1 /* $NetBSD: agp_ali.c,v 1.17 2019/11/10 21:16:36 chs 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 1.17 2019/11/10 21:16:36 chs 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_WAITOK); 85 sc->as_chipc = asc; 86 sc->as_methods = &agp_ali_methods; 87 88 if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { 89 aprint_error(": failed to map aperture\n"); 90 free(asc, M_AGP); 91 return ENXIO; 92 } 93 94 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 95 NULL); 96 97 asc->initial_aperture = agp_ali_get_aperture(sc); 98 99 for (;;) { 100 gatt = agp_alloc_gatt(sc); 101 if (gatt != NULL) 102 break; 103 104 /* 105 * Probably contigmalloc failure. Try reducing the 106 * aperture so that the gatt size reduces. 107 */ 108 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 109 agp_generic_detach(sc); 110 aprint_error(": failed to set aperture\n"); 111 return ENOMEM; 112 } 113 } 114 asc->gatt = gatt; 115 116 /* Install the gatt. */ 117 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE); 118 reg = (reg & 0xfff) | (gatt->ag_physical & ~0xfff); 119 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg); 120 121 /* Enable the TLB. */ 122 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL); 123 reg = (reg & ~0xff) | 0x10; 124 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg); 125 126 return 0; 127 } 128 129 #if 0 130 static int 131 agp_ali_detach(struct agp_softc *sc) 132 { 133 int error; 134 pcireg_t reg; 135 struct agp_ali_softc *asc = sc->as_chipc; 136 137 error = agp_generic_detach(sc); 138 if (error) 139 return error; 140 141 /* Disable the TLB.. */ 142 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 143 reg &= ~0xff; 144 reg |= 0x90; 145 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 146 147 /* Put the aperture back the way it started. */ 148 AGP_SET_APERTURE(sc, asc->initial_aperture); 149 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 150 reg &= 0xf; 151 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 152 153 agp_free_gatt(sc, asc->gatt); 154 return 0; 155 } 156 #endif 157 158 #define M 1024*1024 159 160 static const u_int32_t agp_ali_table[] = { 161 0, /* 0 - invalid */ 162 1, /* 1 - invalid */ 163 2, /* 2 - invalid */ 164 4*M, /* 3 */ 165 8*M, /* 4 */ 166 0, /* 5 - Reserved */ 167 16*M, /* 6 */ 168 32*M, /* 7 */ 169 64*M, /* 8 */ 170 128*M, /* 9 */ 171 256*M, /* 10 */ 172 }; 173 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 174 175 static u_int32_t 176 agp_ali_get_aperture(struct agp_softc *sc) 177 { 178 int i; 179 180 /* 181 * The aperture size is derived from the low bits of attbase. 182 * I'm not sure this is correct.. 183 */ 184 i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xf; 185 if (i >= agp_ali_table_size) 186 return 0; 187 return agp_ali_table[i]; 188 } 189 190 static int 191 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) 192 { 193 int i; 194 pcireg_t reg; 195 196 if (aperture & (aperture - 1) || aperture < 1*M) 197 return EINVAL; 198 199 for (i = 0; i < agp_ali_table_size; i++) 200 if (agp_ali_table[i] == aperture) 201 break; 202 if (i == agp_ali_table_size) 203 return EINVAL; 204 205 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 206 reg &= ~0xf; 207 reg |= i; 208 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 209 return 0; 210 } 211 212 static int 213 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 214 { 215 struct agp_ali_softc *asc = sc->as_chipc; 216 217 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 218 return EINVAL; 219 220 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 221 return 0; 222 } 223 224 static int 225 agp_ali_unbind_page(struct agp_softc *sc, off_t offset) 226 { 227 struct agp_ali_softc *asc = sc->as_chipc; 228 229 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 230 return EINVAL; 231 232 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 233 return 0; 234 } 235 236 static void 237 agp_ali_flush_tlb(struct agp_softc *sc) 238 { 239 pcireg_t reg; 240 241 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 242 reg &= ~0xff; 243 reg |= 0x90; 244 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 245 reg &= ~0xff; 246 reg |= 0x10; 247 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 248 } 249
Indexes created Sat Sep 20 22:09:52 GMT 2025