1 /* $OpenBSD: pci_kn300.c,v 1.6 2014/05/08 20:46:49 miod Exp $ */ 2 /* $NetBSD: pci_kn300.c,v 1.28 2005/12/11 12:16:17 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1998 by Matthew Jacob 6 * NASA AMES Research Center. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice immediately at the beginning of the file, without modification, 14 * this list of conditions, and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. 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 AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/types.h> 35 #include <sys/param.h> 36 #include <sys/time.h> 37 #include <sys/systm.h> 38 #include <sys/errno.h> 39 #include <sys/malloc.h> 40 #include <sys/device.h> 41 #include <sys/syslog.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <machine/autoconf.h> 46 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/pcivar.h> 49 50 #include <alpha/mcbus/mcbusvar.h> 51 #include <alpha/mcbus/mcbusreg.h> 52 #include <alpha/pci/mcpciareg.h> 53 #include <alpha/pci/mcpciavar.h> 54 #include <alpha/pci/pci_kn300.h> 55 56 #include "sio.h" 57 #if NSIO > 0 || NPCEB > 0 58 #include <alpha/pci/siovar.h> 59 #endif 60 61 int dec_kn300_intr_map(struct pci_attach_args *, pci_intr_handle_t *); 62 63 const char *dec_kn300_intr_string(void *, pci_intr_handle_t); 64 void *dec_kn300_intr_establish(void *, pci_intr_handle_t, 65 int, int (*func)(void *), void *, const char *); 66 void dec_kn300_intr_disestablish(void *, void *); 67 68 #define KN300_PCEB_IRQ 16 69 #define NPIN 4 70 71 #define NIRQ (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) 72 static int savirqs[NIRQ]; 73 74 static struct alpha_shared_intr *kn300_pci_intr; 75 76 static struct mcpcia_config *mcpcia_eisaccp = NULL; 77 78 void kn300_iointr (void *, unsigned long); 79 void kn300_enable_intr (struct mcpcia_config *, int); 80 void kn300_disable_intr (struct mcpcia_config *, int); 81 82 void 83 pci_kn300_pickintr(ccp, first) 84 struct mcpcia_config *ccp; 85 int first; 86 { 87 pci_chipset_tag_t pc = &ccp->cc_pc; 88 89 if (first) { 90 int g; 91 92 kn300_pci_intr = alpha_shared_intr_alloc(NIRQ); 93 for (g = 0; g < NIRQ; g++) { 94 alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25); 95 savirqs[g] = (char) -1; 96 } 97 } 98 99 pc->pc_intr_v = ccp; 100 pc->pc_intr_map = dec_kn300_intr_map; 101 pc->pc_intr_string = dec_kn300_intr_string; 102 pc->pc_intr_establish = dec_kn300_intr_establish; 103 pc->pc_intr_disestablish = dec_kn300_intr_disestablish; 104 105 /* Not supported on KN300. */ 106 pc->pc_pciide_compat_intr_establish = NULL; 107 108 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) { 109 mcpcia_eisaccp = ccp; 110 #if NSIO > 0 || NPCEB > 0 111 sio_intr_setup(pc, &ccp->cc_iot); 112 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 113 #endif 114 } 115 } 116 117 int 118 dec_kn300_intr_map(pa, ihp) 119 struct pci_attach_args *pa; 120 pci_intr_handle_t *ihp; 121 { 122 pcitag_t bustag = pa->pa_intrtag; 123 int buspin = pa->pa_intrpin; 124 pci_chipset_tag_t pc = pa->pa_pc; 125 struct mcpcia_config *ccp = (struct mcpcia_config *)pc->pc_intr_v; 126 int device; 127 int mcpcia_irq; 128 129 if (buspin == 0) { 130 /* No IRQ used. */ 131 return 1; 132 } 133 if (buspin > 4 || buspin < 0) { 134 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 135 return 1; 136 } 137 138 pci_decompose_tag(pc, bustag, NULL, &device, NULL); 139 140 /* 141 * On MID 5 device 1 is the internal NCR 53c810. 142 */ 143 if (ccp->cc_mid == 5 && device == 1) { 144 mcpcia_irq = 16; 145 } else if (device >= 2 && device <= 5) { 146 mcpcia_irq = (device - 2) * 4 + buspin - 1; 147 } else { 148 printf("dec_kn300_intr_map: weird device number %d\n", device); 149 return(1); 150 } 151 152 /* 153 * handle layout: 154 * 155 * Determine kn300 IRQ (encoded in SCB vector): 156 * bits 0..1 buspin-1 157 * bits 2..4 PCI Slot (0..7- yes, some don't exist) 158 * bits 5..7 MID-4 159 * bits 8..10 7-GID 160 * 161 * Software only: 162 * bits 11-15 MCPCIA IRQ 163 */ 164 *ihp = (pci_intr_handle_t) 165 (buspin - 1 ) | 166 ((device & 0x7) << 2) | 167 ((ccp->cc_mid - 4) << 5) | 168 ((7 - ccp->cc_gid) << 8) | 169 (mcpcia_irq << 11); 170 return (0); 171 } 172 173 const char * 174 dec_kn300_intr_string(ccv, ih) 175 void *ccv; 176 pci_intr_handle_t ih; 177 { 178 static char irqstr[64]; 179 int irq; 180 181 irq = ih & 0x3ff; 182 if (irq >= NIRQ) 183 panic("dec_kn300_intr_string: bogus kn300 IRQ 0x%x", irq); 184 185 snprintf(irqstr, sizeof irqstr, "kn300 irq %d", irq); 186 187 return (irqstr); 188 } 189 190 void * 191 dec_kn300_intr_establish(ccv, ih, level, func, arg, name) 192 void *ccv, *arg; 193 pci_intr_handle_t ih; 194 int level; 195 int (*func) (void *); 196 const char *name; 197 { 198 struct mcpcia_config *ccp = ccv; 199 void *cookie; 200 int irq; 201 202 irq = ih & 0x3ff; 203 if (irq >= NIRQ) 204 panic("dec_kn300_intr_establish: bogus kn300 IRQ 0x%x", irq); 205 206 cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL, 207 level, func, arg, "kn300 irq"); 208 209 if (cookie != NULL && 210 alpha_shared_intr_firstactive(kn300_pci_intr, irq)) { 211 scb_set(MCPCIA_VEC_PCI + SCB_IDXTOVEC(irq), 212 kn300_iointr, NULL); 213 alpha_shared_intr_set_private(kn300_pci_intr, irq, ccp); 214 savirqs[irq] = (ih >> 11) & 0x1f; 215 kn300_enable_intr(ccp, savirqs[irq]); 216 alpha_mb(); 217 } 218 return (cookie); 219 } 220 221 void 222 dec_kn300_intr_disestablish(ccv, cookie) 223 void *ccv, *cookie; 224 { 225 panic("dec_kn300_intr_disestablish not implemented"); 226 } 227 228 void 229 kn300_iointr(arg, vec) 230 void *arg; 231 unsigned long vec; 232 { 233 struct mcpcia_softc *mcp; 234 u_long irq; 235 236 irq = SCB_VECTOIDX(vec - MCPCIA_VEC_PCI); 237 238 if (alpha_shared_intr_dispatch(kn300_pci_intr, irq)) { 239 /* 240 * Any claim of an interrupt at this level is a hint to 241 * reset the stray interrupt count- elsewise a slow leak 242 * over time will cause this level to be shutdown. 243 */ 244 alpha_shared_intr_reset_strays(kn300_pci_intr, irq); 245 return; 246 } 247 248 /* 249 * If we haven't finished configuring yet, or there is no mcp 250 * registered for this level yet, just return. 251 */ 252 mcp = alpha_shared_intr_get_private(kn300_pci_intr, irq); 253 if (mcp == NULL || mcp->mcpcia_cc == NULL) 254 return; 255 256 /* 257 * We're getting an interrupt for a device we haven't enabled. 258 * We had better not try and use -1 to find the right bit to disable. 259 */ 260 if (savirqs[irq] == -1) { 261 printf("kn300_iointr: stray interrupt vector 0x%lx\n", vec); 262 return; 263 } 264 265 /* 266 * Stray interrupt; disable the IRQ on the appropriate MCPCIA 267 * if we've reached the limit. 268 */ 269 alpha_shared_intr_stray(kn300_pci_intr, irq, "kn300 irq"); 270 if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0) 271 return; 272 kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]); 273 } 274 275 void 276 kn300_enable_intr(ccp, irq) 277 struct mcpcia_config *ccp; 278 int irq; 279 { 280 alpha_mb(); 281 REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq); 282 alpha_mb(); 283 } 284 285 void 286 kn300_disable_intr(ccp, irq) 287 struct mcpcia_config *ccp; 288 int irq; 289 { 290 alpha_mb(); 291 REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq); 292 alpha_mb(); 293 } 294