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Use M_NOWAIT when allocating memory for the ACPI wakeup handler.
[FreeBSD/FreeBSD.git] / sys / x86 / acpica / acpi_wakeup.c
1 /*-
2  * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
3  * Copyright (c) 2001-2012 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4  * Copyright (c) 2003 Peter Wemm
5  * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #if defined(__amd64__)
34 #define DEV_APIC
35 #else
36 #include "opt_apic.h"
37 #endif
38 #ifdef __i386__
39 #include "opt_npx.h"
40 #endif
41
42 #include <sys/param.h>
43 #include <sys/bus.h>
44 #include <sys/eventhandler.h>
45 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/memrange.h>
48 #include <sys/smp.h>
49 #include <sys/systm.h>
50
51 #include <vm/vm.h>
52 #include <vm/pmap.h>
53
54 #include <machine/clock.h>
55 #include <machine/cpu.h>
56 #include <machine/intr_machdep.h>
57 #include <x86/mca.h>
58 #include <machine/pcb.h>
59 #include <machine/specialreg.h>
60 #include <machine/md_var.h>
61
62 #ifdef DEV_APIC
63 #include <x86/apicreg.h>
64 #include <x86/apicvar.h>
65 #endif
66 #ifdef SMP
67 #include <machine/smp.h>
68 #include <machine/vmparam.h>
69 #endif
70
71 #include <contrib/dev/acpica/include/acpi.h>
72
73 #include <dev/acpica/acpivar.h>
74
75 #include "acpi_wakecode.h"
76 #include "acpi_wakedata.h"
77
78 /* Make sure the code is less than a page and leave room for the stack. */
79 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
80
81 extern int              acpi_resume_beep;
82 extern int              acpi_reset_video;
83
84 #ifdef SMP
85 extern struct susppcb   **susppcbs;
86 static cpuset_t         suspcpus;
87 #else
88 static struct susppcb   **susppcbs;
89 #endif
90
91 static void             *acpi_alloc_wakeup_handler(void);
92 static void             acpi_stop_beep(void *);
93
94 #ifdef SMP
95 static int              acpi_wakeup_ap(struct acpi_softc *, int);
96 static void             acpi_wakeup_cpus(struct acpi_softc *);
97 #endif
98
99 #ifdef __amd64__
100 #define ACPI_PAGETABLES 3
101 #else
102 #define ACPI_PAGETABLES 0
103 #endif
104
105 #define WAKECODE_VADDR(sc)                              \
106     ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE))
107 #define WAKECODE_PADDR(sc)                              \
108     ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE))
109 #define WAKECODE_FIXUP(offset, type, val)       do {    \
110         type    *addr;                                  \
111         addr = (type *)(WAKECODE_VADDR(sc) + offset);   \
112         *addr = val;                                    \
113 } while (0)
114
115 static void
116 acpi_stop_beep(void *arg)
117 {
118
119         if (acpi_resume_beep != 0)
120                 timer_spkr_release();
121 }
122
123 #ifdef SMP
124 static int
125 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
126 {
127         struct pcb *pcb;
128         int             vector = (WAKECODE_PADDR(sc) >> 12) & 0xff;
129         int             apic_id = cpu_apic_ids[cpu];
130         int             ms;
131
132         pcb = &susppcbs[cpu]->sp_pcb;
133         WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
134         WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
135         WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
136
137         ipi_startup(apic_id, vector);
138
139         /* Wait up to 5 seconds for it to resume. */
140         for (ms = 0; ms < 5000; ms++) {
141                 if (!CPU_ISSET(cpu, &suspended_cpus))
142                         return (1);     /* return SUCCESS */
143                 DELAY(1000);
144         }
145         return (0);             /* return FAILURE */
146 }
147
148 #define WARMBOOT_TARGET         0
149 #define WARMBOOT_OFF            (KERNBASE + 0x0467)
150 #define WARMBOOT_SEG            (KERNBASE + 0x0469)
151
152 #define CMOS_REG                (0x70)
153 #define CMOS_DATA               (0x71)
154 #define BIOS_RESET              (0x0f)
155 #define BIOS_WARM               (0x0a)
156
157 static void
158 acpi_wakeup_cpus(struct acpi_softc *sc)
159 {
160         uint32_t        mpbioswarmvec;
161         int             cpu;
162         u_char          mpbiosreason;
163
164         /* save the current value of the warm-start vector */
165         mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
166         outb(CMOS_REG, BIOS_RESET);
167         mpbiosreason = inb(CMOS_DATA);
168
169         /* setup a vector to our boot code */
170         *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
171         *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4;
172         outb(CMOS_REG, BIOS_RESET);
173         outb(CMOS_DATA, BIOS_WARM);     /* 'warm-start' */
174
175         /* Wake up each AP. */
176         for (cpu = 1; cpu < mp_ncpus; cpu++) {
177                 if (!CPU_ISSET(cpu, &suspcpus))
178                         continue;
179                 if (acpi_wakeup_ap(sc, cpu) == 0) {
180                         /* restore the warmstart vector */
181                         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
182                         panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
183                             cpu, cpu_apic_ids[cpu]);
184                 }
185         }
186
187         /* restore the warmstart vector */
188         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
189
190         outb(CMOS_REG, BIOS_RESET);
191         outb(CMOS_DATA, mpbiosreason);
192 }
193 #endif
194
195 int
196 acpi_sleep_machdep(struct acpi_softc *sc, int state)
197 {
198         ACPI_STATUS     status;
199         struct pcb      *pcb;
200
201         if (sc->acpi_wakeaddr == 0ul)
202                 return (-1);    /* couldn't alloc wake memory */
203
204 #ifdef SMP
205         suspcpus = all_cpus;
206         CPU_CLR(PCPU_GET(cpuid), &suspcpus);
207 #endif
208
209         if (acpi_resume_beep != 0)
210                 timer_spkr_acquire();
211
212         AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc), 0);
213
214         intr_suspend();
215
216         pcb = &susppcbs[0]->sp_pcb;
217         if (savectx(pcb)) {
218 #ifdef __amd64__
219                 fpususpend(susppcbs[0]->sp_fpususpend);
220 #elif defined(DEV_NPX)
221                 npxsuspend(susppcbs[0]->sp_fpususpend);
222 #endif
223 #ifdef SMP
224                 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
225                         device_printf(sc->acpi_dev, "Failed to suspend APs\n");
226                         return (0);     /* couldn't sleep */
227                 }
228 #endif
229
230                 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
231                 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
232
233 #ifndef __amd64__
234                 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4);
235 #endif
236                 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
237                 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
238                 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
239
240                 /* Call ACPICA to enter the desired sleep state */
241                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
242                         status = AcpiEnterSleepStateS4bios();
243                 else
244                         status = AcpiEnterSleepState(state);
245                 if (ACPI_FAILURE(status)) {
246                         device_printf(sc->acpi_dev,
247                             "AcpiEnterSleepState failed - %s\n",
248                             AcpiFormatException(status));
249                         return (0);     /* couldn't sleep */
250                 }
251
252                 for (;;)
253                         ia32_pause();
254         } else {
255 #ifdef __amd64__
256                 fpuresume(susppcbs[0]->sp_fpususpend);
257 #elif defined(DEV_NPX)
258                 npxresume(susppcbs[0]->sp_fpususpend);
259 #endif
260         }
261
262         return (1);     /* wakeup successfully */
263 }
264
265 int
266 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result,
267     int intr_enabled)
268 {
269
270         if (sleep_result == -1)
271                 return (sleep_result);
272
273         if (!intr_enabled) {
274                 /* Wakeup MD procedures in interrupt disabled context */
275                 if (sleep_result == 1) {
276                         pmap_init_pat();
277                         initializecpu();
278                         PCPU_SET(switchtime, 0);
279                         PCPU_SET(switchticks, ticks);
280 #ifdef DEV_APIC
281                         lapic_xapic_mode();
282 #endif
283 #ifdef SMP
284                         if (!CPU_EMPTY(&suspcpus))
285                                 acpi_wakeup_cpus(sc);
286 #endif
287                 }
288
289 #ifdef SMP
290                 if (!CPU_EMPTY(&suspcpus))
291                         restart_cpus(suspcpus);
292 #endif
293                 mca_resume();
294 #ifdef __amd64__
295                 if (vmm_resume_p != NULL)
296                         vmm_resume_p();
297 #endif
298                 intr_resume(/*suspend_cancelled*/false);
299
300                 AcpiSetFirmwareWakingVector(0, 0);
301         } else {
302                 /* Wakeup MD procedures in interrupt enabled context */
303                 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
304                     mem_range_softc.mr_op->reinit != NULL)
305                         mem_range_softc.mr_op->reinit(&mem_range_softc);
306         }
307
308         return (sleep_result);
309 }
310
311 static void *
312 acpi_alloc_wakeup_handler(void)
313 {
314         void            *wakeaddr;
315         int             i;
316
317         /*
318          * Specify the region for our wakeup code.  We want it in the low 1 MB
319          * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
320          * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
321          * and ROM area (0xa0000 and above).  The temporary page tables must be
322          * page-aligned.
323          */
324         wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF,
325             M_NOWAIT, 0x500, 0xa0000, PAGE_SIZE, 0ul);
326         if (wakeaddr == NULL) {
327                 printf("%s: can't alloc wake memory\n", __func__);
328                 return (NULL);
329         }
330         if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
331             EVENTHANDLER_PRI_LAST) == NULL) {
332                 printf("%s: can't register event handler\n", __func__);
333                 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE,
334                     M_DEVBUF);
335                 return (NULL);
336         }
337         susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
338         for (i = 0; i < mp_ncpus; i++) {
339                 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
340                 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK);
341         }
342
343         return (wakeaddr);
344 }
345
346 void
347 acpi_install_wakeup_handler(struct acpi_softc *sc)
348 {
349         static void     *wakeaddr = NULL;
350 #ifdef __amd64__
351         uint64_t        *pt4, *pt3, *pt2;
352         int             i;
353 #endif
354
355         if (wakeaddr != NULL)
356                 return;
357
358         wakeaddr = acpi_alloc_wakeup_handler();
359         if (wakeaddr == NULL)
360                 return;
361
362         sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
363         sc->acpi_wakephys = vtophys(wakeaddr);
364
365         bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode));
366
367         /* Patch GDT base address, ljmp targets. */
368         WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
369             WAKECODE_PADDR(sc) + bootgdt);
370         WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
371             WAKECODE_PADDR(sc) + wakeup_32);
372 #ifdef __amd64__
373         WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
374             WAKECODE_PADDR(sc) + wakeup_64);
375         WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys);
376 #endif
377
378         /* Save pointers to some global data. */
379         WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
380 #ifndef __amd64__
381 #if defined(PAE) || defined(PAE_TABLES)
382         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
383 #else
384         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
385 #endif
386
387 #else
388         /* Build temporary page tables below realmode code. */
389         pt4 = wakeaddr;
390         pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t);
391         pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t);
392
393         /* Create the initial 1GB replicated page tables */
394         for (i = 0; i < 512; i++) {
395                 /*
396                  * Each slot of the level 4 pages points
397                  * to the same level 3 page
398                  */
399                 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE);
400                 pt4[i] |= PG_V | PG_RW | PG_U;
401
402                 /*
403                  * Each slot of the level 3 pages points
404                  * to the same level 2 page
405                  */
406                 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE));
407                 pt3[i] |= PG_V | PG_RW | PG_U;
408
409                 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
410                 pt2[i] = i * (2 * 1024 * 1024);
411                 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
412         }
413 #endif
414
415         if (bootverbose)
416                 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n",
417                     (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
418 }