agp_sis.c revision 1.2.2.2
1 1.2.2.2 nathanw /* $NetBSD: agp_sis.c,v 1.2.2.2 2001/09/21 22:35:53 nathanw Exp $ */ 2 1.2.2.2 nathanw 3 1.2.2.2 nathanw /*- 4 1.2.2.2 nathanw * Copyright (c) 2000 Doug Rabson 5 1.2.2.2 nathanw * All rights reserved. 6 1.2.2.2 nathanw * 7 1.2.2.2 nathanw * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 nathanw * modification, are permitted provided that the following conditions 9 1.2.2.2 nathanw * are met: 10 1.2.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 nathanw * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 nathanw * documentation and/or other materials provided with the distribution. 15 1.2.2.2 nathanw * 16 1.2.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.2.2.2 nathanw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.2.2.2 nathanw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.2.2.2 nathanw * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.2.2.2 nathanw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.2.2.2 nathanw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.2.2.2 nathanw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.2.2.2 nathanw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.2.2.2 nathanw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 nathanw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 nathanw * SUCH DAMAGE. 27 1.2.2.2 nathanw * 28 1.2.2.2 nathanw * $FreeBSD: src/sys/pci/agp_sis.c,v 1.3 2001/07/05 21:28:47 jhb Exp $ 29 1.2.2.2 nathanw */ 30 1.2.2.2 nathanw 31 1.2.2.2 nathanw #include <sys/param.h> 32 1.2.2.2 nathanw #include <sys/systm.h> 33 1.2.2.2 nathanw #include <sys/malloc.h> 34 1.2.2.2 nathanw #include <sys/kernel.h> 35 1.2.2.2 nathanw #include <sys/lock.h> 36 1.2.2.2 nathanw #include <sys/proc.h> 37 1.2.2.2 nathanw #include <sys/conf.h> 38 1.2.2.2 nathanw #include <sys/device.h> 39 1.2.2.2 nathanw #include <sys/agpio.h> 40 1.2.2.2 nathanw 41 1.2.2.2 nathanw #include <uvm/uvm_extern.h> 42 1.2.2.2 nathanw 43 1.2.2.2 nathanw #include <dev/pci/pcivar.h> 44 1.2.2.2 nathanw #include <dev/pci/pcireg.h> 45 1.2.2.2 nathanw #include <dev/pci/agpvar.h> 46 1.2.2.2 nathanw #include <dev/pci/agpreg.h> 47 1.2.2.2 nathanw 48 1.2.2.2 nathanw #include <machine/bus.h> 49 1.2.2.2 nathanw 50 1.2.2.2 nathanw struct agp_sis_softc { 51 1.2.2.2 nathanw u_int32_t initial_aperture; /* aperture size at startup */ 52 1.2.2.2 nathanw struct agp_gatt *gatt; 53 1.2.2.2 nathanw }; 54 1.2.2.2 nathanw 55 1.2.2.2 nathanw static u_int32_t agp_sis_get_aperture(struct agp_softc *); 56 1.2.2.2 nathanw static int agp_sis_set_aperture(struct agp_softc *, u_int32_t); 57 1.2.2.2 nathanw static int agp_sis_bind_page(struct agp_softc *, off_t, bus_addr_t); 58 1.2.2.2 nathanw static int agp_sis_unbind_page(struct agp_softc *, off_t); 59 1.2.2.2 nathanw static void agp_sis_flush_tlb(struct agp_softc *); 60 1.2.2.2 nathanw 61 1.2.2.2 nathanw struct agp_methods agp_sis_methods = { 62 1.2.2.2 nathanw agp_sis_get_aperture, 63 1.2.2.2 nathanw agp_sis_set_aperture, 64 1.2.2.2 nathanw agp_sis_bind_page, 65 1.2.2.2 nathanw agp_sis_unbind_page, 66 1.2.2.2 nathanw agp_sis_flush_tlb, 67 1.2.2.2 nathanw agp_generic_enable, 68 1.2.2.2 nathanw agp_generic_alloc_memory, 69 1.2.2.2 nathanw agp_generic_free_memory, 70 1.2.2.2 nathanw agp_generic_bind_memory, 71 1.2.2.2 nathanw agp_generic_unbind_memory, 72 1.2.2.2 nathanw }; 73 1.2.2.2 nathanw 74 1.2.2.2 nathanw int 75 1.2.2.2 nathanw agp_sis_attach(struct device *parent, struct device *self, void *aux) 76 1.2.2.2 nathanw { 77 1.2.2.2 nathanw struct agp_softc *sc = (struct agp_softc *)self; 78 1.2.2.2 nathanw struct pci_attach_args *pa = aux; 79 1.2.2.2 nathanw struct agp_sis_softc *ssc; 80 1.2.2.2 nathanw struct agp_gatt *gatt; 81 1.2.2.2 nathanw pcireg_t reg; 82 1.2.2.2 nathanw 83 1.2.2.2 nathanw ssc = malloc(sizeof *ssc, M_AGP, M_NOWAIT); 84 1.2.2.2 nathanw if (ssc == NULL) { 85 1.2.2.2 nathanw printf(": can't allocate chipset-specific softc\n"); 86 1.2.2.2 nathanw return ENOMEM; 87 1.2.2.2 nathanw } 88 1.2.2.2 nathanw sc->as_methods = &agp_sis_methods; 89 1.2.2.2 nathanw sc->as_chipc = ssc; 90 1.2.2.2 nathanw pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 91 1.2.2.2 nathanw NULL); 92 1.2.2.2 nathanw 93 1.2.2.2 nathanw if (agp_map_aperture(pa, sc) != 0) { 94 1.2.2.2 nathanw printf(": can't map aperture\n"); 95 1.2.2.2 nathanw free(ssc, M_AGP); 96 1.2.2.2 nathanw return ENXIO; 97 1.2.2.2 nathanw } 98 1.2.2.2 nathanw 99 1.2.2.2 nathanw ssc->initial_aperture = AGP_GET_APERTURE(sc); 100 1.2.2.2 nathanw 101 1.2.2.2 nathanw for (;;) { 102 1.2.2.2 nathanw gatt = agp_alloc_gatt(sc); 103 1.2.2.2 nathanw if (gatt) 104 1.2.2.2 nathanw break; 105 1.2.2.2 nathanw 106 1.2.2.2 nathanw /* 107 1.2.2.2 nathanw * Probably contigmalloc failure. Try reducing the 108 1.2.2.2 nathanw * aperture so that the gatt size reduces. 109 1.2.2.2 nathanw */ 110 1.2.2.2 nathanw if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 111 1.2.2.2 nathanw agp_generic_detach(sc); 112 1.2.2.2 nathanw printf(": failed to set aperture\n"); 113 1.2.2.2 nathanw return ENOMEM; 114 1.2.2.2 nathanw } 115 1.2.2.2 nathanw } 116 1.2.2.2 nathanw ssc->gatt = gatt; 117 1.2.2.2 nathanw 118 1.2.2.2 nathanw /* Install the gatt. */ 119 1.2.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_ATTBASE, 120 1.2.2.2 nathanw gatt->ag_physical); 121 1.2.2.2 nathanw 122 1.2.2.2 nathanw /* Enable the aperture and auto-tlb-inval */ 123 1.2.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 124 1.2.2.2 nathanw reg |= (0x05 << 24) | 3; 125 1.2.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 126 1.2.2.2 nathanw 127 1.2.2.2 nathanw return 0; 128 1.2.2.2 nathanw } 129 1.2.2.2 nathanw 130 1.2.2.2 nathanw #if 0 131 1.2.2.2 nathanw static int 132 1.2.2.2 nathanw agp_sis_detach(struct agp_softc *sc) 133 1.2.2.2 nathanw { 134 1.2.2.2 nathanw struct agp_sis_softc *ssc = sc->as_chipc; 135 1.2.2.2 nathanw pcireg_t reg; 136 1.2.2.2 nathanw int error; 137 1.2.2.2 nathanw 138 1.2.2.2 nathanw error = agp_generic_detach(sc); 139 1.2.2.2 nathanw if (error) 140 1.2.2.2 nathanw return error; 141 1.2.2.2 nathanw 142 1.2.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 143 1.2.2.2 nathanw reg &= ~3; 144 1.2.2.2 nathanw reg &= 0x00ffffff; 145 1.2.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 146 1.2.2.2 nathanw 147 1.2.2.2 nathanw /* Put the aperture back the way it started. */ 148 1.2.2.2 nathanw AGP_SET_APERTURE(sc, ssc->initial_aperture); 149 1.2.2.2 nathanw 150 1.2.2.2 nathanw agp_free_gatt(sc, ssc->gatt); 151 1.2.2.2 nathanw return 0; 152 1.2.2.2 nathanw } 153 1.2.2.2 nathanw #endif 154 1.2.2.2 nathanw 155 1.2.2.2 nathanw static u_int32_t 156 1.2.2.2 nathanw agp_sis_get_aperture(struct agp_softc *sc) 157 1.2.2.2 nathanw { 158 1.2.2.2 nathanw int gws; 159 1.2.2.2 nathanw 160 1.2.2.2 nathanw /* 161 1.2.2.2 nathanw * The aperture size is equal to 4M<<gws. 162 1.2.2.2 nathanw */ 163 1.2.2.2 nathanw gws = (pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL)&0x70) >> 4; 164 1.2.2.2 nathanw return (4*1024*1024) << gws; 165 1.2.2.2 nathanw } 166 1.2.2.2 nathanw 167 1.2.2.2 nathanw static int 168 1.2.2.2 nathanw agp_sis_set_aperture(struct agp_softc *sc, u_int32_t aperture) 169 1.2.2.2 nathanw { 170 1.2.2.2 nathanw int gws; 171 1.2.2.2 nathanw pcireg_t reg; 172 1.2.2.2 nathanw 173 1.2.2.2 nathanw /* 174 1.2.2.2 nathanw * Check for a power of two and make sure its within the 175 1.2.2.2 nathanw * programmable range. 176 1.2.2.2 nathanw */ 177 1.2.2.2 nathanw if (aperture & (aperture - 1) 178 1.2.2.2 nathanw || aperture < 4*1024*1024 179 1.2.2.2 nathanw || aperture > 256*1024*1024) 180 1.2.2.2 nathanw return EINVAL; 181 1.2.2.2 nathanw 182 1.2.2.2 nathanw gws = ffs(aperture / 4*1024*1024) - 1; 183 1.2.2.2 nathanw 184 1.2.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); 185 1.2.2.2 nathanw reg &= ~0x00000070; 186 1.2.2.2 nathanw reg |= gws << 4; 187 1.2.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); 188 1.2.2.2 nathanw 189 1.2.2.2 nathanw return 0; 190 1.2.2.2 nathanw } 191 1.2.2.2 nathanw 192 1.2.2.2 nathanw static int 193 1.2.2.2 nathanw agp_sis_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 194 1.2.2.2 nathanw { 195 1.2.2.2 nathanw struct agp_sis_softc *ssc = sc->as_chipc; 196 1.2.2.2 nathanw 197 1.2.2.2 nathanw if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 198 1.2.2.2 nathanw return EINVAL; 199 1.2.2.2 nathanw 200 1.2.2.2 nathanw ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 201 1.2.2.2 nathanw return 0; 202 1.2.2.2 nathanw } 203 1.2.2.2 nathanw 204 1.2.2.2 nathanw static int 205 1.2.2.2 nathanw agp_sis_unbind_page(struct agp_softc *sc, off_t offset) 206 1.2.2.2 nathanw { 207 1.2.2.2 nathanw struct agp_sis_softc *ssc = sc->as_chipc; 208 1.2.2.2 nathanw 209 1.2.2.2 nathanw if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) 210 1.2.2.2 nathanw return EINVAL; 211 1.2.2.2 nathanw 212 1.2.2.2 nathanw ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 213 1.2.2.2 nathanw return 0; 214 1.2.2.2 nathanw } 215 1.2.2.2 nathanw 216 1.2.2.2 nathanw static void 217 1.2.2.2 nathanw agp_sis_flush_tlb(struct agp_softc *sc) 218 1.2.2.2 nathanw { 219 1.2.2.2 nathanw pcireg_t reg; 220 1.2.2.2 nathanw 221 1.2.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH); 222 1.2.2.2 nathanw reg &= 0xffffff00; 223 1.2.2.2 nathanw reg |= 0x02; 224 1.2.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH, reg); 225 1.2.2.2 nathanw } 226
Indexes created Wed Oct 15 07:09:58 GMT 2025