1 /* $NetBSD: agp_ali.c,v 1.2 2001/09/15 00:25:00 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/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_attach(struct device *parent, struct device *self, void *aux) 78 { 79 struct agp_softc *sc = (struct agp_softc *)self; 80 struct agp_ali_softc *asc; 81 struct pci_attach_args *pa = aux; 82 struct agp_gatt *gatt; 83 pcireg_t reg; 84 85 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); 86 if (asc == NULL) { 87 printf(": failed to allocate softc\n"); 88 return ENOMEM; 89 } 90 sc->as_chipc = asc; 91 sc->as_methods = &agp_ali_methods; 92 93 if (agp_map_aperture(pa, sc) != 0) { 94 printf(": failed to map aperture\n"); 95 free(asc, M_AGP); 96 return ENXIO; 97 } 98 99 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 100 NULL); 101 102 asc->initial_aperture = agp_ali_get_aperture(sc); 103 104 for (;;) { 105 gatt = agp_alloc_gatt(sc); 106 if (gatt != NULL) 107 break; 108 109 /* 110 * Probably contigmalloc failure. Try reducing the 111 * aperture so that the gatt size reduces. 112 */ 113 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 114 agp_generic_detach(sc); 115 printf(": failed to set aperture\n"); 116 return ENOMEM; 117 } 118 } 119 asc->gatt = gatt; 120 121 /* Install the gatt. */ 122 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE); 123 reg = (reg & 0xff) | gatt->ag_physical; 124 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg); 125 126 /* Enable the TLB. */ 127 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL); 128 reg = (reg & ~0xff) | 0x10; 129 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg); 130 131 return 0; 132 } 133 134 #if 0 135 static int 136 agp_ali_detach(struct agp_softc *sc) 137 { 138 int error; 139 pcireg_t reg; 140 struct agp_ali_softc *asc = sc->as_chipc; 141 142 error = agp_generic_detach(sc); 143 if (error) 144 return error; 145 146 /* Disable the TLB.. */ 147 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 148 reg &= ~0xff; 149 reg |= 0x90; 150 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 151 152 /* Put the aperture back the way it started. */ 153 AGP_SET_APERTURE(sc, asc->initial_aperture); 154 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 155 reg &= 0xff; 156 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 157 158 agp_free_gatt(sc, asc->gatt); 159 return 0; 160 } 161 #endif 162 163 #define M 1024*1024 164 165 static u_int32_t agp_ali_table[] = { 166 0, /* 0 - invalid */ 167 1, /* 1 - invalid */ 168 2, /* 2 - invalid */ 169 4*M, /* 3 - invalid */ 170 8*M, /* 4 - invalid */ 171 0, /* 5 - invalid */ 172 16*M, /* 6 - invalid */ 173 32*M, /* 7 - invalid */ 174 64*M, /* 8 - invalid */ 175 128*M, /* 9 - invalid */ 176 256*M, /* 10 - invalid */ 177 }; 178 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 179 180 static u_int32_t 181 agp_ali_get_aperture(struct agp_softc *sc) 182 { 183 int i; 184 185 /* 186 * The aperture size is derived from the low bits of attbase. 187 * I'm not sure this is correct.. 188 */ 189 i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xff; 190 if (i >= agp_ali_table_size) 191 return 0; 192 return agp_ali_table[i]; 193 } 194 195 static int 196 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) 197 { 198 int i; 199 pcireg_t reg; 200 201 for (i = 0; i < agp_ali_table_size; i++) 202 if (agp_ali_table[i] == aperture) 203 break; 204 if (i == agp_ali_table_size) 205 return EINVAL; 206 207 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 208 reg &= ~0xff; 209 reg |= i; 210 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 211 return 0; 212 } 213 214 static int 215 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 216 { 217 struct agp_ali_softc *asc = sc->as_chipc; 218 219 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 220 return EINVAL; 221 222 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 223 return 0; 224 } 225 226 static int 227 agp_ali_unbind_page(struct agp_softc *sc, off_t offset) 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] = 0; 235 return 0; 236 } 237 238 static void 239 agp_ali_flush_tlb(struct agp_softc *sc) 240 { 241 pcireg_t reg; 242 243 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 244 reg &= ~0xff; 245 reg |= 0x90; 246 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 247 reg &= ~0xff; 248 reg |= 0x10; 249 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 250 } 251