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acpi_machdep.c revision 1.34 
      1 /* $NetBSD: acpi_machdep.c,v 1.34 2022/10/28 21:58:27 riastradh 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 1.34 2022/10/28 21:58:27 riastradh 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 #include <machine/pmap_private.h>
     68 
     69 #include <x86/efi.h>
     70 
     71 #include <dev/pci/pcivar.h>
     72 
     73 #include <dev/isa/isareg.h>
     74 #include <dev/isa/isavar.h>
     75 
     76 #include "ioapic.h"
     77 
     78 #include "acpica.h"
     79 #include "opt_mpbios.h"
     80 #include "opt_acpi.h"
     81 #include "opt_vga.h"
     82 
     83 #ifdef XEN
     84 #include <xen/hypervisor.h>
     85 #endif
     86 
     87 /*
     88  * Default VBIOS reset method for non-HW accelerated VGA drivers.
     89  */
     90 #ifdef VGA_POST
     91 # define VBIOS_RESET_DEFAULT	2
     92 #else
     93 # define VBIOS_RESET_DEFAULT	1
     94 #endif
     95 
     96 ACPI_STATUS
     97 acpi_md_OsInitialize(void)
     98 {
     99 	return AE_OK;
    100 }
    101 
    102 ACPI_PHYSICAL_ADDRESS
    103 acpi_md_OsGetRootPointer(void)
    104 {
    105 	ACPI_PHYSICAL_ADDRESS PhysicalAddress;
    106 	ACPI_STATUS Status;
    107 
    108 #ifdef XENPV
    109 	/*
    110 	 * Obtain the ACPI RSDP from the hypervisor.
    111 	 * This is the only way to go if Xen booted from EFI: the
    112 	 * Extended BIOS Data Area (EBDA) is not mapped, and Xen
    113 	 * does not pass an EFI SystemTable to the kernel.
    114 	 */
    115         struct xen_platform_op op = {
    116                 .cmd = XENPF_firmware_info,
    117                 .u.firmware_info = {
    118                         .type = XEN_FW_EFI_INFO,
    119                         .index = XEN_FW_EFI_CONFIG_TABLE
    120                 }
    121         };
    122         union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
    123 
    124         if (HYPERVISOR_platform_op(&op) == 0) {
    125 		struct efi_cfgtbl *ct;
    126 		int i;
    127 
    128 		ct = AcpiOsMapMemory(info->cfg.addr,
    129 		    sizeof(*ct) * info->cfg.nent);
    130 
    131 		for (i = 0; i < info->cfg.nent; i++) {
    132                 	if (memcmp(&ct[i].ct_uuid,
    133 			    &EFI_UUID_ACPI20, sizeof(EFI_UUID_ACPI20)) == 0) {
    134 				PhysicalAddress = (ACPI_PHYSICAL_ADDRESS)
    135 				    (uintptr_t)ct[i].ct_data;
    136 				if (PhysicalAddress)
    137 					goto out;
    138 
    139 			}
    140 		}
    141 
    142 		for (i = 0; i < info->cfg.nent; i++) {
    143                 	if (memcmp(&ct[i].ct_uuid,
    144 			    &EFI_UUID_ACPI10, sizeof(EFI_UUID_ACPI10)) == 0) {
    145 				PhysicalAddress = (ACPI_PHYSICAL_ADDRESS)
    146 				    (uintptr_t)ct[i].ct_data;
    147 				if (PhysicalAddress)
    148 					goto out;
    149 
    150 			}
    151 		}
    152 out:
    153 		AcpiOsUnmapMemory(ct, sizeof(*ct) * info->cfg.nent);
    154 
    155 		if (PhysicalAddress)
    156 			return PhysicalAddress;
    157 	}
    158 #else
    159 #ifdef XEN
    160 	if (vm_guest == VM_GUEST_XENPVH) {
    161 		PhysicalAddress = hvm_start_info->rsdp_paddr;
    162 		if (PhysicalAddress)
    163 			return PhysicalAddress;
    164 	}
    165 #endif
    166 	/*
    167 	 * Get the ACPI RSDP from EFI SystemTable. This works when the
    168 	 * kernel was loaded from EFI bootloader.
    169 	 */
    170 	if (efi_probe()) {
    171 		PhysicalAddress = efi_getcfgtblpa(&EFI_UUID_ACPI20);
    172 		if (!PhysicalAddress)
    173 			PhysicalAddress = efi_getcfgtblpa(&EFI_UUID_ACPI10);
    174 		if (PhysicalAddress)
    175 			return PhysicalAddress;
    176 	}
    177 
    178 #endif
    179 	/*
    180 	 * Find ACPI RSDP from Extended BIOS Data Area (EBDA). This
    181 	 * works when the kernel was started from BIOS bootloader,
    182 	 * or for Xen PV when Xen was started from BIOS bootloader.
    183 	 */
    184 	Status = AcpiFindRootPointer(&PhysicalAddress);
    185 	if (ACPI_FAILURE(Status))
    186 		PhysicalAddress = 0;
    187 
    188 	return PhysicalAddress;
    189 }
    190 
    191 struct acpi_md_override {
    192 	int irq;
    193 	int pin;
    194 	int flags;
    195 };
    196 
    197 #if NIOAPIC > 0
    198 static ACPI_STATUS
    199 acpi_md_findoverride(ACPI_SUBTABLE_HEADER *hdrp, void *aux)
    200 {
    201 	ACPI_MADT_INTERRUPT_OVERRIDE *iop;
    202 	struct acpi_md_override *ovrp;
    203 
    204 	if (hdrp->Type != ACPI_MADT_TYPE_INTERRUPT_OVERRIDE) {
    205 		return AE_OK;
    206 	}
    207 
    208 	iop = (void *)hdrp;
    209 	ovrp = aux;
    210 	if (iop->SourceIrq == ovrp->irq) {
    211 		ovrp->pin = iop->GlobalIrq;
    212 		ovrp->flags = iop->IntiFlags;
    213 	}
    214 	return AE_OK;
    215 }
    216 #endif
    217 
    218 ACPI_STATUS
    219 acpi_md_OsInstallInterruptHandler(uint32_t InterruptNumber,
    220     ACPI_OSD_HANDLER ServiceRoutine, void *Context, void **cookiep,
    221     const char *xname)
    222 {
    223 	void *ih;
    224 
    225 	ih = acpi_md_intr_establish(InterruptNumber, IPL_TTY, IST_LEVEL,
    226 	    (int (*)(void *))ServiceRoutine, Context, /*mpsafe*/true, xname);
    227 	if (ih == NULL)
    228 		return AE_NO_MEMORY;
    229 
    230 	*cookiep = ih;
    231 
    232 	return AE_OK;
    233 }
    234 
    235 void
    236 acpi_md_OsRemoveInterruptHandler(void *cookie)
    237 {
    238 	intr_disestablish(cookie);
    239 }
    240 
    241 void *
    242 acpi_md_intr_establish(uint32_t InterruptNumber, int ipl, int type,
    243     int (*handler)(void *), void *arg, bool mpsafe, const char *xname)
    244 {
    245 	void *ih;
    246 	struct pic *pic;
    247 	int irq = InterruptNumber, pin;
    248 #if NIOAPIC > 0
    249 	struct ioapic_softc *ioapic;
    250 	struct acpi_md_override ovr;
    251 	struct mp_intr_map tmpmap, *mip, **mipp = NULL;
    252 	intr_handle_t mpih;
    253 	int redir, mpflags;
    254 
    255 	/*
    256 	 * ACPI interrupts default to level-triggered active-low.
    257 	 */
    258 
    259 	mpflags = (MPS_INTTR_LEVEL << 2) | MPS_INTPO_ACTLO;
    260 	redir = IOAPIC_REDLO_LEVEL | IOAPIC_REDLO_ACTLO;
    261 
    262 	/*
    263 	 * Apply any MADT override setting.
    264 	 */
    265 
    266 	ovr.irq = irq;
    267 	ovr.pin = -1;
    268 	if (acpi_madt_map() == AE_OK) {
    269 		acpi_madt_walk(acpi_md_findoverride, &ovr);
    270 		acpi_madt_unmap();
    271 	} else {
    272 		aprint_debug("acpi_madt_map() failed, can't check for MADT override\n");
    273 	}
    274 
    275 	if (ovr.pin != -1) {
    276 		bool sci = irq == AcpiGbl_FADT.SciInterrupt;
    277 		int polarity = ovr.flags & ACPI_MADT_POLARITY_MASK;
    278 		int trigger = ovr.flags & ACPI_MADT_TRIGGER_MASK;
    279 
    280 		irq = ovr.pin;
    281 		if (polarity == ACPI_MADT_POLARITY_ACTIVE_HIGH ||
    282 		    (!sci && polarity == ACPI_MADT_POLARITY_CONFORMS)) {
    283 			mpflags &= ~MPS_INTPO_ACTLO;
    284 			mpflags |= MPS_INTPO_ACTHI;
    285 			redir &= ~IOAPIC_REDLO_ACTLO;
    286 		}
    287 		if (trigger == ACPI_MADT_TRIGGER_EDGE ||
    288 		    (!sci && trigger == ACPI_MADT_TRIGGER_CONFORMS)) {
    289 			type = IST_EDGE;
    290 			mpflags &= ~(MPS_INTTR_LEVEL << 2);
    291 			mpflags |= (MPS_INTTR_EDGE << 2);
    292 			redir &= ~IOAPIC_REDLO_LEVEL;
    293 		}
    294 	}
    295 
    296 	pic = NULL;
    297 	pin = irq;
    298 
    299 	/*
    300 	 * If the interrupt is handled via IOAPIC, update the map.
    301 	 * If the map isn't set up yet, install a temporary one.
    302 	 * Identify ISA & EISA interrupts
    303 	 */
    304 	if (mp_busses != NULL) {
    305 		if (intr_find_mpmapping(mp_isa_bus, irq, &mpih) == 0 ||
    306 		    intr_find_mpmapping(mp_eisa_bus, irq, &mpih) == 0) {
    307 			if (!APIC_IRQ_ISLEGACY(mpih)) {
    308 				pin = APIC_IRQ_PIN(mpih);
    309 				ioapic = ioapic_find(APIC_IRQ_APIC(mpih));
    310 				if (ioapic != NULL)
    311 					pic = &ioapic->sc_pic;
    312 			}
    313 		}
    314 	}
    315 
    316 	if (pic == NULL) {
    317 		/*
    318 		 * If the interrupt is handled via IOAPIC, update the map.
    319 		 * If the map isn't set up yet, install a temporary one.
    320 		 */
    321 		ioapic = ioapic_find_bybase(irq);
    322 		if (ioapic != NULL) {
    323 			pic = &ioapic->sc_pic;
    324 
    325 			if (pic->pic_type == PIC_IOAPIC) {
    326 				pin = irq - pic->pic_vecbase;
    327 				irq = -1;
    328 			} else {
    329 				pin = irq;
    330 			}
    331 
    332 			mip = ioapic->sc_pins[pin].ip_map;
    333 			if (mip) {
    334 				mip->flags &= ~0xf;
    335 				mip->flags |= mpflags;
    336 				mip->redir &= ~(IOAPIC_REDLO_LEVEL |
    337 						IOAPIC_REDLO_ACTLO);
    338 				mip->redir |= redir;
    339 			} else {
    340 				mipp = &ioapic->sc_pins[pin].ip_map;
    341 				*mipp = &tmpmap;
    342 				tmpmap.redir = redir;
    343 				tmpmap.flags = mpflags;
    344 			}
    345 		}
    346 	}
    347 
    348 	if (pic == NULL)
    349 #endif
    350 	{
    351 		pic = &i8259_pic;
    352 		pin = irq;
    353 	}
    354 
    355 	ih = intr_establish_xname(irq, pic, pin, type, ipl,
    356 	    handler, arg, mpsafe, xname);
    357 
    358 #if NIOAPIC > 0
    359 	if (mipp) {
    360 		*mipp = NULL;
    361 	}
    362 #endif
    363 
    364 	return ih;
    365 }
    366 
    367 void
    368 acpi_md_intr_mask(void *ih)
    369 {
    370 	intr_mask(ih);
    371 }
    372 
    373 void
    374 acpi_md_intr_unmask(void *ih)
    375 {
    376 	intr_unmask(ih);
    377 }
    378 
    379 void
    380 acpi_md_intr_disestablish(void *ih)
    381 {
    382 	intr_disestablish(ih);
    383 }
    384 
    385 ACPI_STATUS
    386 acpi_md_OsMapMemory(ACPI_PHYSICAL_ADDRESS PhysicalAddress,
    387     uint32_t Length, void **LogicalAddress)
    388 {
    389 	int rv;
    390 
    391 	rv = _x86_memio_map(x86_bus_space_mem, PhysicalAddress,
    392 	    Length, 0, (bus_space_handle_t *)LogicalAddress);
    393 
    394 	return (rv != 0) ? AE_NO_MEMORY : AE_OK;
    395 }
    396 
    397 void
    398 acpi_md_OsUnmapMemory(void *LogicalAddress, uint32_t Length)
    399 {
    400 	(void) _x86_memio_unmap(x86_bus_space_mem,
    401 	    (bus_space_handle_t)LogicalAddress, Length, NULL);
    402 }
    403 
    404 ACPI_STATUS
    405 acpi_md_OsGetPhysicalAddress(void *LogicalAddress,
    406     ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
    407 {
    408 	paddr_t pa;
    409 
    410 	if (pmap_extract(pmap_kernel(), (vaddr_t) LogicalAddress, &pa)) {
    411 		*PhysicalAddress = pa;
    412 		return AE_OK;
    413 	}
    414 
    415 	return AE_ERROR;
    416 }
    417 
    418 BOOLEAN
    419 acpi_md_OsReadable(void *Pointer, uint32_t Length)
    420 {
    421 	BOOLEAN rv = TRUE;
    422 	vaddr_t sva, eva;
    423 	pt_entry_t *pte;
    424 
    425 	sva = trunc_page((vaddr_t) Pointer);
    426 	eva = round_page((vaddr_t) Pointer + Length);
    427 
    428 	if (sva < VM_MIN_KERNEL_ADDRESS)
    429 		return FALSE;
    430 
    431 	for (; sva < eva; sva += PAGE_SIZE) {
    432 		pte = kvtopte(sva);
    433 		if ((*pte & PTE_P) == 0) {
    434 			rv = FALSE;
    435 			break;
    436 		}
    437 	}
    438 
    439 	return rv;
    440 }
    441 
    442 BOOLEAN
    443 acpi_md_OsWritable(void *Pointer, uint32_t Length)
    444 {
    445 	BOOLEAN rv = TRUE;
    446 	vaddr_t sva, eva;
    447 	pt_entry_t *pte;
    448 
    449 	sva = trunc_page((vaddr_t) Pointer);
    450 	eva = round_page((vaddr_t) Pointer + Length);
    451 
    452 	if (sva < VM_MIN_KERNEL_ADDRESS)
    453 		return FALSE;
    454 
    455 	for (; sva < eva; sva += PAGE_SIZE) {
    456 		pte = kvtopte(sva);
    457 		if ((*pte & (PTE_P|PTE_W)) != (PTE_P|PTE_W)) {
    458 			rv = FALSE;
    459 			break;
    460 		}
    461 	}
    462 
    463 	return rv;
    464 }
    465 
    466 void
    467 acpi_md_OsDisableInterrupt(void)
    468 {
    469 	x86_disable_intr();
    470 }
    471 
    472 void
    473 acpi_md_OsEnableInterrupt(void)
    474 {
    475 	x86_enable_intr();
    476 }
    477 
    478 uint32_t
    479 acpi_md_ncpus(void)
    480 {
    481 	return kcpuset_countset(kcpuset_attached);
    482 }
    483 
    484 static bool
    485 acpi_md_mcfg_validate(uint64_t addr, int bus_start, int *bus_end)
    486 {
    487 	struct btinfo_memmap *bim;
    488 	uint64_t size, mapaddr, mapsize;
    489 	uint32_t type;
    490 	int i, n;
    491 
    492 #ifndef XENPV
    493 	if (lookup_bootinfo(BTINFO_EFIMEMMAP) != NULL)
    494 		bim = efi_get_e820memmap();
    495 	else
    496 #endif
    497 		bim = lookup_bootinfo(BTINFO_MEMMAP);
    498 	if (bim == NULL)
    499 		return false;
    500 
    501 	size = *bus_end - bus_start + 1;
    502 	size *= ACPIMCFG_SIZE_PER_BUS;
    503 	for (i = 0; i < bim->num; i++) {
    504 		mapaddr = bim->entry[i].addr;
    505 		mapsize = bim->entry[i].size;
    506 		type = bim->entry[i].type;
    507 
    508 		aprint_debug("MCFG: MEMMAP: 0x%016" PRIx64
    509 		    "-0x%016" PRIx64 ", size=0x%016" PRIx64
    510 		    ", type=%d(%s)\n",
    511 		    mapaddr, mapaddr + mapsize - 1, mapsize, type,
    512 		    (type == BIM_Memory) ?  "Memory" :
    513 		    (type == BIM_Reserved) ?  "Reserved" :
    514 		    (type == BIM_ACPI) ? "ACPI" :
    515 		    (type == BIM_NVS) ? "NVS" :
    516 		    (type == BIM_PMEM) ? "Persistent" :
    517 		    (type == BIM_PRAM) ? "Persistent (Legacy)" :
    518 		    "unknown");
    519 
    520 		switch (type) {
    521 		case BIM_ACPI:
    522 		case BIM_Reserved:
    523 			if (addr < mapaddr || addr >= mapaddr + mapsize)
    524 				break;
    525 
    526 			/* full map */
    527 			if (addr + size <= mapaddr + mapsize)
    528 				return true;
    529 
    530 			/* partial map */
    531 			n = (mapsize - (addr - mapaddr)) /
    532 			    ACPIMCFG_SIZE_PER_BUS;
    533 			/* bus_start == bus_end is not allowed. */
    534 			if (n > 1) {
    535 				*bus_end = bus_start + n - 1;
    536 				return true;
    537 			}
    538 			aprint_debug("MCFG: bus %d-%d, address 0x%016" PRIx64
    539 			    ": invalid size: request 0x%016" PRIx64 ", "
    540 			    "actual 0x%016" PRIx64 "\n",
    541 			    bus_start, *bus_end, addr, size, mapsize);
    542 			break;
    543 		}
    544 	}
    545 	aprint_debug("MCFG: bus %d-%d, address 0x%016" PRIx64 ": "
    546 	    "no valid region\n", bus_start, *bus_end, addr);
    547 	return false;
    548 }
    549 
    550 static uint32_t
    551 acpi_md_mcfg_read(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr)
    552 {
    553 	vaddr_t va = bsh + addr;
    554 	uint32_t data = (uint32_t) -1;
    555 
    556 	KASSERT(bst == x86_bus_space_mem);
    557 
    558 	__asm("movl %1, %0" : "=a" (data) : "m" (*(volatile uint32_t *)va));
    559 
    560 	return data;
    561 }
    562 
    563 static void
    564 acpi_md_mcfg_write(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr,
    565     uint32_t data)
    566 {
    567 	vaddr_t va = bsh + addr;
    568 
    569 	KASSERT(bst == x86_bus_space_mem);
    570 
    571 	__asm("movl %1, %0" : "=m" (*(volatile uint32_t *)va) : "a" (data));
    572 }
    573 
    574 static const struct acpimcfg_ops acpi_md_mcfg_ops = {
    575 	.ao_validate = acpi_md_mcfg_validate,
    576 
    577 	.ao_read = acpi_md_mcfg_read,
    578 	.ao_write = acpi_md_mcfg_write,
    579 };
    580 
    581 void
    582 acpi_md_callback(struct acpi_softc *sc)
    583 {
    584 #ifdef MPBIOS
    585 	if (!mpbios_scanned)
    586 #endif
    587 	mpacpi_find_interrupts(sc);
    588 
    589 #ifndef XENPV
    590 	acpi_md_sleep_init();
    591 #endif
    592 
    593 	acpimcfg_init(x86_bus_space_mem, &acpi_md_mcfg_ops);
    594 }
    595 
    596 #ifndef XENPV
    597 void
    598 device_acpi_register(device_t dev, void *aux)
    599 {
    600 	device_t parent;
    601 	bool device_is_vga, device_is_pci, device_is_isa;
    602 
    603 	parent = device_parent(dev);
    604 	if (parent == NULL)
    605 		return;
    606 
    607 	device_is_vga = device_is_a(dev, "vga") || device_is_a(dev, "genfb");
    608 	device_is_pci = device_is_a(parent, "pci");
    609 	device_is_isa = device_is_a(parent, "isa");
    610 
    611 	if (device_is_vga && (device_is_pci || device_is_isa)) {
    612 		extern int acpi_md_vbios_reset;
    613 
    614 		acpi_md_vbios_reset = VBIOS_RESET_DEFAULT;
    615 	}
    616 }
    617 #endif
    618