mcpcia_dma.c revision 1.14
1 /* $NetBSD: mcpcia_dma.c,v 1.14 2001/01/03 19:16:00 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 1.14 2001/01/03 19:16:00 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 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_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 64 bus_size_t, struct proc *, int)); 65 66 int mcpcia_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 67 struct mbuf *, int)); 68 69 int mcpcia_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 70 struct uio *, int)); 71 72 int mcpcia_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 73 bus_dma_segment_t *, int, bus_size_t, int)); 74 75 void mcpcia_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 76 77 /* 78 * Direct-mapped window: 2G at 2G 79 */ 80 #define MCPCIA_DIRECT_MAPPED_BASE (2UL*1024UL*1024UL*1024UL) 81 #define MCPCIA_DIRECT_MAPPED_SIZE (2UL*1024UL*1024UL*1024UL) 82 83 /* 84 * SGMAP window for PCI: 1G at 1G 85 */ 86 #define MCPCIA_PCI_SG_MAPPED_BASE (1UL*1024UL*1024UL*1024UL) 87 #define MCPCIA_PCI_SG_MAPPED_SIZE (1UL*1024UL*1024UL*1024UL) 88 89 /* 90 * SGMAP window for ISA: 8M at 8M 91 */ 92 #define MCPCIA_ISA_SG_MAPPED_BASE (8*1024*1024) 93 #define MCPCIA_ISA_SG_MAPPED_SIZE (8*1024*1024) 94 95 #define MCPCIA_SGTLB_INVALIDATE(ccp) \ 96 do { \ 97 alpha_mb(); \ 98 REGVAL(MCPCIA_SG_TBIA(ccp)) = 0xdeadbeef; \ 99 alpha_mb(); \ 100 } while (0) 101 102 void 103 mcpcia_dma_init(ccp) 104 struct mcpcia_config *ccp; 105 { 106 bus_dma_tag_t t; 107 108 /* 109 * Initialize the DMA tag used for direct-mapped DMA. 110 */ 111 t = &ccp->cc_dmat_direct; 112 t->_cookie = ccp; 113 t->_wbase = MCPCIA_DIRECT_MAPPED_BASE; 114 t->_wsize = MCPCIA_DIRECT_MAPPED_SIZE; 115 t->_next_window = &ccp->cc_dmat_pci_sgmap; 116 t->_boundary = 0; 117 t->_sgmap = NULL; 118 t->_get_tag = mcpcia_dma_get_tag; 119 t->_dmamap_create = _bus_dmamap_create; 120 t->_dmamap_destroy = _bus_dmamap_destroy; 121 t->_dmamap_load = _bus_dmamap_load_direct; 122 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 123 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 124 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 125 t->_dmamap_unload = _bus_dmamap_unload; 126 t->_dmamap_sync = _bus_dmamap_sync; 127 128 t->_dmamem_alloc = _bus_dmamem_alloc; 129 t->_dmamem_free = _bus_dmamem_free; 130 t->_dmamem_map = _bus_dmamem_map; 131 t->_dmamem_unmap = _bus_dmamem_unmap; 132 t->_dmamem_mmap = _bus_dmamem_mmap; 133 134 /* 135 * Initialize the DMA tag used for sgmap-mapped PCI DMA. 136 */ 137 t = &ccp->cc_dmat_pci_sgmap; 138 t->_cookie = ccp; 139 t->_wbase = MCPCIA_PCI_SG_MAPPED_BASE; 140 t->_wsize = MCPCIA_PCI_SG_MAPPED_SIZE; 141 t->_next_window = NULL; 142 t->_boundary = 0; 143 t->_sgmap = &ccp->cc_pci_sgmap; 144 t->_get_tag = mcpcia_dma_get_tag; 145 t->_dmamap_create = alpha_sgmap_dmamap_create; 146 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 147 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 148 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 149 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 150 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 151 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 152 t->_dmamap_sync = _bus_dmamap_sync; 153 154 t->_dmamem_alloc = _bus_dmamem_alloc; 155 t->_dmamem_free = _bus_dmamem_free; 156 t->_dmamem_map = _bus_dmamem_map; 157 t->_dmamem_unmap = _bus_dmamem_unmap; 158 t->_dmamem_mmap = _bus_dmamem_mmap; 159 160 /* 161 * Initialize the DMA tag used for sgmap-mapped ISA DMA. 162 */ 163 t = &ccp->cc_dmat_isa_sgmap; 164 t->_cookie = ccp; 165 t->_wbase = MCPCIA_ISA_SG_MAPPED_BASE; 166 t->_wsize = MCPCIA_ISA_SG_MAPPED_SIZE; 167 t->_next_window = NULL; 168 t->_boundary = 0; 169 t->_sgmap = &ccp->cc_isa_sgmap; 170 t->_get_tag = mcpcia_dma_get_tag; 171 t->_dmamap_create = alpha_sgmap_dmamap_create; 172 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 173 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 174 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 175 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 176 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 177 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 178 t->_dmamap_sync = _bus_dmamap_sync; 179 180 t->_dmamem_alloc = _bus_dmamem_alloc; 181 t->_dmamem_free = _bus_dmamem_free; 182 t->_dmamem_map = _bus_dmamem_map; 183 t->_dmamem_unmap = _bus_dmamem_unmap; 184 t->_dmamem_mmap = _bus_dmamem_mmap; 185 186 /* 187 * Initialize the SGMAPs. 188 */ 189 alpha_sgmap_init(&ccp->cc_dmat_pci_sgmap, &ccp->cc_pci_sgmap, 190 "mcpcia pci sgmap", 191 MCPCIA_PCI_SG_MAPPED_BASE, 0, MCPCIA_PCI_SG_MAPPED_SIZE, 192 sizeof(u_int64_t), NULL, 0); 193 194 alpha_sgmap_init(&ccp->cc_dmat_isa_sgmap, &ccp->cc_isa_sgmap, 195 "mcpcia isa sgmap", 196 MCPCIA_ISA_SG_MAPPED_BASE, 0, MCPCIA_ISA_SG_MAPPED_SIZE, 197 sizeof(u_int64_t), NULL, 0); 198 199 /* 200 * Disable windows first. 201 */ 202 203 REGVAL(MCPCIA_W0_BASE(ccp)) = 0; 204 REGVAL(MCPCIA_W1_BASE(ccp)) = 0; 205 REGVAL(MCPCIA_W2_BASE(ccp)) = 0; 206 REGVAL(MCPCIA_W3_BASE(ccp)) = 0; 207 REGVAL(MCPCIA_T0_BASE(ccp)) = 0; 208 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 209 REGVAL(MCPCIA_T2_BASE(ccp)) = 0; 210 REGVAL(MCPCIA_T3_BASE(ccp)) = 0; 211 alpha_mb(); 212 213 /* 214 * Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB. 215 */ 216 REGVAL(MCPCIA_W0_MASK(ccp)) = MCPCIA_WMASK_8M; 217 REGVAL(MCPCIA_T0_BASE(ccp)) = 218 ccp->cc_isa_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 219 alpha_mb(); 220 REGVAL(MCPCIA_W0_BASE(ccp)) = 221 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_ISA_SG_MAPPED_BASE; 222 alpha_mb(); 223 224 MCPCIA_SGTLB_INVALIDATE(ccp); 225 226 /* 227 * Set up window 1 as a 2 GB Direct-mapped window starting at 2GB. 228 */ 229 230 REGVAL(MCPCIA_W1_MASK(ccp)) = MCPCIA_WMASK_2G; 231 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 232 alpha_mb(); 233 REGVAL(MCPCIA_W1_BASE(ccp)) = 234 MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN; 235 alpha_mb(); 236 237 /* 238 * Set up window 2 as a 1G SGMAP-mapped window starting at 1G. 239 */ 240 241 REGVAL(MCPCIA_W2_MASK(ccp)) = MCPCIA_WMASK_1G; 242 REGVAL(MCPCIA_T2_BASE(ccp)) = 243 ccp->cc_pci_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 244 alpha_mb(); 245 REGVAL(MCPCIA_W2_BASE(ccp)) = 246 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_PCI_SG_MAPPED_BASE; 247 alpha_mb(); 248 249 /* XXX XXX BEGIN XXX XXX */ 250 { /* XXX */ 251 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 252 alpha_XXX_dmamap_or = MCPCIA_DIRECT_MAPPED_BASE;/* XXX */ 253 } /* XXX */ 254 /* XXX XXX END XXX XXX */ 255 } 256 257 /* 258 * Return the bus dma tag to be used for the specified bus type. 259 * INTERNAL USE ONLY! 260 */ 261 bus_dma_tag_t 262 mcpcia_dma_get_tag(t, bustype) 263 bus_dma_tag_t t; 264 alpha_bus_t bustype; 265 { 266 struct mcpcia_config *ccp = t->_cookie; 267 268 switch (bustype) { 269 case ALPHA_BUS_PCI: 270 case ALPHA_BUS_EISA: 271 /* 272 * Start off using the direct-mapped window. We will 273 * automatically fall backed onto the chained PCI SGMAP 274 * window if necessary. 275 */ 276 return (&ccp->cc_dmat_direct); 277 278 case ALPHA_BUS_ISA: 279 /* 280 * ISA doesn't have enough address bits to use 281 * the direct-mapped DMA window, so we must use 282 * SGMAPs. 283 */ 284 return (&ccp->cc_dmat_isa_sgmap); 285 286 default: 287 panic("mcpcia_dma_get_tag: shouldn't be here, really..."); 288 } 289 } 290 291 /* 292 * Load a MCPCIA SGMAP-mapped DMA map with a linear buffer. 293 */ 294 int 295 mcpcia_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 296 bus_dma_tag_t t; 297 bus_dmamap_t map; 298 void *buf; 299 bus_size_t buflen; 300 struct proc *p; 301 int flags; 302 { 303 int error; 304 struct mcpcia_config *ccp = t->_cookie; 305 306 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 307 t->_sgmap); 308 if (error == 0) 309 MCPCIA_SGTLB_INVALIDATE(ccp); 310 return (error); 311 } 312 313 /* 314 * Load a MCPCIA SGMAP-mapped DMA map with an mbuf chain. 315 */ 316 int 317 mcpcia_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 318 bus_dma_tag_t t; 319 bus_dmamap_t map; 320 struct mbuf *m; 321 int flags; 322 { 323 int error; 324 struct mcpcia_config *ccp = t->_cookie; 325 326 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 327 if (error == 0) 328 MCPCIA_SGTLB_INVALIDATE(ccp); 329 return (error); 330 } 331 332 /* 333 * Load a MCPCIA SGMAP-mapped DMA map with a uio. 334 */ 335 int 336 mcpcia_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 337 bus_dma_tag_t t; 338 bus_dmamap_t map; 339 struct uio *uio; 340 int flags; 341 { 342 int error; 343 struct mcpcia_config *ccp = t->_cookie; 344 345 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 346 if (error == 0) 347 MCPCIA_SGTLB_INVALIDATE(ccp); 348 return (error); 349 } 350 351 /* 352 * Load a MCPCIA SGMAP-mapped DMA map with raw memory. 353 */ 354 int 355 mcpcia_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 356 bus_dma_tag_t t; 357 bus_dmamap_t map; 358 bus_dma_segment_t *segs; 359 int nsegs; 360 bus_size_t size; 361 int flags; 362 { 363 int error; 364 struct mcpcia_config *ccp = t->_cookie; 365 366 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 367 t->_sgmap); 368 if (error == 0) 369 MCPCIA_SGTLB_INVALIDATE(ccp); 370 return (error); 371 } 372 373 /* 374 * Unload a MCPCIA DMA map. 375 */ 376 void 377 mcpcia_bus_dmamap_unload_sgmap(t, map) 378 bus_dma_tag_t t; 379 bus_dmamap_t map; 380 { 381 struct mcpcia_config *ccp = t->_cookie; 382 383 /* 384 * Invalidate any SGMAP page table entries used by this mapping. 385 */ 386 pci_sgmap_pte64_unload(t, map, t->_sgmap); 387 MCPCIA_SGTLB_INVALIDATE(ccp); 388 389 /* 390 * Do the generic bits of the unload. 391 */ 392 _bus_dmamap_unload(t, map); 393 } 394
Indexes created Tue Sep 30 20:09:53 GMT 2025