/* $NetBSD: pci_machdep.c,v 1.38 2023/12/20 15:29:06 thorpej Exp $ */ /* * 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 __KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.38 2023/12/20 15:29:06 thorpej Exp $"); #include "opt_pci.h" #include #include #include #include #include #include #include #include #include #define _POWERPC_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include struct powerpc_bus_dma_tag pci_bus_dma_tag = { 0, /* _bounce_thresh */ _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, /* _dmamap_sync */ _bus_dmamem_alloc, _bus_dmamem_free, _bus_dmamem_map, _bus_dmamem_unmap, _bus_dmamem_mmap, }; /*#define EPIC_DEBUGIRQ*/ static int brdtype; #define BRD_SANDPOINTX2 2 #define BRD_SANDPOINTX3 3 #define BRD_ENCOREPP1 10 #define BRD_KUROBOX 100 #define BRD_QNAPTS 101 #define BRD_SYNOLOGY 102 #define BRD_STORCENTER 103 #define BRD_DLINKDSM 104 #define BRD_NH230NAS 105 #define BRD_UNKNOWN -1 #define PCI_CONFIG_ENABLE 0x80000000UL void pci_attach_hook(device_t parent, device_t self, struct pcibus_attach_args *pba) { pcitag_t tag; pcireg_t dev11, dev22, dev15, dev13, dev16; tag = pci_make_tag(pba->pba_pc, pba->pba_bus, 11, 0); dev11 = pci_conf_read(pba->pba_pc, tag, PCI_CLASS_REG); if (PCI_CLASS(dev11) == PCI_CLASS_BRIDGE) { /* WinBond/Symphony Lab 83C553 at dev 11 */ /* * XXX distinguish SP3 from SP2 by fiddling ISA GPIO #7/6. * XXX SP3 #7 output values loopback to #6 input. */ brdtype = BRD_SANDPOINTX3; return; } tag = pci_make_tag(pba->pba_pc, pba->pba_bus, 22, 0); dev22 = pci_conf_read(pba->pba_pc, tag, PCI_CLASS_REG); if (PCI_CLASS(dev22) == PCI_CLASS_BRIDGE) { /* VIA 82C686B at dev 22 */ brdtype = BRD_ENCOREPP1; return; } tag = pci_make_tag(pba->pba_pc, pba->pba_bus, 11, 0); dev11 = pci_conf_read(pba->pba_pc, tag, PCI_CLASS_REG); if (PCI_CLASS(dev11) == PCI_CLASS_NETWORK) { /* tlp (ADMtek AN985) or re (RealTek 8169S) at dev 11 */ brdtype = BRD_KUROBOX; return; } tag = pci_make_tag(pba->pba_pc, pba->pba_bus, 15, 0); dev15 = pci_conf_read(pba->pba_pc, tag, PCI_ID_REG); if (PCI_VENDOR(dev15) == PCI_VENDOR_MARVELL) { /* Marvell GbE at dev 15 */ brdtype = BRD_SYNOLOGY; return; } tag = pci_make_tag(pba->pba_pc, pba->pba_bus, 13, 0); dev13 = pci_conf_read(pba->pba_pc, tag, PCI_ID_REG); if (PCI_VENDOR(dev13) == PCI_VENDOR_VIATECH) { /* VIA 6410 PCIIDE at dev 13 */ brdtype = BRD_STORCENTER; return; } tag = pci_make_tag(pba->pba_pc, pba->pba_bus, 16, 0); dev16 = pci_conf_read(pba->pba_pc, tag, PCI_ID_REG); if (PCI_VENDOR(dev16) == PCI_VENDOR_ACARD) { /* ACARD ATP865 at dev 16 */ brdtype = BRD_DLINKDSM; return; } if (PCI_VENDOR(dev16) == PCI_VENDOR_ITE || PCI_VENDOR(dev16) == PCI_VENDOR_CMDTECH) { brdtype = BRD_NH230NAS; return; } if (PCI_VENDOR(dev15) == PCI_VENDOR_INTEL || PCI_VENDOR(dev15) == PCI_VENDOR_REALTEK) { /* Intel or Realtek GbE at dev 15 */ brdtype = BRD_QNAPTS; return; } brdtype = BRD_UNKNOWN; } 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) { pcitag_t tag; if (bus >= 256 || device >= 32 || function >= 8) panic("pci_make_tag: bad request"); tag = PCI_CONFIG_ENABLE | (bus << 16) | (device << 11) | (function << 8); return tag; } 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; return; } /* * The Kahlua documentation says that "reg" should be left-shifted by two * and be in bits 2-7. Apparently not. It doesn't work that way, and the * DINK32 ROM doesn't do it that way (I peeked at 0xfec00000 after running * the DINK32 "pcf" command). */ pcireg_t pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) { pcireg_t data; if ((unsigned int)reg >= PCI_CONF_SIZE) return (pcireg_t) -1; out32rb(SANDPOINT_PCI_CONFIG_ADDR, tag | reg); data = in32rb(SANDPOINT_PCI_CONFIG_DATA); out32rb(SANDPOINT_PCI_CONFIG_ADDR, 0); return data; } void pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) { if ((unsigned int)reg >= PCI_CONF_SIZE) return; out32rb(SANDPOINT_PCI_CONFIG_ADDR, tag | reg); out32rb(SANDPOINT_PCI_CONFIG_DATA, data); out32rb(SANDPOINT_PCI_CONFIG_ADDR, 0); } int pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) { int pin = pa->pa_intrpin; int line = pa->pa_intrline; /* No IRQ used. */ if (pin == 0) goto bad; if (pin > 4) { aprint_error("pci_intr_map: bad interrupt pin %d\n", pin); goto bad; } /* * 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 == 255) { aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin); goto bad; } #ifdef EPIC_DEBUGIRQ printf("line %d, pin %c", line, pin + '@'); #endif switch (brdtype) { /* Sandpoint has 4 PCI slots in a weird order. * From next to MPMC mezzanine card toward the board edge, * 64bit slot PCI AD14 * 64bit slot PCI AD13 * 32bit slot PCI AD16 * 32bit slot PCI AD15 * Don't believe identifying labels printed on PCB and * documents confusing as well since Moto names the slots * as number 1 origin. */ case BRD_SANDPOINTX3: /* * Sandpoint X3 brd uses EPIC serial mode IRQ. * - i8259 PIC interrupt to EPIC IRQ0. * - WinBond IDE PCI C/D to EPIC IRQ8/9. * - PCI AD13 pin A to EPIC IRQ2. * - PCI AD14 pin A to EPIC IRQ3. * - PCI AD15 pin A to EPIC IRQ4. * - PCI AD16 pin A to EPIC IRQ5. */ if (line == 11 && pa->pa_function == 1 && pa->pa_bus == 0) { /* X3 wires 83c553 pin C,D to EPIC IRQ8,9 */ *ihp = 8; /* pin C only, indeed */ break; } if (line < 13 || line > 16) { aprint_error("pci_intr_map: bad interrupt line %d,%c\n", line, pin + '@'); goto bad; } line -= 13; /* B/C/D is not available */ *ihp = 2 + line; break; case BRD_SANDPOINTX2: /* * Sandpoint X2 brd uses EPIC direct mode IRQ. * - i8259 PIC interrupt EPIC IRQ2. * - PCI AD13 pin A,B,C,D to EPIC IRQ0,1,2,3. * - PCI AD14 pin A,B,C,D to EPIC IRQ1,2,3,0. * - PCI AD15 pin A,B,C,D to EPIC IRQ2,3,0,1. * - PCI AD16 pin A,B,C,D to EPIC IRQ3,0,1,2. * - PCI AD12 is wired to PMPC device itself. */ if (line == 11 && pa->pa_function == 1 && pa->pa_bus == 0) { /* 83C553 PCI IDE comes thru EPIC IRQ2 */ *ihp = 2; break; } if (line < 13 || line > 16) { aprint_error("pci_intr_map: bad interrupt line %d,%c\n", line, pin + '@'); goto bad; } line -= 13; pin -= 1; *ihp = (line + pin) & 03; break; case BRD_ENCOREPP1: /* * Ampro EnCorePP1 brd uses EPIC direct mode IRQ. * PDF says VIA 686B SB i8259 interrupt goes through EPC IRQ0, * while PCI pin A-D are tied with EPIC IRQ1-4. * * It mentions i82559 is at AD24, however, found at AD25 instead. * Heuristics show that i82559 responds to EPIC 2 (!). Then we * decided to return EPIC 2 here since i82559 is the only one PCI * device ENCPP1 can have; */ if (pa->pa_device != 25) goto bad; /* eeh !? */ *ihp = 2; break; case BRD_KUROBOX: /* map line 11,12,13,14 to EPIC IRQ 0,1,4,3 */ *ihp = (line == 13) ? 4 : line - 11; break; case BRD_QNAPTS: /* map line 13-16 to EPIC IRQ0-3 */ *ihp = line - 13; break; case BRD_SYNOLOGY: /* map line 12,13-15 to EPIC IRQ 4,0-2 */ *ihp = (line == 12) ? 4 : line - 13; break; case BRD_DLINKDSM: /* map line 13,14A,14B,14C,15,16 to EPIC IRQ 0,1,1,2,3,4 */ *ihp = (line < 15) ? line - 13 : line - 12; if (line == 14 && pin == 3) *ihp += 1; /* USB pin C (EHCI) uses next IRQ */ break; case BRD_NH230NAS: /* map line 13,14,15,16 to EPIC IRQ0,3,1,2 */ *ihp = (line == 16) ? 2 : (line == 15) ? 1 : (line == 14) ? 3 : 0; break; case BRD_STORCENTER: /* map line 13,14A,14B,14C,15 to EPIC IRQ 1,2,3,4,0 */ *ihp = (line == 15) ? 0 : (line == 13) ? 1 : 1 + pin; break; default: /* simply map line 12-15 to EPIC IRQ0-3 */ *ihp = line - 12; #if defined(DIAGNOSTIC) || defined(DEBUG) printf("pci_intr_map: line %d, pin %c for unknown board" " mapped to irq %d\n", line, pin + '@', *ihp); #endif break; } #ifdef EPIC_DEBUGIRQ printf(" = EPIC %d\n", *ihp); #endif return 0; bad: *ihp = -1; return 1; } const char * pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih, char *buf, size_t len) { if (ih < 0 || ih >= OPENPIC_ICU) panic("pci_intr_string: bogus handle 0x%x", ih); snprintf(buf, len, "irq %d", ih + I8259_ICU); return buf; } const struct evcnt * pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) { /* XXX for now, no evcnt parent reported */ return NULL; } int pci_intr_setattr(pci_chipset_tag_t pc, pci_intr_handle_t *ih, int attr, uint64_t data) { switch (attr) { case PCI_INTR_MPSAFE: return 0; default: return ENODEV; } } void * pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg) { return pci_intr_establish_xname(pc, ih, level, func, arg, NULL); } void * pci_intr_establish_xname(pci_chipset_tag_t pc, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg, const char *xname) { int type; if (brdtype == BRD_STORCENTER && ih == 1) { /* * XXX This is a workaround for the VT6410 IDE controller! * Apparently its interrupt cannot be disabled and remains * asserted during the whole device probing procedure, * causing an interrupt storm. * Using an edge-trigger fixes that and triggers the * interrupt only once during probing. */ type = IST_EDGE; } else type = IST_LEVEL; /* * ih is the value assigned in pci_intr_map(), above. * It's the EPIC IRQ #. */ return intr_establish_xname(ih + I8259_ICU, type, level, func, arg, xname); } void pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie) { intr_disestablish(cookie); } #if defined(PCI_NETBSD_CONFIGURE) void pci_conf_interrupt(pci_chipset_tag_t pc, int bus, int dev, int pin, int swiz, int *iline) { if (bus == 0) { *iline = dev; } else { /* * If we are not on bus zero, we're behind a bridge, so we * swizzle. * * The documentation lies about this. In slot 3 (numbering * from 0) aka device 16, INTD# becomes an interrupt for * slot 2. INTC# becomes an interrupt for slot 1, etc. * In slot 2 aka device 16, INTD# becomes an interrupt for * slot 1, etc. * * Verified for INTD# on device 16, INTC# on device 16, * INTD# on device 15, INTD# on device 13, and INTC# on * device 14. I presume that the rest follow the same * pattern. * * Slot 0 is device 13, and is the base for the rest. */ *iline = 13 + ((swiz + dev + 3) & 3); } } #endif pci_intr_type_t pci_intr_type(pci_chipset_tag_t pc, pci_intr_handle_t ih) { return PCI_INTR_TYPE_INTX; } int pci_intr_alloc(const struct pci_attach_args *pa, pci_intr_handle_t **ihps, int *counts, pci_intr_type_t max_type) { if (counts != NULL && counts[PCI_INTR_TYPE_INTX] == 0) return EINVAL; return pci_intx_alloc(pa, ihps); } void pci_intr_release(pci_chipset_tag_t pc, pci_intr_handle_t *pih, int count) { kmem_free(pih, sizeof(*pih)); } int pci_intx_alloc(const struct pci_attach_args *pa, pci_intr_handle_t **ihpp) { pci_intr_handle_t *ihp; ihp = kmem_alloc(sizeof(*ihp), KM_SLEEP); if (pci_intr_map(pa, ihp)) { kmem_free(ihp, sizeof(*ihp)); return EINVAL; } *ihpp = ihp; return 0; } /* experimental MSI support */ int pci_msi_alloc(const struct pci_attach_args *pa, pci_intr_handle_t **ihps, int *count) { return EOPNOTSUPP; } int pci_msi_alloc_exact(const struct pci_attach_args *pa, pci_intr_handle_t **ihps, int count) { return EOPNOTSUPP; } /* experimental MSI-X support */ int pci_msix_alloc(const struct pci_attach_args *pa, pci_intr_handle_t **ihps, int *count) { return EOPNOTSUPP; } int pci_msix_alloc_exact(const struct pci_attach_args *pa, pci_intr_handle_t **ihps, int count) { return EOPNOTSUPP; } int pci_msix_alloc_map(const struct pci_attach_args *pa, pci_intr_handle_t **ihps, u_int *table_indexes, int count) { return EOPNOTSUPP; }