agp_ali.c revision 1.14
1 /* $NetBSD: agp_ali.c,v 1.14 2008/04/13 13:07:31 njoly 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 1.14 2008/04/13 13:07:31 njoly 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 <uvm/uvm_extern.h> 44 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/pcireg.h> 47 #include <dev/pci/agpvar.h> 48 #include <dev/pci/agpreg.h> 49 50 #include <sys/bus.h> 51 52 struct agp_ali_softc { 53 struct agp_softc agp; 54 u_int32_t initial_aperture; /* aperture size at startup */ 55 struct agp_gatt *gatt; 56 }; 57 58 static u_int32_t agp_ali_get_aperture(struct agp_softc *); 59 static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t); 60 static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t); 61 static int agp_ali_unbind_page(struct agp_softc *, off_t); 62 static void agp_ali_flush_tlb(struct agp_softc *); 63 64 65 static struct agp_methods agp_ali_methods = { 66 agp_ali_get_aperture, 67 agp_ali_set_aperture, 68 agp_ali_bind_page, 69 agp_ali_unbind_page, 70 agp_ali_flush_tlb, 71 agp_generic_enable, 72 agp_generic_alloc_memory, 73 agp_generic_free_memory, 74 agp_generic_bind_memory, 75 agp_generic_unbind_memory, 76 }; 77 78 int 79 agp_ali_attach(struct device *parent, struct device *self, void *aux) 80 { 81 struct agp_softc *sc = (struct agp_softc *)self; 82 struct agp_ali_softc *asc; 83 struct pci_attach_args *pa = aux; 84 struct agp_gatt *gatt; 85 pcireg_t reg; 86 87 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); 88 if (asc == NULL) { 89 aprint_error(": failed to allocate softc\n"); 90 return ENOMEM; 91 } 92 sc->as_chipc = asc; 93 sc->as_methods = &agp_ali_methods; 94 95 if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { 96 aprint_error(": failed to map aperture\n"); 97 free(asc, M_AGP); 98 return ENXIO; 99 } 100 101 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 102 NULL); 103 104 asc->initial_aperture = agp_ali_get_aperture(sc); 105 106 for (;;) { 107 gatt = agp_alloc_gatt(sc); 108 if (gatt != NULL) 109 break; 110 111 /* 112 * Probably contigmalloc failure. Try reducing the 113 * aperture so that the gatt size reduces. 114 */ 115 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 116 agp_generic_detach(sc); 117 aprint_error(": failed to set aperture\n"); 118 return ENOMEM; 119 } 120 } 121 asc->gatt = gatt; 122 123 /* Install the gatt. */ 124 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE); 125 reg = (reg & 0xfff) | (gatt->ag_physical & ~0xfff); 126 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg); 127 128 /* Enable the TLB. */ 129 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL); 130 reg = (reg & ~0xff) | 0x10; 131 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg); 132 133 return 0; 134 } 135 136 #if 0 137 static int 138 agp_ali_detach(struct agp_softc *sc) 139 { 140 int error; 141 pcireg_t reg; 142 struct agp_ali_softc *asc = sc->as_chipc; 143 144 error = agp_generic_detach(sc); 145 if (error) 146 return error; 147 148 /* Disable the TLB.. */ 149 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 150 reg &= ~0xff; 151 reg |= 0x90; 152 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 153 154 /* Put the aperture back the way it started. */ 155 AGP_SET_APERTURE(sc, asc->initial_aperture); 156 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 157 reg &= 0xf; 158 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 159 160 agp_free_gatt(sc, asc->gatt); 161 return 0; 162 } 163 #endif 164 165 #define M 1024*1024 166 167 static const u_int32_t agp_ali_table[] = { 168 0, /* 0 - invalid */ 169 1, /* 1 - invalid */ 170 2, /* 2 - invalid */ 171 4*M, /* 3 */ 172 8*M, /* 4 */ 173 0, /* 5 - Reserved */ 174 16*M, /* 6 */ 175 32*M, /* 7 */ 176 64*M, /* 8 */ 177 128*M, /* 9 */ 178 256*M, /* 10 */ 179 }; 180 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 181 182 static u_int32_t 183 agp_ali_get_aperture(struct agp_softc *sc) 184 { 185 int i; 186 187 /* 188 * The aperture size is derived from the low bits of attbase. 189 * I'm not sure this is correct.. 190 */ 191 i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xf; 192 if (i >= agp_ali_table_size) 193 return 0; 194 return agp_ali_table[i]; 195 } 196 197 static int 198 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) 199 { 200 int i; 201 pcireg_t reg; 202 203 if (aperture & (aperture - 1) || aperture < 1*M) 204 return EINVAL; 205 206 for (i = 0; i < agp_ali_table_size; i++) 207 if (agp_ali_table[i] == aperture) 208 break; 209 if (i == agp_ali_table_size) 210 return EINVAL; 211 212 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 213 reg &= ~0xf; 214 reg |= i; 215 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 216 return 0; 217 } 218 219 static int 220 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 221 { 222 struct agp_ali_softc *asc = sc->as_chipc; 223 224 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 225 return EINVAL; 226 227 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 228 return 0; 229 } 230 231 static int 232 agp_ali_unbind_page(struct agp_softc *sc, off_t offset) 233 { 234 struct agp_ali_softc *asc = sc->as_chipc; 235 236 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 237 return EINVAL; 238 239 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 240 return 0; 241 } 242 243 static void 244 agp_ali_flush_tlb(struct agp_softc *sc) 245 { 246 pcireg_t reg; 247 248 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 249 reg &= ~0xff; 250 reg |= 0x90; 251 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 252 reg &= ~0xff; 253 reg |= 0x10; 254 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 255 } 256
Indexes created Wed Sep 24 02:09:48 GMT 2025