mcpcia_dma.c revision 1.1
1 /* $NetBSD: mcpcia_dma.c,v 1.1 1998/04/15 00:50:14 mjacob Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 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. This code happens to have been written 10 * by Matthew Jacob for NASA/Ames. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPEMCPCIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 42 43 __KERNEL_RCSID(0, "$NetBSD: mcpcia_dma.c,v 1.1 1998/04/15 00:50:14 mjacob 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/mcpciareg.h> 58 #include <alpha/pci/mcpciavar.h> 59 #include <alpha/pci/pci_kn300.h> 60 61 bus_dma_tag_t mcpcia_dma_get_tag __P((bus_dma_tag_t, alpha_bus_t)); 62 63 int mcpcia_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, 64 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 65 66 void mcpcia_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 67 68 int mcpcia_bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t, void *, 69 bus_size_t, struct proc *, int)); 70 71 int mcpcia_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 72 bus_size_t, struct proc *, int)); 73 74 int mcpcia_bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t, bus_dmamap_t, 75 struct mbuf *, int)); 76 77 int mcpcia_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 78 struct mbuf *, int)); 79 80 int mcpcia_bus_dmamap_load_uio_direct __P((bus_dma_tag_t, bus_dmamap_t, 81 struct uio *, int)); 82 int mcpcia_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 83 struct uio *, int)); 84 85 int mcpcia_bus_dmamap_load_raw_direct __P((bus_dma_tag_t, bus_dmamap_t, 86 bus_dma_segment_t *, int, bus_size_t, int)); 87 int mcpcia_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 88 bus_dma_segment_t *, int, bus_size_t, int)); 89 90 void mcpcia_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 91 92 #define MCPCIA_DIRECT_MAPPED_BASE 0x80000000 93 #define MCPCIA_SG_MAPPED_BASE (8 << 20) 94 95 #define MCPCIA_SGTLB_INVALIDATE(mcp) \ 96 alpha_mb(), \ 97 REGVAL(MCPCIA_SG_TBIA(mcp)) = 0xdeadbeef, \ 98 alpha_mb() 99 100 void 101 mcpcia_dma_init(ccp) 102 struct mcpcia_config *ccp; 103 { 104 bus_dma_tag_t t; 105 106 /* 107 * Initialize the DMA tag used for direct-mapped DMA. 108 */ 109 t = &ccp->cc_dmat_direct; 110 t->_cookie = ccp; 111 t->_get_tag = mcpcia_dma_get_tag; 112 t->_dmamap_create = _bus_dmamap_create; 113 t->_dmamap_destroy = _bus_dmamap_destroy; 114 t->_dmamap_load = mcpcia_bus_dmamap_load_direct; 115 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_direct; 116 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_direct; 117 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_direct; 118 t->_dmamap_unload = _bus_dmamap_unload; 119 t->_dmamap_sync = _bus_dmamap_sync; 120 121 t->_dmamem_alloc = _bus_dmamem_alloc; 122 t->_dmamem_free = _bus_dmamem_free; 123 t->_dmamem_map = _bus_dmamem_map; 124 t->_dmamem_unmap = _bus_dmamem_unmap; 125 t->_dmamem_mmap = _bus_dmamem_mmap; 126 127 /* 128 * Initialize the DMA tag used for sgmap-mapped DMA. 129 */ 130 t = &ccp->cc_dmat_sgmap; 131 t->_cookie = ccp; 132 t->_get_tag = mcpcia_dma_get_tag; 133 t->_dmamap_create = mcpcia_bus_dmamap_create_sgmap; 134 t->_dmamap_destroy = mcpcia_bus_dmamap_destroy_sgmap; 135 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 136 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 137 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 138 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 139 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 140 t->_dmamap_sync = _bus_dmamap_sync; 141 142 t->_dmamem_alloc = _bus_dmamem_alloc; 143 t->_dmamem_free = _bus_dmamem_free; 144 t->_dmamem_map = _bus_dmamem_map; 145 t->_dmamem_unmap = _bus_dmamem_unmap; 146 t->_dmamem_mmap = _bus_dmamem_mmap; 147 148 /* 149 * The SRM console is supposed to set up an 8MB direct mapped window 150 * at 8MB (window 0) and a 1MB direct mapped window at 1MB. Useless. 151 * 152 * The DU && OpenVMS convention is to have an 8MB S/G window 153 * at 8MB for window 0, a 1GB direct mapped window at 2GB 154 * for window 1, a 1 GB S/G window at window 2 and a 512 MB 155 * S/G window at window 3. This seems overkill. 156 * 157 * We'll just go with the 8MB S/G window and one 1GB direct window. 158 */ 159 160 /* 161 * Initialize the SGMAP. 162 * 163 * Must align page table to its size. 164 */ 165 alpha_sgmap_init(t, &ccp->cc_sgmap, "mcpcia_sgmap", 166 MCPCIA_SG_MAPPED_BASE, 0, (8 << 20), 167 sizeof(u_int64_t), NULL, 8 << 10); 168 169 if (ccp->cc_sgmap.aps_ptpa & (1024-1)) { 170 panic("mcpcia_dma_init: bad page table address %x", 171 ccp->cc_sgmap.aps_ptpa); 172 } 173 174 /* 175 * Disable windows first. 176 */ 177 178 REGVAL(MCPCIA_W0_BASE(ccp->cc_sc)) = 0; 179 REGVAL(MCPCIA_W1_BASE(ccp->cc_sc)) = 0; 180 REGVAL(MCPCIA_W2_BASE(ccp->cc_sc)) = 0; 181 REGVAL(MCPCIA_W3_BASE(ccp->cc_sc)) = 0; 182 REGVAL(MCPCIA_T0_BASE(ccp->cc_sc)) = 0; 183 REGVAL(MCPCIA_T1_BASE(ccp->cc_sc)) = 0; 184 REGVAL(MCPCIA_T2_BASE(ccp->cc_sc)) = 0; 185 REGVAL(MCPCIA_T3_BASE(ccp->cc_sc)) = 0; 186 alpha_mb(); 187 188 /* 189 * Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB. 190 */ 191 REGVAL(MCPCIA_W0_MASK(ccp->cc_sc)) = MCPCIA_WMASK_8M; 192 REGVAL(MCPCIA_T0_BASE(ccp->cc_sc)) = 193 ccp->cc_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 194 REGVAL(MCPCIA_W0_BASE(ccp->cc_sc)) = 195 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_SG_MAPPED_BASE; 196 alpha_mb(); 197 198 MCPCIA_SGTLB_INVALIDATE(ccp->cc_sc); 199 200 /* 201 * Set up window 1 as a 1 GB Direct-mapped window starting at 2GB. 202 */ 203 204 REGVAL(MCPCIA_W0_MASK(ccp->cc_sc)) = MCPCIA_WMASK_1G; 205 REGVAL(MCPCIA_T0_BASE(ccp->cc_sc)) = 0; 206 REGVAL(MCPCIA_W0_BASE(ccp->cc_sc)) = 207 MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN; 208 alpha_mb(); 209 210 /* XXX XXX BEGIN XXX XXX */ 211 { /* XXX */ 212 extern vm_offset_t alpha_XXX_dmamap_or; /* XXX */ 213 alpha_XXX_dmamap_or = MCPCIA_DIRECT_MAPPED_BASE;/* XXX */ 214 } /* XXX */ 215 /* XXX XXX END XXX XXX */ 216 } 217 218 /* 219 * Return the bus dma tag to be used for the specified bus type. 220 * INTERNAL USE ONLY! 221 */ 222 bus_dma_tag_t 223 mcpcia_dma_get_tag(t, bustype) 224 bus_dma_tag_t t; 225 alpha_bus_t bustype; 226 { 227 struct mcpcia_config *ccp = t->_cookie; 228 extern int physmem; 229 230 switch (bustype) { 231 case ALPHA_BUS_PCI: 232 case ALPHA_BUS_EISA: 233 /* 234 * As best as I can tell from the DU source, you can't 235 * do DIRECT MAPPED and S/G at the same time. 236 */ 237 return (&ccp->cc_dmat_direct); 238 239 case ALPHA_BUS_ISA: 240 /* 241 * ISA doesn't have enough address bits to use 242 * the direct-mapped DMA window, so we must use 243 * SGMAPs. 244 */ 245 return (&ccp->cc_dmat_sgmap); 246 247 default: 248 panic("mcpcia_dma_get_tag: shouldn't be here, really..."); 249 } 250 } 251 252 /* 253 * Create a MCPCIA SGMAP-mapped DMA map. 254 */ 255 int 256 mcpcia_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 257 flags, dmamp) 258 bus_dma_tag_t t; 259 bus_size_t size; 260 int nsegments; 261 bus_size_t maxsegsz; 262 bus_size_t boundary; 263 int flags; 264 bus_dmamap_t *dmamp; 265 { 266 struct mcpcia_config *ccp = t->_cookie; 267 bus_dmamap_t map; 268 int error; 269 270 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 271 boundary, flags, dmamp); 272 if (error) 273 return (error); 274 275 map = *dmamp; 276 277 if (flags & BUS_DMA_ALLOCNOW) { 278 error = alpha_sgmap_alloc(map, round_page(size), 279 &ccp->cc_sgmap, flags); 280 if (error) 281 mcpcia_bus_dmamap_destroy_sgmap(t, map); 282 } 283 284 return (error); 285 } 286 287 /* 288 * Destroy a MCPCIA SGMAP-mapped DMA map. 289 */ 290 void 291 mcpcia_bus_dmamap_destroy_sgmap(t, map) 292 bus_dma_tag_t t; 293 bus_dmamap_t map; 294 { 295 struct mcpcia_config *ccp = t->_cookie; 296 297 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 298 alpha_sgmap_free(map, &ccp->cc_sgmap); 299 300 _bus_dmamap_destroy(t, map); 301 } 302 303 /* 304 * Load a MCPCIA direct-mapped DMA map with a linear buffer. 305 */ 306 int 307 mcpcia_bus_dmamap_load_direct(t, map, buf, buflen, p, flags) 308 bus_dma_tag_t t; 309 bus_dmamap_t map; 310 void *buf; 311 bus_size_t buflen; 312 struct proc *p; 313 int flags; 314 { 315 return (_bus_dmamap_load_direct_common(t, map, buf, buflen, p, 316 flags, MCPCIA_DIRECT_MAPPED_BASE)); 317 } 318 319 /* 320 * Load a MCPCIA SGMAP-mapped DMA map with a linear buffer. 321 */ 322 int 323 mcpcia_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 324 bus_dma_tag_t t; 325 bus_dmamap_t map; 326 void *buf; 327 bus_size_t buflen; 328 struct proc *p; 329 int flags; 330 { 331 int error; 332 struct mcpcia_config *ccp = t->_cookie; 333 334 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, 335 flags, &ccp->cc_sgmap); 336 if (error == 0) 337 MCPCIA_SGTLB_INVALIDATE(ccp->cc_sc); 338 return (error); 339 } 340 341 /* 342 * Load a MCPCIA direct-mapped DMA map with an mbuf chain. 343 */ 344 int 345 mcpcia_bus_dmamap_load_mbuf_direct(t, map, m, flags) 346 bus_dma_tag_t t; 347 bus_dmamap_t map; 348 struct mbuf *m; 349 int flags; 350 { 351 return (_bus_dmamap_load_mbuf_direct_common(t, map, m, 352 flags, MCPCIA_DIRECT_MAPPED_BASE)); 353 } 354 355 /* 356 * Load a MCPCIA SGMAP-mapped DMA map with an mbuf chain. 357 */ 358 int 359 mcpcia_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 360 bus_dma_tag_t t; 361 bus_dmamap_t map; 362 struct mbuf *m; 363 int flags; 364 { 365 int error; 366 struct mcpcia_config *ccp = t->_cookie; 367 368 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, &ccp->cc_sgmap); 369 if (error == 0) 370 MCPCIA_SGTLB_INVALIDATE(ccp->cc_sc); 371 return (error); 372 } 373 374 /* 375 * Load a MCPCIA direct-mapped DMA map with a uio. 376 */ 377 int 378 mcpcia_bus_dmamap_load_uio_direct(t, map, uio, flags) 379 bus_dma_tag_t t; 380 bus_dmamap_t map; 381 struct uio *uio; 382 int flags; 383 { 384 return (_bus_dmamap_load_uio_direct_common(t, map, uio, 385 flags, MCPCIA_DIRECT_MAPPED_BASE)); 386 } 387 388 /* 389 * Load a MCPCIA SGMAP-mapped DMA map with a uio. 390 */ 391 int 392 mcpcia_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 393 bus_dma_tag_t t; 394 bus_dmamap_t map; 395 struct uio *uio; 396 int flags; 397 { 398 int error; 399 struct mcpcia_config *ccp = t->_cookie; 400 401 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, &ccp->cc_sgmap); 402 if (error == 0) 403 MCPCIA_SGTLB_INVALIDATE(ccp->cc_sc); 404 return (error); 405 } 406 407 /* 408 * Load a MCPCIA direct-mapped DMA map with raw memory. 409 */ 410 int 411 mcpcia_bus_dmamap_load_raw_direct(t, map, segs, nsegs, size, flags) 412 bus_dma_tag_t t; 413 bus_dmamap_t map; 414 bus_dma_segment_t *segs; 415 int nsegs; 416 bus_size_t size; 417 int flags; 418 { 419 return (_bus_dmamap_load_raw_direct_common(t, map, segs, nsegs, 420 size, flags, MCPCIA_DIRECT_MAPPED_BASE)); 421 } 422 423 /* 424 * Load a MCPCIA SGMAP-mapped DMA map with raw memory. 425 */ 426 int 427 mcpcia_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 428 bus_dma_tag_t t; 429 bus_dmamap_t map; 430 bus_dma_segment_t *segs; 431 int nsegs; 432 bus_size_t size; 433 int flags; 434 { 435 int error; 436 struct mcpcia_config *ccp = t->_cookie; 437 438 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, 439 size, flags, &ccp->cc_sgmap); 440 if (error == 0) 441 MCPCIA_SGTLB_INVALIDATE(ccp->cc_sc); 442 return (error); 443 } 444 445 /* 446 * Unload a MCPCIA DMA map. 447 */ 448 void 449 mcpcia_bus_dmamap_unload_sgmap(t, map) 450 bus_dma_tag_t t; 451 bus_dmamap_t map; 452 { 453 struct mcpcia_config *ccp = t->_cookie; 454 455 /* 456 * Invalidate any SGMAP page table entries used by this mapping. 457 */ 458 pci_sgmap_pte64_unload(t, map, &ccp->cc_sgmap); 459 MCPCIA_SGTLB_INVALIDATE(ccp->cc_sc); 460 461 /* 462 * Do the generic bits of the unload. 463 */ 464 _bus_dmamap_unload(t, map); 465 } 466
Indexes created Tue Sep 30 20:09:53 GMT 2025