agp_sis.c revision 76827
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 * $FreeBSD: head/sys/dev/agp/agp_sis.c 76827 2001-05-19 01:28:09Z alfred $ 27 */ 28 29#include "opt_bus.h" 30#include "opt_pci.h" 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/malloc.h> 35#include <sys/kernel.h> 36#include <sys/bus.h> 37#include <sys/lock.h> 38#include <sys/mutex.h> 39 40#include <pci/pcivar.h> 41#include <pci/pcireg.h> 42#include <pci/agppriv.h> 43#include <pci/agpreg.h> 44 45#include <vm/vm.h> 46#include <vm/vm_object.h> 47#include <vm/pmap.h> 48 49struct agp_sis_softc { 50 struct agp_softc agp; 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53}; 54 55static const char* 56agp_sis_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 0x00011039: 67 return ("SiS 5591 host to AGP bridge"); 68 }; 69 70 if (pci_get_vendor(dev) == 0x1039) 71 return ("SIS Generic host to PCI bridge"); 72 73 return NULL; 74} 75 76static int 77agp_sis_probe(device_t dev) 78{ 79 const char *desc; 80 81 desc = agp_sis_match(dev); 82 if (desc) { 83 device_verbose(dev); 84 device_set_desc(dev, desc); 85 return 0; 86 } 87 88 return ENXIO; 89} 90 91static int 92agp_sis_attach(device_t dev) 93{ 94 struct agp_sis_softc *sc = device_get_softc(dev); 95 struct agp_gatt *gatt; 96 int error; 97 98 error = agp_generic_attach(dev); 99 if (error) 100 return error; 101 102 sc->initial_aperture = AGP_GET_APERTURE(dev); 103 104 for (;;) { 105 gatt = agp_alloc_gatt(dev); 106 if (gatt) 107 break; 108 109 /* 110 * Probably contigmalloc failure. Try reducing the 111 * aperture so that the gatt size reduces. 112 */ 113 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 114 agp_generic_detach(dev); 115 return ENOMEM; 116 } 117 } 118 sc->gatt = gatt; 119 120 /* Install the gatt. */ 121 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 122 123 /* Enable the aperture. */ 124 pci_write_config(dev, AGP_SIS_WINCTRL, 125 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 126 127 /* 128 * Enable the TLB and make it automatically invalidate entries 129 * when the GATT is written. 130 */ 131 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 132 133 return 0; 134} 135 136static int 137agp_sis_detach(device_t dev) 138{ 139 struct agp_sis_softc *sc = device_get_softc(dev); 140 int error; 141 142 error = agp_generic_detach(dev); 143 if (error) 144 return error; 145 146 /* Disable the aperture.. */ 147 pci_write_config(dev, AGP_SIS_WINCTRL, 148 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 149 150 /* and the TLB. */ 151 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 152 153 /* Put the aperture back the way it started. */ 154 AGP_SET_APERTURE(dev, sc->initial_aperture); 155 156 agp_free_gatt(sc->gatt); 157 return 0; 158} 159 160static u_int32_t 161agp_sis_get_aperture(device_t dev) 162{ 163 int gws; 164 165 /* 166 * The aperture size is equal to 4M<<gws. 167 */ 168 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 169 return (4*1024*1024) << gws; 170} 171 172static int 173agp_sis_set_aperture(device_t dev, u_int32_t aperture) 174{ 175 int gws; 176 177 /* 178 * Check for a power of two and make sure its within the 179 * programmable range. 180 */ 181 if (aperture & (aperture - 1) 182 || aperture < 4*1024*1024 183 || aperture > 256*1024*1024) 184 return EINVAL; 185 186 gws = ffs(aperture / 4*1024*1024) - 1; 187 188 pci_write_config(dev, AGP_SIS_WINCTRL, 189 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 190 | gws << 4), 1); 191 192 return 0; 193} 194 195static int 196agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 197{ 198 struct agp_sis_softc *sc = device_get_softc(dev); 199 200 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 201 return EINVAL; 202 203 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 204 return 0; 205} 206 207static int 208agp_sis_unbind_page(device_t dev, int offset) 209{ 210 struct agp_sis_softc *sc = device_get_softc(dev); 211 212 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 213 return EINVAL; 214 215 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 216 return 0; 217} 218 219static void 220agp_sis_flush_tlb(device_t dev) 221{ 222 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 223} 224 225static device_method_t agp_sis_methods[] = { 226 /* Device interface */ 227 DEVMETHOD(device_probe, agp_sis_probe), 228 DEVMETHOD(device_attach, agp_sis_attach), 229 DEVMETHOD(device_detach, agp_sis_detach), 230 DEVMETHOD(device_shutdown, bus_generic_shutdown), 231 DEVMETHOD(device_suspend, bus_generic_suspend), 232 DEVMETHOD(device_resume, bus_generic_resume), 233 234 /* AGP interface */ 235 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 236 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 237 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 238 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 239 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 240 DEVMETHOD(agp_enable, agp_generic_enable), 241 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 242 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 243 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 244 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 245 246 { 0, 0 } 247}; 248 249static driver_t agp_sis_driver = { 250 "agp", 251 agp_sis_methods, 252 sizeof(struct agp_sis_softc), 253}; 254 255static devclass_t agp_devclass; 256 257DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 258