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; 144 u_long l; 145 146 /* 147 * We should be able to just perform 148 * the free directly, but check our 149 * list for extra sanity. 150 */ 151 ahc_list_lock(&l); 152 ahc = ahc_find_softc((struct ahc_softc *)pci_get_drvdata(pdev)); 153 if (ahc != NULL) { 154 u_long s; 155 156 TAILQ_REMOVE(&ahc_tailq, ahc, links); 157 ahc_list_unlock(&l); 158 ahc_lock(ahc, &s); 159 ahc_intr_enable(ahc, FALSE); 160 ahc_unlock(ahc, &s); 161 ahc_free(ahc); 162 } else 163 ahc_list_unlock(&l); 164 } 165 166 static int 167 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 168 { 169 char buf[80]; 170 const uint64_t mask_39bit = 0x7FFFFFFFFFULL; 171 struct ahc_softc *ahc; 172 ahc_dev_softc_t pci; 173 struct ahc_pci_identity *entry; 174 char *name; 175 int error; 176 177 /* 178 * Some BIOSen report the same device multiple times. 179 */ 180 TAILQ_FOREACH(ahc, &ahc_tailq, links) { 181 struct pci_dev *probed_pdev; 182 183 probed_pdev = ahc->dev_softc; 184 if (probed_pdev->bus->number == pdev->bus->number 185 && probed_pdev->devfn == pdev->devfn) 186 break; 187 } 188 if (ahc != NULL) { 189 /* Skip duplicate. */ 190 return (-ENODEV); 191 } 192 193 pci = pdev; 194 entry = ahc_find_pci_device(pci); 195 if (entry == NULL) 196 return (-ENODEV); 197 198 /* 199 * Allocate a softc for this card and 200 * set it up for attachment by our 201 * common detect routine. 202 */ 203 sprintf(buf, "ahc_pci:%d:%d:%d", 204 ahc_get_pci_bus(pci), 205 ahc_get_pci_slot(pci), 206 ahc_get_pci_function(pci)); 207 name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 208 if (name == NULL) 209 return (-ENOMEM); 210 strcpy(name, buf); 211 ahc = ahc_alloc(NULL, name); 212 if (ahc == NULL) 213 return (-ENOMEM); 214 if (pci_enable_device(pdev)) { 215 ahc_free(ahc); 216 return (-ENODEV); 217 } 218 pci_set_master(pdev); 219 220 if (sizeof(dma_addr_t) > 4 221 && ahc_linux_get_memsize() > 0x80000000 222 && pci_set_dma_mask(pdev, mask_39bit) == 0) { 223 ahc->flags |= AHC_39BIT_ADDRESSING; 224 ahc->platform_data->hw_dma_mask = mask_39bit; 225 } else { 226 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) { 227 printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); 228 return (-ENODEV); 229 } 230 ahc->platform_data->hw_dma_mask = DMA_32BIT_MASK; 231 } 232 ahc->dev_softc = pci; 233 error = ahc_pci_config(ahc, entry); 234 if (error != 0) { 235 ahc_free(ahc); 236 return (-error); 237 } 238 pci_set_drvdata(pdev, ahc); 239 if (aic7xxx_detect_complete) { 240 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 241 ahc_linux_register_host(ahc, &aic7xxx_driver_template); 242 #else 243 printf("aic7xxx: ignoring PCI device found after " 244 "initialization\n"); 245 return (-ENODEV); 246 #endif 247 } 248 return (0); 249 } 250 251 int 252 ahc_linux_pci_init(void) 253 { 254 /* Translate error or zero return into zero or one */ 255 return pci_module_init(&aic7xxx_pci_driver) ? 0 : 1; 256 } 257 258 void 259 ahc_linux_pci_exit(void) 260 { 261 pci_unregister_driver(&aic7xxx_pci_driver); 262 } 263 264 static int 265 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base) 266 { 267 if (aic7xxx_allow_memio == 0) 268 return (ENOMEM); 269 270 *base = pci_resource_start(ahc->dev_softc, 0); 271 if (*base == 0) 272 return (ENOMEM); 273 if (request_region(*base, 256, "aic7xxx") == 0) 274 return (ENOMEM); 275 return (0); 276 } 277 278 static int 279 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc, 280 u_long *bus_addr, 281 uint8_t __iomem **maddr) 282 { 283 u_long start; 284 int error; 285 286 error = 0; 287 start = pci_resource_start(ahc->dev_softc, 1); 288 if (start != 0) { 289 *bus_addr = start; 290 if (request_mem_region(start, 0x1000, "aic7xxx") == 0) 291 error = ENOMEM; 292 if (error == 0) { 293 *maddr = ioremap_nocache(start, 256); 294 if (*maddr == NULL) { 295 error = ENOMEM; 296 release_mem_region(start, 0x1000); 297 } 298 } 299 } else 300 error = ENOMEM; 301 return (error); 302 } 303 304 int 305 ahc_pci_map_registers(struct ahc_softc *ahc) 306 { 307 uint32_t command; 308 u_long base; 309 uint8_t __iomem *maddr; 310 int error; 311 312 /* 313 * If its allowed, we prefer memory mapped access. 314 */ 315 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4); 316 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); 317 base = 0; 318 maddr = NULL; 319 error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr); 320 if (error == 0) { 321 ahc->platform_data->mem_busaddr = base; 322 ahc->tag = BUS_SPACE_MEMIO; 323 ahc->bsh.maddr = maddr; 324 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, 325 command | PCIM_CMD_MEMEN, 4); 326 327 /* 328 * Do a quick test to see if memory mapped 329 * I/O is functioning correctly. 330 */ 331 if (ahc_pci_test_register_access(ahc) != 0) { 332 333 printf("aic7xxx: PCI Device %d:%d:%d " 334 "failed memory mapped test. Using PIO.\n", 335 ahc_get_pci_bus(ahc->dev_softc), 336 ahc_get_pci_slot(ahc->dev_softc), 337 ahc_get_pci_function(ahc->dev_softc)); 338 iounmap(maddr); 339 release_mem_region(ahc->platform_data->mem_busaddr, 340 0x1000); 341 ahc->bsh.maddr = NULL; 342 maddr = NULL; 343 } else 344 command |= PCIM_CMD_MEMEN; 345 } else { 346 printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx " 347 "unavailable. Cannot memory map device.\n", 348 ahc_get_pci_bus(ahc->dev_softc), 349 ahc_get_pci_slot(ahc->dev_softc), 350 ahc_get_pci_function(ahc->dev_softc), 351 base); 352 } 353 354 /* 355 * We always prefer memory mapped access. 356 */ 357 if (maddr == NULL) { 358 359 error = ahc_linux_pci_reserve_io_region(ahc, &base); 360 if (error == 0) { 361 ahc->tag = BUS_SPACE_PIO; 362 ahc->bsh.ioport = base; 363 command |= PCIM_CMD_PORTEN; 364 } else { 365 printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] " 366 "unavailable. Cannot map device.\n", 367 ahc_get_pci_bus(ahc->dev_softc), 368 ahc_get_pci_slot(ahc->dev_softc), 369 ahc_get_pci_function(ahc->dev_softc), 370 base); 371 } 372 } 373 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4); 374 return (error); 375 } 376 377 int 378 ahc_pci_map_int(struct ahc_softc *ahc) 379 { 380 int error; 381 382 error = request_irq(ahc->dev_softc->irq, ahc_linux_isr, 383 SA_SHIRQ, "aic7xxx", ahc); 384 if (error == 0) 385 ahc->platform_data->irq = ahc->dev_softc->irq; 386 387 return (-error); 388 } 389 390