.c revision 1.5
1 /* $NetBSD: agp_intel.c,v 1.5 2002/01/12 16:17:05 tsutsui 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 1.5 2002/01/12 16:17:05 tsutsui 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|M_ZERO); 87 if (isc == NULL) { 88 printf(": can't allocate chipset-specific softc\n"); 89 return ENOMEM; 90 } 91 92 sc->as_methods = &agp_intel_methods; 93 sc->as_chipc = isc; 94 95 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 96 NULL); 97 98 if (agp_map_aperture(pa, sc) != 0) { 99 printf(": can't map aperture\n"); 100 free(isc, M_AGP); 101 sc->as_chipc = NULL; 102 return ENXIO; 103 } 104 105 isc->initial_aperture = AGP_GET_APERTURE(sc); 106 107 for (;;) { 108 gatt = agp_alloc_gatt(sc); 109 if (gatt) 110 break; 111 112 /* 113 * Probably contigmalloc failure. Try reducing the 114 * aperture so that the gatt size reduces. 115 */ 116 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 117 agp_generic_detach(sc); 118 printf(": failed to set aperture\n"); 119 return ENOMEM; 120 } 121 } 122 isc->gatt = gatt; 123 124 /* Install the gatt. */ 125 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 126 gatt->ag_physical); 127 128 /* Enable things, clear errors etc. */ 129 /* XXXfvdl get rid of the magic constants */ 130 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 131 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 132 reg &= ~(1 << 10); 133 reg |= (1 << 9); 134 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 135 136 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_STS); 137 reg &= ~0x00ff0000; 138 reg |= (7 << 16); 139 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_STS, reg); 140 141 return 0; 142 } 143 144 #if 0 145 static int 146 agp_intel_detach(struct agp_softc *sc) 147 { 148 int error; 149 pcireg_t reg; 150 struct agp_intel_softc *isc = sc->as_chipc; 151 152 error = agp_generic_detach(sc); 153 if (error) 154 return error; 155 156 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 157 reg &= ~(1 << 9); 158 printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); 159 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 160 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 161 AGP_SET_APERTURE(sc, isc->initial_aperture); 162 agp_free_gatt(sc, isc->gatt); 163 164 return 0; 165 } 166 #endif 167 168 static u_int32_t 169 agp_intel_get_aperture(struct agp_softc *sc) 170 { 171 u_int32_t apsize; 172 173 apsize = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE) & 0x1f; 174 175 /* 176 * The size is determined by the number of low bits of 177 * register APBASE which are forced to zero. The low 22 bits 178 * are always forced to zero and each zero bit in the apsize 179 * field just read forces the corresponding bit in the 27:22 180 * to be zero. We calculate the aperture size accordingly. 181 */ 182 return (((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1; 183 } 184 185 static int 186 agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 187 { 188 u_int32_t apsize; 189 pcireg_t reg; 190 191 /* 192 * Reverse the magic from get_aperture. 193 */ 194 apsize = ((aperture - 1) >> 22) ^ 0x1f; 195 196 /* 197 * Double check for sanity. 198 */ 199 if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) 200 return EINVAL; 201 202 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 203 reg = (reg & 0xffffff00) | apsize; 204 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, reg); 205 206 return 0; 207 } 208 209 static int 210 agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 211 { 212 struct agp_intel_softc *isc = sc->as_chipc; 213 214 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 215 return EINVAL; 216 217 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 218 return 0; 219 } 220 221 static int 222 agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 223 { 224 struct agp_intel_softc *isc = sc->as_chipc; 225 226 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 227 return EINVAL; 228 229 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 230 return 0; 231 } 232 233 static void 234 agp_intel_flush_tlb(struct agp_softc *sc) 235 { 236 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2200); 237 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 238 } 239
Indexes created Wed Sep 24 02:09:48 GMT 2025