agp_ali.c revision 1.7
1 /* $NetBSD: agp_ali.c,v 1.7 2005/06/28 00:28:41 thorpej 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/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: agp_ali.c,v 1.7 2005/06/28 00:28:41 thorpej Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/systm.h> 38 #include <sys/proc.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/lock.h> 42 #include <sys/agpio.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <dev/pci/pcivar.h> 47 #include <dev/pci/pcireg.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 struct agp_softc agp; 55 u_int32_t initial_aperture; /* aperture size at startup */ 56 struct agp_gatt *gatt; 57 }; 58 59 static u_int32_t agp_ali_get_aperture(struct agp_softc *); 60 static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t); 61 static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t); 62 static int agp_ali_unbind_page(struct agp_softc *, off_t); 63 static void agp_ali_flush_tlb(struct agp_softc *); 64 65 66 static struct agp_methods agp_ali_methods = { 67 agp_ali_get_aperture, 68 agp_ali_set_aperture, 69 agp_ali_bind_page, 70 agp_ali_unbind_page, 71 agp_ali_flush_tlb, 72 agp_generic_enable, 73 agp_generic_alloc_memory, 74 agp_generic_free_memory, 75 agp_generic_bind_memory, 76 agp_generic_unbind_memory, 77 }; 78 79 int 80 agp_ali_attach(struct device *parent, struct device *self, void *aux) 81 { 82 struct agp_softc *sc = (struct agp_softc *)self; 83 struct agp_ali_softc *asc; 84 struct pci_attach_args *pa = aux; 85 struct agp_gatt *gatt; 86 pcireg_t reg; 87 88 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); 89 if (asc == NULL) { 90 aprint_error(": failed to allocate softc\n"); 91 return ENOMEM; 92 } 93 sc->as_chipc = asc; 94 sc->as_methods = &agp_ali_methods; 95 96 if (agp_map_aperture(pa, sc) != 0) { 97 aprint_error(": failed to map aperture\n"); 98 free(asc, M_AGP); 99 return ENXIO; 100 } 101 102 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 103 NULL); 104 105 asc->initial_aperture = agp_ali_get_aperture(sc); 106 107 for (;;) { 108 gatt = agp_alloc_gatt(sc); 109 if (gatt != NULL) 110 break; 111 112 /* 113 * Probably contigmalloc failure. Try reducing the 114 * aperture so that the gatt size reduces. 115 */ 116 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 117 agp_generic_detach(sc); 118 aprint_error(": failed to set aperture\n"); 119 return ENOMEM; 120 } 121 } 122 asc->gatt = gatt; 123 124 /* Install the gatt. */ 125 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE); 126 reg = (reg & 0xfff) | (gatt->ag_physical & ~0xfff); 127 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg); 128 129 /* Enable the TLB. */ 130 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL); 131 reg = (reg & ~0xff) | 0x10; 132 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg); 133 134 return 0; 135 } 136 137 #if 0 138 static int 139 agp_ali_detach(struct agp_softc *sc) 140 { 141 int error; 142 pcireg_t reg; 143 struct agp_ali_softc *asc = sc->as_chipc; 144 145 error = agp_generic_detach(sc); 146 if (error) 147 return error; 148 149 /* Disable the TLB.. */ 150 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 151 reg &= ~0xff; 152 reg |= 0x90; 153 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 154 155 /* Put the aperture back the way it started. */ 156 AGP_SET_APERTURE(sc, asc->initial_aperture); 157 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 158 reg &= 0xf; 159 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 160 161 agp_free_gatt(sc, asc->gatt); 162 return 0; 163 } 164 #endif 165 166 #define M 1024*1024 167 168 static const u_int32_t agp_ali_table[] = { 169 0, /* 0 - invalid */ 170 1, /* 1 - invalid */ 171 2, /* 2 - invalid */ 172 4*M, /* 3 - invalid */ 173 8*M, /* 4 - invalid */ 174 0, /* 5 - invalid */ 175 16*M, /* 6 - invalid */ 176 32*M, /* 7 - invalid */ 177 64*M, /* 8 - invalid */ 178 128*M, /* 9 - invalid */ 179 256*M, /* 10 - invalid */ 180 }; 181 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 182 183 static u_int32_t 184 agp_ali_get_aperture(struct agp_softc *sc) 185 { 186 int i; 187 188 /* 189 * The aperture size is derived from the low bits of attbase. 190 * I'm not sure this is correct.. 191 */ 192 i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xf; 193 if (i >= agp_ali_table_size) 194 return 0; 195 return agp_ali_table[i]; 196 } 197 198 static int 199 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) 200 { 201 int i; 202 pcireg_t reg; 203 204 for (i = 0; i < agp_ali_table_size; i++) 205 if (agp_ali_table[i] == aperture) 206 break; 207 if (i == agp_ali_table_size) 208 return EINVAL; 209 210 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 211 reg &= ~0xf; 212 reg |= i; 213 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 214 return 0; 215 } 216 217 static int 218 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 219 { 220 struct agp_ali_softc *asc = sc->as_chipc; 221 222 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 223 return EINVAL; 224 225 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 226 return 0; 227 } 228 229 static int 230 agp_ali_unbind_page(struct agp_softc *sc, off_t offset) 231 { 232 struct agp_ali_softc *asc = sc->as_chipc; 233 234 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 235 return EINVAL; 236 237 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 238 return 0; 239 } 240 241 static void 242 agp_ali_flush_tlb(struct agp_softc *sc) 243 { 244 pcireg_t reg; 245 246 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 247 reg &= ~0xff; 248 reg |= 0x90; 249 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 250 reg &= ~0xff; 251 reg |= 0x10; 252 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 253 } 254
Indexes created Tue Sep 23 14:10:03 GMT 2025