agp_amd.c revision 1.3.2.2
1 1.3.2.2 nathanw /* $NetBSD: agp_amd.c,v 1.3.2.2 2001/09/21 22:35:52 nathanw Exp $ */ 2 1.3.2.2 nathanw 3 1.3.2.2 nathanw /*- 4 1.3.2.2 nathanw * Copyright (c) 2000 Doug Rabson 5 1.3.2.2 nathanw * All rights reserved. 6 1.3.2.2 nathanw * 7 1.3.2.2 nathanw * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 nathanw * modification, are permitted provided that the following conditions 9 1.3.2.2 nathanw * are met: 10 1.3.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 nathanw * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 nathanw * documentation and/or other materials provided with the distribution. 15 1.3.2.2 nathanw * 16 1.3.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.3.2.2 nathanw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.3.2.2 nathanw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.3.2.2 nathanw * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.3.2.2 nathanw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.3.2.2 nathanw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.3.2.2 nathanw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.3.2.2 nathanw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.3.2.2 nathanw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.3.2.2 nathanw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.3.2.2 nathanw * SUCH DAMAGE. 27 1.3.2.2 nathanw * 28 1.3.2.2 nathanw * $FreeBSD: src/sys/pci/agp_amd.c,v 1.6 2001/07/05 21:28:46 jhb Exp $ 29 1.3.2.2 nathanw */ 30 1.3.2.2 nathanw 31 1.3.2.2 nathanw #include <sys/param.h> 32 1.3.2.2 nathanw #include <sys/systm.h> 33 1.3.2.2 nathanw #include <sys/malloc.h> 34 1.3.2.2 nathanw #include <sys/kernel.h> 35 1.3.2.2 nathanw #include <sys/lock.h> 36 1.3.2.2 nathanw #include <sys/proc.h> 37 1.3.2.2 nathanw #include <sys/conf.h> 38 1.3.2.2 nathanw #include <sys/device.h> 39 1.3.2.2 nathanw #include <sys/agpio.h> 40 1.3.2.2 nathanw 41 1.3.2.2 nathanw #include <uvm/uvm_extern.h> 42 1.3.2.2 nathanw 43 1.3.2.2 nathanw #include <dev/pci/pcivar.h> 44 1.3.2.2 nathanw #include <dev/pci/pcireg.h> 45 1.3.2.2 nathanw #include <dev/pci/agpvar.h> 46 1.3.2.2 nathanw #include <dev/pci/agpreg.h> 47 1.3.2.2 nathanw 48 1.3.2.2 nathanw #include <dev/pci/pcidevs.h> 49 1.3.2.2 nathanw 50 1.3.2.2 nathanw #define READ2(off) bus_space_read_2(asc->iot, asc->ioh, off) 51 1.3.2.2 nathanw #define READ4(off) bus_space_read_4(asc->iot, asc->ioh, off) 52 1.3.2.2 nathanw #define WRITE2(off,v) bus_space_write_2(asc->iot, asc->ioh, off, v) 53 1.3.2.2 nathanw #define WRITE4(off,v) bus_space_write_4(asc->iot, asc->ioh, off, v) 54 1.3.2.2 nathanw 55 1.3.2.2 nathanw struct agp_amd_gatt { 56 1.3.2.2 nathanw bus_dmamap_t ag_dmamap; 57 1.3.2.2 nathanw bus_dma_segment_t ag_dmaseg; 58 1.3.2.2 nathanw int ag_nseg; 59 1.3.2.2 nathanw u_int32_t ag_entries; 60 1.3.2.2 nathanw u_int32_t *ag_vdir; /* virtual address of page dir */ 61 1.3.2.2 nathanw bus_addr_t ag_pdir; /* bus address of page dir */ 62 1.3.2.2 nathanw u_int32_t *ag_virtual; /* virtual address of gatt */ 63 1.3.2.2 nathanw bus_addr_t ag_physical; /* bus address of gatt */ 64 1.3.2.2 nathanw size_t ag_size; 65 1.3.2.2 nathanw }; 66 1.3.2.2 nathanw 67 1.3.2.2 nathanw struct agp_amd_softc { 68 1.3.2.2 nathanw u_int32_t initial_aperture; /* aperture size at startup */ 69 1.3.2.2 nathanw struct agp_amd_gatt *gatt; 70 1.3.2.2 nathanw bus_space_handle_t ioh; 71 1.3.2.2 nathanw bus_space_tag_t iot; 72 1.3.2.2 nathanw }; 73 1.3.2.2 nathanw 74 1.3.2.2 nathanw static u_int32_t agp_amd_get_aperture(struct agp_softc *); 75 1.3.2.2 nathanw static int agp_amd_set_aperture(struct agp_softc *, u_int32_t); 76 1.3.2.2 nathanw static int agp_amd_bind_page(struct agp_softc *, off_t, bus_addr_t); 77 1.3.2.2 nathanw static int agp_amd_unbind_page(struct agp_softc *, off_t); 78 1.3.2.2 nathanw static void agp_amd_flush_tlb(struct agp_softc *); 79 1.3.2.2 nathanw 80 1.3.2.2 nathanw 81 1.3.2.2 nathanw struct agp_methods agp_amd_methods = { 82 1.3.2.2 nathanw agp_amd_get_aperture, 83 1.3.2.2 nathanw agp_amd_set_aperture, 84 1.3.2.2 nathanw agp_amd_bind_page, 85 1.3.2.2 nathanw agp_amd_unbind_page, 86 1.3.2.2 nathanw agp_amd_flush_tlb, 87 1.3.2.2 nathanw agp_generic_enable, 88 1.3.2.2 nathanw agp_generic_alloc_memory, 89 1.3.2.2 nathanw agp_generic_free_memory, 90 1.3.2.2 nathanw agp_generic_bind_memory, 91 1.3.2.2 nathanw agp_generic_unbind_memory, 92 1.3.2.2 nathanw }; 93 1.3.2.2 nathanw 94 1.3.2.2 nathanw 95 1.3.2.2 nathanw static struct agp_amd_gatt * 96 1.3.2.2 nathanw agp_amd_alloc_gatt(struct agp_softc *sc) 97 1.3.2.2 nathanw { 98 1.3.2.2 nathanw u_int32_t apsize = AGP_GET_APERTURE(sc); 99 1.3.2.2 nathanw u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 100 1.3.2.2 nathanw struct agp_amd_gatt *gatt; 101 1.3.2.2 nathanw int i, npages; 102 1.3.2.2 nathanw 103 1.3.2.2 nathanw gatt = malloc(sizeof(struct agp_amd_gatt), M_AGP, M_NOWAIT); 104 1.3.2.2 nathanw if (!gatt) 105 1.3.2.2 nathanw return 0; 106 1.3.2.2 nathanw 107 1.3.2.2 nathanw if (agp_alloc_dmamem(sc->as_dmat, 108 1.3.2.2 nathanw AGP_PAGE_SIZE + entries * sizeof(u_int32_t), 0, 109 1.3.2.2 nathanw &gatt->ag_dmamap, (caddr_t *)&gatt->ag_vdir, &gatt->ag_pdir, 110 1.3.2.2 nathanw &gatt->ag_dmaseg, 1, &gatt->ag_nseg) != 0) { 111 1.3.2.2 nathanw printf("failed to allocate GATT\n"); 112 1.3.2.2 nathanw return NULL; 113 1.3.2.2 nathanw } 114 1.3.2.2 nathanw 115 1.3.2.2 nathanw gatt->ag_entries = entries; 116 1.3.2.2 nathanw gatt->ag_virtual = gatt->ag_vdir + AGP_PAGE_SIZE; 117 1.3.2.2 nathanw gatt->ag_physical = gatt->ag_pdir + AGP_PAGE_SIZE; 118 1.3.2.2 nathanw gatt->ag_size = AGP_PAGE_SIZE + entries * sizeof(u_int32_t); 119 1.3.2.2 nathanw 120 1.3.2.2 nathanw memset(gatt->ag_vdir, 0, AGP_PAGE_SIZE); 121 1.3.2.2 nathanw memset(gatt->ag_virtual, 0, entries * sizeof(u_int32_t)); 122 1.3.2.2 nathanw 123 1.3.2.2 nathanw /* 124 1.3.2.2 nathanw * Map the pages of the GATT into the page directory. 125 1.3.2.2 nathanw */ 126 1.3.2.2 nathanw npages = ((entries * sizeof(u_int32_t) + AGP_PAGE_SIZE - 1) 127 1.3.2.2 nathanw >> AGP_PAGE_SHIFT); 128 1.3.2.2 nathanw 129 1.3.2.2 nathanw for (i = 0; i < npages; i++) 130 1.3.2.2 nathanw gatt->ag_vdir[i] = (gatt->ag_physical + i * AGP_PAGE_SIZE) | 1; 131 1.3.2.2 nathanw 132 1.3.2.2 nathanw /* 133 1.3.2.2 nathanw * Make sure the chipset can see everything. 134 1.3.2.2 nathanw */ 135 1.3.2.2 nathanw agp_flush_cache(); 136 1.3.2.2 nathanw 137 1.3.2.2 nathanw return gatt; 138 1.3.2.2 nathanw } 139 1.3.2.2 nathanw 140 1.3.2.2 nathanw #if 0 141 1.3.2.2 nathanw static void 142 1.3.2.2 nathanw agp_amd_free_gatt(struct agp_softc *sc, struct agp_amd_gatt *gatt) 143 1.3.2.2 nathanw { 144 1.3.2.2 nathanw agp_free_dmamem(sc->as_dmat, gatt->ag_size, 145 1.3.2.2 nathanw gatt->ag_dmamap, (caddr_t)gatt->ag_virtual, &gatt->ag_dmaseg, 146 1.3.2.2 nathanw gatt->ag_nseg); 147 1.3.2.2 nathanw free(gatt, M_AGP); 148 1.3.2.2 nathanw } 149 1.3.2.2 nathanw #endif 150 1.3.2.2 nathanw 151 1.3.2.2 nathanw int 152 1.3.2.2 nathanw agp_amd_match(const struct pci_attach_args *pa) 153 1.3.2.2 nathanw { 154 1.3.2.2 nathanw 155 1.3.2.2 nathanw switch (PCI_PRODUCT(pa->pa_id)) { 156 1.3.2.2 nathanw case PCI_PRODUCT_AMD_SC751_SC: 157 1.3.2.2 nathanw return 1; 158 1.3.2.2 nathanw } 159 1.3.2.2 nathanw 160 1.3.2.2 nathanw return 0; 161 1.3.2.2 nathanw } 162 1.3.2.2 nathanw 163 1.3.2.2 nathanw int 164 1.3.2.2 nathanw agp_amd_attach(struct device *parent, struct device *self, void *aux) 165 1.3.2.2 nathanw { 166 1.3.2.2 nathanw struct agp_softc *sc = (void *)self; 167 1.3.2.2 nathanw struct agp_amd_softc *asc; 168 1.3.2.2 nathanw struct pci_attach_args *pa = aux; 169 1.3.2.2 nathanw struct agp_amd_gatt *gatt; 170 1.3.2.2 nathanw pcireg_t reg; 171 1.3.2.2 nathanw int error; 172 1.3.2.2 nathanw 173 1.3.2.2 nathanw asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); 174 1.3.2.2 nathanw if (asc == NULL) { 175 1.3.2.2 nathanw printf(": can't allocate softc\n"); 176 1.3.2.2 nathanw /* agp_generic_detach(sc) */ 177 1.3.2.2 nathanw return ENOMEM; 178 1.3.2.2 nathanw } 179 1.3.2.2 nathanw memset(asc, 0, sizeof *asc); 180 1.3.2.2 nathanw 181 1.3.2.2 nathanw error = pci_mapreg_map(pa, AGP_AMD751_REGISTERS, PCI_MAPREG_TYPE_MEM, 0, 182 1.3.2.2 nathanw &asc->iot, &asc->ioh, NULL, NULL); 183 1.3.2.2 nathanw if (error != 0) { 184 1.3.2.2 nathanw printf(": can't map AGP registers\n"); 185 1.3.2.2 nathanw agp_generic_detach(sc); 186 1.3.2.2 nathanw return error; 187 1.3.2.2 nathanw } 188 1.3.2.2 nathanw 189 1.3.2.2 nathanw if (agp_map_aperture(pa, sc) != 0) { 190 1.3.2.2 nathanw printf(": can't map aperture\n"); 191 1.3.2.2 nathanw agp_generic_detach(sc); 192 1.3.2.2 nathanw free(asc, M_AGP); 193 1.3.2.2 nathanw return ENXIO; 194 1.3.2.2 nathanw } 195 1.3.2.2 nathanw pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 196 1.3.2.2 nathanw NULL); 197 1.3.2.2 nathanw sc->as_methods = &agp_amd_methods; 198 1.3.2.2 nathanw sc->as_chipc = asc; 199 1.3.2.2 nathanw asc->initial_aperture = AGP_GET_APERTURE(sc); 200 1.3.2.2 nathanw 201 1.3.2.2 nathanw for (;;) { 202 1.3.2.2 nathanw gatt = agp_amd_alloc_gatt(sc); 203 1.3.2.2 nathanw if (gatt) 204 1.3.2.2 nathanw break; 205 1.3.2.2 nathanw 206 1.3.2.2 nathanw /* 207 1.3.2.2 nathanw * Probably contigmalloc failure. Try reducing the 208 1.3.2.2 nathanw * aperture so that the gatt size reduces. 209 1.3.2.2 nathanw */ 210 1.3.2.2 nathanw if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 211 1.3.2.2 nathanw printf(": can't set aperture\n"); 212 1.3.2.2 nathanw return ENOMEM; 213 1.3.2.2 nathanw } 214 1.3.2.2 nathanw } 215 1.3.2.2 nathanw asc->gatt = gatt; 216 1.3.2.2 nathanw 217 1.3.2.2 nathanw /* Install the gatt. */ 218 1.3.2.2 nathanw WRITE4(AGP_AMD751_ATTBASE, gatt->ag_physical); 219 1.3.2.2 nathanw 220 1.3.2.2 nathanw /* Enable synchronisation between host and agp. */ 221 1.3.2.2 nathanw reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_AMD751_MODECTRL); 222 1.3.2.2 nathanw reg &= ~0x00ff00ff; 223 1.3.2.2 nathanw reg |= (AGP_AMD751_MODECTRL_SYNEN) | (AGP_AMD751_MODECTRL2_GPDCE << 16); 224 1.3.2.2 nathanw pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_AMD751_MODECTRL, reg); 225 1.3.2.2 nathanw /* Enable the TLB and flush */ 226 1.3.2.2 nathanw WRITE2(AGP_AMD751_STATUS, 227 1.3.2.2 nathanw READ2(AGP_AMD751_STATUS) | AGP_AMD751_STATUS_GCE); 228 1.3.2.2 nathanw AGP_FLUSH_TLB(sc); 229 1.3.2.2 nathanw 230 1.3.2.2 nathanw return 0; 231 1.3.2.2 nathanw } 232 1.3.2.2 nathanw 233 1.3.2.2 nathanw #if 0 234 1.3.2.2 nathanw static int 235 1.3.2.2 nathanw agp_amd_detach(struct agp_softc *sc) 236 1.3.2.2 nathanw { 237 1.3.2.2 nathanw pcireg_t reg; 238 1.3.2.2 nathanw struct agp_amd_softc *asc = sc->as_chipc; 239 1.3.2.2 nathanw 240 1.3.2.2 nathanw /* Disable the TLB.. */ 241 1.3.2.2 nathanw WRITE2(AGP_AMD751_STATUS, 242 1.3.2.2 nathanw READ2(AGP_AMD751_STATUS) & ~AGP_AMD751_STATUS_GCE); 243 1.3.2.2 nathanw 244 1.3.2.2 nathanw /* Disable host-agp sync */ 245 1.3.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_AMD751_MODECTRL); 246 1.3.2.2 nathanw reg &= 0xffffff00; 247 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_AMD751_MODECTRL, reg); 248 1.3.2.2 nathanw 249 1.3.2.2 nathanw /* Clear the GATT base */ 250 1.3.2.2 nathanw WRITE4(AGP_AMD751_ATTBASE, 0); 251 1.3.2.2 nathanw 252 1.3.2.2 nathanw /* Put the aperture back the way it started. */ 253 1.3.2.2 nathanw AGP_SET_APERTURE(sc, asc->initial_aperture); 254 1.3.2.2 nathanw 255 1.3.2.2 nathanw agp_amd_free_gatt(sc, asc->gatt); 256 1.3.2.2 nathanw 257 1.3.2.2 nathanw /* XXXfvdl no pci_mapreg_unmap */ 258 1.3.2.2 nathanw 259 1.3.2.2 nathanw return 0; 260 1.3.2.2 nathanw } 261 1.3.2.2 nathanw #endif 262 1.3.2.2 nathanw 263 1.3.2.2 nathanw static u_int32_t 264 1.3.2.2 nathanw agp_amd_get_aperture(struct agp_softc *sc) 265 1.3.2.2 nathanw { 266 1.3.2.2 nathanw int vas; 267 1.3.2.2 nathanw 268 1.3.2.2 nathanw vas = (pci_conf_read(sc->as_pc, sc->as_tag, AGP_AMD751_APCTRL) & 0x06); 269 1.3.2.2 nathanw vas >>= 1; 270 1.3.2.2 nathanw /* 271 1.3.2.2 nathanw * The aperture size is equal to 32M<<vas. 272 1.3.2.2 nathanw */ 273 1.3.2.2 nathanw return (32*1024*1024) << vas; 274 1.3.2.2 nathanw } 275 1.3.2.2 nathanw 276 1.3.2.2 nathanw static int 277 1.3.2.2 nathanw agp_amd_set_aperture(struct agp_softc *sc, u_int32_t aperture) 278 1.3.2.2 nathanw { 279 1.3.2.2 nathanw int vas; 280 1.3.2.2 nathanw pcireg_t reg; 281 1.3.2.2 nathanw 282 1.3.2.2 nathanw /* 283 1.3.2.2 nathanw * Check for a power of two and make sure its within the 284 1.3.2.2 nathanw * programmable range. 285 1.3.2.2 nathanw */ 286 1.3.2.2 nathanw if (aperture & (aperture - 1) 287 1.3.2.2 nathanw || aperture < 32*1024*1024 288 1.3.2.2 nathanw || aperture > 2U*1024*1024*1024) 289 1.3.2.2 nathanw return EINVAL; 290 1.3.2.2 nathanw 291 1.3.2.2 nathanw vas = ffs(aperture / 32*1024*1024) - 1; 292 1.3.2.2 nathanw 293 1.3.2.2 nathanw reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_AMD751_APCTRL); 294 1.3.2.2 nathanw reg = (reg & ~0x06) | (vas << 1); 295 1.3.2.2 nathanw pci_conf_write(sc->as_pc, sc->as_tag, AGP_AMD751_APCTRL, reg); 296 1.3.2.2 nathanw 297 1.3.2.2 nathanw return 0; 298 1.3.2.2 nathanw } 299 1.3.2.2 nathanw 300 1.3.2.2 nathanw static int 301 1.3.2.2 nathanw agp_amd_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 302 1.3.2.2 nathanw { 303 1.3.2.2 nathanw struct agp_amd_softc *asc = sc->as_chipc; 304 1.3.2.2 nathanw 305 1.3.2.2 nathanw if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 306 1.3.2.2 nathanw return EINVAL; 307 1.3.2.2 nathanw 308 1.3.2.2 nathanw asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1; 309 1.3.2.2 nathanw return 0; 310 1.3.2.2 nathanw } 311 1.3.2.2 nathanw 312 1.3.2.2 nathanw static int 313 1.3.2.2 nathanw agp_amd_unbind_page(struct agp_softc *sc, off_t offset) 314 1.3.2.2 nathanw { 315 1.3.2.2 nathanw struct agp_amd_softc *asc = sc->as_chipc; 316 1.3.2.2 nathanw 317 1.3.2.2 nathanw if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 318 1.3.2.2 nathanw return EINVAL; 319 1.3.2.2 nathanw 320 1.3.2.2 nathanw asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 321 1.3.2.2 nathanw return 0; 322 1.3.2.2 nathanw } 323 1.3.2.2 nathanw 324 1.3.2.2 nathanw static void 325 1.3.2.2 nathanw agp_amd_flush_tlb(struct agp_softc *sc) 326 1.3.2.2 nathanw { 327 1.3.2.2 nathanw struct agp_amd_softc *asc = sc->as_chipc; 328 1.3.2.2 nathanw 329 1.3.2.2 nathanw /* Set the cache invalidate bit and wait for the chipset to clear */ 330 1.3.2.2 nathanw WRITE4(AGP_AMD751_TLBCTRL, 1); 331 1.3.2.2 nathanw do { 332 1.3.2.2 nathanw DELAY(1); 333 1.3.2.2 nathanw } while (READ4(AGP_AMD751_TLBCTRL)); 334 1.3.2.2 nathanw } 335
Indexes created Sat Oct 11 19:10:01 GMT 2025