1/* $NetBSD: prep_pciconf_direct.c,v 1.10 2016/10/19 00:08:42 nonaka Exp $ */ 2 3/* 4 * Copyright (c) 2002 Klaus J. Klein. All rights reserved. 5 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1994 Charles M. Hannum. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles M. Hannum. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34/* 35 * Machine-specific functions for PCI autoconfiguration. 36 * 37 * This version is specific to the direct-mapped configuration space access 38 * such as implemented on the IBM 27-82650 PCI Bridge/Memory Controller. 39 */ 40 41#include <sys/cdefs.h> 42__KERNEL_RCSID(0, "$NetBSD: prep_pciconf_direct.c,v 1.10 2016/10/19 00:08:42 nonaka Exp $"); 43 44#include <sys/types.h> 45#include <sys/param.h> 46#include <sys/time.h> 47#include <sys/systm.h> 48#include <sys/errno.h> 49#include <sys/device.h> 50 51#include <uvm/uvm_extern.h> 52 53#define _POWERPC_BUS_DMA_PRIVATE 54#include <sys/bus.h> 55#include <machine/intr.h> 56#include <machine/platform.h> 57 58#include <powerpc/pio.h> 59 60#include <dev/isa/isavar.h> 61#include <dev/pci/pcivar.h> 62#include <dev/pci/pcireg.h> 63#include <dev/pci/pcidevs.h> 64 65#include <prop/proplib.h> 66 67#ifdef DEBUG 68#define DPRINTF(x) aprint_debug x 69#else 70#define DPRINTF(x) 71#endif 72 73/* Physical base address and size of PCI configuration space. */ 74#define PCI_DCONF_BASE 0x80800000 75#define PCI_DCONF_SIZE 0x00800000 76/* Device function selection. */ 77#define PCI_DCONF_FUNC 0x00000700 78#define PCI_DCONF_FUNC_SHIFT 8 79/* Configuration space register selection. */ 80#define PCI_DCONF_REG 0x000000ff 81#define PCI_DCONF_REG_SHIFT 0 82/* Device selection; those bits still available. */ 83#define PCI_DCONF_DEV \ 84 (~(~(PCI_DCONF_SIZE - 1) | PCI_DCONF_FUNC | PCI_DCONF_REG)) 85 86void prep_pci_direct_attach_hook(device_t, device_t, 87 struct pcibus_attach_args *); 88pcitag_t prep_pci_direct_make_tag(void *, int, int, int); 89pcireg_t prep_pci_direct_conf_read(void *, pcitag_t, int); 90void prep_pci_direct_conf_write(void *, pcitag_t, int, pcireg_t); 91void prep_pci_direct_decompose_tag(void *, pcitag_t, int *, int *, int *); 92 93void 94prep_pci_get_chipset_tag_direct(pci_chipset_tag_t pc) 95{ 96 97 pc->pc_conf_v = NULL; 98 99 pc->pc_attach_hook = prep_pci_direct_attach_hook; 100 pc->pc_bus_maxdevs = prep_pci_bus_maxdevs; 101 pc->pc_make_tag = prep_pci_direct_make_tag; 102 pc->pc_conf_read = prep_pci_direct_conf_read; 103 pc->pc_conf_write = prep_pci_direct_conf_write; 104 105 pc->pc_intr_v = NULL; 106 107 pc->pc_intr_map = prep_pci_intr_map; 108 pc->pc_intr_string = genppc_pci_intr_string; 109 pc->pc_intr_evcnt = genppc_pci_intr_evcnt; 110 pc->pc_intr_establish = genppc_pci_intr_establish; 111 pc->pc_intr_disestablish = genppc_pci_intr_disestablish; 112 pc->pc_intr_setattr = genppc_pci_intr_setattr; 113 pc->pc_intr_type = genppc_pci_intr_type; 114 pc->pc_intr_alloc = genppc_pci_intr_alloc; 115 pc->pc_intr_release = genppc_pci_intr_release; 116 pc->pc_intx_alloc = genppc_pci_intx_alloc; 117 118 pc->pc_msi_v = NULL; 119 genppc_pci_chipset_msi_init(pc); 120 121 pc->pc_msix_v = NULL; 122 genppc_pci_chipset_msix_init(pc); 123 124 pc->pc_conf_interrupt = genppc_pci_conf_interrupt; 125 pc->pc_decompose_tag = prep_pci_direct_decompose_tag; 126 pc->pc_conf_hook = prep_pci_conf_hook; 127} 128 129void 130prep_pci_direct_attach_hook(device_t parent, device_t self, 131 struct pcibus_attach_args *pba) 132{ 133 134 if (pba->pba_bus == 0) 135 aprint_normal(": direct-mapped configuration space access"); 136} 137 138pcitag_t 139prep_pci_direct_make_tag(void *v, int bus, int device, int function) 140{ 141 pcitag_t tag; 142 143 if (bus >= 256 || device >= 32 || function >= 8) 144 panic("prep_pci_direct_make_tag: bad request"); 145 146 tag = (bus << 16) | (device << 11) | (function << 8); 147 148 return tag; 149} 150 151void 152prep_pci_direct_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, 153 int *fp) 154{ 155 156 if (bp != NULL) 157 *bp = (tag >> 16) & 0xff; 158 if (dp != NULL) 159 *dp = (tag >> 11) & 0x1f; 160 if (fp != NULL) 161 *fp = (tag >> 8) & 0x7; 162 return; 163} 164 165pcireg_t 166prep_pci_direct_conf_read(void *v, pcitag_t tag, int reg) 167{ 168 pcireg_t data; 169 int bus, device, function; 170 int s; 171 172 if ((unsigned int)reg >= PCI_CONF_SIZE) 173 return (pcireg_t) ~0; 174 175 prep_pci_direct_decompose_tag(v, tag, &bus, &device, &function); 176 177 if (bus == 0) { 178 /* Check if device selector is within selector range. */ 179 if (1 << device & ~PCI_DCONF_DEV) { 180 data = ~0; 181 goto out; 182 } 183 tag = (1 << device) | (function << PCI_DCONF_FUNC_SHIFT); 184 } 185 186 s = splhigh(); 187 data = in32rb(PCI_DCONF_BASE | tag | reg); 188 splx(s); 189 190out: 191 return data; 192} 193 194void 195prep_pci_direct_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data) 196{ 197 int bus, device, function; 198 int s; 199 200 DPRINTF(("prep_pci_direct_conf_write(0x%lx, 0x%x, 0x%02x, 0x%08lx) ", 201 (unsigned long)v, tag, reg, (unsigned long)data)); 202 203 if ((unsigned int)reg >= PCI_CONF_SIZE) 204 return; 205 206 prep_pci_direct_decompose_tag(v, tag, &bus, &device, &function); 207 208 if (bus == 0) { 209 /* Check if device selector is within selector range. */ 210 if (1 << device & ~PCI_DCONF_DEV) { 211 /* Should never happen. */ 212 panic("prep_pci_direct_conf_write: bad device %d", 213 device); 214 } 215 tag = (1 << device) | (function << PCI_DCONF_FUNC_SHIFT); 216 } 217 218 s = splhigh(); 219 out32rb(PCI_DCONF_BASE | tag | reg, data); 220 splx(s); 221} 222