1 /* $OpenBSD: agp_ali.c,v 1.7 2008/11/09 22:47:54 oga Exp $ */ 2 /* $NetBSD: agp_ali.c,v 1.2 2001/09/15 00:25:00 thorpej Exp $ */ 3 4 5 /*- 6 * Copyright (c) 2000 Doug Rabson 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD: src/sys/pci/agp_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/malloc.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/lock.h> 41 #include <sys/agpio.h> 42 43 #include <dev/pci/pcivar.h> 44 #include <dev/pci/pcireg.h> 45 #include <dev/pci/pcidevs.h> 46 #include <dev/pci/vga_pcivar.h> 47 #include <dev/pci/agpvar.h> 48 #include <dev/pci/agpreg.h> 49 50 #include <machine/bus.h> 51 52 struct agp_ali_softc { 53 struct device dev; 54 struct agp_softc *agpdev; 55 struct agp_gatt *gatt; 56 pci_chipset_tag_t asc_pc; 57 pcitag_t asc_tag; 58 bus_size_t initial_aperture; 59 }; 60 61 void agp_ali_attach(struct device *, struct device *, void *); 62 int agp_ali_probe(struct device *, void *, void *); 63 bus_size_t agp_ali_get_aperture(void *); 64 int agp_ali_set_aperture(void *sc, bus_size_t); 65 int agp_ali_bind_page(void *, off_t, bus_addr_t); 66 int agp_ali_unbind_page(void *, off_t); 67 void agp_ali_flush_tlb(void *); 68 69 struct cfattach aliagp_ca = { 70 sizeof(struct agp_ali_softc), agp_ali_probe, agp_ali_attach 71 }; 72 73 struct cfdriver aliagp_cd = { 74 NULL, "aliagp", DV_DULL 75 }; 76 77 const struct agp_methods agp_ali_methods = { 78 agp_ali_get_aperture, 79 agp_ali_bind_page, 80 agp_ali_unbind_page, 81 agp_ali_flush_tlb, 82 }; 83 84 int 85 agp_ali_probe(struct device *parent, void *match, void *aux) 86 { 87 struct agp_attach_args *aa = aux; 88 struct pci_attach_args *pa = aa->aa_pa; 89 90 /* Must be a pchb, don't attach to iommu-style agp devs */ 91 if (agpbus_probe(aa) == 1 && PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ALI && 92 PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_ALI_M1689) 93 return (1); 94 return (0); 95 } 96 97 void 98 agp_ali_attach(struct device *parent, struct device *self, void *aux) 99 { 100 struct agp_ali_softc *asc = (struct agp_ali_softc *)self; 101 struct agp_gatt *gatt; 102 struct agp_attach_args *aa = aux; 103 struct pci_attach_args *pa = aa->aa_pa; 104 pcireg_t reg; 105 106 asc->asc_tag = pa->pa_tag; 107 asc->asc_pc = pa->pa_pc; 108 asc->initial_aperture = agp_ali_get_aperture(asc); 109 110 for (;;) { 111 bus_size_t size = agp_ali_get_aperture(asc); 112 gatt = agp_alloc_gatt(pa->pa_dmat, size); 113 if (gatt != NULL) 114 break; 115 /* 116 * almost certainly error allocating contigious dma memory 117 * so reduce aperture so that the gatt size reduces. 118 */ 119 if (agp_ali_set_aperture(asc, size / 2)) { 120 printf("failed to set aperture\n"); 121 return; 122 } 123 } 124 asc->gatt = gatt; 125 126 /* Install the gatt. */ 127 reg = pci_conf_read(asc->asc_pc, asc->asc_tag, AGP_ALI_ATTBASE); 128 reg = (reg & 0xff) | gatt->ag_physical; 129 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_ATTBASE, reg); 130 131 /* Enable the TLB. */ 132 reg = pci_conf_read(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL); 133 reg = (reg & ~0xff) | 0x10; 134 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL, reg); 135 136 asc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_ali_methods, 137 AGP_APBASE, PCI_MAPREG_TYPE_MEM, &asc->dev); 138 return; 139 } 140 141 #if 0 142 int 143 agp_ali_detach(struct agp_softc *sc) 144 { 145 int error; 146 pcireg_t reg; 147 struct agp_ali_softc *asc = sc->sc_chipc; 148 149 error = agp_generic_detach(sc); 150 if (error) 151 return (error); 152 153 /* Disable the TLB.. */ 154 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL); 155 reg &= ~0xff; 156 reg |= 0x90; 157 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); 158 159 /* Put the aperture back the way it started. */ 160 AGP_SET_APERTURE(sc, asc->initial_aperture); 161 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE); 162 reg &= 0xff; 163 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg); 164 165 agp_free_gatt(sc, asc->gatt); 166 return (0); 167 } 168 #endif 169 170 #define M 1024*1024 171 172 static const u_int32_t agp_ali_table[] = { 173 0, /* 0 - invalid */ 174 1, /* 1 - invalid */ 175 2, /* 2 - invalid */ 176 4*M, /* 3 - invalid */ 177 8*M, /* 4 - invalid */ 178 0, /* 5 - invalid */ 179 16*M, /* 6 - invalid */ 180 32*M, /* 7 - invalid */ 181 64*M, /* 8 - invalid */ 182 128*M, /* 9 - invalid */ 183 256*M, /* 10 - invalid */ 184 }; 185 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 186 187 bus_size_t 188 agp_ali_get_aperture(void *sc) 189 { 190 struct agp_ali_softc *asc = sc; 191 int i; 192 193 /* 194 * The aperture size is derived from the low bits of attbase. 195 * I'm not sure this is correct.. 196 */ 197 i = (int)pci_conf_read(asc->asc_pc, asc->asc_tag, 198 AGP_ALI_ATTBASE) & 0xff; 199 if (i >= agp_ali_table_size) 200 return (0); 201 return (agp_ali_table[i]); 202 } 203 204 int 205 agp_ali_set_aperture(void *sc, bus_size_t aperture) 206 { 207 struct agp_ali_softc *asc = sc; 208 int i; 209 pcireg_t reg; 210 211 for (i = 0; i < agp_ali_table_size; i++) 212 if (agp_ali_table[i] == aperture) 213 break; 214 if (i == agp_ali_table_size) 215 return (EINVAL); 216 217 reg = pci_conf_read(asc->asc_pc, asc->asc_tag, AGP_ALI_ATTBASE); 218 reg &= ~0xff; 219 reg |= i; 220 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_ATTBASE, reg); 221 return (0); 222 } 223 224 int 225 agp_ali_bind_page(void *sc, off_t offset, bus_addr_t physical) 226 { 227 struct agp_ali_softc *asc = sc; 228 229 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 230 return (EINVAL); 231 232 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 233 return (0); 234 } 235 236 int 237 agp_ali_unbind_page(void *sc, off_t offset) 238 { 239 struct agp_ali_softc *asc = sc; 240 241 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 242 return (EINVAL); 243 244 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 245 return (0); 246 } 247 248 void 249 agp_ali_flush_tlb(void *sc) 250 { 251 struct agp_ali_softc *asc = sc; 252 pcireg_t reg; 253 254 reg = pci_conf_read(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL); 255 reg &= ~0xff; 256 reg |= 0x90; 257 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL, reg); 258 reg &= ~0xff; 259 reg |= 0x10; 260 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_ALI_TLBCTRL, reg); 261 } 262 263