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acpi_machdep.c revision 1.36 
      1 /* $NetBSD: acpi_machdep.c,v 1.36 2023/10/16 17:27:02 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 1.36 2023/10/16 17:27:02 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 #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 #include <arch/x86/include/genfb_machdep.h>
     76 
     77 #include "ioapic.h"
     78 
     79 #include "acpica.h"
     80 #include "opt_mpbios.h"
     81 #include "opt_acpi.h"
     82 #include "opt_vga.h"
     83 
     84 #ifdef XEN
     85 #include <xen/hypervisor.h>
     86 #endif
     87 
     88 /*
     89  * Default VBIOS reset method for non-HW accelerated VGA drivers.
     90  */
     91 #ifdef VGA_POST
     92 # define VBIOS_RESET_DEFAULT	2
     93 #else
     94 # define VBIOS_RESET_DEFAULT	1
     95 #endif
     96 
     97 ACPI_STATUS
     98 acpi_md_OsInitialize(void)
     99 {
    100 	return AE_OK;
    101 }
    102 
    103 ACPI_PHYSICAL_ADDRESS
    104 acpi_md_OsGetRootPointer(void)
    105 {
    106 	ACPI_PHYSICAL_ADDRESS PhysicalAddress;
    107 	ACPI_STATUS Status;
    108 
    109 #ifdef XENPV
    110 	/*
    111 	 * Obtain the ACPI RSDP from the hypervisor.
    112 	 * This is the only way to go if Xen booted from EFI: the
    113 	 * Extended BIOS Data Area (EBDA) is not mapped, and Xen
    114 	 * does not pass an EFI SystemTable to the kernel.
    115 	 */
    116         struct xen_platform_op op = {
    117                 .cmd = XENPF_firmware_info,
    118                 .u.firmware_info = {
    119                         .type = XEN_FW_EFI_INFO,
    120                         .index = XEN_FW_EFI_CONFIG_TABLE
    121                 }
    122         };
    123         union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
    124 
    125         if (HYPERVISOR_platform_op(&op) == 0) {
    126 		struct efi_cfgtbl *ct;
    127 		int i;
    128 
    129 		ct = AcpiOsMapMemory(info->cfg.addr,
    130 		    sizeof(*ct) * info->cfg.nent);
    131 
    132 		for (i = 0; i < info->cfg.nent; i++) {
    133                 	if (memcmp(&ct[i].ct_uuid,
    134 			    &EFI_UUID_ACPI20, sizeof(EFI_UUID_ACPI20)) == 0) {
    135 				PhysicalAddress = (ACPI_PHYSICAL_ADDRESS)
    136 				    (uintptr_t)ct[i].ct_data;
    137 				if (PhysicalAddress)
    138 					goto out;
    139 
    140 			}
    141 		}
    142 
    143 		for (i = 0; i < info->cfg.nent; i++) {
    144                 	if (memcmp(&ct[i].ct_uuid,
    145 			    &EFI_UUID_ACPI10, sizeof(EFI_UUID_ACPI10)) == 0) {
    146 				PhysicalAddress = (ACPI_PHYSICAL_ADDRESS)
    147 				    (uintptr_t)ct[i].ct_data;
    148 				if (PhysicalAddress)
    149 					goto out;
    150 
    151 			}
    152 		}
    153 out:
    154 		AcpiOsUnmapMemory(ct, sizeof(*ct) * info->cfg.nent);
    155 
    156 		if (PhysicalAddress)
    157 			return PhysicalAddress;
    158 	}
    159 #else
    160 #ifdef XEN
    161 	if (vm_guest == VM_GUEST_XENPVH) {
    162 		PhysicalAddress = hvm_start_info->rsdp_paddr;
    163 		if (PhysicalAddress)
    164 			return PhysicalAddress;
    165 	}
    166 #endif
    167 	/*
    168 	 * Get the ACPI RSDP from EFI SystemTable. This works when the
    169 	 * kernel was loaded from EFI bootloader.
    170 	 */
    171 	if (efi_probe()) {
    172 		PhysicalAddress = efi_getcfgtblpa(&EFI_UUID_ACPI20);
    173 		if (!PhysicalAddress)
    174 			PhysicalAddress = efi_getcfgtblpa(&EFI_UUID_ACPI10);
    175 		if (PhysicalAddress)
    176 			return PhysicalAddress;
    177 	}
    178 
    179 #endif
    180 	/*
    181 	 * Find ACPI RSDP from Extended BIOS Data Area (EBDA). This
    182 	 * works when the kernel was started from BIOS bootloader,
    183 	 * or for Xen PV when Xen was started from BIOS bootloader.
    184 	 */
    185 	Status = AcpiFindRootPointer(&PhysicalAddress);
    186 	if (ACPI_FAILURE(Status))
    187 		PhysicalAddress = 0;
    188 
    189 	return PhysicalAddress;
    190 }
    191 
    192 struct acpi_md_override {
    193 	int irq;
    194 	int pin;
    195 	int flags;
    196 };
    197 
    198 #if NIOAPIC > 0
    199 static ACPI_STATUS
    200 acpi_md_findoverride(ACPI_SUBTABLE_HEADER *hdrp, void *aux)
    201 {
    202 	ACPI_MADT_INTERRUPT_OVERRIDE *iop;
    203 	struct acpi_md_override *ovrp;
    204 
    205 	if (hdrp->Type != ACPI_MADT_TYPE_INTERRUPT_OVERRIDE) {
    206 		return AE_OK;
    207 	}
    208 
    209 	iop = (void *)hdrp;
    210 	ovrp = aux;
    211 	if (iop->SourceIrq == ovrp->irq) {
    212 		ovrp->pin = iop->GlobalIrq;
    213 		ovrp->flags = iop->IntiFlags;
    214 	}
    215 	return AE_OK;
    216 }
    217 #endif
    218 
    219 ACPI_STATUS
    220 acpi_md_OsInstallInterruptHandler(uint32_t InterruptNumber,
    221     ACPI_OSD_HANDLER ServiceRoutine, void *Context, void **cookiep,
    222     const char *xname)
    223 {
    224 	void *ih;
    225 
    226 	ih = acpi_md_intr_establish(InterruptNumber, IPL_TTY, IST_LEVEL,
    227 	    (int (*)(void *))ServiceRoutine, Context, /*mpsafe*/true, xname);
    228 	if (ih == NULL)
    229 		return AE_NO_MEMORY;
    230 
    231 	*cookiep = ih;
    232 
    233 	return AE_OK;
    234 }
    235 
    236 void
    237 acpi_md_OsRemoveInterruptHandler(void *cookie)
    238 {
    239 	intr_disestablish(cookie);
    240 }
    241 
    242 void *
    243 acpi_md_intr_establish(uint32_t InterruptNumber, int ipl, int type,
    244     int (*handler)(void *), void *arg, bool mpsafe, const char *xname)
    245 {
    246 	void *ih;
    247 	struct pic *pic;
    248 	int irq = InterruptNumber, pin;
    249 #if NIOAPIC > 0
    250 	struct ioapic_softc *ioapic;
    251 	struct acpi_md_override ovr;
    252 	struct mp_intr_map tmpmap, *mip, **mipp = NULL;
    253 	intr_handle_t mpih;
    254 	int redir, mpflags;
    255 
    256 	/*
    257 	 * ACPI interrupts default to level-triggered active-low.
    258 	 */
    259 
    260 	mpflags = (MPS_INTTR_LEVEL << 2) | MPS_INTPO_ACTLO;
    261 	redir = IOAPIC_REDLO_LEVEL | IOAPIC_REDLO_ACTLO;
    262 
    263 	/*
    264 	 * Apply any MADT override setting.
    265 	 */
    266 
    267 	ovr.irq = irq;
    268 	ovr.pin = -1;
    269 	if (acpi_madt_map() == AE_OK) {
    270 		acpi_madt_walk(acpi_md_findoverride, &ovr);
    271 		acpi_madt_unmap();
    272 	} else {
    273 		aprint_debug("acpi_madt_map() failed, can't check for MADT override\n");
    274 	}
    275 
    276 	if (ovr.pin != -1) {
    277 		bool sci = irq == AcpiGbl_FADT.SciInterrupt;
    278 		int polarity = ovr.flags & ACPI_MADT_POLARITY_MASK;
    279 		int trigger = ovr.flags & ACPI_MADT_TRIGGER_MASK;
    280 
    281 		irq = ovr.pin;
    282 		if (polarity == ACPI_MADT_POLARITY_ACTIVE_HIGH ||
    283 		    (!sci && polarity == ACPI_MADT_POLARITY_CONFORMS)) {
    284 			mpflags &= ~MPS_INTPO_ACTLO;
    285 			mpflags |= MPS_INTPO_ACTHI;
    286 			redir &= ~IOAPIC_REDLO_ACTLO;
    287 		}
    288 		if (trigger == ACPI_MADT_TRIGGER_EDGE ||
    289 		    (!sci && trigger == ACPI_MADT_TRIGGER_CONFORMS)) {
    290 			type = IST_EDGE;
    291 			mpflags &= ~(MPS_INTTR_LEVEL << 2);
    292 			mpflags |= (MPS_INTTR_EDGE << 2);
    293 			redir &= ~IOAPIC_REDLO_LEVEL;
    294 		}
    295 	}
    296 
    297 	pic = NULL;
    298 	pin = irq;
    299 
    300 	/*
    301 	 * If the interrupt is handled via IOAPIC, update the map.
    302 	 * If the map isn't set up yet, install a temporary one.
    303 	 * Identify ISA & EISA interrupts
    304 	 */
    305 	if (mp_busses != NULL) {
    306 		if (intr_find_mpmapping(mp_isa_bus, irq, &mpih) == 0 ||
    307 		    intr_find_mpmapping(mp_eisa_bus, irq, &mpih) == 0) {
    308 			if (!APIC_IRQ_ISLEGACY(mpih)) {
    309 				pin = APIC_IRQ_PIN(mpih);
    310 				ioapic = ioapic_find(APIC_IRQ_APIC(mpih));
    311 				if (ioapic != NULL)
    312 					pic = &ioapic->sc_pic;
    313 			}
    314 		}
    315 	}
    316 
    317 	if (pic == NULL) {
    318 		/*
    319 		 * If the interrupt is handled via IOAPIC, update the map.
    320 		 * If the map isn't set up yet, install a temporary one.
    321 		 */
    322 		ioapic = ioapic_find_bybase(irq);
    323 		if (ioapic != NULL) {
    324 			pic = &ioapic->sc_pic;
    325 
    326 			if (pic->pic_type == PIC_IOAPIC) {
    327 				pin = irq - pic->pic_vecbase;
    328 				irq = -1;
    329 			} else {
    330 				pin = irq;
    331 			}
    332 
    333 			mip = ioapic->sc_pins[pin].ip_map;
    334 			if (mip) {
    335 				mip->flags &= ~0xf;
    336 				mip->flags |= mpflags;
    337 				mip->redir &= ~(IOAPIC_REDLO_LEVEL |
    338 						IOAPIC_REDLO_ACTLO);
    339 				mip->redir |= redir;
    340 			} else {
    341 				mipp = &ioapic->sc_pins[pin].ip_map;
    342 				*mipp = &tmpmap;
    343 				tmpmap.redir = redir;
    344 				tmpmap.flags = mpflags;
    345 			}
    346 		}
    347 	}
    348 
    349 	if (pic == NULL)
    350 #endif
    351 	{
    352 		pic = &i8259_pic;
    353 		pin = irq;
    354 	}
    355 
    356 	ih = intr_establish_xname(irq, pic, pin, type, ipl,
    357 	    handler, arg, mpsafe, xname);
    358 
    359 #if NIOAPIC > 0
    360 	if (mipp) {
    361 		*mipp = NULL;
    362 	}
    363 #endif
    364 
    365 	return ih;
    366 }
    367 
    368 void
    369 acpi_md_intr_mask(void *ih)
    370 {
    371 	intr_mask(ih);
    372 }
    373 
    374 void
    375 acpi_md_intr_unmask(void *ih)
    376 {
    377 	intr_unmask(ih);
    378 }
    379 
    380 void
    381 acpi_md_intr_disestablish(void *ih)
    382 {
    383 	intr_disestablish(ih);
    384 }
    385 
    386 ACPI_STATUS
    387 acpi_md_OsMapMemory(ACPI_PHYSICAL_ADDRESS PhysicalAddress,
    388     uint32_t Length, void **LogicalAddress)
    389 {
    390 	int rv;
    391 
    392 	rv = _x86_memio_map(x86_bus_space_mem, PhysicalAddress,
    393 	    Length, 0, (bus_space_handle_t *)LogicalAddress);
    394 
    395 	return (rv != 0) ? AE_NO_MEMORY : AE_OK;
    396 }
    397 
    398 void
    399 acpi_md_OsUnmapMemory(void *LogicalAddress, uint32_t Length)
    400 {
    401 	(void) _x86_memio_unmap(x86_bus_space_mem,
    402 	    (bus_space_handle_t)LogicalAddress, Length, NULL);
    403 }
    404 
    405 ACPI_STATUS
    406 acpi_md_OsGetPhysicalAddress(void *LogicalAddress,
    407     ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
    408 {
    409 	paddr_t pa;
    410 
    411 	if (pmap_extract(pmap_kernel(), (vaddr_t) LogicalAddress, &pa)) {
    412 		*PhysicalAddress = pa;
    413 		return AE_OK;
    414 	}
    415 
    416 	return AE_ERROR;
    417 }
    418 
    419 BOOLEAN
    420 acpi_md_OsReadable(void *Pointer, uint32_t Length)
    421 {
    422 	BOOLEAN rv = TRUE;
    423 	vaddr_t sva, eva;
    424 	pt_entry_t *pte;
    425 
    426 	sva = trunc_page((vaddr_t) Pointer);
    427 	eva = round_page((vaddr_t) Pointer + Length);
    428 
    429 	if (sva < VM_MIN_KERNEL_ADDRESS)
    430 		return FALSE;
    431 
    432 	for (; sva < eva; sva += PAGE_SIZE) {
    433 		pte = kvtopte(sva);
    434 		if ((*pte & PTE_P) == 0) {
    435 			rv = FALSE;
    436 			break;
    437 		}
    438 	}
    439 
    440 	return rv;
    441 }
    442 
    443 BOOLEAN
    444 acpi_md_OsWritable(void *Pointer, uint32_t Length)
    445 {
    446 	BOOLEAN rv = TRUE;
    447 	vaddr_t sva, eva;
    448 	pt_entry_t *pte;
    449 
    450 	sva = trunc_page((vaddr_t) Pointer);
    451 	eva = round_page((vaddr_t) Pointer + Length);
    452 
    453 	if (sva < VM_MIN_KERNEL_ADDRESS)
    454 		return FALSE;
    455 
    456 	for (; sva < eva; sva += PAGE_SIZE) {
    457 		pte = kvtopte(sva);
    458 		if ((*pte & (PTE_P|PTE_W)) != (PTE_P|PTE_W)) {
    459 			rv = FALSE;
    460 			break;
    461 		}
    462 	}
    463 
    464 	return rv;
    465 }
    466 
    467 void
    468 acpi_md_OsDisableInterrupt(void)
    469 {
    470 	x86_disable_intr();
    471 }
    472 
    473 void
    474 acpi_md_OsEnableInterrupt(void)
    475 {
    476 	x86_enable_intr();
    477 }
    478 
    479 uint32_t
    480 acpi_md_ncpus(void)
    481 {
    482 	return kcpuset_countset(kcpuset_attached);
    483 }
    484 
    485 static bool
    486 acpi_md_mcfg_validate(uint64_t addr, int bus_start, int *bus_end)
    487 {
    488 	struct btinfo_memmap *bim;
    489 	uint64_t size, mapaddr, mapsize;
    490 	uint32_t type;
    491 	int i, n;
    492 
    493 #ifndef XENPV
    494 	if (lookup_bootinfo(BTINFO_EFIMEMMAP) != NULL)
    495 		bim = efi_get_e820memmap();
    496 	else
    497 #endif
    498 		bim = lookup_bootinfo(BTINFO_MEMMAP);
    499 	if (bim == NULL)
    500 		return false;
    501 
    502 	size = *bus_end - bus_start + 1;
    503 	size *= ACPIMCFG_SIZE_PER_BUS;
    504 	for (i = 0; i < bim->num; i++) {
    505 		mapaddr = bim->entry[i].addr;
    506 		mapsize = bim->entry[i].size;
    507 		type = bim->entry[i].type;
    508 
    509 		aprint_debug("MCFG: MEMMAP: 0x%016" PRIx64
    510 		    "-0x%016" PRIx64 ", size=0x%016" PRIx64
    511 		    ", type=%d(%s)\n",
    512 		    mapaddr, mapaddr + mapsize - 1, mapsize, type,
    513 		    (type == BIM_Memory) ?  "Memory" :
    514 		    (type == BIM_Reserved) ?  "Reserved" :
    515 		    (type == BIM_ACPI) ? "ACPI" :
    516 		    (type == BIM_NVS) ? "NVS" :
    517 		    (type == BIM_PMEM) ? "Persistent" :
    518 		    (type == BIM_PRAM) ? "Persistent (Legacy)" :
    519 		    "unknown");
    520 
    521 		switch (type) {
    522 		case BIM_ACPI:
    523 		case BIM_Reserved:
    524 			if (addr < mapaddr || addr >= mapaddr + mapsize)
    525 				break;
    526 
    527 			/* full map */
    528 			if (addr + size <= mapaddr + mapsize)
    529 				return true;
    530 
    531 			/* partial map */
    532 			n = (mapsize - (addr - mapaddr)) /
    533 			    ACPIMCFG_SIZE_PER_BUS;
    534 			/* bus_start == bus_end is not allowed. */
    535 			if (n > 1) {
    536 				*bus_end = bus_start + n - 1;
    537 				return true;
    538 			}
    539 			aprint_debug("MCFG: bus %d-%d, address 0x%016" PRIx64
    540 			    ": invalid size: request 0x%016" PRIx64 ", "
    541 			    "actual 0x%016" PRIx64 "\n",
    542 			    bus_start, *bus_end, addr, size, mapsize);
    543 			break;
    544 		}
    545 	}
    546 	aprint_debug("MCFG: bus %d-%d, address 0x%016" PRIx64 ": "
    547 	    "no valid region\n", bus_start, *bus_end, addr);
    548 	return false;
    549 }
    550 
    551 static uint32_t
    552 acpi_md_mcfg_read(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr)
    553 {
    554 	vaddr_t va = bsh + addr;
    555 	uint32_t data = (uint32_t) -1;
    556 
    557 	KASSERT(bst == x86_bus_space_mem);
    558 
    559 	__asm("movl %1, %0" : "=a" (data) : "m" (*(volatile uint32_t *)va));
    560 
    561 	return data;
    562 }
    563 
    564 static void
    565 acpi_md_mcfg_write(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr,
    566     uint32_t data)
    567 {
    568 	vaddr_t va = bsh + addr;
    569 
    570 	KASSERT(bst == x86_bus_space_mem);
    571 
    572 	__asm("movl %1, %0" : "=m" (*(volatile uint32_t *)va) : "a" (data));
    573 }
    574 
    575 static const struct acpimcfg_ops acpi_md_mcfg_ops = {
    576 	.ao_validate = acpi_md_mcfg_validate,
    577 
    578 	.ao_read = acpi_md_mcfg_read,
    579 	.ao_write = acpi_md_mcfg_write,
    580 };
    581 
    582 void
    583 acpi_md_callback(struct acpi_softc *sc)
    584 {
    585 #ifdef MPBIOS
    586 	if (!mpbios_scanned)
    587 #endif
    588 	mpacpi_find_interrupts(sc);
    589 
    590 #ifndef XENPV
    591 	acpi_md_sleep_init();
    592 #endif
    593 
    594 	acpimcfg_init(x86_bus_space_mem, &acpi_md_mcfg_ops);
    595 }
    596 
    597 #ifndef XENPV
    598 int acpi_md_vbios_reset = 0;
    599 
    600 void
    601 device_acpi_register(device_t dev, void *aux)
    602 {
    603 	device_t parent;
    604 	bool device_is_vga, device_is_pci, device_is_isa;
    605 
    606 	parent = device_parent(dev);
    607 	if (parent == NULL)
    608 		return;
    609 
    610 	device_is_vga = device_is_a(dev, "vga") || device_is_a(dev, "genfb");
    611 	device_is_pci = device_is_a(parent, "pci");
    612 	device_is_isa = device_is_a(parent, "isa");
    613 
    614 	if (device_is_vga && (device_is_pci || device_is_isa)) {
    615 		acpi_md_vbios_reset = VBIOS_RESET_DEFAULT;
    616 	}
    617 }
    618 #endif
    619