| 1 | /* $NetBSD: agp_sis.c,v 1.14 2010/11/13 13:52:05 uebayasi 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 1.14 2010/11/13 13:52:05 uebayasi 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 <dev/pci/pcivar.h> |
| 44 | #include <dev/pci/pcireg.h> |
| 45 | #include <dev/pci/agpvar.h> |
| 46 | #include <dev/pci/agpreg.h> |
| 47 | |
| 48 | #include <sys/bus.h> |
| 49 | |
| 50 | struct agp_sis_softc { |
| 51 | u_int32_t initial_aperture; /* aperture size at startup */ |
| 52 | struct agp_gatt *gatt; |
| 53 | }; |
| 54 | |
| 55 | static u_int32_t agp_sis_get_aperture(struct agp_softc *); |
| 56 | static int agp_sis_set_aperture(struct agp_softc *, u_int32_t); |
| 57 | static int agp_sis_bind_page(struct agp_softc *, off_t, bus_addr_t); |
| 58 | static int agp_sis_unbind_page(struct agp_softc *, off_t); |
| 59 | static void agp_sis_flush_tlb(struct agp_softc *); |
| 60 | |
| 61 | static struct agp_methods agp_sis_methods = { |
| 62 | agp_sis_get_aperture, |
| 63 | agp_sis_set_aperture, |
| 64 | agp_sis_bind_page, |
| 65 | agp_sis_unbind_page, |
| 66 | agp_sis_flush_tlb, |
| 67 | agp_generic_enable, |
| 68 | agp_generic_alloc_memory, |
| 69 | agp_generic_free_memory, |
| 70 | agp_generic_bind_memory, |
| 71 | agp_generic_unbind_memory, |
| 72 | }; |
| 73 | |
| 74 | int |
| 75 | agp_sis_attach(device_t parent, device_t self, void *aux) |
| 76 | { |
| 77 | struct agp_softc *sc = device_private(self); |
| 78 | struct pci_attach_args *pa = aux; |
| 79 | struct agp_sis_softc *ssc; |
| 80 | struct agp_gatt *gatt; |
| 81 | pcireg_t reg; |
| 82 | |
| 83 | ssc = malloc(sizeof *ssc, M_AGP, M_NOWAIT); |
| 84 | if (ssc == NULL) { |
| 85 | aprint_error(": can't allocate chipset-specific softc\n" ); |
| 86 | return ENOMEM; |
| 87 | } |
| 88 | sc->as_methods = &agp_sis_methods; |
| 89 | sc->as_chipc = ssc; |
| 90 | pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, |
| 91 | NULL); |
| 92 | |
| 93 | if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { |
| 94 | aprint_error(": can't map aperture\n" ); |
| 95 | free(ssc, M_AGP); |
| 96 | return ENXIO; |
| 97 | } |
| 98 | |
| 99 | ssc->initial_aperture = AGP_GET_APERTURE(sc); |
| 100 | |
| 101 | for (;;) { |
| 102 | gatt = agp_alloc_gatt(sc); |
| 103 | if (gatt) |
| 104 | break; |
| 105 | |
| 106 | /* |
| 107 | * Probably contigmalloc failure. Try reducing the |
| 108 | * aperture so that the gatt size reduces. |
| 109 | */ |
| 110 | if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { |
| 111 | agp_generic_detach(sc); |
| 112 | aprint_error(": failed to set aperture\n" ); |
| 113 | return ENOMEM; |
| 114 | } |
| 115 | } |
| 116 | ssc->gatt = gatt; |
| 117 | |
| 118 | /* Install the gatt. */ |
| 119 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_ATTBASE, |
| 120 | gatt->ag_physical); |
| 121 | |
| 122 | /* Enable the aperture and auto-tlb-inval */ |
| 123 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); |
| 124 | reg |= (0x05 << 24) | 3; |
| 125 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); |
| 126 | |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | #if 0 |
| 131 | static int |
| 132 | agp_sis_detach(struct agp_softc *sc) |
| 133 | { |
| 134 | struct agp_sis_softc *ssc = sc->as_chipc; |
| 135 | pcireg_t reg; |
| 136 | int error; |
| 137 | |
| 138 | error = agp_generic_detach(sc); |
| 139 | if (error) |
| 140 | return error; |
| 141 | |
| 142 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); |
| 143 | reg &= ~3; |
| 144 | reg &= 0x00ffffff; |
| 145 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); |
| 146 | |
| 147 | /* Put the aperture back the way it started. */ |
| 148 | AGP_SET_APERTURE(sc, ssc->initial_aperture); |
| 149 | |
| 150 | agp_free_gatt(sc, ssc->gatt); |
| 151 | return 0; |
| 152 | } |
| 153 | #endif |
| 154 | |
| 155 | static u_int32_t |
| 156 | agp_sis_get_aperture(struct agp_softc *sc) |
| 157 | { |
| 158 | int gws; |
| 159 | |
| 160 | /* |
| 161 | * The aperture size is equal to 4M<<gws. |
| 162 | */ |
| 163 | gws = (pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL)&0x70) >> 4; |
| 164 | return (4*1024*1024) << gws; |
| 165 | } |
| 166 | |
| 167 | static int |
| 168 | agp_sis_set_aperture(struct agp_softc *sc, u_int32_t aperture) |
| 169 | { |
| 170 | int gws; |
| 171 | pcireg_t reg; |
| 172 | |
| 173 | /* |
| 174 | * Check for a power of two and make sure its within the |
| 175 | * programmable range. |
| 176 | */ |
| 177 | if (aperture & (aperture - 1) |
| 178 | || aperture < 4*1024*1024 |
| 179 | || aperture > 256*1024*1024) |
| 180 | return EINVAL; |
| 181 | |
| 182 | gws = ffs(aperture / 4*1024*1024) - 1; |
| 183 | |
| 184 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); |
| 185 | reg &= ~0x00000070; |
| 186 | reg |= gws << 4; |
| 187 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); |
| 188 | |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | static int |
| 193 | agp_sis_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) |
| 194 | { |
| 195 | struct agp_sis_softc *ssc = sc->as_chipc; |
| 196 | |
| 197 | if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
| 198 | return EINVAL; |
| 199 | |
| 200 | ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | static int |
| 205 | agp_sis_unbind_page(struct agp_softc *sc, off_t offset) |
| 206 | { |
| 207 | struct agp_sis_softc *ssc = sc->as_chipc; |
| 208 | |
| 209 | if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
| 210 | return EINVAL; |
| 211 | |
| 212 | ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | static void |
| 217 | agp_sis_flush_tlb(struct agp_softc *sc) |
| 218 | { |
| 219 | pcireg_t reg; |
| 220 | |
| 221 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH); |
| 222 | reg &= 0xffffff00; |
| 223 | reg |= 0x02; |
| 224 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH, reg); |
| 225 | } |
| 226 | |