1 /* $NetBSD: agp_sis.c,v 1.13 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_sis.c,v 1.3 2001/07/05 21:28:47 jhb Exp $ 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: agp_sis.c,v 1.13 2008/06/09 06:49:54 freza Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.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_sis_softc { 53 u_int32_t initial_aperture; /* aperture size at startup */ 54 struct agp_gatt *gatt; 55 }; 56 57 static u_int32_t agp_sis_get_aperture(struct agp_softc *); 58 static int agp_sis_set_aperture(struct agp_softc *, u_int32_t); 59 static int agp_sis_bind_page(struct agp_softc *, off_t, bus_addr_t); 60 static int agp_sis_unbind_page(struct agp_softc *, off_t); 61 static void agp_sis_flush_tlb(struct agp_softc *); 62 63 static struct agp_methods agp_sis_methods = { 64 agp_sis_get_aperture, 65 agp_sis_set_aperture, 66 agp_sis_bind_page, 67 agp_sis_unbind_page, 68 agp_sis_flush_tlb, 69 agp_generic_enable, 70 agp_generic_alloc_memory, 71 agp_generic_free_memory, 72 agp_generic_bind_memory, 73 agp_generic_unbind_memory, 74 }; 75 76 int 77 agp_sis_attach(device_t parent, device_t self, void *aux) 78 { 79 struct agp_softc *sc = device_private(self); 80 struct pci_attach_args *pa = aux; 81 struct agp_sis_softc *ssc; 82 struct agp_gatt *gatt; 83 pcireg_t reg; 84 85 ssc = malloc(sizeof *ssc, M_AGP, M_NOWAIT); 86 if (ssc == NULL) { 87 aprint_error(": can't allocate chipset-specific softc\n"); 88 return ENOMEM; 89 } 90 sc->as_methods = &agp_sis_methods; 91 sc->as_chipc = ssc; 92 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 93 NULL); 94 95 if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { 96 aprint_error(": can't map aperture\n"); 97 free(ssc, M_AGP); 98 return ENXIO; 99 } 100 101 ssc->initial_aperture = AGP_GET_APERTURE(sc); 102 103 for (;;) { 104 gatt = agp_alloc_gatt(sc); 105 if (gatt) 106 break; 107 108 /* 109 * Probably contigmalloc failure. Try reducing the 110 * aperture so that the gatt size reduces. 111 */ 112 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 113 agp_generic_detach(sc); 114 aprint_error(": failed to set aperture\n"); 115 return ENOMEM; 116 } 117 } 118 ssc->gatt = gatt; 119 120 /* Install the gatt. */ 121 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_ATTBASE, 122 gatt->ag_physical); 123 124 /* Enable the aperture and auto-tlb-inval */ 125 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 126 reg |= (0x05 << 24) | 3; 127 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 128 129 return 0; 130 } 131 132 #if 0 133 static int 134 agp_sis_detach(struct agp_softc *sc) 135 { 136 struct agp_sis_softc *ssc = sc->as_chipc; 137 pcireg_t reg; 138 int error; 139 140 error = agp_generic_detach(sc); 141 if (error) 142 return error; 143 144 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 145 reg &= ~3; 146 reg &= 0x00ffffff; 147 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 148 149 /* Put the aperture back the way it started. */ 150 AGP_SET_APERTURE(sc, ssc->initial_aperture); 151 152 agp_free_gatt(sc, ssc->gatt); 153 return 0; 154 } 155 #endif 156 157 static u_int32_t 158 agp_sis_get_aperture(struct agp_softc *sc) 159 { 160 int gws; 161 162 /* 163 * The aperture size is equal to 4M<<gws. 164 */ 165 gws = (pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL)&0x70) >> 4; 166 return (4*1024*1024) << gws; 167 } 168 169 static int 170 agp_sis_set_aperture(struct agp_softc *sc, u_int32_t aperture) 171 { 172 int gws; 173 pcireg_t reg; 174 175 /* 176 * Check for a power of two and make sure its within the 177 * programmable range. 178 */ 179 if (aperture & (aperture - 1) 180 || aperture < 4*1024*1024 181 || aperture > 256*1024*1024) 182 return EINVAL; 183 184 gws = ffs(aperture / 4*1024*1024) - 1; 185 186 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 187 reg &= ~0x00000070; 188 reg |= gws << 4; 189 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 190 191 return 0; 192 } 193 194 static int 195 agp_sis_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 196 { 197 struct agp_sis_softc *ssc = sc->as_chipc; 198 199 if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 200 return EINVAL; 201 202 ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 203 return 0; 204 } 205 206 static int 207 agp_sis_unbind_page(struct agp_softc *sc, off_t offset) 208 { 209 struct agp_sis_softc *ssc = sc->as_chipc; 210 211 if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 212 return EINVAL; 213 214 ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 215 return 0; 216 } 217 218 static void 219 agp_sis_flush_tlb(struct agp_softc *sc) 220 { 221 pcireg_t reg; 222 223 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH); 224 reg &= 0xffffff00; 225 reg |= 0x02; 226 pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH, reg); 227 } 228