1 /* $NetBSD: agp_ali.c,v 1.16 2010/11/13 13:52:04 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_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 1.16 2010/11/13 13:52:04 uebayasi 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/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_ali_softc { 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53 }; 54 55 static u_int32_t agp_ali_get_aperture(struct agp_softc *); 56 static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t); 57 static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t); 58 static int agp_ali_unbind_page(struct agp_softc *, off_t); 59 static void agp_ali_flush_tlb(struct agp_softc *); 60 61 62 static struct agp_methods agp_ali_methods = { 63 agp_ali_get_aperture, 64 agp_ali_set_aperture, 65 agp_ali_bind_page, 66 agp_ali_unbind_page, 67 agp_ali_flush_tlb, 68 agp_generic_enable, 69 agp_generic_alloc_memory, 70 agp_generic_free_memory, 71 agp_generic_bind_memory, 72 agp_generic_unbind_memory, 73 }; 74 75 int 76 agp_ali_attach(device_t parent, device_t self, void *aux) 77 { 78 struct agp_softc *sc = device_private(self); 79 struct agp_ali_softc *asc; 80 struct pci_attach_args *pa = aux; 81 struct agp_gatt *gatt; 82 pcireg_t reg; 83 84 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); 85 if (asc == NULL) { 86 aprint_error(": failed to allocate softc\n"); 87 return ENOMEM; 88 } 89 sc->as_chipc = asc; 90 sc->as_methods = &agp_ali_methods; 91 92 if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { 93 aprint_error(": failed to map aperture\n"); 94 free(asc, M_AGP); 95 return ENXIO; 96 } 97 98 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 99 NULL); 100 101 asc->initial_aperture = agp_ali_get_aperture(sc); 102 103 for (;;) { 104 gatt = agp_alloc_gatt(sc); 105 if (gatt != NULL) 106 break; 107 108 /* 109 * Probably contigmalloc failure. Try reducing the 110 * aperture so that the gatt size reduces. 111 */ 112 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 113 agp_generic_detach(sc); 114 aprint_error(": failed to set aperture\n"); 115 return ENOMEM; 116 } 117 } 118 asc->gatt = gatt; 119 120 /* Install the gatt. */ 121 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE); 122 reg = (reg & 0xfff) | (gatt->ag_physical & ~0xfff); 123 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg); 124 125 /* Enable the TLB. */ 126 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL); 127 reg = (reg & ~0xff) | 0x10; 128 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg); 129 130 return 0; 131 } 132 133 #if 0 134 static int 135 agp_ali_detach(struct agp_softc *sc) 136 { 137 int error; 138 pcireg_t reg; 139 struct agp_ali_softc *asc = sc->as_chipc; 140 141 error = agp_generic_detach(sc); 142 if (error) 143 return error; 144 145 /* Disable the TLB.. */ 146 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 147 reg &= ~0xff; 148 reg |= 0x90; 149 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 150 151 /* Put the aperture back the way it started. */ 152 AGP_SET_APERTURE(sc, asc->initial_aperture); 153 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 154 reg &= 0xf; 155 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 156 157 agp_free_gatt(sc, asc->gatt); 158 return 0; 159 } 160 #endif 161 162 #define M 1024*1024 163 164 static const u_int32_t agp_ali_table[] = { 165 0, /* 0 - invalid */ 166 1, /* 1 - invalid */ 167 2, /* 2 - invalid */ 168 4*M, /* 3 */ 169 8*M, /* 4 */ 170 0, /* 5 - Reserved */ 171 16*M, /* 6 */ 172 32*M, /* 7 */ 173 64*M, /* 8 */ 174 128*M, /* 9 */ 175 256*M, /* 10 */ 176 }; 177 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 178 179 static u_int32_t 180 agp_ali_get_aperture(struct agp_softc *sc) 181 { 182 int i; 183 184 /* 185 * The aperture size is derived from the low bits of attbase. 186 * I'm not sure this is correct.. 187 */ 188 i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xf; 189 if (i >= agp_ali_table_size) 190 return 0; 191 return agp_ali_table[i]; 192 } 193 194 static int 195 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) 196 { 197 int i; 198 pcireg_t reg; 199 200 if (aperture & (aperture - 1) || aperture < 1*M) 201 return EINVAL; 202 203 for (i = 0; i < agp_ali_table_size; i++) 204 if (agp_ali_table[i] == aperture) 205 break; 206 if (i == agp_ali_table_size) 207 return EINVAL; 208 209 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 210 reg &= ~0xf; 211 reg |= i; 212 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 213 return 0; 214 } 215 216 static int 217 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 218 { 219 struct agp_ali_softc *asc = sc->as_chipc; 220 221 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 222 return EINVAL; 223 224 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 225 return 0; 226 } 227 228 static int 229 agp_ali_unbind_page(struct agp_softc *sc, off_t offset) 230 { 231 struct agp_ali_softc *asc = sc->as_chipc; 232 233 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 234 return EINVAL; 235 236 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 237 return 0; 238 } 239 240 static void 241 agp_ali_flush_tlb(struct agp_softc *sc) 242 { 243 pcireg_t reg; 244 245 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 246 reg &= ~0xff; 247 reg |= 0x90; 248 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 249 reg &= ~0xff; 250 reg |= 0x10; 251 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 252 } 253