/* $OpenBSD: pci_machdep.c,v 1.14 2008/06/26 05:42:09 ray 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. * * On PCs, there are two methods of generating PCI configuration cycles. * We try to detect the appropriate mechanism for this machine and set * up a few function pointers to access the correct method directly. * * The configuration method can be hard-coded in the config file by * using `options PCI_CONF_MODE=N', where `N' is the configuration mode * as defined section 3.6.4.1, `Generating Configuration Cycles'. */ #include #include #include #include #include #include #include #include #define _X86_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include #include #include "ioapic.h" #if NIOAPIC > 0 #include #include #endif int pci_mode = -1; #if defined(MULTIPROCESSOR) && 0 struct simplelock pci_conf_slock = SIMPLELOCK_INITIALIZER; #else struct simplelock pci_conf_slock = { 0 }; #endif #define PCI_CONF_LOCK(s) \ do { \ (s) = splhigh(); \ simple_lock(&pci_conf_slock); \ } while (0) #define PCI_CONF_UNLOCK(s) \ do { \ simple_unlock(&pci_conf_slock); \ splx((s)); \ } while (0) #define PCI_MODE1_ENABLE 0x80000000UL #define PCI_MODE1_ADDRESS_REG 0x0cf8 #define PCI_MODE1_DATA_REG 0x0cfc #define PCI_MODE2_ENABLE_REG 0x0cf8 #define PCI_MODE2_FORWARD_REG 0x0cfa #define _m1tag(b, d, f) \ (PCI_MODE1_ENABLE | ((b) << 16) | ((d) << 11) | ((f) << 8)) #define _qe(bus, dev, fcn, vend, prod) \ {_m1tag(bus, dev, fcn), PCI_ID_CODE(vend, prod)} struct { u_int32_t tag; pcireg_t id; } pcim1_quirk_tbl[] = { _qe(0, 0, 0, PCI_VENDOR_COMPAQ, PCI_PRODUCT_COMPAQ_TRIFLEX1), /* XXX Triflex2 not tested */ _qe(0, 0, 0, PCI_VENDOR_COMPAQ, PCI_PRODUCT_COMPAQ_TRIFLEX2), _qe(0, 0, 0, PCI_VENDOR_COMPAQ, PCI_PRODUCT_COMPAQ_TRIFLEX4), /* Triton needed for Connectix Virtual PC */ _qe(0, 0, 0, PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82437FX), /* Connectix Virtual PC 5 has a 440BX */ _qe(0, 0, 0, PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82443BX_NOAGP), {0, 0xffffffff} /* patchable */ }; #undef _m1tag #undef _qe /* * PCI doesn't have any special needs; just use the generic versions * of these functions. */ struct x86_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, NULL, _bus_dmamem_alloc, _bus_dmamem_free, _bus_dmamem_map, _bus_dmamem_unmap, _bus_dmamem_mmap, }; extern void amdgart_probe(struct pcibus_attach_args *); void pci_attach_hook(struct device *parent, struct device *self, struct pcibus_attach_args *pba) { if (pba->pba_bus == 0) { printf(": configuration mode %d", pci_mode); amdgart_probe(pba); } } int pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) { /* * Bus number is irrelevant. If Configuration Mechanism 2 is in * use, can only have devices 0-15 on any bus. If Configuration * Mechanism 1 is in use, can have devices 0-32 (i.e. the `normal' * range). */ if (pci_mode == 2) return (16); else return (32); } pcitag_t pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function) { pcitag_t tag; switch (pci_mode) { case 1: if (bus >= 256 || device >= 32 || function >= 8) panic("pci_make_tag: bad request"); tag.mode1 = PCI_MODE1_ENABLE | (bus << 16) | (device << 11) | (function << 8); break; case 2: if (bus >= 256 || device >= 16 || function >= 8) panic("pci_make_tag: bad request"); tag.mode2.port = 0xc000 | (device << 8); tag.mode2.enable = 0xf0 | (function << 1); tag.mode2.forward = bus; break; default: panic("pci_make_tag: mode not configured"); } return tag; } void pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp, int *dp, int *fp) { switch (pci_mode) { case 1: if (bp != NULL) *bp = (tag.mode1 >> 16) & 0xff; if (dp != NULL) *dp = (tag.mode1 >> 11) & 0x1f; if (fp != NULL) *fp = (tag.mode1 >> 8) & 0x7; break; case 2: if (bp != NULL) *bp = tag.mode2.forward & 0xff; if (dp != NULL) *dp = (tag.mode2.port >> 8) & 0xf; if (fp != NULL) *fp = (tag.mode2.enable >> 1) & 0x7; break; default: panic("pci_decompose_tag: mode not configured"); } } pcireg_t pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) { pcireg_t data; int s; PCI_CONF_LOCK(s); switch (pci_mode) { case 1: outl(PCI_MODE1_ADDRESS_REG, tag.mode1 | reg); data = inl(PCI_MODE1_DATA_REG); outl(PCI_MODE1_ADDRESS_REG, 0); break; case 2: outb(PCI_MODE2_ENABLE_REG, tag.mode2.enable); outb(PCI_MODE2_FORWARD_REG, tag.mode2.forward); data = inl(tag.mode2.port | reg); outb(PCI_MODE2_ENABLE_REG, 0); break; default: panic("pci_conf_read: mode not configured"); } PCI_CONF_UNLOCK(s); return data; } void pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) { int s; PCI_CONF_LOCK(s); switch (pci_mode) { case 1: outl(PCI_MODE1_ADDRESS_REG, tag.mode1 | reg); outl(PCI_MODE1_DATA_REG, data); outl(PCI_MODE1_ADDRESS_REG, 0); break; case 2: outb(PCI_MODE2_ENABLE_REG, tag.mode2.enable); outb(PCI_MODE2_FORWARD_REG, tag.mode2.forward); outl(tag.mode2.port | reg, data); outb(PCI_MODE2_ENABLE_REG, 0); break; default: panic("pci_conf_write: mode not configured"); } PCI_CONF_UNLOCK(s); } int pci_mode_detect(void) { #ifdef PCI_CONF_MODE #if (PCI_CONF_MODE == 1) || (PCI_CONF_MODE == 2) return (pci_mode = PCI_CONF_MODE); #else #error Invalid PCI configuration mode. #endif #else u_int32_t sav, val; int i; pcireg_t idreg; if (pci_mode != -1) return pci_mode; /* * We try to divine which configuration mode the host bridge wants. */ sav = inl(PCI_MODE1_ADDRESS_REG); pci_mode = 1; /* assume this for now */ /* * catch some known buggy implementations of mode 1 */ for (i = 0; i < sizeof(pcim1_quirk_tbl) / sizeof(pcim1_quirk_tbl[0]); i++) { pcitag_t t; if (!pcim1_quirk_tbl[i].tag) break; t.mode1 = pcim1_quirk_tbl[i].tag; idreg = pci_conf_read(0, t, PCI_ID_REG); /* needs "pci_mode" */ if (idreg == pcim1_quirk_tbl[i].id) { #ifdef DEBUG printf("known mode 1 PCI chipset (%08x)\n", idreg); #endif return (pci_mode); } } /* * Strong check for standard compliant mode 1: * 1. bit 31 ("enable") can be set * 2. byte/word access does not affect register */ outl(PCI_MODE1_ADDRESS_REG, PCI_MODE1_ENABLE); outb(PCI_MODE1_ADDRESS_REG + 3, 0); outw(PCI_MODE1_ADDRESS_REG + 2, 0); val = inl(PCI_MODE1_ADDRESS_REG); if ((val & 0x80fffffc) != PCI_MODE1_ENABLE) { #ifdef DEBUG printf("pci_mode_detect: mode 1 enable failed (%x)\n", val); #endif goto not1; } outl(PCI_MODE1_ADDRESS_REG, 0); val = inl(PCI_MODE1_ADDRESS_REG); if ((val & 0x80fffffc) != 0) goto not1; return (pci_mode); not1: outl(PCI_MODE1_ADDRESS_REG, sav); /* * This mode 2 check is quite weak (and known to give false * positives on some Compaq machines). * However, this doesn't matter, because this is the * last test, and simply no PCI devices will be found if * this happens. */ outb(PCI_MODE2_ENABLE_REG, 0); outb(PCI_MODE2_FORWARD_REG, 0); if (inb(PCI_MODE2_ENABLE_REG) != 0 || inb(PCI_MODE2_FORWARD_REG) != 0) goto not2; return (pci_mode = 2); not2: return (pci_mode = 0); #endif } int pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) { int pin = pa->pa_intrpin; int line = pa->pa_intrline; #if NIOAPIC > 0 int rawpin = pa->pa_rawintrpin; pci_chipset_tag_t pc = pa->pa_pc; int bus, dev, func; int mppin; #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; } #if NIOAPIC > 0 pci_decompose_tag(pc, pa->pa_tag, &bus, &dev, &func); if (mp_busses != NULL) { mppin = (dev << 2)|(rawpin - 1); if (intr_find_mpmapping(bus, mppin, ihp) == 0) { *ihp |= line; return 0; } if (pa->pa_bridgetag) { int pin = PPB_INTERRUPT_SWIZZLE(rawpin, dev); if (pa->pa_bridgeih[pin - 1] != -1) { *ihp = pa->pa_bridgeih[pin - 1]; *ihp |= 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 (mp_isa_bus != NULL && intr_find_mpmapping(mp_isa_bus->mb_idx, line, ihp) == 0) { *ihp |= line; return 0; } #if NEISA > 0 if (mp_eisa_bus != NULL && intr_find_mpmapping(mp_eisa_bus->mb_idx, line, ihp) == 0) { *ihp |= line; return 0; } #endif 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 *ihp = line; return 0; bad: *ihp = -1; return 1; } const char * pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih) { static char irqstr[64]; if (ih == 0) panic("pci_intr_string: bogus handle 0x%x", ih); #if NIOAPIC > 0 if (ih & APIC_INT_VIA_APIC) snprintf(irqstr, sizeof(irqstr), "apic %d int %d (irq %d)", APIC_IRQ_APIC(ih), APIC_IRQ_PIN(ih), ih&0xff); else snprintf(irqstr, sizeof(irqstr), "irq %d", ih&0xff); #else snprintf(irqstr, sizeof(irqstr), "irq %d", ih&0xff); #endif return (irqstr); } void * pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg, char *what) { int pin, irq; struct pic *pic; pic = &i8259_pic; pin = irq = ih; #if NIOAPIC > 0 if (ih & APIC_INT_VIA_APIC) { pic = (struct pic *)ioapic_find(APIC_IRQ_APIC(ih)); if (pic == NULL) { printf("pci_intr_establish: bad ioapic %d\n", APIC_IRQ_APIC(ih)); return NULL; } pin = APIC_IRQ_PIN(ih); irq = APIC_IRQ_LEGACY_IRQ(ih); 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); } /* * Determine which flags should be passed to the primary PCI bus's * autoconfiguration node. We use this to detect broken chipsets * which cannot safely use memory-mapped device access. */ int pci_bus_flags(void) { int rval = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; int device, maxndevs; pcitag_t tag; pcireg_t id; maxndevs = pci_bus_maxdevs(NULL, 0); for (device = 0; device < maxndevs; device++) { tag = pci_make_tag(NULL, 0, device, 0); id = pci_conf_read(NULL, tag, PCI_ID_REG); /* Invalid vendor ID value? */ if (PCI_VENDOR(id) == PCI_VENDOR_INVALID) continue; /* XXX Not invalid, but we've done this ~forever. */ if (PCI_VENDOR(id) == 0) continue; switch (PCI_VENDOR(id)) { case PCI_VENDOR_SIS: switch (PCI_PRODUCT(id)) { case PCI_PRODUCT_SIS_85C496: goto disable_mem; } break; } } return (rval); disable_mem: printf("Warning: broken PCI-Host bridge detected; " "disabling memory-mapped access\n"); rval &= ~(PCI_FLAGS_MEM_ENABLED); return (rval); }