1 /* $OpenBSD: pci_kn300.c,v 1.8 2017/09/08 05:36:51 deraadt 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/param.h>
35 #include <sys/time.h>
36 #include <sys/systm.h>
37 #include <sys/errno.h>
38 #include <sys/malloc.h>
39 #include <sys/device.h>
40 #include <sys/syslog.h>
41
42 #include <uvm/uvm_extern.h>
43
44 #include <machine/autoconf.h>
45
46 #include <dev/pci/pcireg.h>
47 #include <dev/pci/pcivar.h>
48 #include <dev/pci/ppbreg.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
pci_kn300_pickintr(ccp,first)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
dec_kn300_intr_map(pa,ihp)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 (pa->pa_bridgetag) {
130 buspin = PPB_INTERRUPT_SWIZZLE(pa->pa_rawintrpin,
131 pa->pa_device);
132 if (pa->pa_bridgeih[buspin - 1] != 0) {
133 *ihp = pa->pa_bridgeih[buspin - 1];
134 return 0;
135 }
136
137 return 1;
138 }
139
140 pci_decompose_tag(pc, bustag, NULL, &device, NULL);
141
142 /*
143 * On MID 5 device 1 is the internal NCR 53c810.
144 */
145 if (ccp->cc_mid == 5 && device == 1) {
146 mcpcia_irq = 16;
147 } else if (device >= 2 && device <= 5) {
148 mcpcia_irq = (device - 2) * 4 + buspin - 1;
149 } else {
150 printf("dec_kn300_intr_map: don't know how to setup %d/%d/%d\n",
151 pa->pa_bus, pa->pa_device, pa->pa_function);
152 return 1;
153 }
154
155 /*
156 * handle layout:
157 *
158 * Determine kn300 IRQ (encoded in SCB vector):
159 * bits 0..1 buspin-1
160 * bits 2..4 PCI Slot (0..7- yes, some don't exist)
161 * bits 5..7 MID-4
162 * bits 8..10 7-GID
163 *
164 * Software only:
165 * bits 11-15 MCPCIA IRQ
166 */
167 *ihp = (pci_intr_handle_t)
168 (buspin - 1 ) |
169 ((device & 0x7) << 2) |
170 ((ccp->cc_mid - 4) << 5) |
171 ((7 - ccp->cc_gid) << 8) |
172 (mcpcia_irq << 11);
173
174 return (0);
175 }
176
177 const char *
dec_kn300_intr_string(ccv,ih)178 dec_kn300_intr_string(ccv, ih)
179 void *ccv;
180 pci_intr_handle_t ih;
181 {
182 static char irqstr[64];
183 int irq;
184
185 irq = ih & 0x3ff;
186 if (irq >= NIRQ)
187 panic("dec_kn300_intr_string: bogus kn300 IRQ 0x%x", irq);
188
189 snprintf(irqstr, sizeof irqstr, "kn300 irq %d", irq);
190
191 return (irqstr);
192 }
193
194 void *
dec_kn300_intr_establish(ccv,ih,level,func,arg,name)195 dec_kn300_intr_establish(ccv, ih, level, func, arg, name)
196 void *ccv, *arg;
197 pci_intr_handle_t ih;
198 int level;
199 int (*func) (void *);
200 const char *name;
201 {
202 struct mcpcia_config *ccp = ccv;
203 void *cookie;
204 int irq;
205
206 irq = ih & 0x3ff;
207 if (irq >= NIRQ)
208 panic("dec_kn300_intr_establish: bogus kn300 IRQ 0x%x", irq);
209
210 cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL,
211 level, func, arg, "kn300 irq");
212
213 if (cookie != NULL &&
214 alpha_shared_intr_firstactive(kn300_pci_intr, irq)) {
215 scb_set(MCPCIA_VEC_PCI + SCB_IDXTOVEC(irq),
216 kn300_iointr, NULL);
217 alpha_shared_intr_set_private(kn300_pci_intr, irq, ccp);
218 savirqs[irq] = (ih >> 11) & 0x1f;
219 kn300_enable_intr(ccp, savirqs[irq]);
220 alpha_mb();
221 }
222 return (cookie);
223 }
224
225 void
dec_kn300_intr_disestablish(ccv,cookie)226 dec_kn300_intr_disestablish(ccv, cookie)
227 void *ccv, *cookie;
228 {
229 panic("dec_kn300_intr_disestablish not implemented");
230 }
231
232 void
kn300_iointr(arg,vec)233 kn300_iointr(arg, vec)
234 void *arg;
235 unsigned long vec;
236 {
237 struct mcpcia_softc *mcp;
238 u_long irq;
239
240 irq = SCB_VECTOIDX(vec - MCPCIA_VEC_PCI);
241
242 if (alpha_shared_intr_dispatch(kn300_pci_intr, irq)) {
243 /*
244 * Any claim of an interrupt at this level is a hint to
245 * reset the stray interrupt count- elsewise a slow leak
246 * over time will cause this level to be shutdown.
247 */
248 alpha_shared_intr_reset_strays(kn300_pci_intr, irq);
249 return;
250 }
251
252 /*
253 * If we haven't finished configuring yet, or there is no mcp
254 * registered for this level yet, just return.
255 */
256 mcp = alpha_shared_intr_get_private(kn300_pci_intr, irq);
257 if (mcp == NULL || mcp->mcpcia_cc == NULL)
258 return;
259
260 /*
261 * We're getting an interrupt for a device we haven't enabled.
262 * We had better not try and use -1 to find the right bit to disable.
263 */
264 if (savirqs[irq] == -1) {
265 printf("kn300_iointr: stray interrupt vector 0x%lx\n", vec);
266 return;
267 }
268
269 /*
270 * Stray interrupt; disable the IRQ on the appropriate MCPCIA
271 * if we've reached the limit.
272 */
273 alpha_shared_intr_stray(kn300_pci_intr, irq, "kn300 irq");
274 if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0)
275 return;
276 kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]);
277 }
278
279 void
kn300_enable_intr(ccp,irq)280 kn300_enable_intr(ccp, irq)
281 struct mcpcia_config *ccp;
282 int irq;
283 {
284 alpha_mb();
285 REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq);
286 alpha_mb();
287 }
288
289 void
kn300_disable_intr(ccp,irq)290 kn300_disable_intr(ccp, irq)
291 struct mcpcia_config *ccp;
292 int irq;
293 {
294 alpha_mb();
295 REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq);
296 alpha_mb();
297 }
298