cia.c revision 1.69
1 /* $NetBSD: cia.c,v 1.69 2009/03/14 21:04:02 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 35 * All rights reserved. 36 * 37 * Author: Chris G. Demetriou 38 * 39 * Permission to use, copy, modify and distribute this software and 40 * its documentation is hereby granted, provided that both the copyright 41 * notice and this permission notice appear in all copies of the 42 * software, derivative works or modified versions, and any portions 43 * thereof, and that both notices appear in supporting documentation. 44 * 45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 48 * 49 * Carnegie Mellon requests users of this software to return to 50 * 51 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 52 * School of Computer Science 53 * Carnegie Mellon University 54 * Pittsburgh PA 15213-3890 55 * 56 * any improvements or extensions that they make and grant Carnegie the 57 * rights to redistribute these changes. 58 */ 59 60 #include "opt_dec_eb164.h" 61 #include "opt_dec_kn20aa.h" 62 #include "opt_dec_550.h" 63 #include "opt_dec_1000a.h" 64 #include "opt_dec_1000.h" 65 66 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 67 68 __KERNEL_RCSID(0, "$NetBSD: cia.c,v 1.69 2009/03/14 21:04:02 dsl Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/kernel.h> 73 #include <sys/malloc.h> 74 #include <sys/device.h> 75 76 #include <uvm/uvm_extern.h> 77 78 #include <machine/autoconf.h> 79 #include <machine/rpb.h> 80 #include <machine/sysarch.h> 81 #include <machine/alpha.h> 82 83 #include <dev/isa/isareg.h> 84 #include <dev/isa/isavar.h> 85 86 #include <dev/pci/pcireg.h> 87 #include <dev/pci/pcivar.h> 88 #include <alpha/pci/ciareg.h> 89 #include <alpha/pci/ciavar.h> 90 91 #ifdef DEC_KN20AA 92 #include <alpha/pci/pci_kn20aa.h> 93 #endif 94 #ifdef DEC_EB164 95 #include <alpha/pci/pci_eb164.h> 96 #endif 97 #ifdef DEC_550 98 #include <alpha/pci/pci_550.h> 99 #endif 100 #ifdef DEC_1000A 101 #include <alpha/pci/pci_1000a.h> 102 #endif 103 #ifdef DEC_1000 104 #include <alpha/pci/pci_1000.h> 105 #endif 106 107 int ciamatch(struct device *, struct cfdata *, void *); 108 void ciaattach(struct device *, struct device *, void *); 109 110 CFATTACH_DECL(cia, sizeof(struct cia_softc), 111 ciamatch, ciaattach, NULL, NULL); 112 113 extern struct cfdriver cia_cd; 114 115 int cia_bus_get_window(int, int, 116 struct alpha_bus_space_translation *); 117 118 /* There can be only one. */ 119 int ciafound; 120 struct cia_config cia_configuration; 121 122 /* 123 * This determines if we attempt to use BWX for PCI bus and config space 124 * access. Some systems, notably with Pyxis, don't fare so well unless 125 * BWX is used. 126 * 127 * EXCEPT! Some devices have a really hard time if BWX is used (WHY?!). 128 * So, we decouple the uses for PCI config space and PCI bus space. 129 * 130 * FURTHERMORE! The Pyxis, most notably earlier revs, really don't 131 * do so well if you don't use BWX for bus access. So we default to 132 * forcing BWX on those chips. 133 * 134 * Geez. 135 */ 136 137 #ifndef CIA_PCI_USE_BWX 138 #define CIA_PCI_USE_BWX 1 139 #endif 140 141 #ifndef CIA_BUS_USE_BWX 142 #define CIA_BUS_USE_BWX 0 143 #endif 144 145 #ifndef CIA_PYXIS_FORCE_BWX 146 #define CIA_PYXIS_FORCE_BWX 0 147 #endif 148 149 int cia_pci_use_bwx = CIA_PCI_USE_BWX; 150 int cia_bus_use_bwx = CIA_BUS_USE_BWX; 151 int cia_pyxis_force_bwx = CIA_PYXIS_FORCE_BWX; 152 153 int 154 ciamatch(struct device *parent, struct cfdata *match, void *aux) 155 { 156 struct mainbus_attach_args *ma = aux; 157 158 /* Make sure that we're looking for a CIA. */ 159 if (strcmp(ma->ma_name, cia_cd.cd_name) != 0) 160 return (0); 161 162 if (ciafound) 163 return (0); 164 165 return (1); 166 } 167 168 /* 169 * Set up the chipset's function pointers. 170 */ 171 void 172 cia_init(struct cia_config *ccp, int mallocsafe) 173 { 174 int pci_use_bwx = cia_pci_use_bwx; 175 int bus_use_bwx = cia_bus_use_bwx; 176 177 ccp->cc_hae_mem = REGVAL(CIA_CSR_HAE_MEM); 178 ccp->cc_hae_io = REGVAL(CIA_CSR_HAE_IO); 179 ccp->cc_rev = REGVAL(CIA_CSR_REV) & REV_MASK; 180 181 /* 182 * Determine if we have a Pyxis. Only two systypes can 183 * have this: the EB164 systype (AlphaPC164LX and AlphaPC164SX) 184 * and the DEC_550 systype (Miata). 185 */ 186 if ((cputype == ST_EB164 && 187 (hwrpb->rpb_variation & SV_ST_MASK) >= SV_ST_ALPHAPC164LX_400) || 188 cputype == ST_DEC_550) { 189 ccp->cc_flags |= CCF_ISPYXIS; 190 if (cia_pyxis_force_bwx) 191 pci_use_bwx = bus_use_bwx = 1; 192 } 193 194 /* 195 * ALCOR/ALCOR2 Revisions >= 2 and Pyxis have the CNFG register. 196 */ 197 if (ccp->cc_rev >= 2 || (ccp->cc_flags & CCF_ISPYXIS) != 0) 198 ccp->cc_cnfg = REGVAL(CIA_CSR_CNFG); 199 else 200 ccp->cc_cnfg = 0; 201 202 /* 203 * Use BWX iff: 204 * 205 * - It hasn't been disbled by the user, 206 * - it's enabled in CNFG, 207 * - we're implementation version ev5, 208 * - BWX is enabled in the CPU's capabilities mask 209 */ 210 if ((pci_use_bwx || bus_use_bwx) && 211 (ccp->cc_cnfg & CNFG_BWEN) != 0 && 212 (cpu_amask & ALPHA_AMASK_BWX) != 0) { 213 u_int32_t ctrl; 214 215 if (pci_use_bwx) 216 ccp->cc_flags |= CCF_PCI_USE_BWX; 217 if (bus_use_bwx) 218 ccp->cc_flags |= CCF_BUS_USE_BWX; 219 220 /* 221 * For whatever reason, the firmware seems to enable PCI 222 * loopback mode if it also enables BWX. Make sure it's 223 * enabled if we have an old, buggy firmware rev. 224 */ 225 alpha_mb(); 226 ctrl = REGVAL(CIA_CSR_CTRL); 227 if ((ctrl & CTRL_PCI_LOOP_EN) == 0) { 228 REGVAL(CIA_CSR_CTRL) = ctrl | CTRL_PCI_LOOP_EN; 229 alpha_mb(); 230 } 231 } 232 233 if (!ccp->cc_initted) { 234 /* don't do these twice since they set up extents */ 235 if (ccp->cc_flags & CCF_BUS_USE_BWX) { 236 cia_bwx_bus_io_init(&ccp->cc_iot, ccp); 237 cia_bwx_bus_mem_init(&ccp->cc_memt, ccp); 238 239 /* 240 * We have one window for both PCI I/O and MEM 241 * in BWX mode. 242 */ 243 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1; 244 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 1; 245 } else { 246 cia_swiz_bus_io_init(&ccp->cc_iot, ccp); 247 cia_swiz_bus_mem_init(&ccp->cc_memt, ccp); 248 249 /* 250 * We have two I/O windows and 4 MEM windows in 251 * SWIZ mode. 252 */ 253 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 2; 254 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 4; 255 } 256 alpha_bus_get_window = cia_bus_get_window; 257 } 258 ccp->cc_mallocsafe = mallocsafe; 259 260 cia_pci_init(&ccp->cc_pc, ccp); 261 alpha_pci_chipset = &ccp->cc_pc; 262 263 ccp->cc_initted = 1; 264 } 265 266 void 267 ciaattach(struct device *parent, struct device *self, void *aux) 268 { 269 struct cia_softc *sc = (struct cia_softc *)self; 270 struct cia_config *ccp; 271 struct pcibus_attach_args pba; 272 char bits[64]; 273 const char *name; 274 int pass; 275 276 /* note that we've attached the chipset; can't have 2 CIAs. */ 277 ciafound = 1; 278 279 /* 280 * set up the chipset's info; done once at console init time 281 * (maybe), but we must do it here as well to take care of things 282 * that need to use memory allocation. 283 */ 284 ccp = sc->sc_ccp = &cia_configuration; 285 cia_init(ccp, 1); 286 287 if (ccp->cc_flags & CCF_ISPYXIS) { 288 name = "Pyxis"; 289 pass = ccp->cc_rev; 290 } else { 291 name = "ALCOR/ALCOR2"; 292 pass = ccp->cc_rev + 1; 293 } 294 295 printf(": DECchip 2117x Core Logic Chipset (%s), pass %d\n", 296 name, pass); 297 if (ccp->cc_cnfg) { 298 snprintb(bits, sizeof(bits), CIA_CSR_CNFG_BITS, ccp->cc_cnfg); 299 printf("%s: extended capabilities: %s\n", self->dv_xname, bits); 300 } 301 302 switch (ccp->cc_flags & (CCF_PCI_USE_BWX|CCF_BUS_USE_BWX)) { 303 case CCF_PCI_USE_BWX|CCF_BUS_USE_BWX: 304 name = "PCI config and bus"; 305 break; 306 case CCF_PCI_USE_BWX: 307 name = "PCI config"; 308 break; 309 case CCF_BUS_USE_BWX: 310 name = "bus"; 311 break; 312 default: 313 name = NULL; 314 break; 315 } 316 if (name != NULL) 317 printf("%s: using BWX for %s access\n", self->dv_xname, name); 318 319 #ifdef DEC_550 320 if (cputype == ST_DEC_550 && 321 (hwrpb->rpb_variation & SV_ST_MASK) < SV_ST_MIATA_1_5) { 322 /* 323 * Miata 1 systems have a bug: DMA cannot cross 324 * an 8k boundary! Make sure PCI read prefetching 325 * is disabled on these chips. Note that secondary 326 * PCI busses don't have this problem, because of 327 * the way PPBs handle PCI read requests. 328 * 329 * In the 21174 Technical Reference Manual, this is 330 * actually documented as "Pyxis Pass 1", but apparently 331 * there are chips that report themselves as "Pass 1" 332 * which do not have the bug! Miatas with the Cypress 333 * PCI-ISA bridge (i.e. Miata 1.5 and Miata 2) do not 334 * have the bug, so we use this check. 335 * 336 * NOTE: This bug is actually worked around in cia_dma.c, 337 * when direct-mapped DMA maps are created. 338 * 339 * XXX WE NEED TO THINK ABOUT HOW TO HANDLE THIS FOR 340 * XXX SGMAP DMA MAPPINGS! 341 */ 342 u_int32_t ctrl; 343 344 /* XXX no bets... */ 345 printf("%s: WARNING: Pyxis pass 1 DMA bug; no bets...\n", 346 self->dv_xname); 347 348 ccp->cc_flags |= CCF_PYXISBUG; 349 350 alpha_mb(); 351 ctrl = REGVAL(CIA_CSR_CTRL); 352 ctrl &= ~(CTRL_RD_TYPE|CTRL_RL_TYPE|CTRL_RM_TYPE); 353 REGVAL(CIA_CSR_CTRL) = ctrl; 354 alpha_mb(); 355 } 356 #endif /* DEC_550 */ 357 358 cia_dma_init(ccp); 359 360 switch (cputype) { 361 #ifdef DEC_KN20AA 362 case ST_DEC_KN20AA: 363 pci_kn20aa_pickintr(ccp); 364 break; 365 #endif 366 367 #ifdef DEC_EB164 368 case ST_EB164: 369 pci_eb164_pickintr(ccp); 370 break; 371 #endif 372 373 #ifdef DEC_550 374 case ST_DEC_550: 375 pci_550_pickintr(ccp); 376 break; 377 #endif 378 379 #ifdef DEC_1000A 380 case ST_DEC_1000A: 381 pci_1000a_pickintr(ccp, &ccp->cc_iot, &ccp->cc_memt, 382 &ccp->cc_pc); 383 break; 384 #endif 385 386 #ifdef DEC_1000 387 case ST_DEC_1000: 388 pci_1000_pickintr(ccp, &ccp->cc_iot, &ccp->cc_memt, 389 &ccp->cc_pc); 390 break; 391 #endif 392 393 default: 394 panic("ciaattach: shouldn't be here, really..."); 395 } 396 397 pba.pba_iot = &ccp->cc_iot; 398 pba.pba_memt = &ccp->cc_memt; 399 pba.pba_dmat = 400 alphabus_dma_get_tag(&ccp->cc_dmat_direct, ALPHA_BUS_PCI); 401 pba.pba_dmat64 = NULL; 402 pba.pba_pc = &ccp->cc_pc; 403 pba.pba_bus = 0; 404 pba.pba_bridgetag = NULL; 405 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; 406 if ((ccp->cc_flags & CCF_PYXISBUG) == 0) 407 pba.pba_flags |= PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | 408 PCI_FLAGS_MWI_OKAY; 409 config_found_ia(self, "pcibus", &pba, pcibusprint); 410 } 411 412 int 413 cia_bus_get_window(int type, int window, struct alpha_bus_space_translation *abst) 414 { 415 struct cia_config *ccp = &cia_configuration; 416 bus_space_tag_t st; 417 418 switch (type) { 419 case ALPHA_BUS_TYPE_PCI_IO: 420 st = &ccp->cc_iot; 421 break; 422 423 case ALPHA_BUS_TYPE_PCI_MEM: 424 st = &ccp->cc_memt; 425 break; 426 427 default: 428 panic("cia_bus_get_window"); 429 } 430 431 return (alpha_bus_space_get_window(st, window, abst)); 432 } 433 434 void 435 cia_pyxis_intr_enable(int irq, int onoff) 436 { 437 u_int64_t imask; 438 int s; 439 440 #if 0 441 printf("cia_pyxis_intr_enable: %s %d\n", 442 onoff ? "enabling" : "disabling", irq); 443 #endif 444 445 s = splhigh(); 446 alpha_mb(); 447 imask = REGVAL64(PYXIS_INT_MASK); 448 if (onoff) 449 imask |= (1UL << irq); 450 else 451 imask &= ~(1UL << irq); 452 REGVAL64(PYXIS_INT_MASK) = imask; 453 alpha_mb(); 454 splx(s); 455 } 456
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