mcpcia_dma.c revision 1.12
1 /* $NetBSD: mcpcia_dma.c,v 1.12 1999/04/15 23:47:52 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 1999 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 and Matthew Jacob of the Numerical Aerospace Simulation 9 * Facility, 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 <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 41 42 __KERNEL_RCSID(0, "$NetBSD: mcpcia_dma.c,v 1.12 1999/04/15 23:47:52 thorpej Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/device.h> 48 #include <sys/malloc.h> 49 #include <vm/vm.h> 50 51 #define _ALPHA_BUS_DMA_PRIVATE 52 #include <machine/bus.h> 53 54 #include <dev/pci/pcireg.h> 55 #include <dev/pci/pcivar.h> 56 #include <alpha/pci/mcpciareg.h> 57 #include <alpha/pci/mcpciavar.h> 58 #include <alpha/pci/pci_kn300.h> 59 60 bus_dma_tag_t mcpcia_dma_get_tag __P((bus_dma_tag_t, alpha_bus_t)); 61 62 int mcpcia_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, 63 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 64 65 void mcpcia_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 66 67 int mcpcia_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 68 bus_size_t, struct proc *, int)); 69 70 int mcpcia_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 71 struct mbuf *, int)); 72 73 int mcpcia_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 74 struct uio *, int)); 75 76 int mcpcia_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 77 bus_dma_segment_t *, int, bus_size_t, int)); 78 79 void mcpcia_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 80 81 /* 82 * Direct-mapped window: 2G at 2G 83 */ 84 #define MCPCIA_DIRECT_MAPPED_BASE (2UL*1024UL*1024UL*1024UL) 85 #define MCPCIA_DIRECT_MAPPED_SIZE (2UL*1024UL*1024UL*1024UL) 86 87 /* 88 * SGMAP window for PCI: 1G at 1G 89 */ 90 #define MCPCIA_PCI_SG_MAPPED_BASE (1UL*1024UL*1024UL*1024UL) 91 #define MCPCIA_PCI_SG_MAPPED_SIZE (1UL*1024UL*1024UL*1024UL) 92 93 /* 94 * SGMAP window for ISA: 8M at 8M 95 */ 96 #define MCPCIA_ISA_SG_MAPPED_BASE (8*1024*1024) 97 #define MCPCIA_ISA_SG_MAPPED_SIZE (8*1024*1024) 98 99 #define MCPCIA_SGTLB_INVALIDATE(ccp) \ 100 do { \ 101 alpha_mb(); \ 102 REGVAL(MCPCIA_SG_TBIA(ccp)) = 0xdeadbeef; \ 103 alpha_mb(); \ 104 } while (0) 105 106 void 107 mcpcia_dma_init(ccp) 108 struct mcpcia_config *ccp; 109 { 110 bus_dma_tag_t t; 111 112 /* 113 * Initialize the DMA tag used for direct-mapped DMA. 114 */ 115 t = &ccp->cc_dmat_direct; 116 t->_cookie = ccp; 117 t->_wbase = MCPCIA_DIRECT_MAPPED_BASE; 118 t->_wsize = MCPCIA_DIRECT_MAPPED_SIZE; 119 t->_next_window = &ccp->cc_dmat_pci_sgmap; 120 t->_boundary = 0; 121 t->_sgmap = NULL; 122 t->_get_tag = mcpcia_dma_get_tag; 123 t->_dmamap_create = _bus_dmamap_create; 124 t->_dmamap_destroy = _bus_dmamap_destroy; 125 t->_dmamap_load = _bus_dmamap_load_direct; 126 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 127 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 128 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 129 t->_dmamap_unload = _bus_dmamap_unload; 130 t->_dmamap_sync = _bus_dmamap_sync; 131 132 t->_dmamem_alloc = _bus_dmamem_alloc; 133 t->_dmamem_free = _bus_dmamem_free; 134 t->_dmamem_map = _bus_dmamem_map; 135 t->_dmamem_unmap = _bus_dmamem_unmap; 136 t->_dmamem_mmap = _bus_dmamem_mmap; 137 138 /* 139 * Initialize the DMA tag used for sgmap-mapped PCI DMA. 140 */ 141 t = &ccp->cc_dmat_pci_sgmap; 142 t->_cookie = ccp; 143 t->_wbase = MCPCIA_PCI_SG_MAPPED_BASE; 144 t->_wsize = MCPCIA_PCI_SG_MAPPED_SIZE; 145 t->_next_window = NULL; 146 t->_boundary = 0; 147 t->_sgmap = &ccp->cc_pci_sgmap; 148 t->_get_tag = mcpcia_dma_get_tag; 149 t->_dmamap_create = mcpcia_bus_dmamap_create_sgmap; 150 t->_dmamap_destroy = mcpcia_bus_dmamap_destroy_sgmap; 151 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 152 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 153 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 154 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 155 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 156 t->_dmamap_sync = _bus_dmamap_sync; 157 158 t->_dmamem_alloc = _bus_dmamem_alloc; 159 t->_dmamem_free = _bus_dmamem_free; 160 t->_dmamem_map = _bus_dmamem_map; 161 t->_dmamem_unmap = _bus_dmamem_unmap; 162 t->_dmamem_mmap = _bus_dmamem_mmap; 163 164 /* 165 * Initialize the DMA tag used for sgmap-mapped ISA DMA. 166 */ 167 t = &ccp->cc_dmat_isa_sgmap; 168 t->_cookie = ccp; 169 t->_wbase = MCPCIA_ISA_SG_MAPPED_BASE; 170 t->_wsize = MCPCIA_ISA_SG_MAPPED_SIZE; 171 t->_next_window = NULL; 172 t->_boundary = 0; 173 t->_sgmap = &ccp->cc_isa_sgmap; 174 t->_get_tag = mcpcia_dma_get_tag; 175 t->_dmamap_create = mcpcia_bus_dmamap_create_sgmap; 176 t->_dmamap_destroy = mcpcia_bus_dmamap_destroy_sgmap; 177 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 178 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 179 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 180 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 181 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 182 t->_dmamap_sync = _bus_dmamap_sync; 183 184 t->_dmamem_alloc = _bus_dmamem_alloc; 185 t->_dmamem_free = _bus_dmamem_free; 186 t->_dmamem_map = _bus_dmamem_map; 187 t->_dmamem_unmap = _bus_dmamem_unmap; 188 t->_dmamem_mmap = _bus_dmamem_mmap; 189 190 /* 191 * Initialize the SGMAPs. 192 */ 193 alpha_sgmap_init(&ccp->cc_dmat_pci_sgmap, &ccp->cc_pci_sgmap, 194 "mcpcia pci sgmap", 195 MCPCIA_PCI_SG_MAPPED_BASE, 0, MCPCIA_PCI_SG_MAPPED_SIZE, 196 sizeof(u_int64_t), NULL, 0); 197 198 alpha_sgmap_init(&ccp->cc_dmat_isa_sgmap, &ccp->cc_isa_sgmap, 199 "mcpcia isa sgmap", 200 MCPCIA_ISA_SG_MAPPED_BASE, 0, MCPCIA_ISA_SG_MAPPED_SIZE, 201 sizeof(u_int64_t), NULL, 0); 202 203 /* 204 * Disable windows first. 205 */ 206 207 REGVAL(MCPCIA_W0_BASE(ccp)) = 0; 208 REGVAL(MCPCIA_W1_BASE(ccp)) = 0; 209 REGVAL(MCPCIA_W2_BASE(ccp)) = 0; 210 REGVAL(MCPCIA_W3_BASE(ccp)) = 0; 211 REGVAL(MCPCIA_T0_BASE(ccp)) = 0; 212 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 213 REGVAL(MCPCIA_T2_BASE(ccp)) = 0; 214 REGVAL(MCPCIA_T3_BASE(ccp)) = 0; 215 alpha_mb(); 216 217 /* 218 * Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB. 219 */ 220 REGVAL(MCPCIA_W0_MASK(ccp)) = MCPCIA_WMASK_8M; 221 REGVAL(MCPCIA_T0_BASE(ccp)) = 222 ccp->cc_isa_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 223 alpha_mb(); 224 REGVAL(MCPCIA_W0_BASE(ccp)) = 225 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_ISA_SG_MAPPED_BASE; 226 alpha_mb(); 227 228 MCPCIA_SGTLB_INVALIDATE(ccp); 229 230 /* 231 * Set up window 1 as a 2 GB Direct-mapped window starting at 2GB. 232 */ 233 234 REGVAL(MCPCIA_W1_MASK(ccp)) = MCPCIA_WMASK_2G; 235 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 236 alpha_mb(); 237 REGVAL(MCPCIA_W1_BASE(ccp)) = 238 MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN; 239 alpha_mb(); 240 241 /* 242 * Set up window 2 as a 1G SGMAP-mapped window starting at 1G. 243 */ 244 245 REGVAL(MCPCIA_W2_MASK(ccp)) = MCPCIA_WMASK_1G; 246 REGVAL(MCPCIA_T2_BASE(ccp)) = 247 ccp->cc_pci_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 248 alpha_mb(); 249 REGVAL(MCPCIA_W2_BASE(ccp)) = 250 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_PCI_SG_MAPPED_BASE; 251 alpha_mb(); 252 253 /* XXX XXX BEGIN XXX XXX */ 254 { /* XXX */ 255 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 256 alpha_XXX_dmamap_or = MCPCIA_DIRECT_MAPPED_BASE;/* XXX */ 257 } /* XXX */ 258 /* XXX XXX END XXX XXX */ 259 } 260 261 /* 262 * Return the bus dma tag to be used for the specified bus type. 263 * INTERNAL USE ONLY! 264 */ 265 bus_dma_tag_t 266 mcpcia_dma_get_tag(t, bustype) 267 bus_dma_tag_t t; 268 alpha_bus_t bustype; 269 { 270 struct mcpcia_config *ccp = t->_cookie; 271 272 switch (bustype) { 273 case ALPHA_BUS_PCI: 274 case ALPHA_BUS_EISA: 275 /* 276 * Start off using the direct-mapped window. We will 277 * automatically fall backed onto the chained PCI SGMAP 278 * window if necessary. 279 */ 280 return (&ccp->cc_dmat_direct); 281 282 case ALPHA_BUS_ISA: 283 /* 284 * ISA doesn't have enough address bits to use 285 * the direct-mapped DMA window, so we must use 286 * SGMAPs. 287 */ 288 return (&ccp->cc_dmat_isa_sgmap); 289 290 default: 291 panic("mcpcia_dma_get_tag: shouldn't be here, really..."); 292 } 293 } 294 295 /* 296 * Create a MCPCIA SGMAP-mapped DMA map. 297 */ 298 int 299 mcpcia_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 300 flags, dmamp) 301 bus_dma_tag_t t; 302 bus_size_t size; 303 int nsegments; 304 bus_size_t maxsegsz; 305 bus_size_t boundary; 306 int flags; 307 bus_dmamap_t *dmamp; 308 { 309 bus_dmamap_t map; 310 int error; 311 312 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 313 boundary, flags, dmamp); 314 if (error) 315 return (error); 316 317 map = *dmamp; 318 319 if (flags & BUS_DMA_ALLOCNOW) { 320 error = alpha_sgmap_alloc(map, round_page(size), 321 t->_sgmap, flags); 322 if (error) 323 mcpcia_bus_dmamap_destroy_sgmap(t, map); 324 } 325 326 return (error); 327 } 328 329 /* 330 * Destroy a MCPCIA SGMAP-mapped DMA map. 331 */ 332 void 333 mcpcia_bus_dmamap_destroy_sgmap(t, map) 334 bus_dma_tag_t t; 335 bus_dmamap_t map; 336 { 337 338 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 339 alpha_sgmap_free(map, t->_sgmap); 340 341 _bus_dmamap_destroy(t, map); 342 } 343 344 /* 345 * Load a MCPCIA SGMAP-mapped DMA map with a linear buffer. 346 */ 347 int 348 mcpcia_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 349 bus_dma_tag_t t; 350 bus_dmamap_t map; 351 void *buf; 352 bus_size_t buflen; 353 struct proc *p; 354 int flags; 355 { 356 int error; 357 struct mcpcia_config *ccp = t->_cookie; 358 359 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 360 t->_sgmap); 361 if (error == 0) 362 MCPCIA_SGTLB_INVALIDATE(ccp); 363 return (error); 364 } 365 366 /* 367 * Load a MCPCIA SGMAP-mapped DMA map with an mbuf chain. 368 */ 369 int 370 mcpcia_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 371 bus_dma_tag_t t; 372 bus_dmamap_t map; 373 struct mbuf *m; 374 int flags; 375 { 376 int error; 377 struct mcpcia_config *ccp = t->_cookie; 378 379 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 380 if (error == 0) 381 MCPCIA_SGTLB_INVALIDATE(ccp); 382 return (error); 383 } 384 385 /* 386 * Load a MCPCIA SGMAP-mapped DMA map with a uio. 387 */ 388 int 389 mcpcia_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 390 bus_dma_tag_t t; 391 bus_dmamap_t map; 392 struct uio *uio; 393 int flags; 394 { 395 int error; 396 struct mcpcia_config *ccp = t->_cookie; 397 398 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 399 if (error == 0) 400 MCPCIA_SGTLB_INVALIDATE(ccp); 401 return (error); 402 } 403 404 /* 405 * Load a MCPCIA SGMAP-mapped DMA map with raw memory. 406 */ 407 int 408 mcpcia_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 409 bus_dma_tag_t t; 410 bus_dmamap_t map; 411 bus_dma_segment_t *segs; 412 int nsegs; 413 bus_size_t size; 414 int flags; 415 { 416 int error; 417 struct mcpcia_config *ccp = t->_cookie; 418 419 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 420 t->_sgmap); 421 if (error == 0) 422 MCPCIA_SGTLB_INVALIDATE(ccp); 423 return (error); 424 } 425 426 /* 427 * Unload a MCPCIA DMA map. 428 */ 429 void 430 mcpcia_bus_dmamap_unload_sgmap(t, map) 431 bus_dma_tag_t t; 432 bus_dmamap_t map; 433 { 434 struct mcpcia_config *ccp = t->_cookie; 435 436 /* 437 * Invalidate any SGMAP page table entries used by this mapping. 438 */ 439 pci_sgmap_pte64_unload(t, map, t->_sgmap); 440 MCPCIA_SGTLB_INVALIDATE(ccp); 441 442 /* 443 * Do the generic bits of the unload. 444 */ 445 _bus_dmamap_unload(t, map); 446 } 447
Indexes created Tue Sep 30 20:09:53 GMT 2025