1/* $OpenBSD: mcpcia_dma.c,v 1.5 2014/06/14 23:11:20 jmatthew Exp $ */ 2/* $NetBSD: mcpcia_dma.c,v 1.15 2001/07/19 18:55:40 thorpej Exp $ */ 3 4/*- 5 * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe and Matthew Jacob of the Numerical Aerospace Simulation 10 * Facility, NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#define _ALPHA_BUS_DMA_PRIVATE 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/kernel.h> 39#include <sys/device.h> 40#include <sys/malloc.h> 41 42#include <uvm/uvm_extern.h> 43 44#include <machine/bus.h> 45#include <machine/rpb.h> 46 47#include <dev/pci/pcireg.h> 48#include <dev/pci/pcivar.h> 49#include <alpha/pci/mcpciareg.h> 50#include <alpha/pci/mcpciavar.h> 51#include <alpha/pci/pci_kn300.h> 52 53bus_dma_tag_t mcpcia_dma_get_tag (bus_dma_tag_t, alpha_bus_t); 54 55int mcpcia_bus_dmamap_load_sgmap (bus_dma_tag_t, bus_dmamap_t, void *, 56 bus_size_t, struct proc *, int); 57 58int mcpcia_bus_dmamap_load_mbuf_sgmap (bus_dma_tag_t, bus_dmamap_t, 59 struct mbuf *, int); 60 61int mcpcia_bus_dmamap_load_uio_sgmap (bus_dma_tag_t, bus_dmamap_t, 62 struct uio *, int); 63 64int mcpcia_bus_dmamap_load_raw_sgmap (bus_dma_tag_t, bus_dmamap_t, 65 bus_dma_segment_t *, int, bus_size_t, int); 66 67void mcpcia_bus_dmamap_unload_sgmap (bus_dma_tag_t, bus_dmamap_t); 68 69/* 70 * Direct-mapped window: 2G at 2G 71 */ 72#define MCPCIA_DIRECT_MAPPED_BASE (2UL*1024UL*1024UL*1024UL) 73#define MCPCIA_DIRECT_MAPPED_SIZE (2UL*1024UL*1024UL*1024UL) 74 75/* 76 * SGMAP window for PCI: 1G at 1G 77 */ 78#define MCPCIA_PCI_SG_MAPPED_BASE (1UL*1024UL*1024UL*1024UL) 79#define MCPCIA_PCI_SG_MAPPED_SIZE (1UL*1024UL*1024UL*1024UL) 80 81/* 82 * SGMAP window for ISA: 8M at 8M 83 */ 84#define MCPCIA_ISA_SG_MAPPED_BASE (8*1024*1024) 85#define MCPCIA_ISA_SG_MAPPED_SIZE (8*1024*1024) 86 87#define MCPCIA_SGTLB_INVALIDATE(ccp) \ 88do { \ 89 alpha_mb(); \ 90 REGVAL(MCPCIA_SG_TBIA(ccp)) = 0xdeadbeef; \ 91 alpha_mb(); \ 92} while (0) 93 94void 95mcpcia_dma_init(ccp) 96 struct mcpcia_config *ccp; 97{ 98 bus_dma_tag_t t; 99 100 /* 101 * Initialize the DMA tag used for direct-mapped DMA. 102 */ 103 t = &ccp->cc_dmat_direct; 104 t->_cookie = ccp; 105 t->_wbase = MCPCIA_DIRECT_MAPPED_BASE; 106 t->_wsize = MCPCIA_DIRECT_MAPPED_SIZE; 107 t->_next_window = &ccp->cc_dmat_pci_sgmap; 108 t->_boundary = 0; 109 t->_sgmap = NULL; 110 t->_get_tag = mcpcia_dma_get_tag; 111 /* 112 * Since we fall back to sgmap if the direct mapping fails, 113 * we need to set up for sgmap in any case. 114 */ 115 t->_dmamap_create = alpha_sgmap_dmamap_create; 116 t->_dmamap_destroy = alpha_sgmap_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->_get_tag = mcpcia_dma_get_tag; 141 t->_dmamap_create = alpha_sgmap_dmamap_create; 142 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 143 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 144 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 145 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 146 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 147 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 148 t->_dmamap_sync = _bus_dmamap_sync; 149 150 t->_dmamem_alloc = _bus_dmamem_alloc; 151 t->_dmamem_free = _bus_dmamem_free; 152 t->_dmamem_map = _bus_dmamem_map; 153 t->_dmamem_unmap = _bus_dmamem_unmap; 154 t->_dmamem_mmap = _bus_dmamem_mmap; 155 156 /* 157 * Initialize the DMA tag used for sgmap-mapped ISA DMA. 158 */ 159 t = &ccp->cc_dmat_isa_sgmap; 160 t->_cookie = ccp; 161 t->_wbase = MCPCIA_ISA_SG_MAPPED_BASE; 162 t->_wsize = MCPCIA_ISA_SG_MAPPED_SIZE; 163 t->_next_window = NULL; 164 t->_boundary = 0; 165 t->_sgmap = &ccp->cc_isa_sgmap; 166 t->_get_tag = mcpcia_dma_get_tag; 167 t->_dmamap_create = alpha_sgmap_dmamap_create; 168 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 169 t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; 170 t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; 171 t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; 172 t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; 173 t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; 174 t->_dmamap_sync = _bus_dmamap_sync; 175 176 t->_dmamem_alloc = _bus_dmamem_alloc; 177 t->_dmamem_free = _bus_dmamem_free; 178 t->_dmamem_map = _bus_dmamem_map; 179 t->_dmamem_unmap = _bus_dmamem_unmap; 180 t->_dmamem_mmap = _bus_dmamem_mmap; 181 182 /* 183 * Initialize the SGMAPs. 184 */ 185 alpha_sgmap_init(&ccp->cc_dmat_pci_sgmap, &ccp->cc_pci_sgmap, 186 "mcpcia pci sgmap", 187 MCPCIA_PCI_SG_MAPPED_BASE, 0, MCPCIA_PCI_SG_MAPPED_SIZE, 188 sizeof(u_int64_t), NULL, 0); 189 190 alpha_sgmap_init(&ccp->cc_dmat_isa_sgmap, &ccp->cc_isa_sgmap, 191 "mcpcia isa sgmap", 192 MCPCIA_ISA_SG_MAPPED_BASE, 0, MCPCIA_ISA_SG_MAPPED_SIZE, 193 sizeof(u_int64_t), NULL, 0); 194 195 /* 196 * Disable windows first. 197 */ 198 REGVAL(MCPCIA_W0_BASE(ccp)) = 0; 199 REGVAL(MCPCIA_W1_BASE(ccp)) = 0; 200 REGVAL(MCPCIA_W2_BASE(ccp)) = 0; 201 REGVAL(MCPCIA_W3_BASE(ccp)) = 0; 202 REGVAL(MCPCIA_T0_BASE(ccp)) = 0; 203 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 204 REGVAL(MCPCIA_T2_BASE(ccp)) = 0; 205 REGVAL(MCPCIA_T3_BASE(ccp)) = 0; 206 alpha_mb(); 207 208 /* 209 * Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB. 210 */ 211 REGVAL(MCPCIA_W0_MASK(ccp)) = MCPCIA_WMASK_8M; 212 REGVAL(MCPCIA_T0_BASE(ccp)) = 213 ccp->cc_isa_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 214 alpha_mb(); 215 REGVAL(MCPCIA_W0_BASE(ccp)) = 216 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_ISA_SG_MAPPED_BASE; 217 alpha_mb(); 218 219 MCPCIA_SGTLB_INVALIDATE(ccp); 220 221 /* 222 * Set up window 1 as a 2 GB Direct-mapped window starting at 2GB. 223 */ 224 REGVAL(MCPCIA_W1_MASK(ccp)) = MCPCIA_WMASK_2G; 225 REGVAL(MCPCIA_T1_BASE(ccp)) = 0; 226 alpha_mb(); 227 REGVAL(MCPCIA_W1_BASE(ccp)) = 228 MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN; 229 alpha_mb(); 230 231 /* 232 * Set up window 2 as a 1G SGMAP-mapped window starting at 1G. 233 */ 234 REGVAL(MCPCIA_W2_MASK(ccp)) = MCPCIA_WMASK_1G; 235 REGVAL(MCPCIA_T2_BASE(ccp)) = 236 ccp->cc_pci_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; 237 alpha_mb(); 238 REGVAL(MCPCIA_W2_BASE(ccp)) = 239 MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_PCI_SG_MAPPED_BASE; 240 alpha_mb(); 241 242 /* XXX XXX BEGIN XXX XXX */ 243 { /* XXX */ 244 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 245 alpha_XXX_dmamap_or = MCPCIA_DIRECT_MAPPED_BASE;/* XXX */ 246 } /* XXX */ 247 /* XXX XXX END XXX XXX */ 248} 249 250/* 251 * Return the bus dma tag to be used for the specified bus type. 252 * INTERNAL USE ONLY! 253 */ 254bus_dma_tag_t 255mcpcia_dma_get_tag(t, bustype) 256 bus_dma_tag_t t; 257 alpha_bus_t bustype; 258{ 259 struct mcpcia_config *ccp = t->_cookie; 260 261 switch (bustype) { 262 case ALPHA_BUS_PCI: 263 case ALPHA_BUS_EISA: 264 /* 265 * Start off using the direct-mapped window. We will 266 * automatically fall backed onto the chained PCI SGMAP 267 * window if necessary. 268 */ 269 return (&ccp->cc_dmat_direct); 270 271 case ALPHA_BUS_ISA: 272 /* 273 * ISA doesn't have enough address bits to use 274 * the direct-mapped DMA window, so we must use 275 * SGMAPs. 276 */ 277 return (&ccp->cc_dmat_isa_sgmap); 278 279 default: 280 panic("mcpcia_dma_get_tag: shouldn't be here, really..."); 281 } 282} 283 284/* 285 * Load a MCPCIA SGMAP-mapped DMA map with a linear buffer. 286 */ 287int 288mcpcia_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 289 bus_dma_tag_t t; 290 bus_dmamap_t map; 291 void *buf; 292 bus_size_t buflen; 293 struct proc *p; 294 int flags; 295{ 296 int error; 297 struct mcpcia_config *ccp = t->_cookie; 298 299 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 300 t->_sgmap); 301 if (error == 0) 302 MCPCIA_SGTLB_INVALIDATE(ccp); 303 return (error); 304} 305 306/* 307 * Load a MCPCIA SGMAP-mapped DMA map with an mbuf chain. 308 */ 309int 310mcpcia_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 311 bus_dma_tag_t t; 312 bus_dmamap_t map; 313 struct mbuf *m; 314 int flags; 315{ 316 int error; 317 struct mcpcia_config *ccp = t->_cookie; 318 319 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 320 if (error == 0) 321 MCPCIA_SGTLB_INVALIDATE(ccp); 322 return (error); 323} 324 325/* 326 * Load a MCPCIA SGMAP-mapped DMA map with a uio. 327 */ 328int 329mcpcia_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 330 bus_dma_tag_t t; 331 bus_dmamap_t map; 332 struct uio *uio; 333 int flags; 334{ 335 int error; 336 struct mcpcia_config *ccp = t->_cookie; 337 338 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 339 if (error == 0) 340 MCPCIA_SGTLB_INVALIDATE(ccp); 341 return (error); 342} 343 344/* 345 * Load a MCPCIA SGMAP-mapped DMA map with raw memory. 346 */ 347int 348mcpcia_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 349 bus_dma_tag_t t; 350 bus_dmamap_t map; 351 bus_dma_segment_t *segs; 352 int nsegs; 353 bus_size_t size; 354 int flags; 355{ 356 int error; 357 struct mcpcia_config *ccp = t->_cookie; 358 359 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 360 t->_sgmap); 361 if (error == 0) 362 MCPCIA_SGTLB_INVALIDATE(ccp); 363 return (error); 364} 365 366/* 367 * Unload a MCPCIA DMA map. 368 */ 369void 370mcpcia_bus_dmamap_unload_sgmap(t, map) 371 bus_dma_tag_t t; 372 bus_dmamap_t map; 373{ 374 struct mcpcia_config *ccp = t->_cookie; 375 376 /* 377 * Invalidate any SGMAP page table entries used by this mapping. 378 */ 379 pci_sgmap_pte64_unload(t, map, t->_sgmap); 380 MCPCIA_SGTLB_INVALIDATE(ccp); 381 382 /* 383 * Do the generic bits of the unload. 384 */ 385 _bus_dmamap_unload(t, map); 386} 387