agp_intel.c revision 1.3.2.2
1 1.3.2.2 nathanw /* $NetBSD: agp_intel.c,v 1.3.2.2 2001/09/21 22:35:53 nathanw Exp $ */ 2 1.3.2.2 nathanw 3 1.3.2.2 nathanw /*- 4 1.3.2.2 nathanw * Copyright (c) 2000 Doug Rabson 5 1.3.2.2 nathanw * All rights reserved. 6 1.3.2.2 nathanw * 7 1.3.2.2 nathanw * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 nathanw * modification, are permitted provided that the following conditions 9 1.3.2.2 nathanw * are met: 10 1.3.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 nathanw * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 nathanw * documentation and/or other materials provided with the distribution. 15 1.3.2.2 nathanw * 16 1.3.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.3.2.2 nathanw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.3.2.2 nathanw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.3.2.2 nathanw * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.3.2.2 nathanw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.3.2.2 nathanw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.3.2.2 nathanw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.3.2.2 nathanw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.3.2.2 nathanw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.3.2.2 nathanw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.3.2.2 nathanw * SUCH DAMAGE. 27 1.3.2.2 nathanw * 28 1.3.2.2 nathanw * $FreeBSD: src/sys/pci/agp_intel.c,v 1.4 2001/07/05 21:28:47 jhb Exp $ 29 1.3.2.2 nathanw */ 30 1.3.2.2 nathanw 31 1.3.2.2 nathanw #include <sys/param.h> 32 1.3.2.2 nathanw #include <sys/systm.h> 33 1.3.2.2 nathanw #include <sys/malloc.h> 34 1.3.2.2 nathanw #include <sys/kernel.h> 35 1.3.2.2 nathanw #include <sys/lock.h> 36 1.3.2.2 nathanw #include <sys/proc.h> 37 1.3.2.2 nathanw #include <sys/agpio.h> 38 1.3.2.2 nathanw #include <sys/device.h> 39 1.3.2.2 nathanw #include <sys/agpio.h> 40 1.3.2.2 nathanw 41 1.3.2.2 nathanw #include <uvm/uvm_extern.h> 42 1.3.2.2 nathanw 43 1.3.2.2 nathanw #include <dev/pci/pcivar.h> 44 1.3.2.2 nathanw #include <dev/pci/pcireg.h> 45 1.3.2.2 nathanw #include <dev/pci/agpvar.h> 46 1.3.2.2 nathanw #include <dev/pci/agpreg.h> 47 1.3.2.2 nathanw 48 1.3.2.2 nathanw #include <machine/bus.h> 49 1.3.2.2 nathanw 50 1.3.2.2 nathanw struct agp_intel_softc { 51 1.3.2.2 nathanw u_int32_t initial_aperture; /* aperture size at startup */ 52 1.3.2.2 nathanw struct agp_gatt *gatt; 53 1.3.2.2 nathanw }; 54 1.3.2.2 nathanw 55 1.3.2.2 nathanw static u_int32_t agp_intel_get_aperture(struct agp_softc *); 56 1.3.2.2 nathanw static int agp_intel_set_aperture(struct agp_softc *, u_int32_t); 57 1.3.2.2 nathanw static int agp_intel_bind_page(struct agp_softc *, off_t, bus_addr_t); 58 1.3.2.2 nathanw static int agp_intel_unbind_page(struct agp_softc *, off_t); 59 1.3.2.2 nathanw static void agp_intel_flush_tlb(struct agp_softc *); 60 1.3.2.2 nathanw 61 1.3.2.2 nathanw struct agp_methods agp_intel_methods = { 62 1.3.2.2 nathanw agp_intel_get_aperture, 63 1.3.2.2 nathanw agp_intel_set_aperture, 64 1.3.2.2 nathanw agp_intel_bind_page, 65 1.3.2.2 nathanw agp_intel_unbind_page, 66 1.3.2.2 nathanw agp_intel_flush_tlb, 67 1.3.2.2 nathanw agp_generic_enable, 68 1.3.2.2 nathanw agp_generic_alloc_memory, 69 1.3.2.2 nathanw agp_generic_free_memory, 70 1.3.2.2 nathanw agp_generic_bind_memory, 71 1.3.2.2 nathanw agp_generic_unbind_memory, 72 1.3.2.2 nathanw }; 73 1.3.2.2 nathanw 74 1.3.2.2 nathanw int 75 1.3.2.2 nathanw agp_intel_attach(struct device *parent, struct device *self, void *aux) 76 1.3.2.2 nathanw { 77 1.3.2.2 nathanw struct agp_softc *sc = (struct agp_softc *)self; 78 1.3.2.2 nathanw struct pci_attach_args *pa= aux; 79 1.3.2.2 nathanw struct agp_intel_softc *isc; 80 1.3.2.2 nathanw struct agp_gatt *gatt; 81 1.3.2.2 nathanw pcireg_t reg; 82 1.3.2.2 nathanw 83 1.3.2.2 nathanw isc = malloc(sizeof *isc, M_AGP, M_NOWAIT); 84 1.3.2.2 nathanw if (isc == NULL) { 85 1.3.2.2 nathanw printf(": can't allocate chipset-specific softc\n"); 86 1.3.2.2 nathanw return ENOMEM; 87 1.3.2.2 nathanw } 88 1.3.2.2 nathanw memset(isc, 0, sizeof *isc); 89 1.3.2.2 nathanw 90 1.3.2.2 nathanw sc->as_methods = &agp_intel_methods; 91 1.3.2.2 nathanw sc->as_chipc = isc; 92 1.3.2.2 nathanw 93 1.3.2.2 nathanw pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 94 1.3.2.2 nathanw NULL); 95 1.3.2.2 nathanw 96 1.3.2.2 nathanw if (agp_map_aperture(pa, sc) != 0) { 97 1.3.2.2 nathanw printf(": can't map aperture\n"); 98 1.3.2.2 nathanw free(isc, M_AGP); 99 1.3.2.2 nathanw sc->as_chipc = NULL; 100 1.3.2.2 nathanw return ENXIO; 101 1.3.2.2 nathanw } 102 1.3.2.2 nathanw 103 1.3.2.2 nathanw isc->initial_aperture = AGP_GET_APERTURE(sc); 104 1.3.2.2 nathanw 105 1.3.2.2 nathanw for (;;) { 106 1.3.2.2 nathanw gatt = agp_alloc_gatt(sc); 107 1.3.2.2 nathanw if (gatt) 108 1.3.2.2 nathanw break; 109 1.3.2.2 nathanw 110 1.3.2.2 nathanw /* 111 1.3.2.2 nathanw * Probably contigmalloc failure. Try reducing the 112 1.3.2.2 nathanw * aperture so that the gatt size reduces. 113 1.3.2.2 nathanw */ 114 1.3.2.2 nathanw if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 115 1.3.2.2 nathanw agp_generic_detach(sc); 116 1.3.2.2 nathanw printf(": failed to set aperture\n"); 117 1.3.2.2 nathanw return ENOMEM; 118 1.3.2.2 nathanw } 119 1.3.2.2 nathanw } 120 1.3.2.2 nathanw isc->gatt = gatt; 121 1.3.2.2 nathanw 122 1.3.2.2 nathanw /* Install the gatt. */ 123 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 124 1.3.2.2 nathanw gatt->ag_physical); 125 1.3.2.2 nathanw 126 1.3.2.2 nathanw /* Enable things, clear errors etc. */ 127 1.3.2.2 nathanw /* XXXfvdl get rid of the magic constants */ 128 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 129 1.3.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 130 1.3.2.2 nathanw reg &= ~(1 << 10); 131 1.3.2.2 nathanw reg |= (1 << 9); 132 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 133 1.3.2.2 nathanw 134 1.3.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_STS); 135 1.3.2.2 nathanw reg &= ~0x00ff0000; 136 1.3.2.2 nathanw reg |= (7 << 16); 137 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_STS, reg); 138 1.3.2.2 nathanw 139 1.3.2.2 nathanw return 0; 140 1.3.2.2 nathanw } 141 1.3.2.2 nathanw 142 1.3.2.2 nathanw #if 0 143 1.3.2.2 nathanw static int 144 1.3.2.2 nathanw agp_intel_detach(struct agp_softc *sc) 145 1.3.2.2 nathanw { 146 1.3.2.2 nathanw int error; 147 1.3.2.2 nathanw pcireg_t reg; 148 1.3.2.2 nathanw struct agp_intel_softc *isc = sc->as_chipc; 149 1.3.2.2 nathanw 150 1.3.2.2 nathanw error = agp_generic_detach(sc); 151 1.3.2.2 nathanw if (error) 152 1.3.2.2 nathanw return error; 153 1.3.2.2 nathanw 154 1.3.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 155 1.3.2.2 nathanw reg &= ~(1 << 9); 156 1.3.2.2 nathanw printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); 157 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 158 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 159 1.3.2.2 nathanw AGP_SET_APERTURE(sc, isc->initial_aperture); 160 1.3.2.2 nathanw agp_free_gatt(sc, isc->gatt); 161 1.3.2.2 nathanw 162 1.3.2.2 nathanw return 0; 163 1.3.2.2 nathanw } 164 1.3.2.2 nathanw #endif 165 1.3.2.2 nathanw 166 1.3.2.2 nathanw static u_int32_t 167 1.3.2.2 nathanw agp_intel_get_aperture(struct agp_softc *sc) 168 1.3.2.2 nathanw { 169 1.3.2.2 nathanw u_int32_t apsize; 170 1.3.2.2 nathanw 171 1.3.2.2 nathanw apsize = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE) & 0x1f; 172 1.3.2.2 nathanw 173 1.3.2.2 nathanw /* 174 1.3.2.2 nathanw * The size is determined by the number of low bits of 175 1.3.2.2 nathanw * register APBASE which are forced to zero. The low 22 bits 176 1.3.2.2 nathanw * are always forced to zero and each zero bit in the apsize 177 1.3.2.2 nathanw * field just read forces the corresponding bit in the 27:22 178 1.3.2.2 nathanw * to be zero. We calculate the aperture size accordingly. 179 1.3.2.2 nathanw */ 180 1.3.2.2 nathanw return (((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1; 181 1.3.2.2 nathanw } 182 1.3.2.2 nathanw 183 1.3.2.2 nathanw static int 184 1.3.2.2 nathanw agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 185 1.3.2.2 nathanw { 186 1.3.2.2 nathanw u_int32_t apsize; 187 1.3.2.2 nathanw pcireg_t reg; 188 1.3.2.2 nathanw 189 1.3.2.2 nathanw /* 190 1.3.2.2 nathanw * Reverse the magic from get_aperture. 191 1.3.2.2 nathanw */ 192 1.3.2.2 nathanw apsize = ((aperture - 1) >> 22) ^ 0x1f; 193 1.3.2.2 nathanw 194 1.3.2.2 nathanw /* 195 1.3.2.2 nathanw * Double check for sanity. 196 1.3.2.2 nathanw */ 197 1.3.2.2 nathanw if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) 198 1.3.2.2 nathanw return EINVAL; 199 1.3.2.2 nathanw 200 1.3.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 201 1.3.2.2 nathanw reg = (reg & 0xffffff00) | apsize; 202 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, reg); 203 1.3.2.2 nathanw 204 1.3.2.2 nathanw return 0; 205 1.3.2.2 nathanw } 206 1.3.2.2 nathanw 207 1.3.2.2 nathanw static int 208 1.3.2.2 nathanw agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 209 1.3.2.2 nathanw { 210 1.3.2.2 nathanw struct agp_intel_softc *isc = sc->as_chipc; 211 1.3.2.2 nathanw 212 1.3.2.2 nathanw if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 213 1.3.2.2 nathanw return EINVAL; 214 1.3.2.2 nathanw 215 1.3.2.2 nathanw isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 216 1.3.2.2 nathanw return 0; 217 1.3.2.2 nathanw } 218 1.3.2.2 nathanw 219 1.3.2.2 nathanw static int 220 1.3.2.2 nathanw agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 221 1.3.2.2 nathanw { 222 1.3.2.2 nathanw struct agp_intel_softc *isc = sc->as_chipc; 223 1.3.2.2 nathanw 224 1.3.2.2 nathanw if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 225 1.3.2.2 nathanw return EINVAL; 226 1.3.2.2 nathanw 227 1.3.2.2 nathanw isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 228 1.3.2.2 nathanw return 0; 229 1.3.2.2 nathanw } 230 1.3.2.2 nathanw 231 1.3.2.2 nathanw static void 232 1.3.2.2 nathanw agp_intel_flush_tlb(struct agp_softc *sc) 233 1.3.2.2 nathanw { 234 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2200); 235 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 0x2280); 236 1.3.2.2 nathanw } 237
Indexes created Thu Oct 02 07:10:07 GMT 2025