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