mcpcia_dma.c revision 1.17
1 /* $NetBSD: mcpcia_dma.c,v 1.17 2009/03/14 14:45:53 dsl 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 35 __KERNEL_RCSID(0, "$NetBSD: mcpcia_dma.c,v 1.17 2009/03/14 14:45:53 dsl Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 #include <sys/malloc.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #define _ALPHA_BUS_DMA_PRIVATE 46 #include <machine/bus.h> 47 48 #include <dev/pci/pcireg.h> 49 #include <dev/pci/pcivar.h> 50 #include <alpha/pci/mcpciareg.h> 51 #include <alpha/pci/mcpciavar.h> 52 #include <alpha/pci/pci_kn300.h> 53 54 bus_dma_tag_t mcpcia_dma_get_tag(bus_dma_tag_t, alpha_bus_t); 55 56 int mcpcia_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 57 bus_size_t, struct proc *, int); 58 59 int mcpcia_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 60 struct mbuf *, int); 61 62 int mcpcia_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 63 struct uio *, int); 64 65 int mcpcia_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 66 bus_dma_segment_t *, int, bus_size_t, int); 67 68 void mcpcia_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 69 70 /* 71 * Direct-mapped window: 2G at 2G 72 */ 73 #define MCPCIA_DIRECT_MAPPED_BASE (2UL*1024UL*1024UL*1024UL) 74 #define MCPCIA_DIRECT_MAPPED_SIZE (2UL*1024UL*1024UL*1024UL) 75 76 /* 77 * SGMAP window for PCI: 1G at 1G 78 */ 79 #define MCPCIA_PCI_SG_MAPPED_BASE (1UL*1024UL*1024UL*1024UL) 80 #define MCPCIA_PCI_SG_MAPPED_SIZE (1UL*1024UL*1024UL*1024UL) 81 82 /* 83 * SGMAP window for ISA: 8M at 8M 84 */ 85 #define MCPCIA_ISA_SG_MAPPED_BASE (8*1024*1024) 86 #define MCPCIA_ISA_SG_MAPPED_SIZE (8*1024*1024) 87 88 /* MCPCIA has a 256-byte out-bound DMA prefetch threshold. */ 89 #define MCPCIA_SG_MAPPED_PFTHRESH 256 90 91 #define MCPCIA_SGTLB_INVALIDATE(ccp) \ 92 do { \ 93 alpha_mb(); \ 94 REGVAL(MCPCIA_SG_TBIA(ccp)) = 0xdeadbeef; \ 95 alpha_mb(); \ 96 } while (0) 97 98 void 99 mcpcia_dma_init(ccp) 100 struct mcpcia_config *ccp; 101 { 102 bus_dma_tag_t t; 103 104 /* 105 * Initialize the DMA tag used for direct-mapped DMA. 106 */ 107 t = &ccp->cc_dmat_direct; 108 t->_cookie = ccp; 109 t->_wbase = MCPCIA_DIRECT_MAPPED_BASE; 110 t->_wsize = MCPCIA_DIRECT_MAPPED_SIZE; 111 t->_next_window = &ccp->cc_dmat_pci_sgmap; 112 t->_boundary = 0; 113 t->_sgmap = NULL; 114 t->_get_tag = mcpcia_dma_get_tag; 115 t->_dmamap_create = _bus_dmamap_create; 116 t->_dmamap_destroy = _bus_dmamap_destroy; 117 t->_dmamap_load = _bus_dmamap_load_direct; 118 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 119 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 120 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 121 t->_dmamap_unload = _bus_dmamap_unload; 122 t->_dmamap_sync = _bus_dmamap_sync; 123 124 t->_dmamem_alloc = _bus_dmamem_alloc; 125 t->_dmamem_free = _bus_dmamem_free; 126 t->_dmamem_map = _bus_dmamem_map; 127 t->_dmamem_unmap = _bus_dmamem_unmap; 128 t->_dmamem_mmap = _bus_dmamem_mmap; 129 130 /* 131 * Initialize the DMA tag used for sgmap-mapped PCI DMA. 132 */ 133 t = &ccp->cc_dmat_pci_sgmap; 134 t->_cookie = ccp; 135 t->_wbase = MCPCIA_PCI_SG_MAPPED_BASE; 136 t->_wsize = MCPCIA_PCI_SG_MAPPED_SIZE; 137 t->_next_window = NULL; 138 t->_boundary = 0; 139 t->_sgmap = &ccp->cc_pci_sgmap; 140 t->_pfthresh = MCPCIA_SG_MAPPED_PFTHRESH; 141 t->_get_tag = mcpcia_dma_get_tag; 142 t->_dmamap_create = alpha_sgmap_dmamap_create; 143 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 144 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 145 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 146 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 147 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 148 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 149 t->_dmamap_sync = _bus_dmamap_sync; 150 151 t->_dmamem_alloc = _bus_dmamem_alloc; 152 t->_dmamem_free = _bus_dmamem_free; 153 t->_dmamem_map = _bus_dmamem_map; 154 t->_dmamem_unmap = _bus_dmamem_unmap; 155 t->_dmamem_mmap = _bus_dmamem_mmap; 156 157 /* 158 * Initialize the DMA tag used for sgmap-mapped ISA DMA. 159 */ 160 t = &ccp->cc_dmat_isa_sgmap; 161 t->_cookie = ccp; 162 t->_wbase = MCPCIA_ISA_SG_MAPPED_BASE; 163 t->_wsize = MCPCIA_ISA_SG_MAPPED_SIZE; 164 t->_next_window = NULL; 165 t->_boundary = 0; 166 t->_sgmap = &ccp->cc_isa_sgmap; 167 t->_pfthresh = MCPCIA_SG_MAPPED_PFTHRESH; 168 t->_get_tag = mcpcia_dma_get_tag; 169 t->_dmamap_create = alpha_sgmap_dmamap_create; 170 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 171 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 172 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 173 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 174 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 175 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 176 t->_dmamap_sync = _bus_dmamap_sync; 177 178 t->_dmamem_alloc = _bus_dmamem_alloc; 179 t->_dmamem_free = _bus_dmamem_free; 180 t->_dmamem_map = _bus_dmamem_map; 181 t->_dmamem_unmap = _bus_dmamem_unmap; 182 t->_dmamem_mmap = _bus_dmamem_mmap; 183 184 /* 185 * Initialize the SGMAPs. 186 */ 187 alpha_sgmap_init(&ccp->cc_dmat_pci_sgmap, &ccp->cc_pci_sgmap, 188 "mcpcia pci sgmap", 189 MCPCIA_PCI_SG_MAPPED_BASE, 0, MCPCIA_PCI_SG_MAPPED_SIZE, 190 sizeof(u_int64_t), NULL, 0); 191 192 alpha_sgmap_init(&ccp->cc_dmat_isa_sgmap, &ccp->cc_isa_sgmap, 193 "mcpcia isa sgmap", 194 MCPCIA_ISA_SG_MAPPED_BASE, 0, MCPCIA_ISA_SG_MAPPED_SIZE, 195 sizeof(u_int64_t), NULL, 0); 196 197 /* 198 * Disable windows first. 199 */ 200 201 REGVAL(MCPCIA_W0_BASE(ccp)) = 0; 202 REGVAL(MCPCIA_W1_BASE(ccp)) = 0; 203 REGVAL(MCPCIA_W2_BASE(ccp)) = 0; 204 REGVAL(MCPCIA_W3_BASE(ccp)) = 0; 205 REGVAL(MCPCIA_T0_BASE(ccp)) = 0; 206 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 207 REGVAL(MCPCIA_T2_BASE(ccp)) = 0; 208 REGVAL(MCPCIA_T3_BASE(ccp)) = 0; 209 alpha_mb(); 210 211 /* 212 * Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB. 213 */ 214 REGVAL(MCPCIA_W0_MASK(ccp)) = MCPCIA_WMASK_8M; 215 REGVAL(MCPCIA_T0_BASE(ccp)) = 216 ccp->cc_isa_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 217 alpha_mb(); 218 REGVAL(MCPCIA_W0_BASE(ccp)) = 219 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_ISA_SG_MAPPED_BASE; 220 alpha_mb(); 221 222 MCPCIA_SGTLB_INVALIDATE(ccp); 223 224 /* 225 * Set up window 1 as a 2 GB Direct-mapped window starting at 2GB. 226 */ 227 228 REGVAL(MCPCIA_W1_MASK(ccp)) = MCPCIA_WMASK_2G; 229 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 230 alpha_mb(); 231 REGVAL(MCPCIA_W1_BASE(ccp)) = 232 MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN; 233 alpha_mb(); 234 235 /* 236 * Set up window 2 as a 1G SGMAP-mapped window starting at 1G. 237 */ 238 239 REGVAL(MCPCIA_W2_MASK(ccp)) = MCPCIA_WMASK_1G; 240 REGVAL(MCPCIA_T2_BASE(ccp)) = 241 ccp->cc_pci_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 242 alpha_mb(); 243 REGVAL(MCPCIA_W2_BASE(ccp)) = 244 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_PCI_SG_MAPPED_BASE; 245 alpha_mb(); 246 247 /* XXX XXX BEGIN XXX XXX */ 248 { /* XXX */ 249 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 250 alpha_XXX_dmamap_or = MCPCIA_DIRECT_MAPPED_BASE;/* XXX */ 251 } /* XXX */ 252 /* XXX XXX END XXX XXX */ 253 } 254 255 /* 256 * Return the bus dma tag to be used for the specified bus type. 257 * INTERNAL USE ONLY! 258 */ 259 bus_dma_tag_t 260 mcpcia_dma_get_tag(t, bustype) 261 bus_dma_tag_t t; 262 alpha_bus_t bustype; 263 { 264 struct mcpcia_config *ccp = t->_cookie; 265 266 switch (bustype) { 267 case ALPHA_BUS_PCI: 268 case ALPHA_BUS_EISA: 269 /* 270 * Start off using the direct-mapped window. We will 271 * automatically fall backed onto the chained PCI SGMAP 272 * window if necessary. 273 */ 274 return (&ccp->cc_dmat_direct); 275 276 case ALPHA_BUS_ISA: 277 /* 278 * ISA doesn't have enough address bits to use 279 * the direct-mapped DMA window, so we must use 280 * SGMAPs. 281 */ 282 return (&ccp->cc_dmat_isa_sgmap); 283 284 default: 285 panic("mcpcia_dma_get_tag: shouldn't be here, really..."); 286 } 287 } 288 289 /* 290 * Load a MCPCIA SGMAP-mapped DMA map with a linear buffer. 291 */ 292 int 293 mcpcia_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 294 bus_dma_tag_t t; 295 bus_dmamap_t map; 296 void *buf; 297 bus_size_t buflen; 298 struct proc *p; 299 int flags; 300 { 301 int error; 302 struct mcpcia_config *ccp = t->_cookie; 303 304 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 305 t->_sgmap); 306 if (error == 0) 307 MCPCIA_SGTLB_INVALIDATE(ccp); 308 return (error); 309 } 310 311 /* 312 * Load a MCPCIA SGMAP-mapped DMA map with an mbuf chain. 313 */ 314 int 315 mcpcia_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 316 bus_dma_tag_t t; 317 bus_dmamap_t map; 318 struct mbuf *m; 319 int flags; 320 { 321 int error; 322 struct mcpcia_config *ccp = t->_cookie; 323 324 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 325 if (error == 0) 326 MCPCIA_SGTLB_INVALIDATE(ccp); 327 return (error); 328 } 329 330 /* 331 * Load a MCPCIA SGMAP-mapped DMA map with a uio. 332 */ 333 int 334 mcpcia_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 335 bus_dma_tag_t t; 336 bus_dmamap_t map; 337 struct uio *uio; 338 int flags; 339 { 340 int error; 341 struct mcpcia_config *ccp = t->_cookie; 342 343 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 344 if (error == 0) 345 MCPCIA_SGTLB_INVALIDATE(ccp); 346 return (error); 347 } 348 349 /* 350 * Load a MCPCIA SGMAP-mapped DMA map with raw memory. 351 */ 352 int 353 mcpcia_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 354 bus_dma_tag_t t; 355 bus_dmamap_t map; 356 bus_dma_segment_t *segs; 357 int nsegs; 358 bus_size_t size; 359 int flags; 360 { 361 int error; 362 struct mcpcia_config *ccp = t->_cookie; 363 364 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 365 t->_sgmap); 366 if (error == 0) 367 MCPCIA_SGTLB_INVALIDATE(ccp); 368 return (error); 369 } 370 371 /* 372 * Unload a MCPCIA DMA map. 373 */ 374 void 375 mcpcia_bus_dmamap_unload_sgmap(t, map) 376 bus_dma_tag_t t; 377 bus_dmamap_t map; 378 { 379 struct mcpcia_config *ccp = t->_cookie; 380 381 /* 382 * Invalidate any SGMAP page table entries used by this mapping. 383 */ 384 pci_sgmap_pte64_unload(t, map, t->_sgmap); 385 MCPCIA_SGTLB_INVALIDATE(ccp); 386 387 /* 388 * Do the generic bits of the unload. 389 */ 390 _bus_dmamap_unload(t, map); 391 } 392
Indexes created Tue Sep 30 11:09:46 GMT 2025