tsp_dma.c revision 1.8
1 /* $NetBSD: tsp_dma.c,v 1.8 2009/03/14 14:45:53 dsl 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 * 51 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 52 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 53 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 54 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 55 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 56 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 57 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 58 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 59 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 60 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 61 * POSSIBILITY OF SUCH DAMAGE. 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: tsp_dma.c,v 1.8 2009/03/14 14:45:53 dsl Exp $"); 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/kernel.h> 70 #include <sys/device.h> 71 #include <sys/malloc.h> 72 73 #include <uvm/uvm_extern.h> 74 75 #include <machine/autoconf.h> 76 #define _ALPHA_BUS_DMA_PRIVATE 77 #include <machine/bus.h> 78 #include <machine/rpb.h> 79 80 #include <dev/pci/pcireg.h> 81 #include <dev/pci/pcivar.h> 82 #include <alpha/pci/tsreg.h> 83 #include <alpha/pci/tsvar.h> 84 85 #define tsp_dma() { Generate ctags(1) key. } 86 87 #define EDIFF(a, b) (((a) | WSBA_ENA | WSBA_SG) != ((b) | WSBA_ENA | WSBA_SG)) 88 89 bus_dma_tag_t tsp_dma_get_tag(bus_dma_tag_t, alpha_bus_t); 90 91 int tsp_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 92 bus_size_t, struct proc *, int); 93 94 int tsp_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 95 struct mbuf *, int); 96 97 int tsp_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 98 struct uio *, int); 99 100 int tsp_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 101 bus_dma_segment_t *, int, bus_size_t, int); 102 103 void tsp_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 104 105 void tsp_tlb_invalidate(struct tsp_config *); 106 107 /* 108 * XXX Need to figure out what this is, if any. Initialize it to 109 * XXX something that should be safe. 110 */ 111 #define TSP_SGMAP_PFTHRESH 256 112 113 void 114 tsp_dma_init(pcp) 115 struct tsp_config *pcp; 116 { 117 int i; 118 bus_dma_tag_t t; 119 struct ts_pchip *pccsr = pcp->pc_csr; 120 bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase; 121 static struct map_expected { 122 u_int32_t base, mask, enables; 123 } premap[4] = { 124 { 0x800000, 0x700000, WSBA_ENA | WSBA_SG }, 125 { 0x80000000 | WSBA_ENA, 0x3ff00000, WSBA_ENA }, 126 { 0, 0 }, 127 { 0, 0 } 128 }; 129 130 alpha_mb(); 131 for(i = 0; i < 4; ++i) { 132 if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) || 133 EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask)) 134 printf("tsp%d: window %d: %lx/base %lx/mask %lx" 135 " reinitialized\n", 136 pcp->pc_pslot, i, 137 pccsr->tsp_wsba[i].tsg_r, 138 pccsr->tsp_wsm[i].tsg_r, 139 pccsr->tsp_tba[i].tsg_r); 140 pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables; 141 pccsr->tsp_wsm[i].tsg_r = premap[i].mask; 142 } 143 alpha_mb(); 144 145 /* 146 * Initialize the DMA tag used for direct-mapped DMA. 147 */ 148 t = &pcp->pc_dmat_direct; 149 t->_cookie = pcp; 150 t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r); 151 t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r); 152 t->_next_window = &pcp->pc_dmat_sgmap; 153 t->_boundary = 0; 154 t->_sgmap = NULL; 155 t->_get_tag = tsp_dma_get_tag; 156 t->_dmamap_create = _bus_dmamap_create; 157 t->_dmamap_destroy = _bus_dmamap_destroy; 158 t->_dmamap_load = _bus_dmamap_load_direct; 159 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 160 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 161 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 162 t->_dmamap_unload = _bus_dmamap_unload; 163 t->_dmamap_sync = _bus_dmamap_sync; 164 165 t->_dmamem_alloc = _bus_dmamem_alloc; 166 t->_dmamem_free = _bus_dmamem_free; 167 t->_dmamem_map = _bus_dmamem_map; 168 t->_dmamem_unmap = _bus_dmamem_unmap; 169 t->_dmamem_mmap = _bus_dmamem_mmap; 170 171 /* 172 * Initialize the DMA tag used for sgmap-mapped DMA. 173 */ 174 t = &pcp->pc_dmat_sgmap; 175 t->_cookie = pcp; 176 t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r); 177 t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r); 178 t->_next_window = NULL; 179 t->_boundary = 0; 180 t->_sgmap = &pcp->pc_sgmap; 181 t->_pfthresh = TSP_SGMAP_PFTHRESH; 182 t->_get_tag = tsp_dma_get_tag; 183 t->_dmamap_create = alpha_sgmap_dmamap_create; 184 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 185 t->_dmamap_load = tsp_bus_dmamap_load_sgmap; 186 t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap; 187 t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap; 188 t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap; 189 t->_dmamap_unload = tsp_bus_dmamap_unload_sgmap; 190 t->_dmamap_sync = _bus_dmamap_sync; 191 192 t->_dmamem_alloc = _bus_dmamem_alloc; 193 t->_dmamem_free = _bus_dmamem_free; 194 t->_dmamem_map = _bus_dmamem_map; 195 t->_dmamem_unmap = _bus_dmamem_unmap; 196 t->_dmamem_mmap = _bus_dmamem_mmap; 197 198 /* 199 * Initialize the SGMAP. Align page table to 32k in case 200 * window is somewhat larger than expected. 201 */ 202 alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap", 203 sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024)); 204 205 /* 206 * Enable window 0 and enable SG PTE mapping. 207 */ 208 alpha_mb(); 209 pccsr->tsp_wsba[0].tsg_r |= WSBA_SG | WSBA_ENA; 210 alpha_mb(); 211 212 /* 213 * Check windows for sanity, especially if we later decide to 214 * use the firmware's initialization in some cases. 215 */ 216 if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) || 217 (dwbase <= sgwbase && sgwbase < dwbase + dwlen)) 218 panic("tsp_dma_init: overlap"); 219 220 tbase = pcp->pc_sgmap.aps_ptpa; 221 if (tbase & ~0x7fffffc00UL) 222 panic("tsp_dma_init: bad page table address"); 223 alpha_mb(); 224 pccsr->tsp_tba[0].tsg_r = tbase; 225 alpha_mb(); 226 227 tsp_tlb_invalidate(pcp); 228 alpha_mb(); 229 230 /* XXX XXX BEGIN XXX XXX */ 231 { /* XXX */ 232 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 233 alpha_XXX_dmamap_or = dwbase; /* XXX */ 234 } /* XXX */ 235 /* XXX XXX END XXX XXX */ 236 } 237 238 /* 239 * Return the bus dma tag to be used for the specified bus type. 240 * INTERNAL USE ONLY! 241 */ 242 bus_dma_tag_t 243 tsp_dma_get_tag(t, bustype) 244 bus_dma_tag_t t; 245 alpha_bus_t bustype; 246 { 247 struct tsp_config *pcp = t->_cookie; 248 249 switch (bustype) { 250 case ALPHA_BUS_PCI: 251 case ALPHA_BUS_EISA: 252 /* 253 * The direct mapped window will work for most systems, 254 * most of the time. When it doesn't, we chain to the sgmap 255 * window automatically. 256 */ 257 return (&pcp->pc_dmat_direct); 258 259 case ALPHA_BUS_ISA: 260 /* 261 * ISA doesn't have enough address bits to use 262 * the direct-mapped DMA window, so we must use 263 * SGMAPs. 264 */ 265 return (&pcp->pc_dmat_sgmap); 266 267 default: 268 panic("tsp_dma_get_tag: shouldn't be here, really..."); 269 } 270 } 271 272 /* 273 * Load a TSP SGMAP-mapped DMA map with a linear buffer. 274 */ 275 int 276 tsp_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 277 bus_dma_tag_t t; 278 bus_dmamap_t map; 279 void *buf; 280 bus_size_t buflen; 281 struct proc *p; 282 int flags; 283 { 284 int error; 285 286 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 287 t->_sgmap); 288 if (error == 0) 289 tsp_tlb_invalidate(t->_cookie); 290 291 return (error); 292 } 293 294 /* 295 * Load a TSP SGMAP-mapped DMA map with an mbuf chain. 296 */ 297 int 298 tsp_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 299 bus_dma_tag_t t; 300 bus_dmamap_t map; 301 struct mbuf *m; 302 int flags; 303 { 304 int error; 305 306 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 307 if (error == 0) 308 tsp_tlb_invalidate(t->_cookie); 309 310 return (error); 311 } 312 313 /* 314 * Load a TSP SGMAP-mapped DMA map with a uio. 315 */ 316 int 317 tsp_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 318 bus_dma_tag_t t; 319 bus_dmamap_t map; 320 struct uio *uio; 321 int flags; 322 { 323 int error; 324 325 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 326 if (error == 0) 327 tsp_tlb_invalidate(t->_cookie); 328 329 return (error); 330 } 331 332 /* 333 * Load a TSP SGMAP-mapped DMA map with raw memory. 334 */ 335 int 336 tsp_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 337 bus_dma_tag_t t; 338 bus_dmamap_t map; 339 bus_dma_segment_t *segs; 340 int nsegs; 341 bus_size_t size; 342 int flags; 343 { 344 int error; 345 346 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 347 t->_sgmap); 348 if (error == 0) 349 tsp_tlb_invalidate(t->_cookie); 350 351 return (error); 352 } 353 354 /* 355 * Unload a TSP DMA map. 356 */ 357 void 358 tsp_bus_dmamap_unload_sgmap(t, map) 359 bus_dma_tag_t t; 360 bus_dmamap_t map; 361 { 362 363 /* 364 * Invalidate any SGMAP page table entries used by this 365 * mapping. 366 */ 367 pci_sgmap_pte64_unload(t, map, t->_sgmap); 368 tsp_tlb_invalidate(t->_cookie); 369 370 /* 371 * Do the generic bits of the unload. 372 */ 373 _bus_dmamap_unload(t, map); 374 } 375 376 /* 377 * Flush the TSP scatter/gather TLB. 378 */ 379 void 380 tsp_tlb_invalidate(pcp) 381 struct tsp_config *pcp; 382 { 383 384 alpha_mb(); 385 pcp->pc_csr->tsp_tlbia.tsg_r = 0; 386 alpha_mb(); 387 } 388
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