agp_sis.c revision 1.1
1 /* $NetBSD: agp_sis.c,v 1.1 2001/09/10 10:01:02 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_sis.c,v 1.3 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/conf.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_sis_softc { 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53 }; 54 55 static u_int32_t agp_sis_get_aperture(struct agp_softc *); 56 static int agp_sis_set_aperture(struct agp_softc *, u_int32_t); 57 static int agp_sis_bind_page(struct agp_softc *, off_t, bus_addr_t); 58 static int agp_sis_unbind_page(struct agp_softc *, off_t); 59 static void agp_sis_flush_tlb(struct agp_softc *); 60 61 struct agp_methods agp_sis_methods = { 62 agp_sis_get_aperture, 63 agp_sis_set_aperture, 64 agp_sis_bind_page, 65 agp_sis_unbind_page, 66 agp_sis_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_sis_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_sis_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_sis_softc *ssc; 93 struct agp_gatt *gatt; 94 pcireg_t reg; 95 96 ssc = malloc(sizeof *ssc, M_AGP, M_NOWAIT); 97 if (ssc == NULL) { 98 printf(": can't allocate chipset-specific softc\n"); 99 return ENOMEM; 100 } 101 sc->as_methods = &agp_sis_methods; 102 sc->as_chipc = ssc; 103 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 104 NULL); 105 106 if (agp_map_aperture(pa, sc) != 0) { 107 printf(": can't map aperture\n"); 108 free(ssc, M_AGP); 109 return ENXIO; 110 } 111 112 ssc->initial_aperture = AGP_GET_APERTURE(sc); 113 114 for (;;) { 115 gatt = agp_alloc_gatt(sc); 116 if (gatt) 117 break; 118 119 /* 120 * Probably contigmalloc failure. Try reducing the 121 * aperture so that the gatt size reduces. 122 */ 123 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 124 agp_generic_detach(sc); 125 printf(": failed to set aperture\n"); 126 return ENOMEM; 127 } 128 } 129 ssc->gatt = gatt; 130 131 /* Install the gatt. */ 132 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_ATTBASE, 133 gatt->ag_physical); 134 135 /* Enable the aperture and auto-tlb-inval */ 136 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 137 reg |= (0x05 << 24) | 3; 138 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 139 140 return 0; 141 } 142 143 #if 0 144 static int 145 agp_sis_detach(struct agp_softc *sc) 146 { 147 struct agp_sis_softc *ssc = sc->as_chipc; 148 pcireg_t reg; 149 int error; 150 151 error = agp_generic_detach(sc); 152 if (error) 153 return error; 154 155 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 156 reg &= ~3; 157 reg &= 0x00ffffff; 158 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 159 160 /* Put the aperture back the way it started. */ 161 AGP_SET_APERTURE(sc, ssc->initial_aperture); 162 163 agp_free_gatt(sc, ssc->gatt); 164 return 0; 165 } 166 #endif 167 168 static u_int32_t 169 agp_sis_get_aperture(struct agp_softc *sc) 170 { 171 int gws; 172 173 /* 174 * The aperture size is equal to 4M<<gws. 175 */ 176 gws = (pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL)&0x70) >> 4; 177 return (4*1024*1024) << gws; 178 } 179 180 static int 181 agp_sis_set_aperture(struct agp_softc *sc, u_int32_t aperture) 182 { 183 int gws; 184 pcireg_t reg; 185 186 /* 187 * Check for a power of two and make sure its within the 188 * programmable range. 189 */ 190 if (aperture & (aperture - 1) 191 || aperture < 4*1024*1024 192 || aperture > 256*1024*1024) 193 return EINVAL; 194 195 gws = ffs(aperture / 4*1024*1024) - 1; 196 197 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 198 reg &= ~0x00000070; 199 reg |= gws << 4; 200 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 201 202 return 0; 203 } 204 205 static int 206 agp_sis_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 207 { 208 struct agp_sis_softc *ssc = sc->as_chipc; 209 210 if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 211 return EINVAL; 212 213 ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 214 return 0; 215 } 216 217 static int 218 agp_sis_unbind_page(struct agp_softc *sc, off_t offset) 219 { 220 struct agp_sis_softc *ssc = sc->as_chipc; 221 222 if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 223 return EINVAL; 224 225 ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 226 return 0; 227 } 228 229 static void 230 agp_sis_flush_tlb(struct agp_softc *sc) 231 { 232 pcireg_t reg; 233 234 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH); 235 reg &= 0xffffff00; 236 reg |= 0x02; 237 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH, reg); 238 } 239
Indexes created Wed Sep 24 22:09:59 GMT 2025