1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 42 #include <dev/agp/agppriv.h> 43 #include <dev/agp/agpreg.h> 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pcireg.h> 46 47 #include <vm/vm.h> 48 #include <vm/vm_object.h> 49 #include <vm/pmap.h> 50 51 struct agp_ali_softc { 52 struct agp_softc agp; 53 u_int32_t initial_aperture; /* aperture size at startup */ 54 struct agp_gatt *gatt; 55 }; 56 57 static const char* 58 agp_ali_match(device_t dev) 59 { 60 if (pci_get_class(dev) != PCIC_BRIDGE 61 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 62 return NULL; 63 64 if (agp_find_caps(dev) == 0) 65 return NULL; 66 67 switch (pci_get_devid(dev)) { 68 case 0x167110b9: 69 return ("Ali M1671 host to AGP bridge"); 70 case 0x154110b9: 71 return ("Ali M1541 host to AGP bridge"); 72 case 0x162110b9: 73 return ("Ali M1621 host to AGP bridge"); 74 } 75 76 return NULL; 77 } 78 79 static int 80 agp_ali_probe(device_t dev) 81 { 82 const char *desc; 83 84 if (resource_disabled("agp", device_get_unit(dev))) 85 return (ENXIO); 86 desc = agp_ali_match(dev); 87 if (desc) { 88 device_set_desc(dev, desc); 89 return BUS_PROBE_DEFAULT; 90 } 91 92 return ENXIO; 93 } 94 95 static int 96 agp_ali_attach(device_t dev) 97 { 98 struct agp_ali_softc *sc = device_get_softc(dev); 99 struct agp_gatt *gatt; 100 int error; 101 u_int32_t attbase; 102 103 error = agp_generic_attach(dev); 104 if (error) 105 return error; 106 107 sc->initial_aperture = AGP_GET_APERTURE(dev); 108 if (sc->initial_aperture == 0) { 109 device_printf(dev, "bad initial aperture size, disabling\n"); 110 return ENXIO; 111 } 112 113 for (;;) { 114 gatt = agp_alloc_gatt(dev); 115 if (gatt) 116 break; 117 118 /* 119 * Probably contigmalloc failure. Try reducing the 120 * aperture so that the gatt size reduces. 121 */ 122 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 123 agp_generic_detach(dev); 124 return ENOMEM; 125 } 126 } 127 sc->gatt = gatt; 128 129 /* Install the gatt. */ 130 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 131 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical | 132 (attbase & 0xfff), 4); 133 134 /* Enable the TLB. */ 135 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 136 137 return 0; 138 } 139 140 static int 141 agp_ali_detach(device_t dev) 142 { 143 struct agp_ali_softc *sc = device_get_softc(dev); 144 u_int32_t attbase; 145 146 agp_free_cdev(dev); 147 148 /* Disable the TLB.. */ 149 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 150 151 /* Put the aperture back the way it started. */ 152 AGP_SET_APERTURE(dev, sc->initial_aperture); 153 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 154 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4); 155 156 agp_free_gatt(sc->gatt); 157 agp_free_res(dev); 158 return 0; 159 } 160 161 #define M 1024*1024 162 163 static u_int32_t agp_ali_table[] = { 164 0, /* 0 - invalid */ 165 1, /* 1 - invalid */ 166 2, /* 2 - invalid */ 167 4*M, /* 3 - invalid */ 168 8*M, /* 4 - invalid */ 169 0, /* 5 - invalid */ 170 16*M, /* 6 - invalid */ 171 32*M, /* 7 - invalid */ 172 64*M, /* 8 - invalid */ 173 128*M, /* 9 - invalid */ 174 256*M, /* 10 - invalid */ 175 }; 176 #define AGP_ALI_TABLE_SIZE nitems(agp_ali_table) 177 178 static u_int32_t 179 agp_ali_get_aperture(device_t dev) 180 { 181 /* 182 * The aperture size is derived from the low bits of attbase. 183 * I'm not sure this is correct.. 184 */ 185 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf; 186 if (i >= AGP_ALI_TABLE_SIZE) 187 return 0; 188 return agp_ali_table[i]; 189 } 190 191 static int 192 agp_ali_set_aperture(device_t dev, u_int32_t aperture) 193 { 194 int i; 195 u_int32_t attbase; 196 197 for (i = 0; i < AGP_ALI_TABLE_SIZE; i++) 198 if (agp_ali_table[i] == aperture) 199 break; 200 if (i == AGP_ALI_TABLE_SIZE) 201 return EINVAL; 202 203 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 204 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4); 205 return 0; 206 } 207 208 static int 209 agp_ali_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 210 { 211 struct agp_ali_softc *sc = device_get_softc(dev); 212 213 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 214 return EINVAL; 215 216 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 217 return 0; 218 } 219 220 static int 221 agp_ali_unbind_page(device_t dev, vm_offset_t offset) 222 { 223 struct agp_ali_softc *sc = device_get_softc(dev); 224 225 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 226 return EINVAL; 227 228 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 229 return 0; 230 } 231 232 static void 233 agp_ali_flush_tlb(device_t dev) 234 { 235 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 236 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 237 } 238 239 static device_method_t agp_ali_methods[] = { 240 /* Device interface */ 241 DEVMETHOD(device_probe, agp_ali_probe), 242 DEVMETHOD(device_attach, agp_ali_attach), 243 DEVMETHOD(device_detach, agp_ali_detach), 244 DEVMETHOD(device_shutdown, bus_generic_shutdown), 245 DEVMETHOD(device_suspend, bus_generic_suspend), 246 DEVMETHOD(device_resume, bus_generic_resume), 247 248 /* AGP interface */ 249 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 250 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 251 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 252 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 253 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 254 DEVMETHOD(agp_enable, agp_generic_enable), 255 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 256 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 257 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 258 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 259 260 { 0, 0 } 261 }; 262 263 static driver_t agp_ali_driver = { 264 "agp", 265 agp_ali_methods, 266 sizeof(struct agp_ali_softc), 267 }; 268 269 static devclass_t agp_devclass; 270 271 DRIVER_MODULE(agp_ali, hostb, agp_ali_driver, agp_devclass, 0, 0); 272 MODULE_DEPEND(agp_ali, agp, 1, 1, 1); 273 MODULE_DEPEND(agp_ali, pci, 1, 1, 1); 274