1 /* $OpenBSD: agp_ali.c,v 1.5 2007/11/26 15:35:15 deraadt Exp $ */ 2 /* $NetBSD: agp_ali.c,v 1.2 2001/09/15 00:25:00 thorpej Exp $ */ 3 4 5 /*- 6 * Copyright (c) 2000 Doug Rabson 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD: src/sys/pci/agp_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $ 31 */ 32 33 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/conf.h> 41 #include <sys/device.h> 42 #include <sys/lock.h> 43 #include <sys/agpio.h> 44 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/pcireg.h> 47 #include <dev/pci/vga_pcivar.h> 48 #include <dev/pci/agpvar.h> 49 #include <dev/pci/agpreg.h> 50 51 #include <machine/bus.h> 52 53 struct agp_ali_softc { 54 u_int32_t initial_aperture; /* aperture size at startup */ 55 struct agp_gatt *gatt; 56 }; 57 58 u_int32_t agp_ali_get_aperture(struct agp_softc *); 59 int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t); 60 int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t); 61 int agp_ali_unbind_page(struct agp_softc *, off_t); 62 void agp_ali_flush_tlb(struct agp_softc *); 63 64 struct agp_methods agp_ali_methods = { 65 agp_ali_get_aperture, 66 agp_ali_set_aperture, 67 agp_ali_bind_page, 68 agp_ali_unbind_page, 69 agp_ali_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_ali_attach(struct agp_softc *sc, struct pci_attach_args *pa) 79 { 80 struct agp_ali_softc *asc; 81 struct agp_gatt *gatt; 82 pcireg_t reg; 83 84 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); 85 if (asc == NULL) { 86 printf("failed to allocate softc\n"); 87 return (ENOMEM); 88 } 89 sc->sc_chipc = asc; 90 sc->sc_methods = &agp_ali_methods; 91 92 if (agp_map_aperture(pa, sc, AGP_APBASE, PCI_MAPREG_TYPE_MEM) != 0) { 93 printf("failed to map aperture\n"); 94 free(asc, M_AGP); 95 return (ENXIO); 96 } 97 98 asc->initial_aperture = agp_ali_get_aperture(sc); 99 100 for (;;) { 101 gatt = agp_alloc_gatt(sc); 102 if (gatt != NULL) 103 break; 104 105 /* 106 * Probably contigmalloc failure. Try reducing the 107 * aperture so that the gatt size reduces. 108 */ 109 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 110 agp_generic_detach(sc); 111 printf("failed to set aperture\n"); 112 return (ENOMEM); 113 } 114 } 115 asc->gatt = gatt; 116 117 /* Install the gatt. */ 118 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE); 119 reg = (reg & 0xff) | gatt->ag_physical; 120 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg); 121 122 /* Enable the TLB. */ 123 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL); 124 reg = (reg & ~0xff) | 0x10; 125 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); 126 127 return (0); 128 } 129 130 #if 0 131 int 132 agp_ali_detach(struct agp_softc *sc) 133 { 134 int error; 135 pcireg_t reg; 136 struct agp_ali_softc *asc = sc->sc_chipc; 137 138 error = agp_generic_detach(sc); 139 if (error) 140 return (error); 141 142 /* Disable the TLB.. */ 143 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL); 144 reg &= ~0xff; 145 reg |= 0x90; 146 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); 147 148 /* Put the aperture back the way it started. */ 149 AGP_SET_APERTURE(sc, asc->initial_aperture); 150 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE); 151 reg &= 0xff; 152 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg); 153 154 agp_free_gatt(sc, asc->gatt); 155 return (0); 156 } 157 #endif 158 159 #define M 1024*1024 160 161 static const u_int32_t agp_ali_table[] = { 162 0, /* 0 - invalid */ 163 1, /* 1 - invalid */ 164 2, /* 2 - invalid */ 165 4*M, /* 3 - invalid */ 166 8*M, /* 4 - invalid */ 167 0, /* 5 - invalid */ 168 16*M, /* 6 - invalid */ 169 32*M, /* 7 - invalid */ 170 64*M, /* 8 - invalid */ 171 128*M, /* 9 - invalid */ 172 256*M, /* 10 - invalid */ 173 }; 174 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 175 176 u_int32_t 177 agp_ali_get_aperture(struct agp_softc *sc) 178 { 179 int i; 180 181 /* 182 * The aperture size is derived from the low bits of attbase. 183 * I'm not sure this is correct.. 184 */ 185 i = (int)pci_conf_read(sc->sc_pc, sc->sc_pcitag, 186 AGP_ALI_ATTBASE) & 0xff; 187 if (i >= agp_ali_table_size) 188 return (0); 189 return (agp_ali_table[i]); 190 } 191 192 int 193 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) 194 { 195 int i; 196 pcireg_t reg; 197 198 for (i = 0; i < agp_ali_table_size; i++) 199 if (agp_ali_table[i] == aperture) 200 break; 201 if (i == agp_ali_table_size) 202 return (EINVAL); 203 204 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE); 205 reg &= ~0xff; 206 reg |= i; 207 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg); 208 return (0); 209 } 210 211 int 212 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 213 { 214 struct agp_ali_softc *asc = sc->sc_chipc; 215 216 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 217 return (EINVAL); 218 219 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 220 return (0); 221 } 222 223 int 224 agp_ali_unbind_page(struct agp_softc *sc, off_t offset) 225 { 226 struct agp_ali_softc *asc = sc->sc_chipc; 227 228 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 229 return (EINVAL); 230 231 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 232 return (0); 233 } 234 235 void 236 agp_ali_flush_tlb(struct agp_softc *sc) 237 { 238 pcireg_t reg; 239 240 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL); 241 reg &= ~0xff; 242 reg |= 0x90; 243 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); 244 reg &= ~0xff; 245 reg |= 0x10; 246 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); 247 } 248 249