dwlpx_dma.c revision 1.7
1 /* $NetBSD: dwlpx_dma.c,v 1.7 1998/03/23 07:42:40 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. 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, SPEDWLPxL, 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: dwlpx_dma.c,v 1.7 1998/03/23 07:42:40 mjacob 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/tlsb/tlsbreg.h> 57 #include <alpha/tlsb/kftxxvar.h> 58 #include <alpha/tlsb/kftxxreg.h> 59 #include <alpha/pci/dwlpxreg.h> 60 #include <alpha/pci/dwlpxvar.h> 61 #include <alpha/pci/pci_kn8ae.h> 62 63 bus_dma_tag_t dwlpx_dma_get_tag __P((bus_dma_tag_t, alpha_bus_t)); 64 65 int dwlpx_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, 66 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 67 68 void dwlpx_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 69 70 int dwlpx_bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t, void *, 71 bus_size_t, struct proc *, int)); 72 73 int dwlpx_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 74 bus_size_t, struct proc *, int)); 75 76 int dwlpx_bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t, bus_dmamap_t, 77 struct mbuf *, int)); 78 79 int dwlpx_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 80 struct mbuf *, int)); 81 82 int dwlpx_bus_dmamap_load_uio_direct __P((bus_dma_tag_t, bus_dmamap_t, 83 struct uio *, int)); 84 int dwlpx_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 85 struct uio *, int)); 86 87 int dwlpx_bus_dmamap_load_raw_direct __P((bus_dma_tag_t, bus_dmamap_t, 88 bus_dma_segment_t *, int, bus_size_t, int)); 89 int dwlpx_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 90 bus_dma_segment_t *, int, bus_size_t, int)); 91 92 void dwlpx_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 93 94 #define DWLPx_DIRECT_MAPPED_BASE 0x80000000 95 #define DWLPx_SG_MAPPED_BASE 0x10000000 96 97 void 98 dwlpx_dma_init(ccp) 99 struct dwlpx_config *ccp; 100 { 101 char *exname; 102 bus_dma_tag_t t; 103 u_int32_t *page_table; 104 int i, lim, wmask; 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 = dwlpx_dma_get_tag; 112 t->_dmamap_create = _bus_dmamap_create; 113 t->_dmamap_destroy = _bus_dmamap_destroy; 114 t->_dmamap_load = dwlpx_bus_dmamap_load_direct; 115 t->_dmamap_load_mbuf = dwlpx_bus_dmamap_load_mbuf_direct; 116 t->_dmamap_load_uio = dwlpx_bus_dmamap_load_uio_direct; 117 t->_dmamap_load_raw = dwlpx_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 = dwlpx_dma_get_tag; 133 t->_dmamap_create = dwlpx_bus_dmamap_create_sgmap; 134 t->_dmamap_destroy = dwlpx_bus_dmamap_destroy_sgmap; 135 t->_dmamap_load = dwlpx_bus_dmamap_load_sgmap; 136 t->_dmamap_load_mbuf = dwlpx_bus_dmamap_load_mbuf_sgmap; 137 t->_dmamap_load_uio = dwlpx_bus_dmamap_load_uio_sgmap; 138 t->_dmamap_load_raw = dwlpx_bus_dmamap_load_raw_sgmap; 139 t->_dmamap_unload = dwlpx_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 * A few notes about SGMAP-mapped DMA on the DWLPx: 150 * 151 * The DWLPx has PCIA-resident SRAM that is used for 152 * the SGMAP page table; there is no TLB. The DWLPA 153 * has room for 32K entries, yielding a total of 256M 154 * of sgva space. The DWLPB has 32K entries or 128K 155 * entries, depending on TBIT, yielding either 256M or 156 * 1G of sgva space. 157 * 158 * This sgva space must be shared across all windows 159 * that wish to use SGMAP-mapped DMA; make sure to 160 * adjust the "sgvabase" argument to alpha_sgmap_init() 161 * accordingly if you create more than one SGMAP-mapped 162 * window. Note that sgvabase != window base. The former 163 * is used to compute indexes into the page table only. 164 * 165 * In the current implementation the first window is a 166 * 2G window direct-mapped mapped at 2G and the second 167 * window is disabled and the third window is a 256M 168 * or 1GB scatter/gather map at 1GB. 169 */ 170 171 /* 172 * Initialize the page table. 173 */ 174 page_table = 175 (u_int32_t *)ALPHA_PHYS_TO_K0SEG(PCIA_SGMAP_PT + ccp->cc_sysbase); 176 if (ccp->cc_sc->dwlpx_sgmapsz == DWLPX_SG128K) { 177 lim = 128 * 1024; 178 wmask = PCIA_WMASK_1G; 179 } else { 180 lim = 32 * 1024; 181 wmask = PCIA_WMASK_256M; 182 } 183 for (i = 0; i < lim; i++) 184 page_table[i * SGMAP_PTE_SPACING] = 0; 185 alpha_mb(); 186 187 /* 188 * Initialize the SGMAP for window C: 189 * 190 * Size: 256M or 1GB 191 * Window base: 1GB 192 * SGVA base: 0 193 */ 194 exname = malloc(16, M_DEVBUF, M_NOWAIT); 195 if (exname == NULL) 196 panic("dwlpx_dma_init"); 197 sprintf(exname, "%s_sgmap_a", ccp->cc_sc->dwlpx_dev.dv_xname); 198 alpha_sgmap_init(t, &ccp->cc_sgmap, exname, DWLPx_SG_MAPPED_BASE, 199 0, lim * NBPG, sizeof(u_int32_t), (void *)page_table, 0); 200 201 /* 202 * Set up DMA windows for this DWLPx. 203 * 204 * Do this even for all HPCs- even for the nonexistent 205 * one on hose zero of a KFTIA. 206 */ 207 for (i = 0; i < NHPC; i++) { 208 REGVAL(PCIA_WMASK_A(i) + ccp->cc_sysbase) = PCIA_WMASK_2G; 209 REGVAL(PCIA_TBASE_A(i) + ccp->cc_sysbase) = 0; 210 REGVAL(PCIA_WBASE_A(i) + ccp->cc_sysbase) = 211 DWLPx_DIRECT_MAPPED_BASE | PCIA_WBASE_W_EN; 212 213 REGVAL(PCIA_WMASK_B(i) + ccp->cc_sysbase) = 0; 214 REGVAL(PCIA_TBASE_B(i) + ccp->cc_sysbase) = 0; 215 REGVAL(PCIA_WBASE_B(i) + ccp->cc_sysbase) = 0; 216 217 REGVAL(PCIA_WMASK_C(i) + ccp->cc_sysbase) = wmask; 218 REGVAL(PCIA_TBASE_C(i) + ccp->cc_sysbase) = 0; 219 REGVAL(PCIA_WBASE_C(i) + ccp->cc_sysbase) = 220 DWLPx_SG_MAPPED_BASE | PCIA_WBASE_W_EN | PCIA_WBASE_SG_EN; 221 alpha_mb(); 222 } 223 224 /* XXX XXX BEGIN XXX XXX */ 225 { /* XXX */ 226 extern vm_offset_t alpha_XXX_dmamap_or; /* XXX */ 227 alpha_XXX_dmamap_or = DWLPx_DIRECT_MAPPED_BASE; /* XXX */ 228 } /* XXX */ 229 /* XXX XXX END XXX XXX */ 230 } 231 232 /* 233 * Return the bus dma tag to be used for the specified bus type. 234 * INTERNAL USE ONLY! 235 */ 236 bus_dma_tag_t 237 dwlpx_dma_get_tag(t, bustype) 238 bus_dma_tag_t t; 239 alpha_bus_t bustype; 240 { 241 struct dwlpx_config *ccp = t->_cookie; 242 extern int physmem; 243 244 switch (bustype) { 245 case ALPHA_BUS_PCI: 246 case ALPHA_BUS_EISA: 247 /* 248 * As best as I can tell from the DU source, you can't 249 * do DIRECT MAPPED and S/G at the same time. 250 */ 251 #ifndef MSS3_DEBUG_SG 252 if (physmem <= btoc(2048LL << 20LL)) 253 return (&ccp->cc_dmat_direct); 254 #endif 255 /* FALLTHROUGH */ 256 257 case ALPHA_BUS_ISA: 258 /* 259 * ISA doesn't have enough address bits to use 260 * the direct-mapped DMA window, so we must use 261 * SGMAPs. 262 */ 263 return (&ccp->cc_dmat_sgmap); 264 265 default: 266 panic("dwlpx_dma_get_tag: shouldn't be here, really..."); 267 } 268 } 269 270 /* 271 * Create a DWLPx SGMAP-mapped DMA map. 272 */ 273 int 274 dwlpx_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 275 flags, dmamp) 276 bus_dma_tag_t t; 277 bus_size_t size; 278 int nsegments; 279 bus_size_t maxsegsz; 280 bus_size_t boundary; 281 int flags; 282 bus_dmamap_t *dmamp; 283 { 284 struct dwlpx_config *ccp = t->_cookie; 285 bus_dmamap_t map; 286 int error; 287 288 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 289 boundary, flags, dmamp); 290 if (error) 291 return (error); 292 293 map = *dmamp; 294 295 if (flags & BUS_DMA_ALLOCNOW) { 296 error = alpha_sgmap_alloc(map, round_page(size), 297 &ccp->cc_sgmap, flags); 298 if (error) 299 dwlpx_bus_dmamap_destroy_sgmap(t, map); 300 } 301 302 return (error); 303 } 304 305 /* 306 * Destroy a DWLPx SGMAP-mapped DMA map. 307 */ 308 void 309 dwlpx_bus_dmamap_destroy_sgmap(t, map) 310 bus_dma_tag_t t; 311 bus_dmamap_t map; 312 { 313 struct dwlpx_config *ccp = t->_cookie; 314 315 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 316 alpha_sgmap_free(map, &ccp->cc_sgmap); 317 318 _bus_dmamap_destroy(t, map); 319 } 320 321 /* 322 * Load a DWLPx direct-mapped DMA map with a linear buffer. 323 */ 324 int 325 dwlpx_bus_dmamap_load_direct(t, map, buf, buflen, p, flags) 326 bus_dma_tag_t t; 327 bus_dmamap_t map; 328 void *buf; 329 bus_size_t buflen; 330 struct proc *p; 331 int flags; 332 { 333 return (_bus_dmamap_load_direct_common(t, map, buf, buflen, p, 334 flags, DWLPx_DIRECT_MAPPED_BASE)); 335 } 336 337 /* 338 * Load a DWLPx SGMAP-mapped DMA map with a linear buffer. 339 */ 340 int 341 dwlpx_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 342 bus_dma_tag_t t; 343 bus_dmamap_t map; 344 void *buf; 345 bus_size_t buflen; 346 struct proc *p; 347 int flags; 348 { 349 struct dwlpx_config *ccp = t->_cookie; 350 351 return (pci_sgmap_pte32_load(t, map, buf, buflen, p, flags, 352 &ccp->cc_sgmap)); 353 } 354 355 /* 356 * Load a DWLPx direct-mapped DMA map with an mbuf chain. 357 */ 358 int 359 dwlpx_bus_dmamap_load_mbuf_direct(t, map, m, flags) 360 bus_dma_tag_t t; 361 bus_dmamap_t map; 362 struct mbuf *m; 363 int flags; 364 { 365 366 return (_bus_dmamap_load_mbuf_direct_common(t, map, m, 367 flags, DWLPx_DIRECT_MAPPED_BASE)); 368 } 369 370 /* 371 * Load a DWLPx SGMAP-mapped DMA map with an mbuf chain. 372 */ 373 int 374 dwlpx_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 375 bus_dma_tag_t t; 376 bus_dmamap_t map; 377 struct mbuf *m; 378 int flags; 379 { 380 struct dwlpx_config *ccp = t->_cookie; 381 382 return (pci_sgmap_pte32_load_mbuf(t, map, m, flags, &ccp->cc_sgmap)); 383 } 384 385 /* 386 * Load a DWLPx direct-mapped DMA map with a uio. 387 */ 388 int 389 dwlpx_bus_dmamap_load_uio_direct(t, map, uio, flags) 390 bus_dma_tag_t t; 391 bus_dmamap_t map; 392 struct uio *uio; 393 int flags; 394 { 395 396 return (_bus_dmamap_load_uio_direct_common(t, map, uio, 397 flags, DWLPx_DIRECT_MAPPED_BASE)); 398 } 399 400 /* 401 * Load a DWLPx SGMAP-mapped DMA map with a uio. 402 */ 403 int 404 dwlpx_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 405 bus_dma_tag_t t; 406 bus_dmamap_t map; 407 struct uio *uio; 408 int flags; 409 { 410 struct dwlpx_config *ccp = t->_cookie; 411 412 return (pci_sgmap_pte32_load_uio(t, map, uio, flags, &ccp->cc_sgmap)); 413 } 414 415 /* 416 * Load a DWLPx direct-mapped DMA map with raw memory. 417 */ 418 int 419 dwlpx_bus_dmamap_load_raw_direct(t, map, segs, nsegs, size, flags) 420 bus_dma_tag_t t; 421 bus_dmamap_t map; 422 bus_dma_segment_t *segs; 423 int nsegs; 424 bus_size_t size; 425 int flags; 426 { 427 428 return (_bus_dmamap_load_raw_direct_common(t, map, segs, nsegs, 429 size, flags, DWLPx_DIRECT_MAPPED_BASE)); 430 } 431 432 /* 433 * Load a DWLPx SGMAP-mapped DMA map with raw memory. 434 */ 435 int 436 dwlpx_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 437 bus_dma_tag_t t; 438 bus_dmamap_t map; 439 bus_dma_segment_t *segs; 440 int nsegs; 441 bus_size_t size; 442 int flags; 443 { 444 struct dwlpx_config *ccp = t->_cookie; 445 446 return (pci_sgmap_pte32_load_raw(t, map, segs, nsegs, size, flags, 447 &ccp->cc_sgmap)); 448 } 449 450 /* 451 * Unload a DWLPx DMA map. 452 */ 453 void 454 dwlpx_bus_dmamap_unload_sgmap(t, map) 455 bus_dma_tag_t t; 456 bus_dmamap_t map; 457 { 458 struct dwlpx_config *ccp = t->_cookie; 459 460 /* 461 * Invalidate any SGMAP page table entries used by this 462 * mapping. 463 */ 464 pci_sgmap_pte32_unload(t, map, &ccp->cc_sgmap); 465 466 /* 467 * Do the generic bits of the unload. 468 */ 469 _bus_dmamap_unload(t, map); 470 } 471
Indexes created Tue Oct 28 09:09:52 GMT 2025