1 /* $NetBSD: tsp_dma.c,v 1.4 2001/07/19 19:09:22 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 by Ross Harvey. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Ross Harvey. 17 * 4. The name of Ross Harvey may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS 21 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE 23 * ARE DISCLAIMED. IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY 24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 /*- 35 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 36 * All rights reserved. 37 * 38 * This code is derived from software contributed to The NetBSD Foundation 39 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 40 * NASA Ames Research Center. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the NetBSD 53 * Foundation, Inc. and its contributors. 54 * 4. Neither the name of The NetBSD Foundation nor the names of its 55 * contributors may be used to endorse or promote products derived 56 * from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 68 * POSSIBILITY OF SUCH DAMAGE. 69 */ 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/kernel.h> 74 #include <sys/device.h> 75 #include <sys/malloc.h> 76 77 #include <uvm/uvm_extern.h> 78 79 #include <machine/autoconf.h> 80 #define _ALPHA_BUS_DMA_PRIVATE 81 #include <machine/bus.h> 82 #include <machine/rpb.h> 83 84 #include <dev/pci/pcireg.h> 85 #include <dev/pci/pcivar.h> 86 #include <alpha/pci/tsreg.h> 87 #include <alpha/pci/tsvar.h> 88 89 #define tsp_dma() { Generate ctags(1) key. } 90 91 #define EDIFF(a, b) (((a) | WSBA_ENA | WSBA_SG) != ((b) | WSBA_ENA | WSBA_SG)) 92 93 bus_dma_tag_t tsp_dma_get_tag __P((bus_dma_tag_t, alpha_bus_t)); 94 95 int tsp_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 96 bus_size_t, struct proc *, int)); 97 98 int tsp_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 99 struct mbuf *, int)); 100 101 int tsp_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 102 struct uio *, int)); 103 104 int tsp_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 105 bus_dma_segment_t *, int, bus_size_t, int)); 106 107 void tsp_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 108 109 void tsp_tlb_invalidate __P((struct tsp_config *)); 110 111 /* 112 * XXX Need to figure out what this is, if any. Initialize it to 113 * XXX something that should be safe. 114 */ 115 #define TSP_SGMAP_PFTHRESH 256 116 117 void 118 tsp_dma_init(pcp) 119 struct tsp_config *pcp; 120 { 121 int i; 122 bus_dma_tag_t t; 123 struct ts_pchip *pccsr = pcp->pc_csr; 124 bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase; 125 static struct map_expected { 126 u_int32_t base, mask, enables; 127 } premap[4] = { 128 { 0x800000, 0x700000, WSBA_ENA | WSBA_SG }, 129 { 0x80000000 | WSBA_ENA, 0x3ff00000, WSBA_ENA }, 130 { 0, 0 }, 131 { 0, 0 } 132 }; 133 134 alpha_mb(); 135 for(i = 0; i < 4; ++i) { 136 if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) || 137 EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask)) 138 printf("tsp%d: window %d: %lx/base %lx/mask %lx" 139 " reinitialized\n", 140 pcp->pc_pslot, i, 141 pccsr->tsp_wsba[i].tsg_r, 142 pccsr->tsp_wsm[i].tsg_r, 143 pccsr->tsp_tba[i].tsg_r); 144 pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables; 145 pccsr->tsp_wsm[i].tsg_r = premap[i].mask; 146 } 147 alpha_mb(); 148 149 /* 150 * Initialize the DMA tag used for direct-mapped DMA. 151 */ 152 t = &pcp->pc_dmat_direct; 153 t->_cookie = pcp; 154 t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r); 155 t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r); 156 t->_next_window = &pcp->pc_dmat_sgmap; 157 t->_boundary = 0; 158 t->_sgmap = NULL; 159 t->_get_tag = tsp_dma_get_tag; 160 t->_dmamap_create = _bus_dmamap_create; 161 t->_dmamap_destroy = _bus_dmamap_destroy; 162 t->_dmamap_load = _bus_dmamap_load_direct; 163 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 164 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 165 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 166 t->_dmamap_unload = _bus_dmamap_unload; 167 t->_dmamap_sync = _bus_dmamap_sync; 168 169 t->_dmamem_alloc = _bus_dmamem_alloc; 170 t->_dmamem_free = _bus_dmamem_free; 171 t->_dmamem_map = _bus_dmamem_map; 172 t->_dmamem_unmap = _bus_dmamem_unmap; 173 t->_dmamem_mmap = _bus_dmamem_mmap; 174 175 /* 176 * Initialize the DMA tag used for sgmap-mapped DMA. 177 */ 178 t = &pcp->pc_dmat_sgmap; 179 t->_cookie = pcp; 180 t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r); 181 t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r); 182 t->_next_window = NULL; 183 t->_boundary = 0; 184 t->_sgmap = &pcp->pc_sgmap; 185 t->_pfthresh = TSP_SGMAP_PFTHRESH; 186 t->_get_tag = tsp_dma_get_tag; 187 t->_dmamap_create = alpha_sgmap_dmamap_create; 188 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 189 t->_dmamap_load = tsp_bus_dmamap_load_sgmap; 190 t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap; 191 t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap; 192 t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap; 193 t->_dmamap_unload = tsp_bus_dmamap_unload_sgmap; 194 t->_dmamap_sync = _bus_dmamap_sync; 195 196 t->_dmamem_alloc = _bus_dmamem_alloc; 197 t->_dmamem_free = _bus_dmamem_free; 198 t->_dmamem_map = _bus_dmamem_map; 199 t->_dmamem_unmap = _bus_dmamem_unmap; 200 t->_dmamem_mmap = _bus_dmamem_mmap; 201 202 /* 203 * Initialize the SGMAP. Align page table to 32k in case 204 * window is somewhat larger than expected. 205 */ 206 alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap", 207 sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024)); 208 209 /* 210 * Enable window 0 and enable SG PTE mapping. 211 */ 212 alpha_mb(); 213 pccsr->tsp_wsba[0].tsg_r |= WSBA_SG | WSBA_ENA; 214 alpha_mb(); 215 216 /* 217 * Check windows for sanity, especially if we later decide to 218 * use the firmware's initialization in some cases. 219 */ 220 if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) || 221 (dwbase <= sgwbase && sgwbase < dwbase + dwlen)) 222 panic("tsp_dma_init: overlap"); 223 224 tbase = pcp->pc_sgmap.aps_ptpa; 225 if (tbase & ~0x7fffffc00UL) 226 panic("tsp_dma_init: bad page table address"); 227 alpha_mb(); 228 pccsr->tsp_tba[0].tsg_r = tbase; 229 alpha_mb(); 230 231 tsp_tlb_invalidate(pcp); 232 alpha_mb(); 233 234 /* XXX XXX BEGIN XXX XXX */ 235 { /* XXX */ 236 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 237 alpha_XXX_dmamap_or = dwbase; /* XXX */ 238 } /* XXX */ 239 /* XXX XXX END XXX XXX */ 240 } 241 242 /* 243 * Return the bus dma tag to be used for the specified bus type. 244 * INTERNAL USE ONLY! 245 */ 246 bus_dma_tag_t 247 tsp_dma_get_tag(t, bustype) 248 bus_dma_tag_t t; 249 alpha_bus_t bustype; 250 { 251 struct tsp_config *pcp = t->_cookie; 252 253 switch (bustype) { 254 case ALPHA_BUS_PCI: 255 case ALPHA_BUS_EISA: 256 /* 257 * The direct mapped window will work for most systems, 258 * most of the time. When it doesn't, we chain to the sgmap 259 * window automatically. 260 */ 261 return (&pcp->pc_dmat_direct); 262 263 case ALPHA_BUS_ISA: 264 /* 265 * ISA doesn't have enough address bits to use 266 * the direct-mapped DMA window, so we must use 267 * SGMAPs. 268 */ 269 return (&pcp->pc_dmat_sgmap); 270 271 default: 272 panic("tsp_dma_get_tag: shouldn't be here, really..."); 273 } 274 } 275 276 /* 277 * Load a TSP SGMAP-mapped DMA map with a linear buffer. 278 */ 279 int 280 tsp_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 281 bus_dma_tag_t t; 282 bus_dmamap_t map; 283 void *buf; 284 bus_size_t buflen; 285 struct proc *p; 286 int flags; 287 { 288 int error; 289 290 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 291 t->_sgmap); 292 if (error == 0) 293 tsp_tlb_invalidate(t->_cookie); 294 295 return (error); 296 } 297 298 /* 299 * Load a TSP SGMAP-mapped DMA map with an mbuf chain. 300 */ 301 int 302 tsp_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 303 bus_dma_tag_t t; 304 bus_dmamap_t map; 305 struct mbuf *m; 306 int flags; 307 { 308 int error; 309 310 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 311 if (error == 0) 312 tsp_tlb_invalidate(t->_cookie); 313 314 return (error); 315 } 316 317 /* 318 * Load a TSP SGMAP-mapped DMA map with a uio. 319 */ 320 int 321 tsp_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 322 bus_dma_tag_t t; 323 bus_dmamap_t map; 324 struct uio *uio; 325 int flags; 326 { 327 int error; 328 329 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 330 if (error == 0) 331 tsp_tlb_invalidate(t->_cookie); 332 333 return (error); 334 } 335 336 /* 337 * Load a TSP SGMAP-mapped DMA map with raw memory. 338 */ 339 int 340 tsp_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 341 bus_dma_tag_t t; 342 bus_dmamap_t map; 343 bus_dma_segment_t *segs; 344 int nsegs; 345 bus_size_t size; 346 int flags; 347 { 348 int error; 349 350 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 351 t->_sgmap); 352 if (error == 0) 353 tsp_tlb_invalidate(t->_cookie); 354 355 return (error); 356 } 357 358 /* 359 * Unload a TSP DMA map. 360 */ 361 void 362 tsp_bus_dmamap_unload_sgmap(t, map) 363 bus_dma_tag_t t; 364 bus_dmamap_t map; 365 { 366 367 /* 368 * Invalidate any SGMAP page table entries used by this 369 * mapping. 370 */ 371 pci_sgmap_pte64_unload(t, map, t->_sgmap); 372 tsp_tlb_invalidate(t->_cookie); 373 374 /* 375 * Do the generic bits of the unload. 376 */ 377 _bus_dmamap_unload(t, map); 378 } 379 380 /* 381 * Flush the TSP scatter/gather TLB. 382 */ 383 void 384 tsp_tlb_invalidate(pcp) 385 struct tsp_config *pcp; 386 { 387 388 alpha_mb(); 389 pcp->pc_csr->tsp_tlbia.tsg_r = 0; 390 alpha_mb(); 391 } 392