agp_sis.c revision 1.14
1 /* $NetBSD: agp_sis.c,v 1.14 2010/11/13 13:52:05 uebayasi 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 1.14 2010/11/13 13:52:05 uebayasi 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_NOWAIT); 84 if (ssc == NULL) { 85 aprint_error(": can't allocate chipset-specific softc\n"); 86 return ENOMEM; 87 } 88 sc->as_methods = &agp_sis_methods; 89 sc->as_chipc = ssc; 90 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 91 NULL); 92 93 if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { 94 aprint_error(": can't map aperture\n"); 95 free(ssc, M_AGP); 96 return ENXIO; 97 } 98 99 ssc->initial_aperture = AGP_GET_APERTURE(sc); 100 101 for (;;) { 102 gatt = agp_alloc_gatt(sc); 103 if (gatt) 104 break; 105 106 /* 107 * Probably contigmalloc failure. Try reducing the 108 * aperture so that the gatt size reduces. 109 */ 110 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 111 agp_generic_detach(sc); 112 aprint_error(": failed to set aperture\n"); 113 return ENOMEM; 114 } 115 } 116 ssc->gatt = gatt; 117 118 /* Install the gatt. */ 119 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_ATTBASE, 120 gatt->ag_physical); 121 122 /* Enable the aperture and auto-tlb-inval */ 123 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 124 reg |= (0x05 << 24) | 3; 125 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 126 127 return 0; 128 } 129 130 #if 0 131 static int 132 agp_sis_detach(struct agp_softc *sc) 133 { 134 struct agp_sis_softc *ssc = sc->as_chipc; 135 pcireg_t reg; 136 int error; 137 138 error = agp_generic_detach(sc); 139 if (error) 140 return error; 141 142 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 143 reg &= ~3; 144 reg &= 0x00ffffff; 145 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 146 147 /* Put the aperture back the way it started. */ 148 AGP_SET_APERTURE(sc, ssc->initial_aperture); 149 150 agp_free_gatt(sc, ssc->gatt); 151 return 0; 152 } 153 #endif 154 155 static u_int32_t 156 agp_sis_get_aperture(struct agp_softc *sc) 157 { 158 int gws; 159 160 /* 161 * The aperture size is equal to 4M<<gws. 162 */ 163 gws = (pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL)&0x70) >> 4; 164 return (4*1024*1024) << gws; 165 } 166 167 static int 168 agp_sis_set_aperture(struct agp_softc *sc, u_int32_t aperture) 169 { 170 int gws; 171 pcireg_t reg; 172 173 /* 174 * Check for a power of two and make sure its within the 175 * programmable range. 176 */ 177 if (aperture & (aperture - 1) 178 || aperture < 4*1024*1024 179 || aperture > 256*1024*1024) 180 return EINVAL; 181 182 gws = ffs(aperture / 4*1024*1024) - 1; 183 184 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 185 reg &= ~0x00000070; 186 reg |= gws << 4; 187 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 188 189 return 0; 190 } 191 192 static int 193 agp_sis_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 194 { 195 struct agp_sis_softc *ssc = sc->as_chipc; 196 197 if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 198 return EINVAL; 199 200 ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 201 return 0; 202 } 203 204 static int 205 agp_sis_unbind_page(struct agp_softc *sc, off_t offset) 206 { 207 struct agp_sis_softc *ssc = sc->as_chipc; 208 209 if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 210 return EINVAL; 211 212 ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 213 return 0; 214 } 215 216 static void 217 agp_sis_flush_tlb(struct agp_softc *sc) 218 { 219 pcireg_t reg; 220 221 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH); 222 reg &= 0xffffff00; 223 reg |= 0x02; 224 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH, reg); 225 } 226
Indexes created Tue Oct 14 15:09:51 GMT 2025