tsp_dma.c revision 1.9
1 /* $NetBSD: tsp_dma.c,v 1.9 2009/03/14 15:36:00 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 1.9 2009/03/14 15:36:00 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(struct tsp_config *pcp) 115 { 116 int i; 117 bus_dma_tag_t t; 118 struct ts_pchip *pccsr = pcp->pc_csr; 119 bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase; 120 static struct map_expected { 121 u_int32_t base, mask, enables; 122 } premap[4] = { 123 { 0x800000, 0x700000, WSBA_ENA | WSBA_SG }, 124 { 0x80000000 | WSBA_ENA, 0x3ff00000, WSBA_ENA }, 125 { 0, 0 }, 126 { 0, 0 } 127 }; 128 129 alpha_mb(); 130 for(i = 0; i < 4; ++i) { 131 if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) || 132 EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask)) 133 printf("tsp%d: window %d: %lx/base %lx/mask %lx" 134 " reinitialized\n", 135 pcp->pc_pslot, i, 136 pccsr->tsp_wsba[i].tsg_r, 137 pccsr->tsp_wsm[i].tsg_r, 138 pccsr->tsp_tba[i].tsg_r); 139 pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables; 140 pccsr->tsp_wsm[i].tsg_r = premap[i].mask; 141 } 142 alpha_mb(); 143 144 /* 145 * Initialize the DMA tag used for direct-mapped DMA. 146 */ 147 t = &pcp->pc_dmat_direct; 148 t->_cookie = pcp; 149 t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r); 150 t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r); 151 t->_next_window = &pcp->pc_dmat_sgmap; 152 t->_boundary = 0; 153 t->_sgmap = NULL; 154 t->_get_tag = tsp_dma_get_tag; 155 t->_dmamap_create = _bus_dmamap_create; 156 t->_dmamap_destroy = _bus_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->_pfthresh = TSP_SGMAP_PFTHRESH; 181 t->_get_tag = tsp_dma_get_tag; 182 t->_dmamap_create = alpha_sgmap_dmamap_create; 183 t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; 184 t->_dmamap_load = tsp_bus_dmamap_load_sgmap; 185 t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap; 186 t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap; 187 t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap; 188 t->_dmamap_unload = tsp_bus_dmamap_unload_sgmap; 189 t->_dmamap_sync = _bus_dmamap_sync; 190 191 t->_dmamem_alloc = _bus_dmamem_alloc; 192 t->_dmamem_free = _bus_dmamem_free; 193 t->_dmamem_map = _bus_dmamem_map; 194 t->_dmamem_unmap = _bus_dmamem_unmap; 195 t->_dmamem_mmap = _bus_dmamem_mmap; 196 197 /* 198 * Initialize the SGMAP. Align page table to 32k in case 199 * window is somewhat larger than expected. 200 */ 201 alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap", 202 sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024)); 203 204 /* 205 * Enable window 0 and enable SG PTE mapping. 206 */ 207 alpha_mb(); 208 pccsr->tsp_wsba[0].tsg_r |= WSBA_SG | WSBA_ENA; 209 alpha_mb(); 210 211 /* 212 * Check windows for sanity, especially if we later decide to 213 * use the firmware's initialization in some cases. 214 */ 215 if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) || 216 (dwbase <= sgwbase && sgwbase < dwbase + dwlen)) 217 panic("tsp_dma_init: overlap"); 218 219 tbase = pcp->pc_sgmap.aps_ptpa; 220 if (tbase & ~0x7fffffc00UL) 221 panic("tsp_dma_init: bad page table address"); 222 alpha_mb(); 223 pccsr->tsp_tba[0].tsg_r = tbase; 224 alpha_mb(); 225 226 tsp_tlb_invalidate(pcp); 227 alpha_mb(); 228 229 /* XXX XXX BEGIN XXX XXX */ 230 { /* XXX */ 231 extern paddr_t alpha_XXX_dmamap_or; /* XXX */ 232 alpha_XXX_dmamap_or = dwbase; /* XXX */ 233 } /* XXX */ 234 /* XXX XXX END XXX XXX */ 235 } 236 237 /* 238 * Return the bus dma tag to be used for the specified bus type. 239 * INTERNAL USE ONLY! 240 */ 241 bus_dma_tag_t 242 tsp_dma_get_tag(bus_dma_tag_t t, 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(bus_dma_tag_t t, bus_dmamap_t map, void *buf, bus_size_t buflen, struct proc *p, int flags) 274 { 275 int error; 276 277 error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, 278 t->_sgmap); 279 if (error == 0) 280 tsp_tlb_invalidate(t->_cookie); 281 282 return (error); 283 } 284 285 /* 286 * Load a TSP SGMAP-mapped DMA map with an mbuf chain. 287 */ 288 int 289 tsp_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m, int flags) 290 { 291 int error; 292 293 error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); 294 if (error == 0) 295 tsp_tlb_invalidate(t->_cookie); 296 297 return (error); 298 } 299 300 /* 301 * Load a TSP SGMAP-mapped DMA map with a uio. 302 */ 303 int 304 tsp_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, int flags) 305 { 306 int error; 307 308 error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); 309 if (error == 0) 310 tsp_tlb_invalidate(t->_cookie); 311 312 return (error); 313 } 314 315 /* 316 * Load a TSP SGMAP-mapped DMA map with raw memory. 317 */ 318 int 319 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) 320 { 321 int error; 322 323 error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, 324 t->_sgmap); 325 if (error == 0) 326 tsp_tlb_invalidate(t->_cookie); 327 328 return (error); 329 } 330 331 /* 332 * Unload a TSP DMA map. 333 */ 334 void 335 tsp_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 336 { 337 338 /* 339 * Invalidate any SGMAP page table entries used by this 340 * mapping. 341 */ 342 pci_sgmap_pte64_unload(t, map, t->_sgmap); 343 tsp_tlb_invalidate(t->_cookie); 344 345 /* 346 * Do the generic bits of the unload. 347 */ 348 _bus_dmamap_unload(t, map); 349 } 350 351 /* 352 * Flush the TSP scatter/gather TLB. 353 */ 354 void 355 tsp_tlb_invalidate(struct tsp_config *pcp) 356 { 357 358 alpha_mb(); 359 pcp->pc_csr->tsp_tlbia.tsg_r = 0; 360 alpha_mb(); 361 } 362
Indexes created Mon Sep 29 21:09:56 GMT 2025