lca_dma.c revision 1.1.2.1
1 /* $NetBSD: lca_dma.c,v 1.1.2.1 1997/05/23 21:44:48 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #include <machine/options.h> /* Config options headers */ 41 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 42 43 __KERNEL_RCSID(0, "$NetBSD: lca_dma.c,v 1.1.2.1 1997/05/23 21:44:48 thorpej Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/device.h> 49 #include <sys/malloc.h> 50 #include <vm/vm.h> 51 52 #define _ALPHA_BUS_DMA_PRIVATE 53 #include <machine/bus.h> 54 55 #include <dev/pci/pcireg.h> 56 #include <dev/pci/pcivar.h> 57 #include <alpha/pci/lcareg.h> 58 #include <alpha/pci/lcavar.h> 59 60 bus_dma_tag_t lca_dma_get_tag __P((bus_dma_tag_t, alpha_bus_t)); 61 62 int lca_bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, 63 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 64 int lca_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, 65 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 66 67 void lca_bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t)); 68 69 int lca_bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t, void *, 70 bus_size_t, struct proc *, int)); 71 int lca_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 72 bus_size_t, struct proc *, int)); 73 74 int lca_bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t, bus_dmamap_t, 75 struct mbuf *, int)); 76 int lca_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 77 struct mbuf *, int)); 78 79 int lca_bus_dmamap_load_uio_direct __P((bus_dma_tag_t, bus_dmamap_t, 80 struct uio *, int)); 81 int lca_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 82 struct uio *, int)); 83 84 int lca_bus_dmamap_load_raw_direct __P((bus_dma_tag_t, bus_dmamap_t, 85 bus_dma_segment_t *, int, bus_size_t, int)); 86 int lca_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 87 bus_dma_segment_t *, int, bus_size_t, int)); 88 89 void lca_bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); 90 91 /* 92 * The 1G direct-mapped DMA window begins at this PCI address. 93 */ 94 #define LCA_DIRECT_MAPPED_BASE 0x40000000 95 96 /* 97 * The 8M SGMAP-mapped DMA window begins at this PCI address. 98 */ 99 #define LCA_SGMAP_MAPPED_BASE (8*1024*1024) 100 101 /* 102 * Macro to flush LCA scatter/gather TLB. 103 */ 104 #define LCA_TLB_INVALIDATE() \ 105 do { \ 106 REGVAL64(LCA_IOC_TBIA) = 0; \ 107 alpha_mb(); \ 108 } while (0) 109 110 void 111 lca_dma_init(lcp) 112 struct lca_config *lcp; 113 { 114 bus_dma_tag_t t; 115 116 /* 117 * Initialize the DMA tag used for direct-mapped DMA. 118 */ 119 t = &lcp->lc_dmat_direct; 120 t->_cookie = lcp; 121 t->_get_tag = lca_dma_get_tag; 122 t->_dmamap_create = lca_bus_dmamap_create; 123 t->_dmamap_destroy = lca_bus_dmamap_destroy; 124 t->_dmamap_load = lca_bus_dmamap_load_direct; 125 t->_dmamap_load_mbuf = lca_bus_dmamap_load_mbuf_direct; 126 t->_dmamap_load_uio = lca_bus_dmamap_load_uio_direct; 127 t->_dmamap_load_raw = lca_bus_dmamap_load_raw_direct; 128 t->_dmamap_unload = lca_bus_dmamap_unload; 129 t->_dmamap_sync = NULL; /* Nothing to do. */ 130 131 t->_dmamem_alloc = _bus_dmamem_alloc; 132 t->_dmamem_free = _bus_dmamem_free; 133 t->_dmamem_map = _bus_dmamem_map; 134 t->_dmamem_unmap = _bus_dmamem_unmap; 135 t->_dmamem_mmap = _bus_dmamem_mmap; 136 137 /* 138 * Initialize the DMA tag used for sgmap-mapped DMA. 139 */ 140 t = &lcp->lc_dmat_sgmap; 141 t->_cookie = lcp; 142 t->_get_tag = lca_dma_get_tag; 143 t->_dmamap_create = lca_bus_dmamap_create_sgmap; 144 t->_dmamap_destroy = lca_bus_dmamap_destroy; 145 t->_dmamap_load = lca_bus_dmamap_load_sgmap; 146 t->_dmamap_load_mbuf = lca_bus_dmamap_load_mbuf_sgmap; 147 t->_dmamap_load_uio = lca_bus_dmamap_load_uio_sgmap; 148 t->_dmamap_load_raw = lca_bus_dmamap_load_raw_sgmap; 149 t->_dmamap_unload = lca_bus_dmamap_unload; 150 t->_dmamap_sync = NULL; /* Nothing to do. */ 151 152 t->_dmamem_alloc = _bus_dmamem_alloc; 153 t->_dmamem_free = _bus_dmamem_free; 154 t->_dmamem_map = _bus_dmamem_map; 155 t->_dmamem_unmap = _bus_dmamem_unmap; 156 t->_dmamem_mmap = _bus_dmamem_mmap; 157 158 /* 159 * The firmware has set up window 1 as a 1G direct-mapped DMA 160 * window beginning at 1G. We leave it alone. Disable 161 * window 0. 162 */ 163 REGVAL64(LCA_IOC_W_BASE0) = 0; 164 alpha_mb(); 165 166 /* 167 * Initialize the SGMAP if safe to do so. 168 */ 169 if (lcp->lc_mallocsafe) { 170 pci_dma_sgmap_init(t, &lcp->lc_sgmap, "lca_sgmap", 171 LCA_SGMAP_MAPPED_BASE, (8*1024*1024)); 172 173 /* 174 * Set up window 0 as an 8MB SGMAP-mapped window 175 * starting at 8MB. 176 */ 177 if ((lcp->lc_sgmap.aps_ptpa & IOC_W_T_BASE) != 178 lcp->lc_sgmap.aps_ptpa) 179 panic("lca_dma_init: bad page table address"); 180 REGVAL64(LCA_IOC_W_T_BASE0) = lcp->lc_sgmap.aps_ptpa; 181 REGVAL64(LCA_IOC_W_MASK0) = IOC_W_MASK_8M; 182 alpha_mb(); 183 184 /* Enble the scatter/gather TLB. */ 185 REGVAL64(LCA_IOC_TB_ENA) = IOC_TB_ENA_TEN; 186 alpha_mb(); 187 188 REGVAL64(LCA_IOC_W_BASE0) = LCA_SGMAP_MAPPED_BASE | 189 IOC_W_BASE_SG | IOC_W_BASE_WEN; 190 alpha_mb(); 191 192 LCA_TLB_INVALIDATE(); 193 } 194 195 /* XXX XXX BEGIN XXX XXX */ 196 { /* XXX */ 197 extern vm_offset_t alpha_XXX_dmamap_or; /* XXX */ 198 alpha_XXX_dmamap_or = LCA_DIRECT_MAPPED_BASE; /* XXX */ 199 } /* XXX */ 200 /* XXX XXX END XXX XXX */ 201 } 202 203 /* 204 * Return the bus dma tag to be used for the specified bus type. 205 * INTERNAL USE ONLY! 206 */ 207 bus_dma_tag_t 208 lca_dma_get_tag(t, bustype) 209 bus_dma_tag_t t; 210 alpha_bus_t bustype; 211 { 212 struct lca_config *lcp = t->_cookie; 213 214 switch (bustype) { 215 case ALPHA_BUS_PCI: 216 case ALPHA_BUS_EISA: 217 /* 218 * Systems with an LCA can only support 1G 219 * of memory, so we use the direct-mapped window 220 * on busses that have 32-bit DMA. 221 */ 222 return (&lcp->lc_dmat_direct); 223 224 case ALPHA_BUS_ISA: 225 /* 226 * ISA doesn't have enough address bits to use 227 * the direct-mapped DMA window, so we must use 228 * SGMAPs. 229 */ 230 return (&lcp->lc_dmat_sgmap); 231 232 default: 233 panic("lca_dma_get_tag: shouldn't be here, really..."); 234 } 235 } 236 237 /* 238 * Create an LCA DMA map. 239 */ 240 int 241 lca_bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, flags, dmamp) 242 bus_dma_tag_t t; 243 bus_size_t size; 244 int nsegments; 245 bus_size_t maxsegsz; 246 bus_size_t boundary; 247 int flags; 248 bus_dmamap_t *dmamp; 249 { 250 struct alpha_pci_dma_cookie *a; 251 bus_dmamap_t map; 252 int error; 253 254 /* Call common function to create the basic map. */ 255 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, 256 flags, dmamp); 257 if (error) 258 return (error); 259 260 map = *dmamp; 261 262 /* Allocate PCI-specific housekeeping stuff. */ 263 a = malloc(sizeof(struct alpha_pci_dma_cookie), M_DEVBUF, 264 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK); 265 if (a == NULL) { 266 _bus_dmamap_destroy(t, map); 267 return (ENOMEM); 268 } 269 bzero(a, sizeof(struct alpha_pci_dma_cookie)); 270 map->_dm_cookie = a; 271 272 return (0); 273 } 274 275 int 276 lca_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 277 flags, dmamp) 278 bus_dma_tag_t t; 279 bus_size_t size; 280 int nsegments; 281 bus_size_t maxsegsz; 282 bus_size_t boundary; 283 int flags; 284 bus_dmamap_t *dmamp; 285 { 286 struct lca_config *lcp = t->_cookie; 287 struct alpha_pci_dma_cookie *a; 288 bus_dmamap_t map; 289 int error; 290 291 error = lca_bus_dmamap_create(t, size, nsegments, maxsegsz, 292 boundary, flags, dmamp); 293 if (error) 294 return (error); 295 296 map = *dmamp; 297 a = map->_dm_cookie; 298 299 if (flags & BUS_DMA_ALLOCNOW) 300 error = pci_dma_sgmap_alloc(map, round_page(size), 301 &lcp->lc_sgmap, a, flags); 302 303 return (error); 304 } 305 306 /* 307 * Destroy an LCA DMA map. 308 */ 309 void 310 lca_bus_dmamap_destroy(t, map) 311 bus_dma_tag_t t; 312 bus_dmamap_t map; 313 { 314 struct lca_config *lcp = t->_cookie; 315 struct alpha_pci_dma_cookie *a = map->_dm_cookie; 316 317 if (a->apdc_flags & APDC_HAS_SGMAP) 318 pci_dma_sgmap_free(&lcp->lc_sgmap, a); 319 320 free(map->_dm_cookie, M_DEVBUF); 321 _bus_dmamap_destroy(t, map); 322 } 323 324 /* 325 * Load an LCA direct-mapped DMA map with a linear buffer. 326 */ 327 int 328 lca_bus_dmamap_load_direct(t, map, buf, buflen, p, flags) 329 bus_dma_tag_t t; 330 bus_dmamap_t map; 331 void *buf; 332 bus_size_t buflen; 333 struct proc *p; 334 int flags; 335 { 336 337 return (_bus_dmamap_load_direct_common(t, map, buf, buflen, p, 338 flags, LCA_DIRECT_MAPPED_BASE)); 339 } 340 341 /* 342 * Load an LCA SGMAP-mapped DMA map with a linear buffer. 343 */ 344 int 345 lca_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 346 bus_dma_tag_t t; 347 bus_dmamap_t map; 348 void *buf; 349 bus_size_t buflen; 350 struct proc *p; 351 int flags; 352 { 353 struct lca_config *lcp = t->_cookie; 354 struct alpha_pci_dma_cookie *a = map->_dm_cookie; 355 int error; 356 357 error = pci_dma_sgmap_load(t, map, buf, buflen, p, flags, 358 &lcp->lc_sgmap, a); 359 if (error == 0) 360 LCA_TLB_INVALIDATE(); 361 362 return (error); 363 } 364 365 /* 366 * Load an LCA direct-mapped DMA map with an mbuf chain. 367 */ 368 int 369 lca_bus_dmamap_load_mbuf_direct(t, map, m, flags) 370 bus_dma_tag_t t; 371 bus_dmamap_t map; 372 struct mbuf *m; 373 int flags; 374 { 375 376 return (_bus_dmamap_load_mbuf_direct_common(t, map, m, 377 flags, LCA_DIRECT_MAPPED_BASE)); 378 } 379 380 /* 381 * Load an LCA SGMAP-mapped DMA map with an mbuf chain. 382 */ 383 int 384 lca_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 385 bus_dma_tag_t t; 386 bus_dmamap_t map; 387 struct mbuf *m; 388 int flags; 389 { 390 struct lca_config *lcp = t->_cookie; 391 struct alpha_pci_dma_cookie *a = map->_dm_cookie; 392 int error; 393 394 error = pci_dma_sgmap_load_mbuf(t, map, m, flags, &lcp->lc_sgmap, a); 395 if (error == 0) 396 LCA_TLB_INVALIDATE(); 397 398 return (error); 399 } 400 401 /* 402 * Load an LCA direct-mapped DMA map with a uio. 403 */ 404 int 405 lca_bus_dmamap_load_uio_direct(t, map, uio, flags) 406 bus_dma_tag_t t; 407 bus_dmamap_t map; 408 struct uio *uio; 409 int flags; 410 { 411 412 return (_bus_dmamap_load_uio_direct_common(t, map, uio, 413 flags, LCA_DIRECT_MAPPED_BASE)); 414 } 415 416 /* 417 * Load an LCA SGMAP-mapped DMA map with a uio. 418 */ 419 int 420 lca_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 421 bus_dma_tag_t t; 422 bus_dmamap_t map; 423 struct uio *uio; 424 int flags; 425 { 426 struct lca_config *lcp = t->_cookie; 427 struct alpha_pci_dma_cookie *a = map->_dm_cookie; 428 int error; 429 430 error = pci_dma_sgmap_load_uio(t, map, uio, flags, &lcp->lc_sgmap, a); 431 if (error == 0) 432 LCA_TLB_INVALIDATE(); 433 434 return (error); 435 } 436 437 /* 438 * Load an LCA direct-mapped DMA map with raw memory. 439 */ 440 int 441 lca_bus_dmamap_load_raw_direct(t, map, segs, nsegs, size, flags) 442 bus_dma_tag_t t; 443 bus_dmamap_t map; 444 bus_dma_segment_t *segs; 445 int nsegs; 446 bus_size_t size; 447 int flags; 448 { 449 450 return (_bus_dmamap_load_raw_direct_common(t, map, segs, nsegs, 451 size, flags, LCA_DIRECT_MAPPED_BASE)); 452 } 453 454 /* 455 * Load an LCA SGMAP-mapped DMA map with raw memory. 456 */ 457 int 458 lca_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 459 bus_dma_tag_t t; 460 bus_dmamap_t map; 461 bus_dma_segment_t *segs; 462 int nsegs; 463 bus_size_t size; 464 int flags; 465 { 466 struct lca_config *lcp = t->_cookie; 467 struct alpha_pci_dma_cookie *a = map->_dm_cookie; 468 int error; 469 470 error = pci_dma_sgmap_load_raw(t, map, segs, nsegs, size, flags, 471 &lcp->lc_sgmap, a); 472 if (error == 0) 473 LCA_TLB_INVALIDATE(); 474 475 return (error); 476 } 477 478 /* 479 * Unload an LCA DMA map. 480 */ 481 void 482 lca_bus_dmamap_unload(t, map) 483 bus_dma_tag_t t; 484 bus_dmamap_t map; 485 { 486 struct lca_config *lcp = t->_cookie; 487 struct alpha_pci_dma_cookie *a = map->_dm_cookie; 488 489 /* 490 * Invalidate any SGMAP page table entries used by this 491 * mapping. 492 */ 493 if (a->apdc_flags & APDC_USING_SGMAP) { 494 pci_dma_sgmap_unload(t, map, &lcp->lc_sgmap, a); 495 LCA_TLB_INVALIDATE(); 496 } 497 498 /* 499 * Do the generic bits of the unload. 500 */ 501 _bus_dmamap_unload(t, map); 502 } 503
Indexes created Tue Oct 21 19:09:51 GMT 2025