1 /* $NetBSD: kdb.c,v 1.47 2010/01/16 18:43:34 dyoung Exp $ */ 2 /* 3 * Copyright (c) 1996 Ludd, University of Lule}, Sweden. 4 * 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 at Ludd, University of 17 * Lule}, Sweden and its contributors. 18 * 4. The name of the author 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 THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * KDB50 disk device driver 35 */ 36 /* 37 * TODO 38 * Implement node reset routine. 39 * Nices hardware error handling. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: kdb.c,v 1.47 2010/01/16 18:43:34 dyoung Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/kernel.h> 47 #include <sys/buf.h> 48 #include <sys/bufq.h> 49 #include <sys/device.h> 50 #include <sys/proc.h> 51 #include <sys/malloc.h> 52 #include <sys/systm.h> 53 #include <sys/sched.h> 54 55 #include <uvm/uvm_extern.h> 56 57 #ifdef __vax__ 58 #include <machine/pte.h> 59 #include <machine/pcb.h> 60 #endif 61 #include <sys/bus.h> 62 63 #include <dev/bi/bireg.h> 64 #include <dev/bi/bivar.h> 65 #include <dev/bi/kdbreg.h> 66 67 #include <dev/mscp/mscp.h> 68 #include <dev/mscp/mscpreg.h> 69 #include <dev/mscp/mscpvar.h> 70 71 #include "locators.h" 72 73 #define KDB_WL(adr, val) bus_space_write_4(sc->sc_iot, sc->sc_ioh, adr, val) 74 #define KDB_RL(adr) bus_space_read_4(sc->sc_iot, sc->sc_ioh, adr) 75 #define KDB_RS(adr) bus_space_read_2(sc->sc_iot, sc->sc_ioh, adr) 76 77 #define b_forw b_hash.le_next 78 /* 79 * Software status, per controller. 80 */ 81 struct kdb_softc { 82 device_t sc_dev; /* Autoconfig info */ 83 struct evcnt sc_intrcnt; /* Interrupt counting */ 84 void *sc_kdb; /* Struct for kdb communication */ 85 struct mscp_softc *sc_softc; /* MSCP info (per mscpvar.h) */ 86 bus_dma_tag_t sc_dmat; 87 bus_dmamap_t sc_cmap; /* Control structures */ 88 bus_space_tag_t sc_iot; 89 bus_space_handle_t sc_ioh; 90 }; 91 92 int kdbmatch(device_t, cfdata_t, void *); 93 void kdbattach(device_t, device_t, void *); 94 void kdbreset(int); 95 void kdbintr(void *); 96 void kdbctlrdone(device_t); 97 int kdbprint(void *, const char *); 98 void kdbsaerror(device_t, int); 99 void kdbgo(device_t, struct mscp_xi *); 100 101 CFATTACH_DECL_NEW(kdb, sizeof(struct kdb_softc), 102 kdbmatch, kdbattach, NULL, NULL); 103 104 /* 105 * More driver definitions, for generic MSCP code. 106 */ 107 struct mscp_ctlr kdb_mscp_ctlr = { 108 kdbctlrdone, 109 kdbgo, 110 kdbsaerror, 111 }; 112 113 int 114 kdbprint(void *aux, const char *name) 115 { 116 if (name) 117 aprint_normal("%s: mscpbus", name); 118 return UNCONF; 119 } 120 121 /* 122 * Poke at a supposed KDB to see if it is there. 123 */ 124 int 125 kdbmatch(device_t parent, cfdata_t cf, void *aux) 126 { 127 struct bi_attach_args *ba = aux; 128 129 if (bus_space_read_2(ba->ba_iot, ba->ba_ioh, BIREG_DTYPE) != BIDT_KDB50) 130 return 0; 131 132 if (cf->cf_loc[BICF_NODE] != BICF_NODE_DEFAULT && 133 cf->cf_loc[BICF_NODE] != ba->ba_nodenr) 134 return 0; 135 136 return 1; 137 } 138 139 void 140 kdbattach(device_t parent, device_t self, void *aux) 141 { 142 struct kdb_softc *sc = device_private(self); 143 struct bi_attach_args *ba = aux; 144 struct mscp_attach_args ma; 145 volatile int i = 10000; 146 int error, rseg; 147 bus_dma_segment_t seg; 148 149 sc->sc_dev = self; 150 151 printf("\n"); 152 bi_intr_establish(ba->ba_icookie, ba->ba_ivec, 153 kdbintr, sc, &sc->sc_intrcnt); 154 evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 155 device_xname(sc->sc_dev), "intr"); 156 157 sc->sc_iot = ba->ba_iot; 158 sc->sc_ioh = ba->ba_ioh; 159 sc->sc_dmat = ba->ba_dmat; 160 161 /* 162 * Map the communication area and command and 163 * response packets into Unibus space. 164 */ 165 if ((error = bus_dmamem_alloc(sc->sc_dmat, sizeof(struct mscp_pack), 166 PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 167 printf("Alloc ctrl area %d\n", error); 168 return; 169 } 170 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 171 sizeof(struct mscp_pack), &sc->sc_kdb, 172 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 173 printf("Map ctrl area %d\n", error); 174 err: bus_dmamem_free(sc->sc_dmat, &seg, rseg); 175 return; 176 } 177 if ((error = bus_dmamap_create(sc->sc_dmat, sizeof(struct mscp_pack), 178 1, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT, &sc->sc_cmap))) { 179 printf("Create DMA map %d\n", error); 180 err2: bus_dmamem_unmap(sc->sc_dmat, sc->sc_kdb, 181 sizeof(struct mscp_pack)); 182 goto err; 183 } 184 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cmap, 185 sc->sc_kdb, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT))) { 186 printf("Load ctrl map %d\n", error); 187 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cmap); 188 goto err2; 189 } 190 memset(sc->sc_kdb, 0, sizeof(struct mscp_pack)); 191 192 ma.ma_mc = &kdb_mscp_ctlr; 193 ma.ma_type = MSCPBUS_DISK|MSCPBUS_KDB; 194 ma.ma_uda = (struct mscp_pack *)sc->sc_kdb; 195 ma.ma_softc = &sc->sc_softc; 196 ma.ma_iot = sc->sc_iot; 197 ma.ma_iph = sc->sc_ioh + KDB_IP; 198 ma.ma_sah = sc->sc_ioh + KDB_SA; 199 ma.ma_swh = sc->sc_ioh + KDB_SW; 200 ma.ma_dmat = sc->sc_dmat; 201 ma.ma_dmam = sc->sc_cmap; 202 ma.ma_ivec = ba->ba_ivec; 203 ma.ma_ctlrnr = ba->ba_nodenr; 204 ma.ma_adapnr = ba->ba_busnr; 205 206 KDB_WL(BIREG_VAXBICSR, KDB_RL(BIREG_VAXBICSR) | BICSR_NRST); 207 while (i--) /* Need delay??? */ 208 ; 209 KDB_WL(BIREG_INTRDES, ba->ba_intcpu); /* Interrupt on CPU # */ 210 KDB_WL(BIREG_BCICSR, KDB_RL(BIREG_BCICSR) | 211 BCI_STOPEN | BCI_IDENTEN | BCI_UINTEN | BCI_INTEN); 212 KDB_WL(BIREG_UINTRCSR, ba->ba_ivec); 213 config_found(sc->sc_dev, &ma, kdbprint); 214 } 215 216 void 217 kdbgo(device_t usc, struct mscp_xi *mxi) 218 { 219 struct kdb_softc *sc = device_private(usc); 220 struct buf *bp = mxi->mxi_bp; 221 struct mscp *mp = mxi->mxi_mp; 222 u_int32_t addr = (u_int32_t)bp->b_data; 223 u_int32_t mapaddr; 224 int err; 225 226 /* 227 * The KDB50 wants to read VAX Page tables directly, therefore 228 * the result from bus_dmamap_load() is uninteresting. (But it 229 * should never fail!). 230 * 231 * On VAX, point to the corresponding page tables. (user/sys) 232 * On other systems, do something else... 233 */ 234 err = bus_dmamap_load(sc->sc_dmat, mxi->mxi_dmam, bp->b_data, 235 bp->b_bcount, (bp->b_flags & B_PHYS ? bp->b_proc : 0), 236 BUS_DMA_NOWAIT); 237 238 if (err) /* Shouldn't happen */ 239 panic("kdbgo: bus_dmamap_load: error %d", err); 240 241 #ifdef __vax__ 242 /* 243 * Get a pointer to the pte pointing out the first virtual address. 244 * Use different ways in kernel and user space. 245 */ 246 if ((bp->b_flags & B_PHYS) == 0) { 247 mapaddr = ((u_int32_t)kvtopte(addr)) & ~KERNBASE; 248 } else { 249 250 /* XXX: This code does not belong here! */ 251 #define UVTOPTE(addr, pmap) (((addr) < 0x40000000) ? \ 252 &(*pmap)->pm_p0br[PG_PFNUM(addr)] : &(*pmap)->pm_p1br[PG_PFNUM(addr)]) 253 254 pmap_t *pmap = &bp->b_proc->p_vmspace->vm_map.pmap; 255 u_int32_t eaddr = addr + (bp->b_bcount - 1); 256 u_int32_t emapaddr = (u_int32_t)UVTOPTE(eaddr, pmap); 257 258 mapaddr = (u_int32_t)UVTOPTE(addr, pmap); 259 if (trunc_page(mapaddr) != trunc_page(emapaddr)) { 260 mp->mscp_seq.seq_bytecount = 261 (((round_page(mapaddr) - mapaddr)/4) * 512); 262 } 263 mapaddr = kvtophys(mapaddr); 264 } 265 #else 266 #error Must write code to handle KDB50 on non-vax. 267 #endif 268 269 mp->mscp_seq.seq_mapbase = mapaddr; 270 mxi->mxi_dmam->dm_segs[0].ds_addr = (addr & 511) | KDB_MAP; 271 mscp_dgo(sc->sc_softc, mxi); 272 } 273 274 void 275 kdbsaerror(device_t usc, int doreset) 276 { 277 struct kdb_softc *sc = device_private(usc); 278 279 if ((KDB_RS(KDB_SA) & MP_ERR) == 0) 280 return; 281 printf("%s: controller error, sa=0x%x\n", device_xname(sc->sc_dev), 282 KDB_RS(KDB_SA)); 283 /* What to do now??? */ 284 } 285 286 /* 287 * Interrupt routine. Depending on the state of the controller, 288 * continue initialisation, or acknowledge command and response 289 * interrupts, and process responses. 290 */ 291 void 292 kdbintr(void *arg) 293 { 294 struct kdb_softc *sc = arg; 295 296 if (KDB_RS(KDB_SA) & MP_ERR) { /* ctlr fatal error */ 297 kdbsaerror(sc->sc_dev, 1); 298 return; 299 } 300 KERNEL_LOCK(1, NULL); 301 mscp_intr(sc->sc_softc); 302 KERNEL_UNLOCK_ONE(NULL); 303 } 304 305 void 306 kdbctlrdone(device_t usc) 307 { 308 } 309