1 /*- 2 * Copyright (c) 2000 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/malloc.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/bus.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 #include <sys/proc.h> 39 40 #include <dev/agp/agppriv.h> 41 #include <dev/agp/agpreg.h> 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 45 #include <vm/vm.h> 46 #include <vm/vm_object.h> 47 #include <vm/pmap.h> 48 49 struct agp_ali_softc { 50 struct agp_softc agp; 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53 }; 54 55 static const char* 56 agp_ali_match(device_t dev) 57 { 58 if (pci_get_class(dev) != PCIC_BRIDGE 59 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 60 return NULL; 61 62 if (agp_find_caps(dev) == 0) 63 return NULL; 64 65 switch (pci_get_devid(dev)) { 66 case 0x167110b9: 67 return ("Ali M1671 host to AGP bridge"); 68 case 0x154110b9: 69 return ("Ali M1541 host to AGP bridge"); 70 case 0x162110b9: 71 return ("Ali M1621 host to AGP bridge"); 72 } 73 74 return NULL; 75 } 76 77 static int 78 agp_ali_probe(device_t dev) 79 { 80 const char *desc; 81 82 if (resource_disabled("agp", device_get_unit(dev))) 83 return (ENXIO); 84 desc = agp_ali_match(dev); 85 if (desc) { 86 device_set_desc(dev, desc); 87 return BUS_PROBE_DEFAULT; 88 } 89 90 return ENXIO; 91 } 92 93 static int 94 agp_ali_attach(device_t dev) 95 { 96 struct agp_ali_softc *sc = device_get_softc(dev); 97 struct agp_gatt *gatt; 98 int error; 99 u_int32_t attbase; 100 101 error = agp_generic_attach(dev); 102 if (error) 103 return error; 104 105 sc->initial_aperture = AGP_GET_APERTURE(dev); 106 if (sc->initial_aperture == 0) { 107 device_printf(dev, "bad initial aperture size, disabling\n"); 108 return ENXIO; 109 } 110 111 for (;;) { 112 gatt = agp_alloc_gatt(dev); 113 if (gatt) 114 break; 115 116 /* 117 * Probably contigmalloc failure. Try reducing the 118 * aperture so that the gatt size reduces. 119 */ 120 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 121 agp_generic_detach(dev); 122 return ENOMEM; 123 } 124 } 125 sc->gatt = gatt; 126 127 /* Install the gatt. */ 128 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 129 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical | 130 (attbase & 0xfff), 4); 131 132 /* Enable the TLB. */ 133 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 134 135 return 0; 136 } 137 138 static int 139 agp_ali_detach(device_t dev) 140 { 141 struct agp_ali_softc *sc = device_get_softc(dev); 142 u_int32_t attbase; 143 144 agp_free_cdev(dev); 145 146 /* Disable the TLB.. */ 147 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 148 149 /* Put the aperture back the way it started. */ 150 AGP_SET_APERTURE(dev, sc->initial_aperture); 151 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 152 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4); 153 154 agp_free_gatt(sc->gatt); 155 agp_free_res(dev); 156 return 0; 157 } 158 159 #define M 1024*1024 160 161 static u_int32_t agp_ali_table[] = { 162 0, /* 0 - invalid */ 163 1, /* 1 - invalid */ 164 2, /* 2 - invalid */ 165 4*M, /* 3 - invalid */ 166 8*M, /* 4 - invalid */ 167 0, /* 5 - invalid */ 168 16*M, /* 6 - invalid */ 169 32*M, /* 7 - invalid */ 170 64*M, /* 8 - invalid */ 171 128*M, /* 9 - invalid */ 172 256*M, /* 10 - invalid */ 173 }; 174 #define AGP_ALI_TABLE_SIZE nitems(agp_ali_table) 175 176 static u_int32_t 177 agp_ali_get_aperture(device_t dev) 178 { 179 /* 180 * The aperture size is derived from the low bits of attbase. 181 * I'm not sure this is correct.. 182 */ 183 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf; 184 if (i >= AGP_ALI_TABLE_SIZE) 185 return 0; 186 return agp_ali_table[i]; 187 } 188 189 static int 190 agp_ali_set_aperture(device_t dev, u_int32_t aperture) 191 { 192 int i; 193 u_int32_t attbase; 194 195 for (i = 0; i < AGP_ALI_TABLE_SIZE; i++) 196 if (agp_ali_table[i] == aperture) 197 break; 198 if (i == AGP_ALI_TABLE_SIZE) 199 return EINVAL; 200 201 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 202 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4); 203 return 0; 204 } 205 206 static int 207 agp_ali_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 208 { 209 struct agp_ali_softc *sc = device_get_softc(dev); 210 211 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 212 return EINVAL; 213 214 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 215 return 0; 216 } 217 218 static int 219 agp_ali_unbind_page(device_t dev, vm_offset_t offset) 220 { 221 struct agp_ali_softc *sc = device_get_softc(dev); 222 223 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 224 return EINVAL; 225 226 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 227 return 0; 228 } 229 230 static void 231 agp_ali_flush_tlb(device_t dev) 232 { 233 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 234 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 235 } 236 237 static device_method_t agp_ali_methods[] = { 238 /* Device interface */ 239 DEVMETHOD(device_probe, agp_ali_probe), 240 DEVMETHOD(device_attach, agp_ali_attach), 241 DEVMETHOD(device_detach, agp_ali_detach), 242 DEVMETHOD(device_shutdown, bus_generic_shutdown), 243 DEVMETHOD(device_suspend, bus_generic_suspend), 244 DEVMETHOD(device_resume, bus_generic_resume), 245 246 /* AGP interface */ 247 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 248 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 249 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 250 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 251 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 252 DEVMETHOD(agp_enable, agp_generic_enable), 253 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 254 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 255 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 256 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 257 258 { 0, 0 } 259 }; 260 261 static driver_t agp_ali_driver = { 262 "agp", 263 agp_ali_methods, 264 sizeof(struct agp_ali_softc), 265 }; 266 267 static devclass_t agp_devclass; 268 269 DRIVER_MODULE(agp_ali, hostb, agp_ali_driver, agp_devclass, 0, 0); 270 MODULE_DEPEND(agp_ali, agp, 1, 1, 1); 271 MODULE_DEPEND(agp_ali, pci, 1, 1, 1); 272