agp_ali.c revision 1.1
1 /* $NetBSD: agp_ali.c,v 1.1 2001/09/10 10:01:01 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_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/kernel.h> 33 #include <sys/malloc.h> 34 #include <sys/systm.h> 35 #include <sys/proc.h> 36 #include <sys/conf.h> 37 #include <sys/device.h> 38 #include <sys/lock.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_ali_softc { 51 struct agp_softc agp; 52 u_int32_t initial_aperture; /* aperture size at startup */ 53 struct agp_gatt *gatt; 54 }; 55 56 static u_int32_t agp_ali_get_aperture(struct agp_softc *); 57 static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t); 58 static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t); 59 static int agp_ali_unbind_page(struct agp_softc *, off_t); 60 static void agp_ali_flush_tlb(struct agp_softc *); 61 62 63 struct agp_methods agp_ali_methods = { 64 agp_ali_get_aperture, 65 agp_ali_set_aperture, 66 agp_ali_bind_page, 67 agp_ali_unbind_page, 68 agp_ali_flush_tlb, 69 agp_generic_enable, 70 agp_generic_alloc_memory, 71 agp_generic_free_memory, 72 agp_generic_bind_memory, 73 agp_generic_unbind_memory, 74 }; 75 76 int 77 agp_ali_match(struct device *parent, struct cfdata *match, void *aux) 78 { 79 struct pci_attach_args *pa = aux; 80 81 if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, NULL, NULL) 82 == 0) 83 return 0; 84 85 return 1; 86 } 87 88 int 89 agp_ali_attach(struct device *parent, struct device *self, void *aux) 90 { 91 struct agp_softc *sc = (struct agp_softc *)self; 92 struct agp_ali_softc *asc; 93 struct pci_attach_args *pa = aux; 94 struct agp_gatt *gatt; 95 pcireg_t reg; 96 97 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); 98 if (asc == NULL) { 99 printf(": failed to allocate softc\n"); 100 return ENOMEM; 101 } 102 sc->as_chipc = asc; 103 sc->as_methods = &agp_ali_methods; 104 105 if (agp_map_aperture(pa, sc) != 0) { 106 printf(": failed to map aperture\n"); 107 free(asc, M_AGP); 108 return ENXIO; 109 } 110 111 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 112 NULL); 113 114 asc->initial_aperture = agp_ali_get_aperture(sc); 115 116 for (;;) { 117 gatt = agp_alloc_gatt(sc); 118 if (gatt != NULL) 119 break; 120 121 /* 122 * Probably contigmalloc failure. Try reducing the 123 * aperture so that the gatt size reduces. 124 */ 125 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 126 agp_generic_detach(sc); 127 printf(": failed to set aperture\n"); 128 return ENOMEM; 129 } 130 } 131 asc->gatt = gatt; 132 133 /* Install the gatt. */ 134 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE); 135 reg = (reg & 0xff) | gatt->ag_physical; 136 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg); 137 138 /* Enable the TLB. */ 139 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL); 140 reg = (reg & ~0xff) | 0x10; 141 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg); 142 143 return 0; 144 } 145 146 #if 0 147 static int 148 agp_ali_detach(struct agp_softc *sc) 149 { 150 int error; 151 pcireg_t reg; 152 struct agp_ali_softc *asc = sc->as_chipc; 153 154 error = agp_generic_detach(sc); 155 if (error) 156 return error; 157 158 /* Disable the TLB.. */ 159 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 160 reg &= ~0xff; 161 reg |= 0x90; 162 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 163 164 /* Put the aperture back the way it started. */ 165 AGP_SET_APERTURE(sc, asc->initial_aperture); 166 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 167 reg &= 0xff; 168 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 169 170 agp_free_gatt(sc, asc->gatt); 171 return 0; 172 } 173 #endif 174 175 #define M 1024*1024 176 177 static u_int32_t agp_ali_table[] = { 178 0, /* 0 - invalid */ 179 1, /* 1 - invalid */ 180 2, /* 2 - invalid */ 181 4*M, /* 3 - invalid */ 182 8*M, /* 4 - invalid */ 183 0, /* 5 - invalid */ 184 16*M, /* 6 - invalid */ 185 32*M, /* 7 - invalid */ 186 64*M, /* 8 - invalid */ 187 128*M, /* 9 - invalid */ 188 256*M, /* 10 - invalid */ 189 }; 190 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 191 192 static u_int32_t 193 agp_ali_get_aperture(struct agp_softc *sc) 194 { 195 int i; 196 197 /* 198 * The aperture size is derived from the low bits of attbase. 199 * I'm not sure this is correct.. 200 */ 201 i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xff; 202 if (i >= agp_ali_table_size) 203 return 0; 204 return agp_ali_table[i]; 205 } 206 207 static int 208 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) 209 { 210 int i; 211 pcireg_t reg; 212 213 for (i = 0; i < agp_ali_table_size; i++) 214 if (agp_ali_table[i] == aperture) 215 break; 216 if (i == agp_ali_table_size) 217 return EINVAL; 218 219 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 220 reg &= ~0xff; 221 reg |= i; 222 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 223 return 0; 224 } 225 226 static int 227 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 228 { 229 struct agp_ali_softc *asc = sc->as_chipc; 230 231 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 232 return EINVAL; 233 234 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 235 return 0; 236 } 237 238 static int 239 agp_ali_unbind_page(struct agp_softc *sc, off_t offset) 240 { 241 struct agp_ali_softc *asc = sc->as_chipc; 242 243 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 244 return EINVAL; 245 246 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 247 return 0; 248 } 249 250 static void 251 agp_ali_flush_tlb(struct agp_softc *sc) 252 { 253 pcireg_t reg; 254 255 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 256 reg &= ~0xff; 257 reg |= 0x90; 258 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 259 reg &= ~0xff; 260 reg |= 0x10; 261 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 262 } 263
Indexes created Thu Sep 25 16:09:42 GMT 2025