1 /* $OpenBSD: pci_kn300.c,v 1.7 2015/07/26 05:09:44 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 #include <dev/pci/ppbreg.h> 50 51 #include <alpha/mcbus/mcbusvar.h> 52 #include <alpha/mcbus/mcbusreg.h> 53 #include <alpha/pci/mcpciareg.h> 54 #include <alpha/pci/mcpciavar.h> 55 #include <alpha/pci/pci_kn300.h> 56 57 #include "sio.h" 58 #if NSIO > 0 || NPCEB > 0 59 #include <alpha/pci/siovar.h> 60 #endif 61 62 int dec_kn300_intr_map(struct pci_attach_args *, pci_intr_handle_t *); 63 64 const char *dec_kn300_intr_string(void *, pci_intr_handle_t); 65 void *dec_kn300_intr_establish(void *, pci_intr_handle_t, 66 int, int (*func)(void *), void *, const char *); 67 void dec_kn300_intr_disestablish(void *, void *); 68 69 #define KN300_PCEB_IRQ 16 70 #define NPIN 4 71 72 #define NIRQ (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) 73 static int savirqs[NIRQ]; 74 75 static struct alpha_shared_intr *kn300_pci_intr; 76 77 static struct mcpcia_config *mcpcia_eisaccp = NULL; 78 79 void kn300_iointr (void *, unsigned long); 80 void kn300_enable_intr (struct mcpcia_config *, int); 81 void kn300_disable_intr (struct mcpcia_config *, int); 82 83 void 84 pci_kn300_pickintr(ccp, first) 85 struct mcpcia_config *ccp; 86 int first; 87 { 88 pci_chipset_tag_t pc = &ccp->cc_pc; 89 90 if (first) { 91 int g; 92 93 kn300_pci_intr = alpha_shared_intr_alloc(NIRQ); 94 for (g = 0; g < NIRQ; g++) { 95 alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25); 96 savirqs[g] = (char) -1; 97 } 98 } 99 100 pc->pc_intr_v = ccp; 101 pc->pc_intr_map = dec_kn300_intr_map; 102 pc->pc_intr_string = dec_kn300_intr_string; 103 pc->pc_intr_establish = dec_kn300_intr_establish; 104 pc->pc_intr_disestablish = dec_kn300_intr_disestablish; 105 106 /* Not supported on KN300. */ 107 pc->pc_pciide_compat_intr_establish = NULL; 108 109 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) { 110 mcpcia_eisaccp = ccp; 111 #if NSIO > 0 || NPCEB > 0 112 sio_intr_setup(pc, &ccp->cc_iot); 113 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 114 #endif 115 } 116 } 117 118 int 119 dec_kn300_intr_map(pa, ihp) 120 struct pci_attach_args *pa; 121 pci_intr_handle_t *ihp; 122 { 123 pcitag_t bustag = pa->pa_intrtag; 124 int buspin = pa->pa_intrpin; 125 pci_chipset_tag_t pc = pa->pa_pc; 126 struct mcpcia_config *ccp = (struct mcpcia_config *)pc->pc_intr_v; 127 int device; 128 int mcpcia_irq; 129 130 if (pa->pa_bridgetag) { 131 buspin = PPB_INTERRUPT_SWIZZLE(pa->pa_rawintrpin, 132 pa->pa_device); 133 if (pa->pa_bridgeih[buspin - 1] != 0) { 134 *ihp = pa->pa_bridgeih[buspin - 1]; 135 return 0; 136 } 137 138 return 1; 139 } 140 141 pci_decompose_tag(pc, bustag, NULL, &device, NULL); 142 143 /* 144 * On MID 5 device 1 is the internal NCR 53c810. 145 */ 146 if (ccp->cc_mid == 5 && device == 1) { 147 mcpcia_irq = 16; 148 } else if (device >= 2 && device <= 5) { 149 mcpcia_irq = (device - 2) * 4 + buspin - 1; 150 } else { 151 printf("dec_kn300_intr_map: don't know how to setup %d/%d/%d\n", 152 pa->pa_bus, pa->pa_device, pa->pa_function); 153 return 1; 154 } 155 156 /* 157 * handle layout: 158 * 159 * Determine kn300 IRQ (encoded in SCB vector): 160 * bits 0..1 buspin-1 161 * bits 2..4 PCI Slot (0..7- yes, some don't exist) 162 * bits 5..7 MID-4 163 * bits 8..10 7-GID 164 * 165 * Software only: 166 * bits 11-15 MCPCIA IRQ 167 */ 168 *ihp = (pci_intr_handle_t) 169 (buspin - 1 ) | 170 ((device & 0x7) << 2) | 171 ((ccp->cc_mid - 4) << 5) | 172 ((7 - ccp->cc_gid) << 8) | 173 (mcpcia_irq << 11); 174 175 return (0); 176 } 177 178 const char * 179 dec_kn300_intr_string(ccv, ih) 180 void *ccv; 181 pci_intr_handle_t ih; 182 { 183 static char irqstr[64]; 184 int irq; 185 186 irq = ih & 0x3ff; 187 if (irq >= NIRQ) 188 panic("dec_kn300_intr_string: bogus kn300 IRQ 0x%x", irq); 189 190 snprintf(irqstr, sizeof irqstr, "kn300 irq %d", irq); 191 192 return (irqstr); 193 } 194 195 void * 196 dec_kn300_intr_establish(ccv, ih, level, func, arg, name) 197 void *ccv, *arg; 198 pci_intr_handle_t ih; 199 int level; 200 int (*func) (void *); 201 const char *name; 202 { 203 struct mcpcia_config *ccp = ccv; 204 void *cookie; 205 int irq; 206 207 irq = ih & 0x3ff; 208 if (irq >= NIRQ) 209 panic("dec_kn300_intr_establish: bogus kn300 IRQ 0x%x", irq); 210 211 cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL, 212 level, func, arg, "kn300 irq"); 213 214 if (cookie != NULL && 215 alpha_shared_intr_firstactive(kn300_pci_intr, irq)) { 216 scb_set(MCPCIA_VEC_PCI + SCB_IDXTOVEC(irq), 217 kn300_iointr, NULL); 218 alpha_shared_intr_set_private(kn300_pci_intr, irq, ccp); 219 savirqs[irq] = (ih >> 11) & 0x1f; 220 kn300_enable_intr(ccp, savirqs[irq]); 221 alpha_mb(); 222 } 223 return (cookie); 224 } 225 226 void 227 dec_kn300_intr_disestablish(ccv, cookie) 228 void *ccv, *cookie; 229 { 230 panic("dec_kn300_intr_disestablish not implemented"); 231 } 232 233 void 234 kn300_iointr(arg, vec) 235 void *arg; 236 unsigned long vec; 237 { 238 struct mcpcia_softc *mcp; 239 u_long irq; 240 241 irq = SCB_VECTOIDX(vec - MCPCIA_VEC_PCI); 242 243 if (alpha_shared_intr_dispatch(kn300_pci_intr, irq)) { 244 /* 245 * Any claim of an interrupt at this level is a hint to 246 * reset the stray interrupt count- elsewise a slow leak 247 * over time will cause this level to be shutdown. 248 */ 249 alpha_shared_intr_reset_strays(kn300_pci_intr, irq); 250 return; 251 } 252 253 /* 254 * If we haven't finished configuring yet, or there is no mcp 255 * registered for this level yet, just return. 256 */ 257 mcp = alpha_shared_intr_get_private(kn300_pci_intr, irq); 258 if (mcp == NULL || mcp->mcpcia_cc == NULL) 259 return; 260 261 /* 262 * We're getting an interrupt for a device we haven't enabled. 263 * We had better not try and use -1 to find the right bit to disable. 264 */ 265 if (savirqs[irq] == -1) { 266 printf("kn300_iointr: stray interrupt vector 0x%lx\n", vec); 267 return; 268 } 269 270 /* 271 * Stray interrupt; disable the IRQ on the appropriate MCPCIA 272 * if we've reached the limit. 273 */ 274 alpha_shared_intr_stray(kn300_pci_intr, irq, "kn300 irq"); 275 if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0) 276 return; 277 kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]); 278 } 279 280 void 281 kn300_enable_intr(ccp, irq) 282 struct mcpcia_config *ccp; 283 int irq; 284 { 285 alpha_mb(); 286 REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq); 287 alpha_mb(); 288 } 289 290 void 291 kn300_disable_intr(ccp, irq) 292 struct mcpcia_config *ccp; 293 int irq; 294 { 295 alpha_mb(); 296 REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq); 297 alpha_mb(); 298 } 299