tsp_dma.c revision 1.3
1 /* $NetBSD: tsp_dma.c,v 1.3 2001/01/03 19:16:00 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 void 112 tsp_dma_init(pcp) 113 struct tsp_config *pcp; 114 { 115 int i; 116 bus_dma_tag_t t; 117 struct ts_pchip *pccsr = pcp->pc_csr; 118 bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase; 119 static struct map_expected { 120 u_int32_t base, mask, enables; 121 } premap[4] = { 122 { 0x800000, 0x700000, WSBA_ENA | WSBA_SG }, 123 { 0x80000000 | WSBA_ENA, 0x3ff00000, WSBA_ENA }, 124 { 0, 0 }, 125 { 0, 0 } 126 }; 127 128 alpha_mb(); 129 for(i = 0; i < 4; ++i) { 130 if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) || 131 EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask)) 132 printf("tsp%d: window %d: %lx/base %lx/mask %lx" 133 " reinitialized\n", 134 pcp->pc_pslot, i, 135 pccsr->tsp_wsba[i].tsg_r, 136 pccsr->tsp_wsm[i].tsg_r, 137 pccsr->tsp_tba[i].tsg_r); 138 pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables; 139 pccsr->tsp_wsm[i].tsg_r = premap[i].mask; 140 } 141 alpha_mb(); 142 143 /* 144 * Initialize the DMA tag used for direct-mapped DMA. 145 */ 146 t = &pcp->pc_dmat_direct; 147 t->_cookie = pcp; 148 t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r); 149 t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r); 150 t->_next_window = &pcp->pc_dmat_sgmap; 151 t->_boundary = 0; 152 t->_sgmap = NULL; 153 t->_get_tag = tsp_dma_get_tag; 154 t->_dmamap_create = _bus_dmamap_create; 155 t->_dmamap_destroy = _bus_dmamap_destroy; 156 t->_dmamap_load = _bus_dmamap_load_direct; 157 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 158 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 159 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 160 t->_dmamap_unload = _bus_dmamap_unload; 161 t->_dmamap_sync = _bus_dmamap_sync; 162 163 t->_dmamem_alloc = _bus_dmamem_alloc; 164 t->_dmamem_free = _bus_dmamem_free; 165 t->_dmamem_map = _bus_dmamem_map; 166 t->_dmamem_unmap = _bus_dmamem_unmap; 167 t->_dmamem_mmap = _bus_dmamem_mmap; 168 169 /* 170 * Initialize the DMA tag used for sgmap-mapped DMA. 171 */ 172 t = &pcp->pc_dmat_sgmap; 173 t->_cookie = pcp; 174 t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r); 175 t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r); 176 t->_next_window = NULL; 177 t->_boundary = 0; 178 t->_sgmap = &pcp->pc_sgmap; 179 t->_get_tag = tsp_dma_get_tag; 180 t->_dmamap_create = alpha_sgmap_dmamap_create; 181 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 182 t->_dmamap_load = tsp_bus_dmamap_load_sgmap; 183 t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap; 184 t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap; 185 t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap; 186 t->_dmamap_unload = tsp_bus_dmamap_unload_sgmap; 187 t->_dmamap_sync = _bus_dmamap_sync; 188 189 t->_dmamem_alloc = _bus_dmamem_alloc; 190 t->_dmamem_free = _bus_dmamem_free; 191 t->_dmamem_map = _bus_dmamem_map; 192 t->_dmamem_unmap = _bus_dmamem_unmap; 193 t->_dmamem_mmap = _bus_dmamem_mmap; 194 195 /* 196 * Initialize the SGMAP. Align page table to 32k in case 197 * window is somewhat larger than expected. 198 */ 199 alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap", 200 sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024)); 201 202 /* 203 * Enable window 0 and enable SG PTE mapping. 204 */ 205 alpha_mb(); 206 pccsr->tsp_wsba[0].tsg_r |= WSBA_SG | WSBA_ENA; 207 alpha_mb(); 208 209 /* 210 * Check windows for sanity, especially if we later decide to 211 * use the firmware's initialization in some cases. 212 */ 213 if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) || 214 (dwbase <= sgwbase && sgwbase < dwbase + dwlen)) 215 panic("tsp_dma_init: overlap"); 216 217 tbase = pcp->pc_sgmap.aps_ptpa; 218 if (tbase & ~0x7fffffc00UL) 219 panic("tsp_dma_init: bad page table address"); 220 alpha_mb(); 221 pccsr->tsp_tba[0].tsg_r = tbase; 222 alpha_mb(); 223 224 tsp_tlb_invalidate(pcp); 225 alpha_mb(); 226 227 /* XXX XXX BEGIN XXX XXX */ 228 { /* XXX */ 229 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 230 alpha_XXX_dmamap_or = dwbase; /* XXX */ 231 } /* XXX */ 232 /* XXX XXX END XXX XXX */ 233 } 234 235 /* 236 * Return the bus dma tag to be used for the specified bus type. 237 * INTERNAL USE ONLY! 238 */ 239 bus_dma_tag_t 240 tsp_dma_get_tag(t, bustype) 241 bus_dma_tag_t t; 242 alpha_bus_t bustype; 243 { 244 struct tsp_config *pcp = t->_cookie; 245 246 switch (bustype) { 247 case ALPHA_BUS_PCI: 248 case ALPHA_BUS_EISA: 249 /* 250 * The direct mapped window will work for most systems, 251 * most of the time. When it doesn't, we chain to the sgmap 252 * window automatically. 253 */ 254 return (&pcp->pc_dmat_direct); 255 256 case ALPHA_BUS_ISA: 257 /* 258 * ISA doesn't have enough address bits to use 259 * the direct-mapped DMA window, so we must use 260 * SGMAPs. 261 */ 262 return (&pcp->pc_dmat_sgmap); 263 264 default: 265 panic("tsp_dma_get_tag: shouldn't be here, really..."); 266 } 267 } 268 269 /* 270 * Load a TSP SGMAP-mapped DMA map with a linear buffer. 271 */ 272 int 273 tsp_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 274 bus_dma_tag_t t; 275 bus_dmamap_t map; 276 void *buf; 277 bus_size_t buflen; 278 struct proc *p; 279 int flags; 280 { 281 int error; 282 283 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 284 t->_sgmap); 285 if (error == 0) 286 tsp_tlb_invalidate(t->_cookie); 287 288 return (error); 289 } 290 291 /* 292 * Load a TSP SGMAP-mapped DMA map with an mbuf chain. 293 */ 294 int 295 tsp_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 296 bus_dma_tag_t t; 297 bus_dmamap_t map; 298 struct mbuf *m; 299 int flags; 300 { 301 int error; 302 303 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 304 if (error == 0) 305 tsp_tlb_invalidate(t->_cookie); 306 307 return (error); 308 } 309 310 /* 311 * Load a TSP SGMAP-mapped DMA map with a uio. 312 */ 313 int 314 tsp_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 315 bus_dma_tag_t t; 316 bus_dmamap_t map; 317 struct uio *uio; 318 int flags; 319 { 320 int error; 321 322 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 323 if (error == 0) 324 tsp_tlb_invalidate(t->_cookie); 325 326 return (error); 327 } 328 329 /* 330 * Load a TSP SGMAP-mapped DMA map with raw memory. 331 */ 332 int 333 tsp_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 334 bus_dma_tag_t t; 335 bus_dmamap_t map; 336 bus_dma_segment_t *segs; 337 int nsegs; 338 bus_size_t size; 339 int flags; 340 { 341 int error; 342 343 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 344 t->_sgmap); 345 if (error == 0) 346 tsp_tlb_invalidate(t->_cookie); 347 348 return (error); 349 } 350 351 /* 352 * Unload a TSP DMA map. 353 */ 354 void 355 tsp_bus_dmamap_unload_sgmap(t, map) 356 bus_dma_tag_t t; 357 bus_dmamap_t map; 358 { 359 360 /* 361 * Invalidate any SGMAP page table entries used by this 362 * mapping. 363 */ 364 pci_sgmap_pte64_unload(t, map, t->_sgmap); 365 tsp_tlb_invalidate(t->_cookie); 366 367 /* 368 * Do the generic bits of the unload. 369 */ 370 _bus_dmamap_unload(t, map); 371 } 372 373 /* 374 * Flush the TSP scatter/gather TLB. 375 */ 376 void 377 tsp_tlb_invalidate(pcp) 378 struct tsp_config *pcp; 379 { 380 381 alpha_mb(); 382 pcp->pc_csr->tsp_tlbia.tsg_r = 0; 383 alpha_mb(); 384 } 385
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