1 /* $NetBSD: agp_sis.c,v 1.15 2019/11/10 21:16:36 chs 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/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: agp_sis.c,v 1.15 2019/11/10 21:16:36 chs 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/proc.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/agpio.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 <sys/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 static 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 int 75 agp_sis_attach(device_t parent, device_t self, void *aux) 76 { 77 struct agp_softc *sc = device_private(self); 78 struct pci_attach_args *pa = aux; 79 struct agp_sis_softc *ssc; 80 struct agp_gatt *gatt; 81 pcireg_t reg; 82 83 ssc = malloc(sizeof *ssc, M_AGP, M_WAITOK); 84 sc->as_methods = &agp_sis_methods; 85 sc->as_chipc = ssc; 86 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 87 NULL); 88 89 if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { 90 aprint_error(": can't map aperture\n"); 91 free(ssc, M_AGP); 92 return ENXIO; 93 } 94 95 ssc->initial_aperture = AGP_GET_APERTURE(sc); 96 97 for (;;) { 98 gatt = agp_alloc_gatt(sc); 99 if (gatt) 100 break; 101 102 /* 103 * Probably contigmalloc failure. Try reducing the 104 * aperture so that the gatt size reduces. 105 */ 106 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 107 agp_generic_detach(sc); 108 aprint_error(": failed to set aperture\n"); 109 return ENOMEM; 110 } 111 } 112 ssc->gatt = gatt; 113 114 /* Install the gatt. */ 115 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_ATTBASE, 116 gatt->ag_physical); 117 118 /* Enable the aperture and auto-tlb-inval */ 119 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 120 reg |= (0x05 << 24) | 3; 121 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 122 123 return 0; 124 } 125 126 #if 0 127 static int 128 agp_sis_detach(struct agp_softc *sc) 129 { 130 struct agp_sis_softc *ssc = sc->as_chipc; 131 pcireg_t reg; 132 int error; 133 134 error = agp_generic_detach(sc); 135 if (error) 136 return error; 137 138 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 139 reg &= ~3; 140 reg &= 0x00ffffff; 141 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 142 143 /* Put the aperture back the way it started. */ 144 AGP_SET_APERTURE(sc, ssc->initial_aperture); 145 146 agp_free_gatt(sc, ssc->gatt); 147 return 0; 148 } 149 #endif 150 151 static u_int32_t 152 agp_sis_get_aperture(struct agp_softc *sc) 153 { 154 int gws; 155 156 /* 157 * The aperture size is equal to 4M<<gws. 158 */ 159 gws = (pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL)&0x70) >> 4; 160 return (4*1024*1024) << gws; 161 } 162 163 static int 164 agp_sis_set_aperture(struct agp_softc *sc, u_int32_t aperture) 165 { 166 int gws; 167 pcireg_t reg; 168 169 /* 170 * Check for a power of two and make sure its within the 171 * programmable range. 172 */ 173 if (aperture & (aperture - 1) 174 || aperture < 4*1024*1024 175 || aperture > 256*1024*1024) 176 return EINVAL; 177 178 gws = ffs(aperture / 4*1024*1024) - 1; 179 180 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 181 reg &= ~0x00000070; 182 reg |= gws << 4; 183 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 184 185 return 0; 186 } 187 188 static int 189 agp_sis_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 190 { 191 struct agp_sis_softc *ssc = sc->as_chipc; 192 193 if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 194 return EINVAL; 195 196 ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 197 return 0; 198 } 199 200 static int 201 agp_sis_unbind_page(struct agp_softc *sc, off_t offset) 202 { 203 struct agp_sis_softc *ssc = sc->as_chipc; 204 205 if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 206 return EINVAL; 207 208 ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 209 return 0; 210 } 211 212 static void 213 agp_sis_flush_tlb(struct agp_softc *sc) 214 { 215 pcireg_t reg; 216 217 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH); 218 reg &= 0xffffff00; 219 reg |= 0x02; 220 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH, reg); 221 } 222
Indexes created Sat Sep 20 22:09:52 GMT 2025