mcpcia.c revision 1.32
1 /* $NetBSD: mcpcia.c,v 1.32 2021/06/18 22:17:53 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 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) 1998 by Matthew Jacob 35 * NASA AMES Research Center. 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice immediately at the beginning of the file, without modification, 43 * this list of conditions, and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. The name of the author may not be used to endorse or promote products 48 * derived from this software without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 54 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 /* 64 * MCPCIA mcbus to PCI bus adapter 65 * found on AlphaServer 4100 systems. 66 */ 67 68 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 69 70 __KERNEL_RCSID(0, "$NetBSD: mcpcia.c,v 1.32 2021/06/18 22:17:53 thorpej Exp $"); 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/device.h> 75 #include <sys/kmem.h> 76 77 #include <machine/autoconf.h> 78 #include <machine/rpb.h> 79 #include <machine/sysarch.h> 80 81 #include <alpha/mcbus/mcbusreg.h> 82 #include <alpha/mcbus/mcbusvar.h> 83 #include <alpha/pci/mcpciareg.h> 84 #include <alpha/pci/mcpciavar.h> 85 #include <alpha/pci/pci_kn300.h> 86 87 #define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr))) 88 #define MCPCIA_SYSBASE(mc) \ 89 ((((unsigned long) (mc)->cc_gid) << MCBUS_GID_SHIFT) | \ 90 (((unsigned long) (mc)->cc_mid) << MCBUS_MID_SHIFT) | \ 91 (MCBUS_IOSPACE)) 92 93 #define MCPCIA_PROBE(mid, gid) \ 94 badaddr((void *)KV(((((unsigned long) gid) << MCBUS_GID_SHIFT) | \ 95 (((unsigned long) mid) << MCBUS_MID_SHIFT) | \ 96 (MCBUS_IOSPACE) | MCPCIA_PCI_BRIDGE | _MCPCIA_PCI_REV)), \ 97 sizeof(uint32_t)) 98 99 static int mcpciamatch(device_t, cfdata_t, void *); 100 static void mcpciaattach(device_t, device_t, void *); 101 102 CFATTACH_DECL_NEW(mcpcia, sizeof(struct mcpcia_softc), 103 mcpciamatch, mcpciaattach, NULL, NULL); 104 105 void mcpcia_init0(struct mcpcia_config *, int); 106 107 /* 108 * We have one statically-allocated mcpcia_config structure; this is 109 * the one used for the console (which, coincidentally, is the only 110 * MCPCIA with an EISA adapter attached to it). 111 */ 112 struct mcpcia_config mcpcia_console_configuration; 113 114 static int mcpcia_bus_get_window(int, int, 115 struct alpha_bus_space_translation *abst); 116 117 static int 118 mcpciamatch(device_t parent, cfdata_t cf, void *aux) 119 { 120 struct mcbus_dev_attach_args *ma = aux; 121 if (ma->ma_type == MCBUS_TYPE_PCI) 122 return (1); 123 return (0); 124 } 125 126 static void 127 mcpciaattach(device_t parent, device_t self, void *aux) 128 { 129 static int first = 1; 130 struct mcbus_dev_attach_args *ma = aux; 131 struct mcpcia_softc *mcp = device_private(self); 132 struct mcpcia_config *ccp; 133 struct pcibus_attach_args pba; 134 uint32_t ctl; 135 136 /* 137 * Make sure this MCPCIA exists... 138 */ 139 if (MCPCIA_PROBE(ma->ma_mid, ma->ma_gid)) { 140 mcp->mcpcia_cc = NULL; 141 printf(" (not present)\n"); 142 return; 143 } 144 printf("\n"); 145 146 /* 147 * Determine if we're the console's MCPCIA. 148 */ 149 if (ma->ma_mid == mcpcia_console_configuration.cc_mid && 150 ma->ma_gid == mcpcia_console_configuration.cc_gid) 151 ccp = &mcpcia_console_configuration; 152 else { 153 ccp = kmem_zalloc(sizeof(struct mcpcia_config), KM_SLEEP); 154 ccp->cc_mid = ma->ma_mid; 155 ccp->cc_gid = ma->ma_gid; 156 } 157 158 mcp->mcpcia_dev = self; 159 mcp->mcpcia_cc = ccp; 160 ccp->cc_sc = mcp; 161 162 /* This initializes cc_sysbase so we can do register access. */ 163 mcpcia_init0(ccp, 1); 164 165 ctl = REGVAL(MCPCIA_PCI_REV(ccp)); 166 aprint_normal_dev(self, 167 "Horse Revision %d, %s Handed Saddle Revision %d," 168 " CAP Revision %d\n", HORSE_REV(ctl), 169 (SADDLE_TYPE(ctl) & 1)? "Right": "Left", SADDLE_REV(ctl), 170 CAP_REV(ctl)); 171 172 mcpcia_dma_init(ccp); 173 174 /* 175 * Set up interrupts 176 */ 177 pci_kn300_pickintr(ccp, first); 178 first = 0; 179 180 /* 181 * Attach PCI bus 182 */ 183 pba.pba_iot = &ccp->cc_iot; 184 pba.pba_memt = &ccp->cc_memt; 185 pba.pba_dmat = /* start with direct, may change... */ 186 alphabus_dma_get_tag(&ccp->cc_dmat_direct, ALPHA_BUS_PCI); 187 pba.pba_dmat64 = NULL; 188 pba.pba_pc = &ccp->cc_pc; 189 pba.pba_bus = 0; 190 pba.pba_bridgetag = NULL; 191 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY | 192 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY; 193 config_found(self, &pba, pcibusprint, CFARG_EOL); 194 195 /* 196 * Clear any errors that may have occurred during the probe 197 * sequence. 198 */ 199 REGVAL(MCPCIA_CAP_ERR(ccp)) = 0xFFFFFFFF; 200 alpha_mb(); 201 } 202 203 void 204 mcpcia_init(void) 205 { 206 struct mcpcia_config *ccp = &mcpcia_console_configuration; 207 int i; 208 209 /* 210 * Look for all of the MCPCIAs on the system. One of them 211 * will have an EISA attached to it. This MCPCIA is the 212 * only one that can be used for the console. Once we find 213 * that one, initialize it. 214 */ 215 216 for (i = 0; i < MCPCIA_PER_MCBUS; i++) { 217 ccp->cc_mid = mcbus_mcpcia_probe_order[i]; 218 /* 219 * XXX If we ever support more than one MCBUS, we'll 220 * XXX have to probe for them, and map them to unit 221 * XXX numbers. 222 */ 223 ccp->cc_gid = MCBUS_GID_FROM_INSTANCE(0); 224 ccp->cc_sysbase = MCPCIA_SYSBASE(ccp); 225 226 if (badaddr((void *)ALPHA_PHYS_TO_K0SEG(MCPCIA_PCI_REV(ccp)), 227 sizeof(uint32_t))) 228 continue; 229 230 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) { 231 mcpcia_init0(ccp, 0); 232 233 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 2; 234 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3; 235 236 alpha_bus_get_window = mcpcia_bus_get_window; 237 return; 238 } 239 } 240 241 panic("mcpcia_init: unable to find EISA bus"); 242 } 243 244 void 245 mcpcia_init0(struct mcpcia_config *ccp, int mallocsafe) 246 { 247 uint32_t ctl; 248 249 if (ccp->cc_initted == 0) { 250 /* don't do these twice since they set up extents */ 251 mcpcia_bus_io_init(&ccp->cc_iot, ccp); 252 mcpcia_bus_mem_init(&ccp->cc_memt, ccp); 253 } 254 ccp->cc_mallocsafe = mallocsafe; 255 256 mcpcia_pci_init(&ccp->cc_pc, ccp); 257 258 /* 259 * Establish a precalculated base for convenience's sake. 260 */ 261 ccp->cc_sysbase = MCPCIA_SYSBASE(ccp); 262 263 /* 264 * Disable interrupts and clear errors prior to probing 265 */ 266 REGVAL(MCPCIA_INT_MASK0(ccp)) = 0; 267 REGVAL(MCPCIA_INT_MASK1(ccp)) = 0; 268 REGVAL(MCPCIA_CAP_ERR(ccp)) = 0xFFFFFFFF; 269 alpha_mb(); 270 271 if (ccp == &mcpcia_console_configuration) { 272 /* 273 * Use this opportunity to also find out the MID and CPU 274 * type of the currently running CPU (that's us, billybob....) 275 */ 276 ctl = REGVAL(MCPCIA_WHOAMI(ccp)); 277 mcbus_primary.mcbus_cpu_mid = MCBUS_CPU_MID(ctl); 278 if ((MCBUS_CPU_INFO(ctl) & CPU_Fill_Err) == 0 && 279 mcbus_primary.mcbus_valid == 0) { 280 mcbus_primary.mcbus_bcache = 281 MCBUS_CPU_INFO(ctl) & CPU_BCacheMask; 282 mcbus_primary.mcbus_valid = 1; 283 } 284 alpha_mb(); 285 } 286 287 ccp->cc_initted = 1; 288 } 289 290 #ifdef TEST_PROBE_DEATH 291 static void 292 die_heathen_dog(void *arg) 293 { 294 struct mcpcia_config *ccp = arg; 295 296 /* this causes a fatal machine check (0x670) */ 297 REGVAL(MCPCIA_CAP_DIAG(ccp)) |= CAP_DIAG_MC_ADRPE; 298 } 299 #endif 300 301 void 302 mcpcia_config_cleanup(void) 303 { 304 volatile uint32_t ctl; 305 struct mcpcia_softc *mcp; 306 struct mcpcia_config *ccp; 307 int i; 308 extern struct cfdriver mcpcia_cd; 309 310 /* 311 * Turn on Hard, Soft error interrupts. Maybe i2c too. 312 */ 313 for (i = 0; i < mcpcia_cd.cd_ndevs; i++) { 314 if ((mcp = device_lookup_private(&mcpcia_cd, i)) == NULL) 315 continue; 316 317 ccp = mcp->mcpcia_cc; 318 if (ccp == NULL) 319 continue; 320 321 ctl = REGVAL(MCPCIA_INT_MASK0(ccp)); 322 ctl |= MCPCIA_GEN_IENABL; 323 REGVAL(MCPCIA_INT_MASK0(ccp)) = ctl; 324 alpha_mb(); 325 326 /* force stall while write completes */ 327 ctl = REGVAL(MCPCIA_INT_MASK0(ccp)); 328 } 329 #ifdef TEST_PROBE_DEATH 330 (void) timeout (die_heathen_dog, &mcpcia_console_configuration, 331 30 * hz); 332 #endif 333 } 334 335 static int 336 mcpcia_bus_get_window(int type, int window, 337 struct alpha_bus_space_translation *abst) 338 { 339 struct mcpcia_config *ccp = &mcpcia_console_configuration; 340 bus_space_tag_t st; 341 342 switch (type) { 343 case ALPHA_BUS_TYPE_PCI_IO: 344 st = &ccp->cc_iot; 345 break; 346 347 case ALPHA_BUS_TYPE_PCI_MEM: 348 st = &ccp->cc_memt; 349 break; 350 351 default: 352 panic("mcpcia_bus_get_window"); 353 } 354 355 return (alpha_bus_space_get_window(st, window, abst)); 356 } 357
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