agp_ali.c revision 1.15
1 /* $NetBSD: agp_ali.c,v 1.15 2008/06/09 06:49:54 freza 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 1.15 2008/06/09 06:49:54 freza 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 u_int32_t initial_aperture; /* aperture size at startup */ 54 struct agp_gatt *gatt; 55 }; 56 57 static u_int32_t agp_ali_get_aperture(struct agp_softc *); 58 static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t); 59 static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t); 60 static int agp_ali_unbind_page(struct agp_softc *, off_t); 61 static void agp_ali_flush_tlb(struct agp_softc *); 62 63 64 static struct agp_methods agp_ali_methods = { 65 agp_ali_get_aperture, 66 agp_ali_set_aperture, 67 agp_ali_bind_page, 68 agp_ali_unbind_page, 69 agp_ali_flush_tlb, 70 agp_generic_enable, 71 agp_generic_alloc_memory, 72 agp_generic_free_memory, 73 agp_generic_bind_memory, 74 agp_generic_unbind_memory, 75 }; 76 77 int 78 agp_ali_attach(device_t parent, device_t self, void *aux) 79 { 80 struct agp_softc *sc = device_private(self); 81 struct agp_ali_softc *asc; 82 struct pci_attach_args *pa = aux; 83 struct agp_gatt *gatt; 84 pcireg_t reg; 85 86 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); 87 if (asc == NULL) { 88 aprint_error(": failed to allocate softc\n"); 89 return ENOMEM; 90 } 91 sc->as_chipc = asc; 92 sc->as_methods = &agp_ali_methods; 93 94 if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { 95 aprint_error(": failed to map aperture\n"); 96 free(asc, M_AGP); 97 return ENXIO; 98 } 99 100 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 101 NULL); 102 103 asc->initial_aperture = agp_ali_get_aperture(sc); 104 105 for (;;) { 106 gatt = agp_alloc_gatt(sc); 107 if (gatt != NULL) 108 break; 109 110 /* 111 * Probably contigmalloc failure. Try reducing the 112 * aperture so that the gatt size reduces. 113 */ 114 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 115 agp_generic_detach(sc); 116 aprint_error(": failed to set aperture\n"); 117 return ENOMEM; 118 } 119 } 120 asc->gatt = gatt; 121 122 /* Install the gatt. */ 123 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE); 124 reg = (reg & 0xfff) | (gatt->ag_physical & ~0xfff); 125 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg); 126 127 /* Enable the TLB. */ 128 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL); 129 reg = (reg & ~0xff) | 0x10; 130 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg); 131 132 return 0; 133 } 134 135 #if 0 136 static int 137 agp_ali_detach(struct agp_softc *sc) 138 { 139 int error; 140 pcireg_t reg; 141 struct agp_ali_softc *asc = sc->as_chipc; 142 143 error = agp_generic_detach(sc); 144 if (error) 145 return error; 146 147 /* Disable the TLB.. */ 148 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 149 reg &= ~0xff; 150 reg |= 0x90; 151 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 152 153 /* Put the aperture back the way it started. */ 154 AGP_SET_APERTURE(sc, asc->initial_aperture); 155 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 156 reg &= 0xf; 157 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 158 159 agp_free_gatt(sc, asc->gatt); 160 return 0; 161 } 162 #endif 163 164 #define M 1024*1024 165 166 static const u_int32_t agp_ali_table[] = { 167 0, /* 0 - invalid */ 168 1, /* 1 - invalid */ 169 2, /* 2 - invalid */ 170 4*M, /* 3 */ 171 8*M, /* 4 */ 172 0, /* 5 - Reserved */ 173 16*M, /* 6 */ 174 32*M, /* 7 */ 175 64*M, /* 8 */ 176 128*M, /* 9 */ 177 256*M, /* 10 */ 178 }; 179 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 180 181 static u_int32_t 182 agp_ali_get_aperture(struct agp_softc *sc) 183 { 184 int i; 185 186 /* 187 * The aperture size is derived from the low bits of attbase. 188 * I'm not sure this is correct.. 189 */ 190 i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xf; 191 if (i >= agp_ali_table_size) 192 return 0; 193 return agp_ali_table[i]; 194 } 195 196 static int 197 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) 198 { 199 int i; 200 pcireg_t reg; 201 202 if (aperture & (aperture - 1) || aperture < 1*M) 203 return EINVAL; 204 205 for (i = 0; i < agp_ali_table_size; i++) 206 if (agp_ali_table[i] == aperture) 207 break; 208 if (i == agp_ali_table_size) 209 return EINVAL; 210 211 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); 212 reg &= ~0xf; 213 reg |= i; 214 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); 215 return 0; 216 } 217 218 static int 219 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 220 { 221 struct agp_ali_softc *asc = sc->as_chipc; 222 223 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 224 return EINVAL; 225 226 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 227 return 0; 228 } 229 230 static int 231 agp_ali_unbind_page(struct agp_softc *sc, off_t offset) 232 { 233 struct agp_ali_softc *asc = sc->as_chipc; 234 235 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 236 return EINVAL; 237 238 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 239 return 0; 240 } 241 242 static void 243 agp_ali_flush_tlb(struct agp_softc *sc) 244 { 245 pcireg_t reg; 246 247 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); 248 reg &= ~0xff; 249 reg |= 0x90; 250 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 251 reg &= ~0xff; 252 reg |= 0x10; 253 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); 254 } 255
Indexes created Wed Sep 24 05:09:52 GMT 2025