1 /* $OpenBSD: tsp_dma.c,v 1.8 2009/10/02 18:01:47 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 struct map_expected { 109 u_int32_t base, mask, enables; 110 } premap[4] = { 111 { 0x00800000, 0x00700000, WSBA_ENA | WSBA_SG }, 112 { 0x80000000, 0x3ff00000, WSBA_ENA }, 113 { 0, 0, 0 }, 114 { 0, 0, 0 } 115 }; 116 117 alpha_mb(); 118 for(i = 0; i < 4; ++i) { 119 if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) || 120 EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask)) 121 printf("%s: window %d: %lx/base %lx/mask %lx" 122 " reinitialized\n", 123 tsp->dv_xname, i, 124 pccsr->tsp_wsba[i].tsg_r, 125 pccsr->tsp_wsm[i].tsg_r, 126 pccsr->tsp_tba[i].tsg_r); 127 pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables; 128 pccsr->tsp_wsm[i].tsg_r = premap[i].mask; 129 } 130 alpha_mb(); 131 132 /* 133 * Initialize the DMA tag used for direct-mapped DMA. 134 */ 135 t = &pcp->pc_dmat_direct; 136 t->_cookie = pcp; 137 t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r); 138 t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r); 139 t->_next_window = &pcp->pc_dmat_sgmap; 140 t->_boundary = 0; 141 t->_sgmap = NULL; 142 t->_get_tag = tsp_dma_get_tag; 143 t->_dmamap_create = _bus_dmamap_create; 144 t->_dmamap_destroy = _bus_dmamap_destroy; 145 t->_dmamap_load = _bus_dmamap_load_direct; 146 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 147 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 148 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 149 t->_dmamap_unload = _bus_dmamap_unload; 150 t->_dmamap_sync = _bus_dmamap_sync; 151 152 t->_dmamem_alloc = _bus_dmamem_alloc; 153 t->_dmamem_free = _bus_dmamem_free; 154 t->_dmamem_map = _bus_dmamem_map; 155 t->_dmamem_unmap = _bus_dmamem_unmap; 156 t->_dmamem_mmap = _bus_dmamem_mmap; 157 158 /* 159 * Initialize the DMA tag used for sgmap-mapped DMA. 160 */ 161 t = &pcp->pc_dmat_sgmap; 162 t->_cookie = pcp; 163 t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r); 164 t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r); 165 t->_next_window = NULL; 166 t->_boundary = 0; 167 t->_sgmap = &pcp->pc_sgmap; 168 t->_get_tag = tsp_dma_get_tag; 169 t->_dmamap_create = alpha_sgmap_dmamap_create; 170 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 171 t->_dmamap_load = tsp_bus_dmamap_load_sgmap; 172 t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap; 173 t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap; 174 t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap; 175 t->_dmamap_unload = tsp_bus_dmamap_unload_sgmap; 176 t->_dmamap_sync = _bus_dmamap_sync; 177 178 t->_dmamem_alloc = _bus_dmamem_alloc; 179 t->_dmamem_free = _bus_dmamem_free; 180 t->_dmamem_map = _bus_dmamem_map; 181 t->_dmamem_unmap = _bus_dmamem_unmap; 182 t->_dmamem_mmap = _bus_dmamem_mmap; 183 184 /* 185 * Initialize the SGMAP. Align page table to 32k in case 186 * window is somewhat larger than expected. 187 */ 188 alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap", 189 sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024)); 190 191 /* 192 * Enable window 0 and enable SG PTE mapping. 193 */ 194 alpha_mb(); 195 pccsr->tsp_wsba[0].tsg_r |= WSBA_SG | WSBA_ENA; 196 alpha_mb(); 197 198 /* 199 * Enable window 1 in direct mode. 200 */ 201 alpha_mb(); 202 pccsr->tsp_wsba[1].tsg_r = 203 (pccsr->tsp_wsba[1].tsg_r & ~WSBA_SG) | WSBA_ENA; 204 alpha_mb(); 205 206 /* 207 * Check windows for sanity, especially if we later decide to 208 * use the firmware's initialization in some cases. 209 */ 210 if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) || 211 (dwbase <= sgwbase && sgwbase < dwbase + dwlen)) 212 panic("tsp_dma_init: overlap sg %p len %p d %p len %p", 213 sgwbase, sgwlen, dwbase, dwlen); 214 215 tbase = pcp->pc_sgmap.aps_ptpa; 216 if (tbase & ~0x7fffffc00UL) 217 panic("tsp_dma_init: bad page table address"); 218 alpha_mb(); 219 pccsr->tsp_tba[0].tsg_r = tbase; 220 alpha_mb(); 221 222 tsp_tlb_invalidate(pcp); 223 alpha_mb(); 224 225 /* XXX XXX BEGIN XXX XXX */ 226 { /* XXX */ 227 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 228 alpha_XXX_dmamap_or = dwbase; /* XXX */ 229 } /* XXX */ 230 /* XXX XXX END XXX XXX */ 231 } 232 233 /* 234 * Return the bus dma tag to be used for the specified bus type. 235 * INTERNAL USE ONLY! 236 */ 237 bus_dma_tag_t 238 tsp_dma_get_tag(t, bustype) 239 bus_dma_tag_t t; 240 alpha_bus_t bustype; 241 { 242 struct tsp_config *pcp = t->_cookie; 243 244 switch (bustype) { 245 case ALPHA_BUS_PCI: 246 case ALPHA_BUS_EISA: 247 /* 248 * The direct mapped window will work for most systems, 249 * most of the time. When it doesn't, we chain to the sgmap 250 * window automatically. 251 */ 252 return (&pcp->pc_dmat_direct); 253 254 case ALPHA_BUS_ISA: 255 /* 256 * ISA doesn't have enough address bits to use 257 * the direct-mapped DMA window, so we must use 258 * SGMAPs. 259 */ 260 return (&pcp->pc_dmat_sgmap); 261 262 default: 263 panic("tsp_dma_get_tag: shouldn't be here, really..."); 264 } 265 } 266 267 /* 268 * Load a TSP SGMAP-mapped DMA map with a linear buffer. 269 */ 270 int 271 tsp_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 272 bus_dma_tag_t t; 273 bus_dmamap_t map; 274 void *buf; 275 bus_size_t buflen; 276 struct proc *p; 277 int flags; 278 { 279 int error; 280 281 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 282 t->_sgmap); 283 if (error == 0) 284 tsp_tlb_invalidate(t->_cookie); 285 286 return (error); 287 } 288 289 /* 290 * Load a TSP SGMAP-mapped DMA map with an mbuf chain. 291 */ 292 int 293 tsp_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 294 bus_dma_tag_t t; 295 bus_dmamap_t map; 296 struct mbuf *m; 297 int flags; 298 { 299 int error; 300 301 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 302 if (error == 0) 303 tsp_tlb_invalidate(t->_cookie); 304 305 return (error); 306 } 307 308 /* 309 * Load a TSP SGMAP-mapped DMA map with a uio. 310 */ 311 int 312 tsp_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 313 bus_dma_tag_t t; 314 bus_dmamap_t map; 315 struct uio *uio; 316 int flags; 317 { 318 int error; 319 320 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 321 if (error == 0) 322 tsp_tlb_invalidate(t->_cookie); 323 324 return (error); 325 } 326 327 /* 328 * Load a TSP SGMAP-mapped DMA map with raw memory. 329 */ 330 int 331 tsp_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 332 bus_dma_tag_t t; 333 bus_dmamap_t map; 334 bus_dma_segment_t *segs; 335 int nsegs; 336 bus_size_t size; 337 int flags; 338 { 339 int error; 340 341 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 342 t->_sgmap); 343 if (error == 0) 344 tsp_tlb_invalidate(t->_cookie); 345 346 return (error); 347 } 348 349 /* 350 * Unload a TSP DMA map. 351 */ 352 void 353 tsp_bus_dmamap_unload_sgmap(t, map) 354 bus_dma_tag_t t; 355 bus_dmamap_t map; 356 { 357 358 /* 359 * Invalidate any SGMAP page table entries used by this 360 * mapping. 361 */ 362 pci_sgmap_pte64_unload(t, map, t->_sgmap); 363 tsp_tlb_invalidate(t->_cookie); 364 365 /* 366 * Do the generic bits of the unload. 367 */ 368 _bus_dmamap_unload(t, map); 369 } 370 371 /* 372 * Flush the TSP scatter/gather TLB. 373 */ 374 void 375 tsp_tlb_invalidate(pcp) 376 struct tsp_config *pcp; 377 { 378 379 alpha_mb(); 380 *pcp->pc_tlbia = 0; 381 alpha_mb(); 382 } 383