/* $OpenBSD: pci_machdep.c,v 1.55 2012/09/19 23:23:50 kettenis Exp $ */ /* $NetBSD: pci_machdep.c,v 1.3 2003/05/07 21:33:58 fvdl Exp $ */ /*- * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. * Copyright (c) 1994 Charles M. Hannum. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Charles M. Hannum. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Machine-specific functions for PCI autoconfiguration. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ioapic.h" #if NIOAPIC > 0 #include #include #endif /* * Memory Mapped Configuration space access. * * Since mapping the whole configuration space will cost us up to * 256MB of kernel virtual memory, we use seperate mappings per bus. * The mappings are created on-demand, such that we only use kernel * virtual memory for busses that are actually present. */ bus_addr_t pci_mcfg_addr; int pci_mcfg_min_bus, pci_mcfg_max_bus; bus_space_tag_t pci_mcfgt = X86_BUS_SPACE_MEM; bus_space_handle_t pci_mcfgh[256]; void pci_mcfg_map_bus(int); struct mutex pci_conf_lock = MUTEX_INITIALIZER(IPL_HIGH); #define PCI_CONF_LOCK() \ do { \ mtx_enter(&pci_conf_lock); \ } while (0) #define PCI_CONF_UNLOCK() \ do { \ mtx_leave(&pci_conf_lock); \ } while (0) #define PCI_MODE1_ENABLE 0x80000000UL #define PCI_MODE1_ADDRESS_REG 0x0cf8 #define PCI_MODE1_DATA_REG 0x0cfc /* * PCI doesn't have any special needs; just use the generic versions * of these functions. */ struct bus_dma_tag pci_bus_dma_tag = { NULL, /* _may_bounce */ _bus_dmamap_create, _bus_dmamap_destroy, _bus_dmamap_load, _bus_dmamap_load_mbuf, _bus_dmamap_load_uio, _bus_dmamap_load_raw, _bus_dmamap_unload, _bus_dmamap_sync, _bus_dmamem_alloc, _bus_dmamem_free, _bus_dmamem_map, _bus_dmamem_unmap, _bus_dmamem_mmap, }; void pci_attach_hook(struct device *parent, struct device *self, struct pcibus_attach_args *pba) { pci_chipset_tag_t pc = pba->pba_pc; pcitag_t tag; pcireg_t id, class; if (pba->pba_bus != 0) return; /* * In order to decide whether the system supports MSI we look * at the host bridge, which should be device 0 function 0 on * bus 0. It is better to not enable MSI on systems that * support it than the other way around, so be conservative * here. So we don't enable MSI if we don't find a host * bridge there. We also deliberately don't enable MSI on * chipsets from low-end manifacturers like VIA and SiS. */ tag = pci_make_tag(pc, 0, 0, 0); id = pci_conf_read(pc, tag, PCI_ID_REG); class = pci_conf_read(pc, tag, PCI_CLASS_REG); if (PCI_CLASS(class) != PCI_CLASS_BRIDGE || PCI_SUBCLASS(class) != PCI_SUBCLASS_BRIDGE_HOST) return; switch (PCI_VENDOR(id)) { case PCI_VENDOR_INTEL: /* * In the wonderful world of virtualization you can * have the latest 64-bit AMD multicore CPU behind a * prehistoric Intel host bridge. Give them what they * deserve. */ switch (PCI_PRODUCT(id)) { case PCI_PRODUCT_INTEL_82441FX: /* QEMU */ case PCI_PRODUCT_INTEL_82443BX: /* VMWare */ break; default: pba->pba_flags |= PCI_FLAGS_MSI_ENABLED; break; } break; case PCI_VENDOR_NVIDIA: case PCI_VENDOR_AMD: pba->pba_flags |= PCI_FLAGS_MSI_ENABLED; break; } /* * Don't enable MSI on a HyperTransport bus. In order to * determine that bus 0 is a HyperTransport bus, we look at * device 24 function 0, which is the HyperTransport * host/primary interface integrated on most 64-bit AMD CPUs. * If that device has a HyperTransport capability, bus 0 must * be a HyperTransport bus and we disable MSI. */ tag = pci_make_tag(pc, 0, 24, 0); if (pci_get_capability(pc, tag, PCI_CAP_HT, NULL, NULL)) pba->pba_flags &= ~PCI_FLAGS_MSI_ENABLED; } int pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) { return (32); } pcitag_t pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function) { if (bus >= 256 || device >= 32 || function >= 8) panic("pci_make_tag: bad request"); return (PCI_MODE1_ENABLE | (bus << 16) | (device << 11) | (function << 8)); } void pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp, int *dp, int *fp) { if (bp != NULL) *bp = (tag >> 16) & 0xff; if (dp != NULL) *dp = (tag >> 11) & 0x1f; if (fp != NULL) *fp = (tag >> 8) & 0x7; } int pci_conf_size(pci_chipset_tag_t pc, pcitag_t tag) { int bus; if (pci_mcfg_addr) { pci_decompose_tag(pc, tag, &bus, NULL, NULL); if (bus >= pci_mcfg_min_bus && bus <= pci_mcfg_max_bus) return PCIE_CONFIG_SPACE_SIZE; } return PCI_CONFIG_SPACE_SIZE; } void pci_mcfg_map_bus(int bus) { if (pci_mcfgh[bus]) return; if (bus_space_map(pci_mcfgt, pci_mcfg_addr + (bus << 20), 1 << 20, 0, &pci_mcfgh[bus])) panic("pci_conf_read: cannot map mcfg space"); } pcireg_t pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) { pcireg_t data; int bus; KASSERT((reg & 0x3) == 0); if (pci_mcfg_addr && reg >= PCI_CONFIG_SPACE_SIZE) { pci_decompose_tag(pc, tag, &bus, NULL, NULL); if (bus >= pci_mcfg_min_bus && bus <= pci_mcfg_max_bus) { pci_mcfg_map_bus(bus); data = bus_space_read_4(pci_mcfgt, pci_mcfgh[bus], (tag & 0x000ff00) << 4 | reg); return data; } } PCI_CONF_LOCK(); outl(PCI_MODE1_ADDRESS_REG, tag | reg); data = inl(PCI_MODE1_DATA_REG); outl(PCI_MODE1_ADDRESS_REG, 0); PCI_CONF_UNLOCK(); return data; } void pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) { int bus; KASSERT((reg & 0x3) == 0); if (pci_mcfg_addr && reg >= PCI_CONFIG_SPACE_SIZE) { pci_decompose_tag(pc, tag, &bus, NULL, NULL); if (bus >= pci_mcfg_min_bus && bus <= pci_mcfg_max_bus) { pci_mcfg_map_bus(bus); bus_space_write_4(pci_mcfgt, pci_mcfgh[bus], (tag & 0x000ff00) << 4 | reg, data); return; } } PCI_CONF_LOCK(); outl(PCI_MODE1_ADDRESS_REG, tag | reg); outl(PCI_MODE1_DATA_REG, data); outl(PCI_MODE1_ADDRESS_REG, 0); PCI_CONF_UNLOCK(); } void msi_hwmask(struct pic *, int); void msi_hwunmask(struct pic *, int); void msi_addroute(struct pic *, struct cpu_info *, int, int, int); void msi_delroute(struct pic *, struct cpu_info *, int, int, int); struct pic msi_pic = { {0, {NULL}, NULL, 0, "msi", NULL, 0, 0}, PIC_MSI, #ifdef MULTIPROCESSOR {}, #endif msi_hwmask, msi_hwunmask, msi_addroute, msi_delroute, NULL, ioapic_edge_stubs }; void msi_hwmask(struct pic *pic, int pin) { } void msi_hwunmask(struct pic *pic, int pin) { } void msi_addroute(struct pic *pic, struct cpu_info *ci, int pin, int vec, int type) { pci_chipset_tag_t pc = NULL; /* XXX */ pcitag_t tag = pin; pcireg_t reg, addr; int off; if (pci_get_capability(pc, tag, PCI_CAP_MSI, &off, ®) == 0) panic("%s: no msi capability", __func__); addr = 0xfee00000UL | (ci->ci_apicid << 12); if (reg & PCI_MSI_MC_C64) { pci_conf_write(pc, tag, off + PCI_MSI_MA, addr); pci_conf_write(pc, tag, off + PCI_MSI_MAU32, 0); pci_conf_write(pc, tag, off + PCI_MSI_MD64, vec); } else { pci_conf_write(pc, tag, off + PCI_MSI_MA, addr); pci_conf_write(pc, tag, off + PCI_MSI_MD32, vec); } pci_conf_write(pc, tag, off, reg | PCI_MSI_MC_MSIE); } void msi_delroute(struct pic *pic, struct cpu_info *ci, int pin, int vec, int type) { pci_chipset_tag_t pc = NULL; /* XXX */ pcitag_t tag = pin; pcireg_t reg; int off; if (pci_get_capability(pc, tag, PCI_CAP_MSI, &off, ®) == 0) panic("%s: no msi capability", __func__); pci_conf_write(pc, tag, off, reg & ~PCI_MSI_MC_MSIE); } int pci_intr_map_msi(struct pci_attach_args *pa, pci_intr_handle_t *ihp) { pci_chipset_tag_t pc = pa->pa_pc; pcitag_t tag = pa->pa_tag; if ((pa->pa_flags & PCI_FLAGS_MSI_ENABLED) == 0 || mp_busses == NULL || pci_get_capability(pc, tag, PCI_CAP_MSI, NULL, NULL) == 0) return 1; ihp->tag = tag; ihp->line = APIC_INT_VIA_MSG; ihp->pin = 0; return 0; } int pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) { int pin = pa->pa_rawintrpin; int line = pa->pa_intrline; #if NIOAPIC > 0 struct mp_intr_map *mip; int bus, dev, func; #endif if (pin == 0) { /* No IRQ used. */ goto bad; } if (pin > PCI_INTERRUPT_PIN_MAX) { printf("pci_intr_map: bad interrupt pin %d\n", pin); goto bad; } ihp->tag = pa->pa_tag; ihp->line = line; ihp->pin = pin; #if NIOAPIC > 0 pci_decompose_tag(pa->pa_pc, pa->pa_tag, &bus, &dev, &func); if (mp_busses != NULL) { int mpspec_pin = (dev << 2) | (pin - 1); if (bus < mp_nbusses) { for (mip = mp_busses[bus].mb_intrs; mip != NULL; mip = mip->next) { if (&mp_busses[bus] == mp_isa_bus || &mp_busses[bus] == mp_eisa_bus) continue; if (mip->bus_pin == mpspec_pin) { ihp->line = mip->ioapic_ih | line; return 0; } } } if (pa->pa_bridgetag) { int swizpin = PPB_INTERRUPT_SWIZZLE(pin, dev); if (pa->pa_bridgeih[swizpin - 1].line != -1) { ihp->line = pa->pa_bridgeih[swizpin - 1].line; ihp->line |= line; return 0; } } /* * No explicit PCI mapping found. This is not fatal, * we'll try the ISA (or possibly EISA) mappings next. */ } #endif /* * Section 6.2.4, `Miscellaneous Functions', says that 255 means * `unknown' or `no connection' on a PC. We assume that a device with * `no connection' either doesn't have an interrupt (in which case the * pin number should be 0, and would have been noticed above), or * wasn't configured by the BIOS (in which case we punt, since there's * no real way we can know how the interrupt lines are mapped in the * hardware). * * XXX * Since IRQ 0 is only used by the clock, and we can't actually be sure * that the BIOS did its job, we also recognize that as meaning that * the BIOS has not configured the device. */ if (line == 0 || line == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) goto bad; if (line >= NUM_LEGACY_IRQS) { printf("pci_intr_map: bad interrupt line %d\n", line); goto bad; } if (line == 2) { printf("pci_intr_map: changed line 2 to line 9\n"); line = 9; } #if NIOAPIC > 0 if (mp_busses != NULL) { if (mip == NULL && mp_isa_bus) { for (mip = mp_isa_bus->mb_intrs; mip != NULL; mip = mip->next) { if (mip->bus_pin == line) { ihp->line = mip->ioapic_ih | line; return 0; } } } #if NEISA > 0 if (mip == NULL && mp_eisa_bus) { for (mip = mp_eisa_bus->mb_intrs; mip != NULL; mip = mip->next) { if (mip->bus_pin == line) { ihp->line = mip->ioapic_ih | line; return 0; } } } #endif if (mip == NULL) { printf("pci_intr_map: " "bus %d dev %d func %d pin %d; line %d\n", bus, dev, func, pin, line); printf("pci_intr_map: no MP mapping found\n"); } } #endif return 0; bad: ihp->line = -1; return 1; } const char * pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih) { static char irqstr[64]; if (ih.line == 0) panic("pci_intr_string: bogus handle 0x%x", ih.line); if (ih.line & APIC_INT_VIA_MSG) return ("msi"); #if NIOAPIC > 0 if (ih.line & APIC_INT_VIA_APIC) snprintf(irqstr, sizeof(irqstr), "apic %d int %d", APIC_IRQ_APIC(ih.line), APIC_IRQ_PIN(ih.line)); else snprintf(irqstr, sizeof(irqstr), "irq %d", pci_intr_line(pc, ih)); #else snprintf(irqstr, sizeof(irqstr), "irq %d", pci_intr_line(pc, ih)); #endif return (irqstr); } #include "acpiprt.h" #if NACPIPRT > 0 void acpiprt_route_interrupt(int bus, int dev, int pin); #endif void * pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg, const char *what) { int pin, irq; int bus, dev; pcitag_t tag = ih.tag; struct pic *pic; if (ih.line & APIC_INT_VIA_MSG) { return intr_establish(-1, &msi_pic, tag, IST_PULSE, level, func, arg, what); } pci_decompose_tag(pc, ih.tag, &bus, &dev, NULL); #if NACPIPRT > 0 acpiprt_route_interrupt(bus, dev, ih.pin); #endif pic = &i8259_pic; pin = irq = ih.line; #if NIOAPIC > 0 if (ih.line & APIC_INT_VIA_APIC) { pic = (struct pic *)ioapic_find(APIC_IRQ_APIC(ih.line)); if (pic == NULL) { printf("pci_intr_establish: bad ioapic %d\n", APIC_IRQ_APIC(ih.line)); return NULL; } pin = APIC_IRQ_PIN(ih.line); irq = APIC_IRQ_LEGACY_IRQ(ih.line); if (irq < 0 || irq >= NUM_LEGACY_IRQS) irq = -1; } #endif return intr_establish(irq, pic, pin, IST_LEVEL, level, func, arg, what); } void pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie) { intr_disestablish(cookie); } struct extent *pciio_ex; struct extent *pcimem_ex; struct extent *pcibus_ex; void pci_init_extents(void) { bios_memmap_t *bmp; u_int64_t size; if (pciio_ex == NULL) { /* * We only have 64K of addressable I/O space. * However, since BARs may contain garbage, we cover * the full 32-bit address space defined by PCI of * which we only make the first 64K available. */ pciio_ex = extent_create("pciio", 0, 0xffffffff, M_DEVBUF, NULL, 0, EX_NOWAIT | EX_FILLED); if (pciio_ex == NULL) return; extent_free(pciio_ex, 0, 0x10000, M_NOWAIT); } if (pcimem_ex == NULL) { /* * Cover the 36-bit address space addressable by PAE * here. As long as vendors continue to support * 32-bit operating systems, we should never see BARs * outside that region. */ pcimem_ex = extent_create("pcimem", 0, 0xfffffffff, M_DEVBUF, NULL, 0, EX_NOWAIT); if (pcimem_ex == NULL) return; for (bmp = bios_memmap; bmp->type != BIOS_MAP_END; bmp++) { /* * Ignore address space beyond 4G. */ if (bmp->addr >= 0x100000000ULL) continue; size = bmp->size; if (bmp->addr + size >= 0x100000000ULL) size = 0x100000000ULL - bmp->addr; /* Ignore zero-sized regions. */ if (size == 0) continue; if (extent_alloc_region(pcimem_ex, bmp->addr, size, EX_NOWAIT)) printf("memory map conflict 0x%llx/0x%llx\n", bmp->addr, bmp->size); } /* Take out the video buffer area and BIOS areas. */ extent_alloc_region(pcimem_ex, IOM_BEGIN, IOM_SIZE, EX_CONFLICTOK | EX_NOWAIT); } if (pcibus_ex == NULL) { pcibus_ex = extent_create("pcibus", 0, 0xff, M_DEVBUF, NULL, 0, EX_NOWAIT); } } #include "acpi.h" #if NACPI > 0 void acpi_pci_match(struct device *, struct pci_attach_args *); #endif void pci_dev_postattach(struct device *dev, struct pci_attach_args *pa) { #if NACPI > 0 acpi_pci_match(dev, pa); #endif } #if NACPI > 0 pcireg_t acpi_pci_min_powerstate(pci_chipset_tag_t, pcitag_t); #endif pcireg_t pci_min_powerstate(pci_chipset_tag_t pc, pcitag_t tag) { #if NACPI > 0 return acpi_pci_min_powerstate(pc, tag); #else return PCI_PMCSR_STATE_D3; #endif }