tsp_dma.c revision 1.11
1 /* $NetBSD: tsp_dma.c,v 1.11 2011/07/01 19:19:50 dyoung 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 1.11 2011/07/01 19:19:50 dyoung 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 <machine/autoconf.h> 74 #define _ALPHA_BUS_DMA_PRIVATE 75 #include <sys/bus.h> 76 #include <machine/rpb.h> 77 78 #include <dev/pci/pcireg.h> 79 #include <dev/pci/pcivar.h> 80 #include <alpha/pci/tsreg.h> 81 #include <alpha/pci/tsvar.h> 82 83 #define tsp_dma() { Generate ctags(1) key. } 84 85 #define EDIFF(a, b) (((a) | WSBA_ENA | WSBA_SG) != ((b) | WSBA_ENA | WSBA_SG)) 86 87 bus_dma_tag_t tsp_dma_get_tag(bus_dma_tag_t, alpha_bus_t); 88 89 int tsp_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 90 bus_size_t, struct proc *, int); 91 92 int tsp_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 93 struct mbuf *, int); 94 95 int tsp_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 96 struct uio *, int); 97 98 int tsp_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 99 bus_dma_segment_t *, int, bus_size_t, int); 100 101 void tsp_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 102 103 void tsp_tlb_invalidate(struct tsp_config *); 104 105 /* 106 * XXX Need to figure out what this is, if any. Initialize it to 107 * XXX something that should be safe. 108 */ 109 #define TSP_SGMAP_PFTHRESH 256 110 111 void 112 tsp_dma_init(struct tsp_config *pcp) 113 { 114 int i; 115 bus_dma_tag_t t; 116 struct ts_pchip *pccsr = pcp->pc_csr; 117 bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase; 118 static struct map_expected { 119 u_int32_t base, mask, enables; 120 } premap[4] = { 121 { 0x800000, 0x700000, WSBA_ENA | WSBA_SG }, 122 { 0x80000000 | WSBA_ENA, 0x3ff00000, WSBA_ENA }, 123 { 0, 0 }, 124 { 0, 0 } 125 }; 126 127 alpha_mb(); 128 for(i = 0; i < 4; ++i) { 129 if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) || 130 EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask)) 131 printf("tsp%d: window %d: %lx/base %lx/mask %lx" 132 " reinitialized\n", 133 pcp->pc_pslot, i, 134 pccsr->tsp_wsba[i].tsg_r, 135 pccsr->tsp_wsm[i].tsg_r, 136 pccsr->tsp_tba[i].tsg_r); 137 pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables; 138 pccsr->tsp_wsm[i].tsg_r = premap[i].mask; 139 } 140 alpha_mb(); 141 142 /* 143 * Initialize the DMA tag used for direct-mapped DMA. 144 */ 145 t = &pcp->pc_dmat_direct; 146 t->_cookie = pcp; 147 t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r); 148 t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r); 149 t->_next_window = &pcp->pc_dmat_sgmap; 150 t->_boundary = 0; 151 t->_sgmap = NULL; 152 t->_get_tag = tsp_dma_get_tag; 153 t->_dmamap_create = _bus_dmamap_create; 154 t->_dmamap_destroy = _bus_dmamap_destroy; 155 t->_dmamap_load = _bus_dmamap_load_direct; 156 t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; 157 t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; 158 t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; 159 t->_dmamap_unload = _bus_dmamap_unload; 160 t->_dmamap_sync = _bus_dmamap_sync; 161 162 t->_dmamem_alloc = _bus_dmamem_alloc; 163 t->_dmamem_free = _bus_dmamem_free; 164 t->_dmamem_map = _bus_dmamem_map; 165 t->_dmamem_unmap = _bus_dmamem_unmap; 166 t->_dmamem_mmap = _bus_dmamem_mmap; 167 168 /* 169 * Initialize the DMA tag used for sgmap-mapped DMA. 170 */ 171 t = &pcp->pc_dmat_sgmap; 172 t->_cookie = pcp; 173 t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r); 174 t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r); 175 t->_next_window = NULL; 176 t->_boundary = 0; 177 t->_sgmap = &pcp->pc_sgmap; 178 t->_pfthresh = TSP_SGMAP_PFTHRESH; 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(bus_dma_tag_t t, 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(bus_dma_tag_t t, bus_dmamap_t map, void *buf, bus_size_t buflen, struct proc *p, int flags) 272 { 273 int error; 274 275 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 276 t->_sgmap); 277 if (error == 0) 278 tsp_tlb_invalidate(t->_cookie); 279 280 return (error); 281 } 282 283 /* 284 * Load a TSP SGMAP-mapped DMA map with an mbuf chain. 285 */ 286 int 287 tsp_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m, int flags) 288 { 289 int error; 290 291 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, 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 a uio. 300 */ 301 int 302 tsp_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, int flags) 303 { 304 int error; 305 306 error = pci_sgmap_pte64_load_uio(t, map, uio, 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 raw memory. 315 */ 316 int 317 tsp_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 318 { 319 int error; 320 321 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 322 t->_sgmap); 323 if (error == 0) 324 tsp_tlb_invalidate(t->_cookie); 325 326 return (error); 327 } 328 329 /* 330 * Unload a TSP DMA map. 331 */ 332 void 333 tsp_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 334 { 335 336 /* 337 * Invalidate any SGMAP page table entries used by this 338 * mapping. 339 */ 340 pci_sgmap_pte64_unload(t, map, t->_sgmap); 341 tsp_tlb_invalidate(t->_cookie); 342 343 /* 344 * Do the generic bits of the unload. 345 */ 346 _bus_dmamap_unload(t, map); 347 } 348 349 /* 350 * Flush the TSP scatter/gather TLB. 351 */ 352 void 353 tsp_tlb_invalidate(struct tsp_config *pcp) 354 { 355 356 alpha_mb(); 357 pcp->pc_csr->tsp_tlbia.tsg_r = 0; 358 alpha_mb(); 359 } 360
Indexes created Tue Sep 30 11:09:46 GMT 2025