1 /* 2 * Linux driver attachment glue for PCI based controllers. 3 * 4 * Copyright (c) 2000-2001 Adaptec Inc. 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. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * substantially similar to the "NO WARRANTY" disclaimer below 15 * ("Disclaimer") and any redistribution must be conditioned upon 16 * including a substantially similar Disclaimer requirement for further 17 * binary redistribution. 18 * 3. Neither the names of the above-listed copyright holders nor the names 19 * of any contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * Alternatively, this software may be distributed under the terms of the 23 * GNU General Public License ("GPL") version 2 as published by the Free 24 * Software Foundation. 25 * 26 * NO WARRANTY 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGES. 38 * 39 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#47 $ 40 */ 41 42 #include "aic7xxx_osm.h" 43 #include "aic7xxx_pci.h" 44 45 static int ahc_linux_pci_dev_probe(struct pci_dev *pdev, 46 const struct pci_device_id *ent); 47 static int ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, 48 u_long *base); 49 static int ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc, 50 u_long *bus_addr, 51 uint8_t __iomem **maddr); 52 static void ahc_linux_pci_dev_remove(struct pci_dev *pdev); 53 54 /* Define the macro locally since it's different for different class of chips. 55 */ 56 #define ID(x) ID_C(x, PCI_CLASS_STORAGE_SCSI) 57 58 static struct pci_device_id ahc_linux_pci_id_table[] = { 59 /* aic7850 based controllers */ 60 ID(ID_AHA_2902_04_10_15_20C_30C), 61 /* aic7860 based controllers */ 62 ID(ID_AHA_2930CU), 63 ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK), 64 ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK), 65 ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK), 66 ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK), 67 /* aic7870 based controllers */ 68 ID(ID_AHA_2940), 69 ID(ID_AHA_3940), 70 ID(ID_AHA_398X), 71 ID(ID_AHA_2944), 72 ID(ID_AHA_3944), 73 ID(ID_AHA_4944), 74 /* aic7880 based controllers */ 75 ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK), 76 ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK), 77 ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK), 78 ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK), 79 ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK), 80 ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK), 81 ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK), 82 ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK), 83 ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK), 84 /* aic7890 based controllers */ 85 ID(ID_AHA_2930U2), 86 ID(ID_AHA_2940U2B), 87 ID(ID_AHA_2940U2_OEM), 88 ID(ID_AHA_2940U2), 89 ID(ID_AHA_2950U2B), 90 ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK), 91 ID(ID_AAA_131U2), 92 /* aic7890 based controllers */ 93 ID(ID_AHA_29160), 94 ID(ID_AHA_29160_CPQ), 95 ID(ID_AHA_29160N), 96 ID(ID_AHA_29160C), 97 ID(ID_AHA_29160B), 98 ID(ID_AHA_19160B), 99 ID(ID_AIC7892_ARO), 100 /* aic7892 based controllers */ 101 ID(ID_AHA_2940U_DUAL), 102 ID(ID_AHA_3940AU), 103 ID(ID_AHA_3944AU), 104 ID(ID_AIC7895_ARO), 105 ID(ID_AHA_3950U2B_0), 106 ID(ID_AHA_3950U2B_1), 107 ID(ID_AHA_3950U2D_0), 108 ID(ID_AHA_3950U2D_1), 109 ID(ID_AIC7896_ARO), 110 /* aic7899 based controllers */ 111 ID(ID_AHA_3960D), 112 ID(ID_AHA_3960D_CPQ), 113 ID(ID_AIC7899_ARO), 114 /* Generic chip probes for devices we don't know exactly. */ 115 ID(ID_AIC7850 & ID_DEV_VENDOR_MASK), 116 ID(ID_AIC7855 & ID_DEV_VENDOR_MASK), 117 ID(ID_AIC7859 & ID_DEV_VENDOR_MASK), 118 ID(ID_AIC7860 & ID_DEV_VENDOR_MASK), 119 ID(ID_AIC7870 & ID_DEV_VENDOR_MASK), 120 ID(ID_AIC7880 & ID_DEV_VENDOR_MASK), 121 ID16(ID_AIC7890 & ID_9005_GENERIC_MASK), 122 ID16(ID_AIC7892 & ID_9005_GENERIC_MASK), 123 ID(ID_AIC7895 & ID_DEV_VENDOR_MASK), 124 ID16(ID_AIC7896 & ID_9005_GENERIC_MASK), 125 ID16(ID_AIC7899 & ID_9005_GENERIC_MASK), 126 ID(ID_AIC7810 & ID_DEV_VENDOR_MASK), 127 ID(ID_AIC7815 & ID_DEV_VENDOR_MASK), 128 { 0 } 129 }; 130 131 MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table); 132 133 struct pci_driver aic7xxx_pci_driver = { 134 .name = "aic7xxx", 135 .probe = ahc_linux_pci_dev_probe, 136 .remove = ahc_linux_pci_dev_remove, 137 .id_table = ahc_linux_pci_id_table 138 }; 139 140 static void 141 ahc_linux_pci_dev_remove(struct pci_dev *pdev) 142 { 143 struct ahc_softc *ahc = pci_get_drvdata(pdev); 144 u_long s; 145 146 if (ahc->platform_data && ahc->platform_data->host) 147 scsi_remove_host(ahc->platform_data->host); 148 149 ahc_lock(ahc, &s); 150 ahc_intr_enable(ahc, FALSE); 151 ahc_unlock(ahc, &s); 152 ahc_free(ahc); 153 } 154 155 static void 156 ahc_linux_pci_inherit_flags(struct ahc_softc *ahc) 157 { 158 struct pci_dev *pdev = ahc->dev_softc, *master_pdev; 159 unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); 160 161 master_pdev = pci_get_slot(pdev->bus, master_devfn); 162 if (master_pdev) { 163 struct ahc_softc *master = pci_get_drvdata(master_pdev); 164 if (master) { 165 ahc->flags &= ~AHC_BIOS_ENABLED; 166 ahc->flags |= master->flags & AHC_BIOS_ENABLED; 167 168 ahc->flags &= ~AHC_PRIMARY_CHANNEL; 169 ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL; 170 } else 171 printk(KERN_ERR "aic7xxx: no multichannel peer found!\n"); 172 pci_dev_put(master_pdev); 173 } 174 } 175 176 static int 177 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 178 { 179 char buf[80]; 180 const uint64_t mask_39bit = 0x7FFFFFFFFFULL; 181 struct ahc_softc *ahc; 182 ahc_dev_softc_t pci; 183 struct ahc_pci_identity *entry; 184 char *name; 185 int error; 186 struct device *dev = &pdev->dev; 187 188 pci = pdev; 189 entry = ahc_find_pci_device(pci); 190 if (entry == NULL) 191 return (-ENODEV); 192 193 /* 194 * Allocate a softc for this card and 195 * set it up for attachment by our 196 * common detect routine. 197 */ 198 sprintf(buf, "ahc_pci:%d:%d:%d", 199 ahc_get_pci_bus(pci), 200 ahc_get_pci_slot(pci), 201 ahc_get_pci_function(pci)); 202 name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 203 if (name == NULL) 204 return (-ENOMEM); 205 strcpy(name, buf); 206 ahc = ahc_alloc(NULL, name); 207 if (ahc == NULL) 208 return (-ENOMEM); 209 if (pci_enable_device(pdev)) { 210 ahc_free(ahc); 211 return (-ENODEV); 212 } 213 pci_set_master(pdev); 214 215 if (sizeof(dma_addr_t) > 4 216 && ahc->features & AHC_LARGE_SCBS 217 && dma_set_mask(dev, mask_39bit) == 0 218 && dma_get_required_mask(dev) > DMA_32BIT_MASK) { 219 ahc->flags |= AHC_39BIT_ADDRESSING; 220 } else { 221 if (dma_set_mask(dev, DMA_32BIT_MASK)) { 222 printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); 223 return (-ENODEV); 224 } 225 } 226 ahc->dev_softc = pci; 227 error = ahc_pci_config(ahc, entry); 228 if (error != 0) { 229 ahc_free(ahc); 230 return (-error); 231 } 232 233 /* 234 * Second Function PCI devices need to inherit some 235 * settings from function 0. 236 */ 237 if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0) 238 ahc_linux_pci_inherit_flags(ahc); 239 240 pci_set_drvdata(pdev, ahc); 241 ahc_linux_register_host(ahc, &aic7xxx_driver_template); 242 return (0); 243 } 244 245 int 246 ahc_linux_pci_init(void) 247 { 248 /* Translate error or zero return into zero or one */ 249 return pci_module_init(&aic7xxx_pci_driver) ? 0 : 1; 250 } 251 252 void 253 ahc_linux_pci_exit(void) 254 { 255 pci_unregister_driver(&aic7xxx_pci_driver); 256 } 257 258 static int 259 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base) 260 { 261 if (aic7xxx_allow_memio == 0) 262 return (ENOMEM); 263 264 *base = pci_resource_start(ahc->dev_softc, 0); 265 if (*base == 0) 266 return (ENOMEM); 267 if (request_region(*base, 256, "aic7xxx") == 0) 268 return (ENOMEM); 269 return (0); 270 } 271 272 static int 273 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc, 274 u_long *bus_addr, 275 uint8_t __iomem **maddr) 276 { 277 u_long start; 278 int error; 279 280 error = 0; 281 start = pci_resource_start(ahc->dev_softc, 1); 282 if (start != 0) { 283 *bus_addr = start; 284 if (request_mem_region(start, 0x1000, "aic7xxx") == 0) 285 error = ENOMEM; 286 if (error == 0) { 287 *maddr = ioremap_nocache(start, 256); 288 if (*maddr == NULL) { 289 error = ENOMEM; 290 release_mem_region(start, 0x1000); 291 } 292 } 293 } else 294 error = ENOMEM; 295 return (error); 296 } 297 298 int 299 ahc_pci_map_registers(struct ahc_softc *ahc) 300 { 301 uint32_t command; 302 u_long base; 303 uint8_t __iomem *maddr; 304 int error; 305 306 /* 307 * If its allowed, we prefer memory mapped access. 308 */ 309 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4); 310 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); 311 base = 0; 312 maddr = NULL; 313 error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr); 314 if (error == 0) { 315 ahc->platform_data->mem_busaddr = base; 316 ahc->tag = BUS_SPACE_MEMIO; 317 ahc->bsh.maddr = maddr; 318 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, 319 command | PCIM_CMD_MEMEN, 4); 320 321 /* 322 * Do a quick test to see if memory mapped 323 * I/O is functioning correctly. 324 */ 325 if (ahc_pci_test_register_access(ahc) != 0) { 326 327 printf("aic7xxx: PCI Device %d:%d:%d " 328 "failed memory mapped test. Using PIO.\n", 329 ahc_get_pci_bus(ahc->dev_softc), 330 ahc_get_pci_slot(ahc->dev_softc), 331 ahc_get_pci_function(ahc->dev_softc)); 332 iounmap(maddr); 333 release_mem_region(ahc->platform_data->mem_busaddr, 334 0x1000); 335 ahc->bsh.maddr = NULL; 336 maddr = NULL; 337 } else 338 command |= PCIM_CMD_MEMEN; 339 } else { 340 printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx " 341 "unavailable. Cannot memory map device.\n", 342 ahc_get_pci_bus(ahc->dev_softc), 343 ahc_get_pci_slot(ahc->dev_softc), 344 ahc_get_pci_function(ahc->dev_softc), 345 base); 346 } 347 348 /* 349 * We always prefer memory mapped access. 350 */ 351 if (maddr == NULL) { 352 353 error = ahc_linux_pci_reserve_io_region(ahc, &base); 354 if (error == 0) { 355 ahc->tag = BUS_SPACE_PIO; 356 ahc->bsh.ioport = base; 357 command |= PCIM_CMD_PORTEN; 358 } else { 359 printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] " 360 "unavailable. Cannot map device.\n", 361 ahc_get_pci_bus(ahc->dev_softc), 362 ahc_get_pci_slot(ahc->dev_softc), 363 ahc_get_pci_function(ahc->dev_softc), 364 base); 365 } 366 } 367 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4); 368 return (error); 369 } 370 371 int 372 ahc_pci_map_int(struct ahc_softc *ahc) 373 { 374 int error; 375 376 error = request_irq(ahc->dev_softc->irq, ahc_linux_isr, 377 SA_SHIRQ, "aic7xxx", ahc); 378 if (error == 0) 379 ahc->platform_data->irq = ahc->dev_softc->irq; 380 381 return (-error); 382 } 383 384