Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/aic7xxx/ahc_pci.c
Version:
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1 /*- 2 * FreeBSD, PCI product support functions 3 * 4 * Copyright (c) 1995-2001 Justin T. Gibbs 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * Alternatively, this software may be distributed under the terms of the 17 * GNU Public License ("GPL"). 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#19 $ 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD: releng/8.0/sys/dev/aic7xxx/ahc_pci.c 189575 2009-03-09 13:23:54Z imp $"); 36 37 #include <dev/aic7xxx/aic7xxx_osm.h> 38 39 static int ahc_pci_probe(device_t dev); 40 static int ahc_pci_attach(device_t dev); 41 42 static device_method_t ahc_pci_device_methods[] = { 43 /* Device interface */ 44 DEVMETHOD(device_probe, ahc_pci_probe), 45 DEVMETHOD(device_attach, ahc_pci_attach), 46 DEVMETHOD(device_detach, ahc_detach), 47 { 0, 0 } 48 }; 49 50 static driver_t ahc_pci_driver = { 51 "ahc", 52 ahc_pci_device_methods, 53 sizeof(struct ahc_softc) 54 }; 55 56 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0); 57 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1); 58 MODULE_VERSION(ahc_pci, 1); 59 60 static int 61 ahc_pci_probe(device_t dev) 62 { 63 struct ahc_pci_identity *entry; 64 65 entry = ahc_find_pci_device(dev); 66 if (entry != NULL) { 67 device_set_desc(dev, entry->name); 68 return (BUS_PROBE_DEFAULT); 69 } 70 return (ENXIO); 71 } 72 73 static int 74 ahc_pci_attach(device_t dev) 75 { 76 struct ahc_pci_identity *entry; 77 struct ahc_softc *ahc; 78 char *name; 79 int error; 80 81 entry = ahc_find_pci_device(dev); 82 if (entry == NULL) 83 return (ENXIO); 84 85 /* 86 * Allocate a softc for this card and 87 * set it up for attachment by our 88 * common detect routine. 89 */ 90 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 91 if (name == NULL) 92 return (ENOMEM); 93 strcpy(name, device_get_nameunit(dev)); 94 ahc = ahc_alloc(dev, name); 95 if (ahc == NULL) 96 return (ENOMEM); 97 98 ahc_set_unit(ahc, device_get_unit(dev)); 99 100 /* 101 * Should we bother disabling 39Bit addressing 102 * based on installed memory? 103 */ 104 if (sizeof(bus_addr_t) > 4) 105 ahc->flags |= AHC_39BIT_ADDRESSING; 106 107 /* Allocate a dmatag for our SCB DMA maps */ 108 /* XXX Should be a child of the PCI bus dma tag */ 109 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev), 110 /*alignment*/1, /*boundary*/0, 111 (ahc->flags & AHC_39BIT_ADDRESSING) 112 ? 0x7FFFFFFFFFLL 113 : BUS_SPACE_MAXADDR_32BIT, 114 /*highaddr*/BUS_SPACE_MAXADDR, 115 /*filter*/NULL, /*filterarg*/NULL, 116 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 117 /*nsegments*/AHC_NSEG, 118 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 119 /*flags*/0, 120 &ahc->parent_dmat); 121 122 if (error != 0) { 123 printf("ahc_pci_attach: Could not allocate DMA tag " 124 "- error %d\n", error); 125 ahc_free(ahc); 126 return (ENOMEM); 127 } 128 ahc->dev_softc = dev; 129 error = ahc_pci_config(ahc, entry); 130 if (error != 0) { 131 ahc_free(ahc); 132 return (error); 133 } 134 135 ahc_attach(ahc); 136 return (0); 137 } 138 139 int 140 ahc_pci_map_registers(struct ahc_softc *ahc) 141 { 142 struct resource *regs; 143 u_int command; 144 int regs_type; 145 int regs_id; 146 int allow_memio; 147 148 command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1); 149 regs = NULL; 150 regs_type = 0; 151 regs_id = 0; 152 153 /* Retrieve the per-device 'allow_memio' hint */ 154 if (resource_int_value(device_get_name(ahc->dev_softc), 155 device_get_unit(ahc->dev_softc), 156 "allow_memio", &allow_memio) != 0) { 157 if (bootverbose) 158 device_printf(ahc->dev_softc, "Defaulting to MEMIO "); 159 #ifdef AHC_ALLOW_MEMIO 160 if (bootverbose) 161 printf("on\n"); 162 allow_memio = 1; 163 #else 164 if (bootverbose) 165 printf("off\n"); 166 allow_memio = 0; 167 #endif 168 } 169 170 if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) { 171 172 regs_type = SYS_RES_MEMORY; 173 regs_id = AHC_PCI_MEMADDR; 174 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type, 175 ®s_id, RF_ACTIVE); 176 if (regs != NULL) { 177 ahc->tag = rman_get_bustag(regs); 178 ahc->bsh = rman_get_bushandle(regs); 179 180 /* 181 * Do a quick test to see if memory mapped 182 * I/O is functioning correctly. 183 */ 184 if (ahc_pci_test_register_access(ahc) != 0) { 185 device_printf(ahc->dev_softc, 186 "PCI Device %d:%d:%d failed memory " 187 "mapped test. Using PIO.\n", 188 aic_get_pci_bus(ahc->dev_softc), 189 aic_get_pci_slot(ahc->dev_softc), 190 aic_get_pci_function(ahc->dev_softc)); 191 bus_release_resource(ahc->dev_softc, regs_type, 192 regs_id, regs); 193 regs = NULL; 194 } else { 195 command &= ~PCIM_CMD_PORTEN; 196 aic_pci_write_config(ahc->dev_softc, 197 PCIR_COMMAND, 198 command, /*bytes*/1); 199 } 200 } 201 } 202 203 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) { 204 regs_type = SYS_RES_IOPORT; 205 regs_id = AHC_PCI_IOADDR; 206 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type, 207 ®s_id, RF_ACTIVE); 208 if (regs != NULL) { 209 ahc->tag = rman_get_bustag(regs); 210 ahc->bsh = rman_get_bushandle(regs); 211 if (ahc_pci_test_register_access(ahc) != 0) { 212 device_printf(ahc->dev_softc, 213 "PCI Device %d:%d:%d failed I/O " 214 "mapped test.\n", 215 aic_get_pci_bus(ahc->dev_softc), 216 aic_get_pci_slot(ahc->dev_softc), 217 aic_get_pci_function(ahc->dev_softc)); 218 bus_release_resource(ahc->dev_softc, regs_type, 219 regs_id, regs); 220 regs = NULL; 221 } else { 222 command &= ~PCIM_CMD_MEMEN; 223 aic_pci_write_config(ahc->dev_softc, 224 PCIR_COMMAND, 225 command, /*bytes*/1); 226 } 227 } 228 } 229 if (regs == NULL) { 230 device_printf(ahc->dev_softc, 231 "can't allocate register resources\n"); 232 return (ENOMEM); 233 } 234 ahc->platform_data->regs_res_type = regs_type; 235 ahc->platform_data->regs_res_id = regs_id; 236 ahc->platform_data->regs = regs; 237 return (0); 238 }
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