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acpi_machdep.c revision 1.30 
      1 /* $NetBSD: acpi_machdep.c,v 1.30 2020/05/02 16:44:35 bouyer Exp $ */
      2 
      3 /*
      4  * Copyright 2001 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      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, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * Machine-dependent routines for ACPICA.
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __KERNEL_RCSID(0, "$NetBSD: acpi_machdep.c,v 1.30 2020/05/02 16:44:35 bouyer Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/bus.h>
     48 #include <sys/cpu.h>
     49 #include <sys/device.h>
     50 
     51 #include <uvm/uvm_extern.h>
     52 
     53 #include <machine/cpufunc.h>
     54 #include <machine/bootinfo.h>
     55 #include <machine/autoconf.h>
     56 
     57 #include <dev/acpi/acpica.h>
     58 #include <dev/acpi/acpivar.h>
     59 #include <dev/acpi/acpi_mcfg.h>
     60 
     61 #include <machine/acpi_machdep.h>
     62 #include <machine/mpbiosvar.h>
     63 #include <machine/mpacpi.h>
     64 #include <machine/i82093reg.h>
     65 #include <machine/i82093var.h>
     66 #include <machine/pic.h>
     67 
     68 #include <x86/efi.h>
     69 
     70 #include <dev/pci/pcivar.h>
     71 
     72 #include <dev/isa/isareg.h>
     73 #include <dev/isa/isavar.h>
     74 
     75 #include "ioapic.h"
     76 
     77 #include "acpica.h"
     78 #include "opt_mpbios.h"
     79 #include "opt_acpi.h"
     80 #include "opt_vga.h"
     81 
     82 #ifdef XEN
     83 #include <xen/hypervisor.h>
     84 #endif
     85 
     86 /*
     87  * Default VBIOS reset method for non-HW accelerated VGA drivers.
     88  */
     89 #ifdef VGA_POST
     90 # define VBIOS_RESET_DEFAULT	2
     91 #else
     92 # define VBIOS_RESET_DEFAULT	1
     93 #endif
     94 
     95 ACPI_STATUS
     96 acpi_md_OsInitialize(void)
     97 {
     98 	return AE_OK;
     99 }
    100 
    101 ACPI_PHYSICAL_ADDRESS
    102 acpi_md_OsGetRootPointer(void)
    103 {
    104 	ACPI_PHYSICAL_ADDRESS PhysicalAddress;
    105 	ACPI_STATUS Status;
    106 
    107 #ifdef XENPV
    108 	/*
    109 	 * Obtain the ACPI RSDP from the hypervisor.
    110 	 * This is the only way to go if Xen booted from EFI: the
    111 	 * Extended BIOS Data Area (EBDA) is not mapped, and Xen
    112 	 * does not pass an EFI SystemTable to the kernel.
    113 	 */
    114         struct xen_platform_op op = {
    115                 .cmd = XENPF_firmware_info,
    116                 .u.firmware_info = {
    117                         .type = XEN_FW_EFI_INFO,
    118                         .index = XEN_FW_EFI_CONFIG_TABLE
    119                 }
    120         };
    121         union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
    122 
    123         if (HYPERVISOR_platform_op(&op) == 0) {
    124 		struct efi_cfgtbl *ct;
    125 		int i;
    126 
    127 		ct = AcpiOsMapMemory(info->cfg.addr,
    128 		    sizeof(*ct) * info->cfg.nent);
    129 
    130 		for (i = 0; i < info->cfg.nent; i++) {
    131                 	if (memcmp(&ct[i].ct_uuid,
    132 			    &EFI_UUID_ACPI20, sizeof(EFI_UUID_ACPI20)) == 0) {
    133 				PhysicalAddress = (ACPI_PHYSICAL_ADDRESS)
    134 				    (uintptr_t)ct[i].ct_data;
    135 				if (PhysicalAddress)
    136 					goto out;
    137 
    138 			}
    139 		}
    140 
    141 		for (i = 0; i < info->cfg.nent; i++) {
    142                 	if (memcmp(&ct[i].ct_uuid,
    143 			    &EFI_UUID_ACPI10, sizeof(EFI_UUID_ACPI10)) == 0) {
    144 				PhysicalAddress = (ACPI_PHYSICAL_ADDRESS)
    145 				    (uintptr_t)ct[i].ct_data;
    146 				if (PhysicalAddress)
    147 					goto out;
    148 
    149 			}
    150 		}
    151 out:
    152 		AcpiOsUnmapMemory(ct, sizeof(*ct) * info->cfg.nent);
    153 
    154 		if (PhysicalAddress)
    155 			return PhysicalAddress;
    156 	}
    157 #else
    158 #ifdef XEN
    159 	if (vm_guest == VM_GUEST_XENPVH) {
    160 		PhysicalAddress = hvm_start_info->rsdp_paddr;
    161 		if (PhysicalAddress)
    162 			return PhysicalAddress;
    163 	}
    164 #endif
    165 	/*
    166 	 * Get the ACPI RSDP from EFI SystemTable. This works when the
    167 	 * kernel was loaded from EFI bootloader.
    168 	 */
    169 	if (efi_probe()) {
    170 		PhysicalAddress = efi_getcfgtblpa(&EFI_UUID_ACPI20);
    171 		if (!PhysicalAddress)
    172 			PhysicalAddress = efi_getcfgtblpa(&EFI_UUID_ACPI10);
    173 		if (PhysicalAddress)
    174 			return PhysicalAddress;
    175 	}
    176 
    177 #endif
    178 	/*
    179 	 * Find ACPI RSDP from Extended BIOS Data Area (EBDA). This
    180 	 * works when the kernel was started from BIOS bootloader,
    181 	 * or for Xen PV when Xen was started from BIOS bootloader.
    182 	 */
    183 	Status = AcpiFindRootPointer(&PhysicalAddress);
    184 	if (ACPI_FAILURE(Status))
    185 		PhysicalAddress = 0;
    186 
    187 	return PhysicalAddress;
    188 }
    189 
    190 struct acpi_md_override {
    191 	int irq;
    192 	int pin;
    193 	int flags;
    194 };
    195 
    196 #if NIOAPIC > 0
    197 static ACPI_STATUS
    198 acpi_md_findoverride(ACPI_SUBTABLE_HEADER *hdrp, void *aux)
    199 {
    200 	ACPI_MADT_INTERRUPT_OVERRIDE *iop;
    201 	struct acpi_md_override *ovrp;
    202 
    203 	if (hdrp->Type != ACPI_MADT_TYPE_INTERRUPT_OVERRIDE) {
    204 		return AE_OK;
    205 	}
    206 
    207 	iop = (void *)hdrp;
    208 	ovrp = aux;
    209 	if (iop->SourceIrq == ovrp->irq) {
    210 		ovrp->pin = iop->GlobalIrq;
    211 		ovrp->flags = iop->IntiFlags;
    212 	}
    213 	return AE_OK;
    214 }
    215 #endif
    216 
    217 ACPI_STATUS
    218 acpi_md_OsInstallInterruptHandler(uint32_t InterruptNumber,
    219     ACPI_OSD_HANDLER ServiceRoutine, void *Context, void **cookiep,
    220     const char *xname)
    221 {
    222 	void *ih;
    223 
    224 	ih = acpi_md_intr_establish(InterruptNumber, IPL_TTY, IST_LEVEL,
    225 	    (int (*)(void *))ServiceRoutine, Context, false, xname);
    226 	if (ih == NULL)
    227 		return AE_NO_MEMORY;
    228 
    229 	*cookiep = ih;
    230 
    231 	return AE_OK;
    232 }
    233 
    234 void
    235 acpi_md_OsRemoveInterruptHandler(void *cookie)
    236 {
    237 	intr_disestablish(cookie);
    238 }
    239 
    240 void *
    241 acpi_md_intr_establish(uint32_t InterruptNumber, int ipl, int type,
    242     int (*handler)(void *), void *arg, bool mpsafe, const char *xname)
    243 {
    244 	void *ih;
    245 	struct pic *pic;
    246 	int irq = InterruptNumber, pin;
    247 #if NIOAPIC > 0
    248 	struct ioapic_softc *ioapic;
    249 	struct acpi_md_override ovr;
    250 	struct mp_intr_map tmpmap, *mip, **mipp = NULL;
    251 	intr_handle_t mpih;
    252 	int redir, mpflags;
    253 
    254 	/*
    255 	 * ACPI interrupts default to level-triggered active-low.
    256 	 */
    257 
    258 	mpflags = (MPS_INTTR_LEVEL << 2) | MPS_INTPO_ACTLO;
    259 	redir = IOAPIC_REDLO_LEVEL | IOAPIC_REDLO_ACTLO;
    260 
    261 	/*
    262 	 * Apply any MADT override setting.
    263 	 */
    264 
    265 	ovr.irq = irq;
    266 	ovr.pin = -1;
    267 	if (acpi_madt_map() == AE_OK) {
    268 		acpi_madt_walk(acpi_md_findoverride, &ovr);
    269 		acpi_madt_unmap();
    270 	} else {
    271 		aprint_debug("acpi_madt_map() failed, can't check for MADT override\n");
    272 	}
    273 
    274 	if (ovr.pin != -1) {
    275 		bool sci = irq == AcpiGbl_FADT.SciInterrupt;
    276 		int polarity = ovr.flags & ACPI_MADT_POLARITY_MASK;
    277 		int trigger = ovr.flags & ACPI_MADT_TRIGGER_MASK;
    278 
    279 		irq = ovr.pin;
    280 		if (polarity == ACPI_MADT_POLARITY_ACTIVE_HIGH ||
    281 		    (!sci && polarity == ACPI_MADT_POLARITY_CONFORMS)) {
    282 			mpflags &= ~MPS_INTPO_ACTLO;
    283 			mpflags |= MPS_INTPO_ACTHI;
    284 			redir &= ~IOAPIC_REDLO_ACTLO;
    285 		}
    286 		if (trigger == ACPI_MADT_TRIGGER_EDGE ||
    287 		    (!sci && trigger == ACPI_MADT_TRIGGER_CONFORMS)) {
    288 			type = IST_EDGE;
    289 			mpflags &= ~(MPS_INTTR_LEVEL << 2);
    290 			mpflags |= (MPS_INTTR_EDGE << 2);
    291 			redir &= ~IOAPIC_REDLO_LEVEL;
    292 		}
    293 	}
    294 
    295 	pic = NULL;
    296 	pin = irq;
    297 
    298 	/*
    299 	 * If the interrupt is handled via IOAPIC, update the map.
    300 	 * If the map isn't set up yet, install a temporary one.
    301 	 * Identify ISA & EISA interrupts
    302 	 */
    303 	if (mp_busses != NULL) {
    304 		if (intr_find_mpmapping(mp_isa_bus, irq, &mpih) == 0 ||
    305 		    intr_find_mpmapping(mp_eisa_bus, irq, &mpih) == 0) {
    306 			if (!APIC_IRQ_ISLEGACY(mpih)) {
    307 				pin = APIC_IRQ_PIN(mpih);
    308 				ioapic = ioapic_find(APIC_IRQ_APIC(mpih));
    309 				if (ioapic != NULL)
    310 					pic = &ioapic->sc_pic;
    311 			}
    312 		}
    313 	}
    314 
    315 	if (pic == NULL) {
    316 		/*
    317 		 * If the interrupt is handled via IOAPIC, update the map.
    318 		 * If the map isn't set up yet, install a temporary one.
    319 		 */
    320 		ioapic = ioapic_find_bybase(irq);
    321 		if (ioapic != NULL) {
    322 			pic = &ioapic->sc_pic;
    323 
    324 			if (pic->pic_type == PIC_IOAPIC) {
    325 				pin = irq - pic->pic_vecbase;
    326 				irq = -1;
    327 			} else {
    328 				pin = irq;
    329 			}
    330 
    331 			mip = ioapic->sc_pins[pin].ip_map;
    332 			if (mip) {
    333 				mip->flags &= ~0xf;
    334 				mip->flags |= mpflags;
    335 				mip->redir &= ~(IOAPIC_REDLO_LEVEL |
    336 						IOAPIC_REDLO_ACTLO);
    337 				mip->redir |= redir;
    338 			} else {
    339 				mipp = &ioapic->sc_pins[pin].ip_map;
    340 				*mipp = &tmpmap;
    341 				tmpmap.redir = redir;
    342 				tmpmap.flags = mpflags;
    343 			}
    344 		}
    345 	}
    346 
    347 	if (pic == NULL)
    348 #endif
    349 	{
    350 		pic = &i8259_pic;
    351 		pin = irq;
    352 	}
    353 
    354 	ih = intr_establish_xname(irq, pic, pin, type, ipl,
    355 	    handler, arg, mpsafe, xname);
    356 
    357 #if NIOAPIC > 0
    358 	if (mipp) {
    359 		*mipp = NULL;
    360 	}
    361 #endif
    362 
    363 	return ih;
    364 }
    365 
    366 void
    367 acpi_md_intr_mask(void *ih)
    368 {
    369 	intr_mask(ih);
    370 }
    371 
    372 void
    373 acpi_md_intr_unmask(void *ih)
    374 {
    375 	intr_unmask(ih);
    376 }
    377 
    378 void
    379 acpi_md_intr_disestablish(void *ih)
    380 {
    381 	intr_disestablish(ih);
    382 }
    383 
    384 ACPI_STATUS
    385 acpi_md_OsMapMemory(ACPI_PHYSICAL_ADDRESS PhysicalAddress,
    386     uint32_t Length, void **LogicalAddress)
    387 {
    388 	int rv;
    389 
    390 	rv = _x86_memio_map(x86_bus_space_mem, PhysicalAddress,
    391 	    Length, 0, (bus_space_handle_t *)LogicalAddress);
    392 
    393 	return (rv != 0) ? AE_NO_MEMORY : AE_OK;
    394 }
    395 
    396 void
    397 acpi_md_OsUnmapMemory(void *LogicalAddress, uint32_t Length)
    398 {
    399 	(void) _x86_memio_unmap(x86_bus_space_mem,
    400 	    (bus_space_handle_t)LogicalAddress, Length, NULL);
    401 }
    402 
    403 ACPI_STATUS
    404 acpi_md_OsGetPhysicalAddress(void *LogicalAddress,
    405     ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
    406 {
    407 	paddr_t pa;
    408 
    409 	if (pmap_extract(pmap_kernel(), (vaddr_t) LogicalAddress, &pa)) {
    410 		*PhysicalAddress = pa;
    411 		return AE_OK;
    412 	}
    413 
    414 	return AE_ERROR;
    415 }
    416 
    417 BOOLEAN
    418 acpi_md_OsReadable(void *Pointer, uint32_t Length)
    419 {
    420 	BOOLEAN rv = TRUE;
    421 	vaddr_t sva, eva;
    422 	pt_entry_t *pte;
    423 
    424 	sva = trunc_page((vaddr_t) Pointer);
    425 	eva = round_page((vaddr_t) Pointer + Length);
    426 
    427 	if (sva < VM_MIN_KERNEL_ADDRESS)
    428 		return FALSE;
    429 
    430 	for (; sva < eva; sva += PAGE_SIZE) {
    431 		pte = kvtopte(sva);
    432 		if ((*pte & PTE_P) == 0) {
    433 			rv = FALSE;
    434 			break;
    435 		}
    436 	}
    437 
    438 	return rv;
    439 }
    440 
    441 BOOLEAN
    442 acpi_md_OsWritable(void *Pointer, uint32_t Length)
    443 {
    444 	BOOLEAN rv = TRUE;
    445 	vaddr_t sva, eva;
    446 	pt_entry_t *pte;
    447 
    448 	sva = trunc_page((vaddr_t) Pointer);
    449 	eva = round_page((vaddr_t) Pointer + Length);
    450 
    451 	if (sva < VM_MIN_KERNEL_ADDRESS)
    452 		return FALSE;
    453 
    454 	for (; sva < eva; sva += PAGE_SIZE) {
    455 		pte = kvtopte(sva);
    456 		if ((*pte & (PTE_P|PTE_W)) != (PTE_P|PTE_W)) {
    457 			rv = FALSE;
    458 			break;
    459 		}
    460 	}
    461 
    462 	return rv;
    463 }
    464 
    465 void
    466 acpi_md_OsDisableInterrupt(void)
    467 {
    468 	x86_disable_intr();
    469 }
    470 
    471 void
    472 acpi_md_OsEnableInterrupt(void)
    473 {
    474 	x86_enable_intr();
    475 }
    476 
    477 uint32_t
    478 acpi_md_ncpus(void)
    479 {
    480 	return kcpuset_countset(kcpuset_attached);
    481 }
    482 
    483 static bool
    484 acpi_md_mcfg_validate(uint64_t addr, int bus_start, int *bus_end)
    485 {
    486 	struct btinfo_memmap *bim;
    487 	uint64_t size, mapaddr, mapsize;
    488 	uint32_t type;
    489 	int i, n;
    490 
    491 #ifndef XENPV
    492 	if (lookup_bootinfo(BTINFO_EFIMEMMAP) != NULL)
    493 		bim = efi_get_e820memmap();
    494 	else
    495 #endif
    496 		bim = lookup_bootinfo(BTINFO_MEMMAP);
    497 	if (bim == NULL)
    498 		return false;
    499 
    500 	size = *bus_end - bus_start + 1;
    501 	size *= ACPIMCFG_SIZE_PER_BUS;
    502 	for (i = 0; i < bim->num; i++) {
    503 		mapaddr = bim->entry[i].addr;
    504 		mapsize = bim->entry[i].size;
    505 		type = bim->entry[i].type;
    506 
    507 		aprint_debug("MCFG: MEMMAP: 0x%016" PRIx64
    508 		    "-0x%016" PRIx64 ", size=0x%016" PRIx64
    509 		    ", type=%d(%s)\n",
    510 		    mapaddr, mapaddr + mapsize - 1, mapsize, type,
    511 		    (type == BIM_Memory) ?  "Memory" :
    512 		    (type == BIM_Reserved) ?  "Reserved" :
    513 		    (type == BIM_ACPI) ? "ACPI" :
    514 		    (type == BIM_NVS) ? "NVS" :
    515 		    (type == BIM_PMEM) ? "Persistent" :
    516 		    (type == BIM_PRAM) ? "Persistent (Legacy)" :
    517 		    "unknown");
    518 
    519 		switch (type) {
    520 		case BIM_ACPI:
    521 		case BIM_Reserved:
    522 			if (addr < mapaddr || addr >= mapaddr + mapsize)
    523 				break;
    524 
    525 			/* full map */
    526 			if (addr + size <= mapaddr + mapsize)
    527 				return true;
    528 
    529 			/* partial map */
    530 			n = (mapsize - (addr - mapaddr)) /
    531 			    ACPIMCFG_SIZE_PER_BUS;
    532 			/* bus_start == bus_end is not allowed. */
    533 			if (n > 1) {
    534 				*bus_end = bus_start + n - 1;
    535 				return true;
    536 			}
    537 			aprint_debug("MCFG: bus %d-%d, address 0x%016" PRIx64
    538 			    ": invalid size: request 0x%016" PRIx64 ", "
    539 			    "actual 0x%016" PRIx64 "\n",
    540 			    bus_start, *bus_end, addr, size, mapsize);
    541 			break;
    542 		}
    543 	}
    544 	aprint_debug("MCFG: bus %d-%d, address 0x%016" PRIx64 ": "
    545 	    "no valid region\n", bus_start, *bus_end, addr);
    546 	return false;
    547 }
    548 
    549 static uint32_t
    550 acpi_md_mcfg_read(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr)
    551 {
    552 	vaddr_t va = bsh + addr;
    553 	uint32_t data = (uint32_t) -1;
    554 
    555 	KASSERT(bst == x86_bus_space_mem);
    556 
    557 	__asm("movl %1, %0" : "=a" (data) : "m" (*(volatile uint32_t *)va));
    558 
    559 	return data;
    560 }
    561 
    562 static void
    563 acpi_md_mcfg_write(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr,
    564     uint32_t data)
    565 {
    566 	vaddr_t va = bsh + addr;
    567 
    568 	KASSERT(bst == x86_bus_space_mem);
    569 
    570 	__asm("movl %1, %0" : "=m" (*(volatile uint32_t *)va) : "a" (data));
    571 }
    572 
    573 static const struct acpimcfg_ops acpi_md_mcfg_ops = {
    574 	.ao_validate = acpi_md_mcfg_validate,
    575 
    576 	.ao_read = acpi_md_mcfg_read,
    577 	.ao_write = acpi_md_mcfg_write,
    578 };
    579 
    580 void
    581 acpi_md_callback(struct acpi_softc *sc)
    582 {
    583 #ifdef MPBIOS
    584 	if (!mpbios_scanned)
    585 #endif
    586 	mpacpi_find_interrupts(sc);
    587 
    588 #ifndef XENPV
    589 	acpi_md_sleep_init();
    590 #endif
    591 
    592 	acpimcfg_init(x86_bus_space_mem, &acpi_md_mcfg_ops);
    593 }
    594 
    595 #ifndef XENPV
    596 void
    597 device_acpi_register(device_t dev, void *aux)
    598 {
    599 	device_t parent;
    600 	bool device_is_vga, device_is_pci, device_is_isa;
    601 
    602 	parent = device_parent(dev);
    603 	if (parent == NULL)
    604 		return;
    605 
    606 	device_is_vga = device_is_a(dev, "vga") || device_is_a(dev, "genfb");
    607 	device_is_pci = device_is_a(parent, "pci");
    608 	device_is_isa = device_is_a(parent, "isa");
    609 
    610 	if (device_is_vga && (device_is_pci || device_is_isa)) {
    611 		extern int acpi_md_vbios_reset;
    612 
    613 		acpi_md_vbios_reset = VBIOS_RESET_DEFAULT;
    614 	}
    615 }
    616 #endif
    617