1 /* $OpenBSD: tsp_dma.c,v 1.12 2015/01/03 20:44:23 miod Exp $ */ 2 /* $NetBSD: tsp_dma.c,v 1.1 1999/06/29 06:46:47 ross Exp $ */ 3 4 /*- 5 * Copyright (c) 1999 by Ross Harvey. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Ross Harvey. 18 * 4. The name of Ross Harvey may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS 22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE 24 * ARE DISCLAIMED. IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 /*- 36 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to The NetBSD Foundation 40 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 41 * NASA Ames Research Center. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 53 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 54 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 55 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 56 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 57 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 58 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 59 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 60 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 61 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 62 * POSSIBILITY OF SUCH DAMAGE. 63 */ 64 65 #define _ALPHA_BUS_DMA_PRIVATE 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 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 int tsp_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 91 bus_size_t, struct proc *, int); 92 int tsp_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 93 struct mbuf *, int); 94 int tsp_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 95 struct uio *, int); 96 int tsp_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 97 bus_dma_segment_t *, int, bus_size_t, int); 98 void tsp_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 99 void tsp_tlb_invalidate(struct tsp_config *); 100 101 void 102 tsp_dma_init(struct device *tsp, struct tsp_config *pcp) 103 { 104 int i; 105 bus_dma_tag_t t; 106 struct ts_pchip *pccsr = pcp->pc_csr; 107 bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase; 108 static const struct map_expected { 109 u_int32_t base, mask, physbase, enables; 110 } premap[4] = { 111 /* 0-8MB at 8MB with S/G DMA (isa space) */ 112 { 0x00800000, 0x00700000, 0x00000000, WSBA_ENA | WSBA_SG }, 113 /* 0-1GB at 2GB direct */ 114 { 0x80000000, 0x3ff00000, 0x00000000, WSBA_ENA }, 115 { 0, 0, 0 }, 116 { 0, 0, 0 } 117 }; 118 119 alpha_mb(); 120 for(i = 0; i < 4; ++i) { 121 #ifdef DEBUG 122 if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) || 123 EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask) || 124 ((premap[i].enables & WSBA_SG) == 0 && 125 pccsr->tsp_tba[i].tsg_r != premap[i].physbase)) 126 printf("%s: window %d: %lx/base %lx/mask %lx" 127 " reinitialized\n", 128 tsp->dv_xname, i, 129 pccsr->tsp_wsba[i].tsg_r, 130 pccsr->tsp_wsm[i].tsg_r, 131 pccsr->tsp_tba[i].tsg_r); 132 #endif 133 pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables; 134 pccsr->tsp_wsm[i].tsg_r = premap[i].mask; 135 if ((premap[i].enables & WSBA_SG) == 0) 136 pccsr->tsp_tba[i].tsg_r = premap[i].physbase; 137 } 138 alpha_mb(); 139 140 /* 141 * Initialize the DMA tags used for direct-mapped DMA. 142 */ 143 t = &pcp->pc_dmat_direct; 144 t->_cookie = pcp; 145 t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r); 146 t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r); 147 t->_next_window = &pcp->pc_dmat_sgmap; 148 t->_boundary = 0; 149 t->_sgmap = NULL; 150 t->_get_tag = tsp_dma_get_tag; 151 /* 152 * Since we fall back to sgmap if the direct mapping fails, 153 * we need to set up for sgmap in any case. 154 */ 155 t->_dmamap_create = alpha_sgmap_dmamap_create; 156 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 157 t->_dmamap_load = _bus_dmamap_load_direct; 158 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 159 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 160 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 161 t->_dmamap_unload = _bus_dmamap_unload; 162 t->_dmamap_sync = _bus_dmamap_sync; 163 164 t->_dmamem_alloc = _bus_dmamem_alloc; 165 t->_dmamem_free = _bus_dmamem_free; 166 t->_dmamem_map = _bus_dmamem_map; 167 t->_dmamem_unmap = _bus_dmamem_unmap; 168 t->_dmamem_mmap = _bus_dmamem_mmap; 169 170 /* 171 * Initialize the DMA tag used for sgmap-mapped DMA. 172 */ 173 t = &pcp->pc_dmat_sgmap; 174 t->_cookie = pcp; 175 t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r); 176 t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r); 177 t->_next_window = NULL; 178 t->_boundary = 0; 179 t->_sgmap = &pcp->pc_sgmap; 180 t->_get_tag = tsp_dma_get_tag; 181 t->_dmamap_create = alpha_sgmap_dmamap_create; 182 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 183 t->_dmamap_load = tsp_bus_dmamap_load_sgmap; 184 t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap; 185 t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap; 186 t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap; 187 t->_dmamap_unload = tsp_bus_dmamap_unload_sgmap; 188 t->_dmamap_sync = _bus_dmamap_sync; 189 190 t->_dmamem_alloc = _bus_dmamem_alloc; 191 t->_dmamem_free = _bus_dmamem_free; 192 t->_dmamem_map = _bus_dmamem_map; 193 t->_dmamem_unmap = _bus_dmamem_unmap; 194 t->_dmamem_mmap = _bus_dmamem_mmap; 195 196 /* 197 * Initialize the SGMAP. Align page table to 32k in case 198 * window is somewhat larger than expected. 199 */ 200 alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap", 201 sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024)); 202 203 /* 204 * Check windows for sanity, especially if we later decide to 205 * use the firmware's initialization in some cases. 206 */ 207 if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) || 208 (dwbase <= sgwbase && sgwbase < dwbase + dwlen)) 209 panic("%s: overlap sg 0x%lx len 0x%lx d 0x%lx len 0x%lx", 210 __func__, sgwbase, sgwlen, dwbase, dwlen); 211 212 tbase = pcp->pc_sgmap.aps_ptpa; 213 if (tbase & ~0x7fffffc00UL) 214 panic("tsp_dma_init: bad page table address"); 215 alpha_mb(); 216 pccsr->tsp_tba[0].tsg_r = tbase; 217 alpha_mb(); 218 219 tsp_tlb_invalidate(pcp); 220 alpha_mb(); 221 222 /* XXX XXX BEGIN XXX XXX */ 223 { /* XXX */ 224 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 225 alpha_XXX_dmamap_or = dwbase; /* XXX */ 226 } /* XXX */ 227 /* XXX XXX END XXX XXX */ 228 } 229 230 /* 231 * Return the bus dma tag to be used for the specified bus type. 232 * INTERNAL USE ONLY! 233 */ 234 bus_dma_tag_t 235 tsp_dma_get_tag(t, bustype) 236 bus_dma_tag_t t; 237 alpha_bus_t bustype; 238 { 239 struct tsp_config *pcp = t->_cookie; 240 241 switch (bustype) { 242 case ALPHA_BUS_PCI: 243 case ALPHA_BUS_EISA: 244 /* 245 * The direct mapped window will work for most systems, 246 * most of the time. When it doesn't, we chain to the sgmap 247 * window automatically. 248 */ 249 return (&pcp->pc_dmat_direct); 250 251 case ALPHA_BUS_ISA: 252 /* 253 * ISA doesn't have enough address bits to use 254 * the direct-mapped DMA window, so we must use 255 * SGMAPs. 256 */ 257 return (&pcp->pc_dmat_sgmap); 258 259 default: 260 panic("tsp_dma_get_tag: shouldn't be here, really..."); 261 } 262 } 263 264 /* 265 * Load a TSP SGMAP-mapped DMA map with a linear buffer. 266 */ 267 int 268 tsp_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 269 bus_dma_tag_t t; 270 bus_dmamap_t map; 271 void *buf; 272 bus_size_t buflen; 273 struct proc *p; 274 int flags; 275 { 276 int error; 277 278 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 279 t->_sgmap); 280 if (error == 0) 281 tsp_tlb_invalidate(t->_cookie); 282 283 return (error); 284 } 285 286 /* 287 * Load a TSP SGMAP-mapped DMA map with an mbuf chain. 288 */ 289 int 290 tsp_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 291 bus_dma_tag_t t; 292 bus_dmamap_t map; 293 struct mbuf *m; 294 int flags; 295 { 296 int error; 297 298 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 299 if (error == 0) 300 tsp_tlb_invalidate(t->_cookie); 301 302 return (error); 303 } 304 305 /* 306 * Load a TSP SGMAP-mapped DMA map with a uio. 307 */ 308 int 309 tsp_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 310 bus_dma_tag_t t; 311 bus_dmamap_t map; 312 struct uio *uio; 313 int flags; 314 { 315 int error; 316 317 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 318 if (error == 0) 319 tsp_tlb_invalidate(t->_cookie); 320 321 return (error); 322 } 323 324 /* 325 * Load a TSP SGMAP-mapped DMA map with raw memory. 326 */ 327 int 328 tsp_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 329 bus_dma_tag_t t; 330 bus_dmamap_t map; 331 bus_dma_segment_t *segs; 332 int nsegs; 333 bus_size_t size; 334 int flags; 335 { 336 int error; 337 338 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 339 t->_sgmap); 340 if (error == 0) 341 tsp_tlb_invalidate(t->_cookie); 342 343 return (error); 344 } 345 346 /* 347 * Unload a TSP DMA map. 348 */ 349 void 350 tsp_bus_dmamap_unload_sgmap(t, map) 351 bus_dma_tag_t t; 352 bus_dmamap_t map; 353 { 354 355 /* 356 * Invalidate any SGMAP page table entries used by this 357 * mapping. 358 */ 359 pci_sgmap_pte64_unload(t, map, t->_sgmap); 360 tsp_tlb_invalidate(t->_cookie); 361 362 /* 363 * Do the generic bits of the unload. 364 */ 365 _bus_dmamap_unload(t, map); 366 } 367 368 /* 369 * Flush the TSP scatter/gather TLB. 370 */ 371 void 372 tsp_tlb_invalidate(pcp) 373 struct tsp_config *pcp; 374 { 375 376 alpha_mb(); 377 *pcp->pc_tlbia = 0; 378 alpha_mb(); 379 } 380