mcpcia_dma.c revision 1.13
1 /* $NetBSD: mcpcia_dma.c,v 1.13 2000/06/29 08:58:47 mrg 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 1.13 2000/06/29 08:58:47 mrg 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 50 #include <uvm/uvm_extern.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_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 69 bus_size_t, struct proc *, int)); 70 71 int mcpcia_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 72 struct mbuf *, int)); 73 74 int mcpcia_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 75 struct uio *, int)); 76 77 int mcpcia_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 78 bus_dma_segment_t *, int, bus_size_t, int)); 79 80 void mcpcia_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 81 82 /* 83 * Direct-mapped window: 2G at 2G 84 */ 85 #define MCPCIA_DIRECT_MAPPED_BASE (2UL*1024UL*1024UL*1024UL) 86 #define MCPCIA_DIRECT_MAPPED_SIZE (2UL*1024UL*1024UL*1024UL) 87 88 /* 89 * SGMAP window for PCI: 1G at 1G 90 */ 91 #define MCPCIA_PCI_SG_MAPPED_BASE (1UL*1024UL*1024UL*1024UL) 92 #define MCPCIA_PCI_SG_MAPPED_SIZE (1UL*1024UL*1024UL*1024UL) 93 94 /* 95 * SGMAP window for ISA: 8M at 8M 96 */ 97 #define MCPCIA_ISA_SG_MAPPED_BASE (8*1024*1024) 98 #define MCPCIA_ISA_SG_MAPPED_SIZE (8*1024*1024) 99 100 #define MCPCIA_SGTLB_INVALIDATE(ccp) \ 101 do { \ 102 alpha_mb(); \ 103 REGVAL(MCPCIA_SG_TBIA(ccp)) = 0xdeadbeef; \ 104 alpha_mb(); \ 105 } while (0) 106 107 void 108 mcpcia_dma_init(ccp) 109 struct mcpcia_config *ccp; 110 { 111 bus_dma_tag_t t; 112 113 /* 114 * Initialize the DMA tag used for direct-mapped DMA. 115 */ 116 t = &ccp->cc_dmat_direct; 117 t->_cookie = ccp; 118 t->_wbase = MCPCIA_DIRECT_MAPPED_BASE; 119 t->_wsize = MCPCIA_DIRECT_MAPPED_SIZE; 120 t->_next_window = &ccp->cc_dmat_pci_sgmap; 121 t->_boundary = 0; 122 t->_sgmap = NULL; 123 t->_get_tag = mcpcia_dma_get_tag; 124 t->_dmamap_create = _bus_dmamap_create; 125 t->_dmamap_destroy = _bus_dmamap_destroy; 126 t->_dmamap_load = _bus_dmamap_load_direct; 127 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 128 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 129 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 130 t->_dmamap_unload = _bus_dmamap_unload; 131 t->_dmamap_sync = _bus_dmamap_sync; 132 133 t->_dmamem_alloc = _bus_dmamem_alloc; 134 t->_dmamem_free = _bus_dmamem_free; 135 t->_dmamem_map = _bus_dmamem_map; 136 t->_dmamem_unmap = _bus_dmamem_unmap; 137 t->_dmamem_mmap = _bus_dmamem_mmap; 138 139 /* 140 * Initialize the DMA tag used for sgmap-mapped PCI DMA. 141 */ 142 t = &ccp->cc_dmat_pci_sgmap; 143 t->_cookie = ccp; 144 t->_wbase = MCPCIA_PCI_SG_MAPPED_BASE; 145 t->_wsize = MCPCIA_PCI_SG_MAPPED_SIZE; 146 t->_next_window = NULL; 147 t->_boundary = 0; 148 t->_sgmap = &ccp->cc_pci_sgmap; 149 t->_get_tag = mcpcia_dma_get_tag; 150 t->_dmamap_create = mcpcia_bus_dmamap_create_sgmap; 151 t->_dmamap_destroy = mcpcia_bus_dmamap_destroy_sgmap; 152 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 153 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 154 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 155 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 156 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 157 t->_dmamap_sync = _bus_dmamap_sync; 158 159 t->_dmamem_alloc = _bus_dmamem_alloc; 160 t->_dmamem_free = _bus_dmamem_free; 161 t->_dmamem_map = _bus_dmamem_map; 162 t->_dmamem_unmap = _bus_dmamem_unmap; 163 t->_dmamem_mmap = _bus_dmamem_mmap; 164 165 /* 166 * Initialize the DMA tag used for sgmap-mapped ISA DMA. 167 */ 168 t = &ccp->cc_dmat_isa_sgmap; 169 t->_cookie = ccp; 170 t->_wbase = MCPCIA_ISA_SG_MAPPED_BASE; 171 t->_wsize = MCPCIA_ISA_SG_MAPPED_SIZE; 172 t->_next_window = NULL; 173 t->_boundary = 0; 174 t->_sgmap = &ccp->cc_isa_sgmap; 175 t->_get_tag = mcpcia_dma_get_tag; 176 t->_dmamap_create = mcpcia_bus_dmamap_create_sgmap; 177 t->_dmamap_destroy = mcpcia_bus_dmamap_destroy_sgmap; 178 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 179 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 180 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 181 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 182 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 183 t->_dmamap_sync = _bus_dmamap_sync; 184 185 t->_dmamem_alloc = _bus_dmamem_alloc; 186 t->_dmamem_free = _bus_dmamem_free; 187 t->_dmamem_map = _bus_dmamem_map; 188 t->_dmamem_unmap = _bus_dmamem_unmap; 189 t->_dmamem_mmap = _bus_dmamem_mmap; 190 191 /* 192 * Initialize the SGMAPs. 193 */ 194 alpha_sgmap_init(&ccp->cc_dmat_pci_sgmap, &ccp->cc_pci_sgmap, 195 "mcpcia pci sgmap", 196 MCPCIA_PCI_SG_MAPPED_BASE, 0, MCPCIA_PCI_SG_MAPPED_SIZE, 197 sizeof(u_int64_t), NULL, 0); 198 199 alpha_sgmap_init(&ccp->cc_dmat_isa_sgmap, &ccp->cc_isa_sgmap, 200 "mcpcia isa sgmap", 201 MCPCIA_ISA_SG_MAPPED_BASE, 0, MCPCIA_ISA_SG_MAPPED_SIZE, 202 sizeof(u_int64_t), NULL, 0); 203 204 /* 205 * Disable windows first. 206 */ 207 208 REGVAL(MCPCIA_W0_BASE(ccp)) = 0; 209 REGVAL(MCPCIA_W1_BASE(ccp)) = 0; 210 REGVAL(MCPCIA_W2_BASE(ccp)) = 0; 211 REGVAL(MCPCIA_W3_BASE(ccp)) = 0; 212 REGVAL(MCPCIA_T0_BASE(ccp)) = 0; 213 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 214 REGVAL(MCPCIA_T2_BASE(ccp)) = 0; 215 REGVAL(MCPCIA_T3_BASE(ccp)) = 0; 216 alpha_mb(); 217 218 /* 219 * Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB. 220 */ 221 REGVAL(MCPCIA_W0_MASK(ccp)) = MCPCIA_WMASK_8M; 222 REGVAL(MCPCIA_T0_BASE(ccp)) = 223 ccp->cc_isa_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 224 alpha_mb(); 225 REGVAL(MCPCIA_W0_BASE(ccp)) = 226 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_ISA_SG_MAPPED_BASE; 227 alpha_mb(); 228 229 MCPCIA_SGTLB_INVALIDATE(ccp); 230 231 /* 232 * Set up window 1 as a 2 GB Direct-mapped window starting at 2GB. 233 */ 234 235 REGVAL(MCPCIA_W1_MASK(ccp)) = MCPCIA_WMASK_2G; 236 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 237 alpha_mb(); 238 REGVAL(MCPCIA_W1_BASE(ccp)) = 239 MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN; 240 alpha_mb(); 241 242 /* 243 * Set up window 2 as a 1G SGMAP-mapped window starting at 1G. 244 */ 245 246 REGVAL(MCPCIA_W2_MASK(ccp)) = MCPCIA_WMASK_1G; 247 REGVAL(MCPCIA_T2_BASE(ccp)) = 248 ccp->cc_pci_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 249 alpha_mb(); 250 REGVAL(MCPCIA_W2_BASE(ccp)) = 251 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_PCI_SG_MAPPED_BASE; 252 alpha_mb(); 253 254 /* XXX XXX BEGIN XXX XXX */ 255 { /* XXX */ 256 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 257 alpha_XXX_dmamap_or = MCPCIA_DIRECT_MAPPED_BASE;/* XXX */ 258 } /* XXX */ 259 /* XXX XXX END XXX XXX */ 260 } 261 262 /* 263 * Return the bus dma tag to be used for the specified bus type. 264 * INTERNAL USE ONLY! 265 */ 266 bus_dma_tag_t 267 mcpcia_dma_get_tag(t, bustype) 268 bus_dma_tag_t t; 269 alpha_bus_t bustype; 270 { 271 struct mcpcia_config *ccp = t->_cookie; 272 273 switch (bustype) { 274 case ALPHA_BUS_PCI: 275 case ALPHA_BUS_EISA: 276 /* 277 * Start off using the direct-mapped window. We will 278 * automatically fall backed onto the chained PCI SGMAP 279 * window if necessary. 280 */ 281 return (&ccp->cc_dmat_direct); 282 283 case ALPHA_BUS_ISA: 284 /* 285 * ISA doesn't have enough address bits to use 286 * the direct-mapped DMA window, so we must use 287 * SGMAPs. 288 */ 289 return (&ccp->cc_dmat_isa_sgmap); 290 291 default: 292 panic("mcpcia_dma_get_tag: shouldn't be here, really..."); 293 } 294 } 295 296 /* 297 * Create a MCPCIA SGMAP-mapped DMA map. 298 */ 299 int 300 mcpcia_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 301 flags, dmamp) 302 bus_dma_tag_t t; 303 bus_size_t size; 304 int nsegments; 305 bus_size_t maxsegsz; 306 bus_size_t boundary; 307 int flags; 308 bus_dmamap_t *dmamp; 309 { 310 bus_dmamap_t map; 311 int error; 312 313 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 314 boundary, flags, dmamp); 315 if (error) 316 return (error); 317 318 map = *dmamp; 319 320 if (flags & BUS_DMA_ALLOCNOW) { 321 error = alpha_sgmap_alloc(map, round_page(size), 322 t->_sgmap, flags); 323 if (error) 324 mcpcia_bus_dmamap_destroy_sgmap(t, map); 325 } 326 327 return (error); 328 } 329 330 /* 331 * Destroy a MCPCIA SGMAP-mapped DMA map. 332 */ 333 void 334 mcpcia_bus_dmamap_destroy_sgmap(t, map) 335 bus_dma_tag_t t; 336 bus_dmamap_t map; 337 { 338 339 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 340 alpha_sgmap_free(map, t->_sgmap); 341 342 _bus_dmamap_destroy(t, map); 343 } 344 345 /* 346 * Load a MCPCIA SGMAP-mapped DMA map with a linear buffer. 347 */ 348 int 349 mcpcia_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 350 bus_dma_tag_t t; 351 bus_dmamap_t map; 352 void *buf; 353 bus_size_t buflen; 354 struct proc *p; 355 int flags; 356 { 357 int error; 358 struct mcpcia_config *ccp = t->_cookie; 359 360 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 361 t->_sgmap); 362 if (error == 0) 363 MCPCIA_SGTLB_INVALIDATE(ccp); 364 return (error); 365 } 366 367 /* 368 * Load a MCPCIA SGMAP-mapped DMA map with an mbuf chain. 369 */ 370 int 371 mcpcia_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 372 bus_dma_tag_t t; 373 bus_dmamap_t map; 374 struct mbuf *m; 375 int flags; 376 { 377 int error; 378 struct mcpcia_config *ccp = t->_cookie; 379 380 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 381 if (error == 0) 382 MCPCIA_SGTLB_INVALIDATE(ccp); 383 return (error); 384 } 385 386 /* 387 * Load a MCPCIA SGMAP-mapped DMA map with a uio. 388 */ 389 int 390 mcpcia_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 391 bus_dma_tag_t t; 392 bus_dmamap_t map; 393 struct uio *uio; 394 int flags; 395 { 396 int error; 397 struct mcpcia_config *ccp = t->_cookie; 398 399 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 400 if (error == 0) 401 MCPCIA_SGTLB_INVALIDATE(ccp); 402 return (error); 403 } 404 405 /* 406 * Load a MCPCIA SGMAP-mapped DMA map with raw memory. 407 */ 408 int 409 mcpcia_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 410 bus_dma_tag_t t; 411 bus_dmamap_t map; 412 bus_dma_segment_t *segs; 413 int nsegs; 414 bus_size_t size; 415 int flags; 416 { 417 int error; 418 struct mcpcia_config *ccp = t->_cookie; 419 420 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 421 t->_sgmap); 422 if (error == 0) 423 MCPCIA_SGTLB_INVALIDATE(ccp); 424 return (error); 425 } 426 427 /* 428 * Unload a MCPCIA DMA map. 429 */ 430 void 431 mcpcia_bus_dmamap_unload_sgmap(t, map) 432 bus_dma_tag_t t; 433 bus_dmamap_t map; 434 { 435 struct mcpcia_config *ccp = t->_cookie; 436 437 /* 438 * Invalidate any SGMAP page table entries used by this mapping. 439 */ 440 pci_sgmap_pte64_unload(t, map, t->_sgmap); 441 MCPCIA_SGTLB_INVALIDATE(ccp); 442 443 /* 444 * Do the generic bits of the unload. 445 */ 446 _bus_dmamap_unload(t, map); 447 } 448
Indexes created Mon Sep 29 21:09:56 GMT 2025