drivers/scsi/aic7xxx/aic79xx_osm_pci.c

   1 /*
   2  * Linux driver attachment glue for PCI based U320 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/aic79xx_osm_pci.c#25 $
  40  */
  41
  42 #include "aic79xx_osm.h"
  43 #include "aic79xx_inline.h"
  44
  45 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
  46 struct pci_device_id
  47 {
  48 };
  49 #endif
  50
  51 static int      ahd_linux_pci_dev_probe(struct pci_dev *pdev,
  52                                         const struct pci_device_id *ent);
  53 static int      ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd,
  54                                                  u_long *base, u_long *base2);
  55 static int      ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
  56                                                  u_long *bus_addr,
  57                                                  uint8_t **maddr);
  58 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
  59 static void     ahd_linux_pci_dev_remove(struct pci_dev *pdev);
  60
  61 /* We do our own ID filtering.  So, grab all SCSI storage class devices. */
  62 static struct pci_device_id ahd_linux_pci_id_table[] = {
  63         {
  64                 0x9005, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
  65                 PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0
  66         },
  67         {
  68                 0x9005, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
  69                 PCI_CLASS_STORAGE_RAID << 8, 0xFFFF00, 0
  70         },
  71         { 0 }
  72 };
  73
  74 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
  75
  76 struct pci_driver aic79xx_pci_driver = {
  77         .name           = "aic79xx",
  78         .probe          = ahd_linux_pci_dev_probe,
  79         .remove         = ahd_linux_pci_dev_remove,
  80         .id_table       = ahd_linux_pci_id_table
  81 };
  82
  83 static void
  84 ahd_linux_pci_dev_remove(struct pci_dev *pdev)
  85 {
  86         struct ahd_softc *ahd;
  87         u_long l;
  88
  89         /*
  90          * We should be able to just perform
  91          * the free directly, but check our
  92          * list for extra sanity.
  93          */
  94         ahd_list_lock(&l);
  95         ahd = ahd_find_softc((struct ahd_softc *)pci_get_drvdata(pdev));
  96         if (ahd != NULL) {
  97                 u_long s;
  98
  99                 TAILQ_REMOVE(&ahd_tailq, ahd, links);
 100                 ahd_list_unlock(&l);
 101                 ahd_lock(ahd, &s);
 102                 ahd_intr_enable(ahd, FALSE);
 103                 ahd_unlock(ahd, &s);
 104                 ahd_free(ahd);
 105         } else
 106                 ahd_list_unlock(&l);
 107 }
 108 #endif /* !LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) */
 109
 110 static int
 111 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 112 {
 113         char             buf[80];
 114         struct           ahd_softc *ahd;
 115         ahd_dev_softc_t  pci;
 116         struct           ahd_pci_identity *entry;
 117         char            *name;
 118         int              error;
 119
 120         /*
 121          * Some BIOSen report the same device multiple times.
 122          */
 123         TAILQ_FOREACH(ahd, &ahd_tailq, links) {
 124                 struct pci_dev *probed_pdev;
 125
 126                 probed_pdev = ahd->dev_softc;
 127                 if (probed_pdev->bus->number == pdev->bus->number
 128                  && probed_pdev->devfn == pdev->devfn)
 129                         break;
 130         }
 131         if (ahd != NULL) {
 132                 /* Skip duplicate. */
 133                 return (-ENODEV);
 134         }
 135
 136         pci = pdev;
 137         entry = ahd_find_pci_device(pci);
 138         if (entry == NULL)
 139                 return (-ENODEV);
 140
 141         /*
 142          * Allocate a softc for this card and
 143          * set it up for attachment by our
 144          * common detect routine.
 145          */
 146         sprintf(buf, "ahd_pci:%d:%d:%d",
 147                 ahd_get_pci_bus(pci),
 148                 ahd_get_pci_slot(pci),
 149                 ahd_get_pci_function(pci));
 150         name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
 151         if (name == NULL)
 152                 return (-ENOMEM);
 153         strcpy(name, buf);
 154         ahd = ahd_alloc(NULL, name);
 155         if (ahd == NULL)
 156                 return (-ENOMEM);
 157 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 158         if (pci_enable_device(pdev)) {
 159                 ahd_free(ahd);
 160                 return (-ENODEV);
 161         }
 162         pci_set_master(pdev);
 163
 164         if (sizeof(bus_addr_t) > 4) {
 165                 uint64_t   memsize;
 166                 bus_addr_t mask_64bit;
 167                 bus_addr_t mask_39bit;
 168
 169                 memsize = ahd_linux_get_memsize();
 170                 mask_64bit = (bus_addr_t)0xFFFFFFFFFFFFFFFFULL;
 171                 mask_39bit = (bus_addr_t)0x7FFFFFFFFFULL;
 172                 if (memsize >= 0x8000000000ULL
 173                  && ahd_pci_set_dma_mask(pdev, mask_64bit) == 0) {
 174                         ahd->flags |= AHD_64BIT_ADDRESSING;
 175                         ahd->platform_data->hw_dma_mask = mask_64bit;
 176                 } else if (memsize > 0x80000000
 177                         && ahd_pci_set_dma_mask(pdev, mask_39bit) == 0) {
 178                         ahd->flags |= AHD_39BIT_ADDRESSING;
 179                         ahd->platform_data->hw_dma_mask = mask_39bit;
 180                 }
 181         } else {
 182                 ahd_pci_set_dma_mask(pdev, 0xFFFFFFFF);
 183                 ahd->platform_data->hw_dma_mask = 0xFFFFFFFF;
 184         }
 185 #endif
 186         ahd->dev_softc = pci;
 187         error = ahd_pci_config(ahd, entry);
 188         if (error != 0) {
 189                 ahd_free(ahd);
 190                 return (-error);
 191         }
 192 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 193         pci_set_drvdata(pdev, ahd);
 194         if (aic79xx_detect_complete) {
 195 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 196                 ahd_linux_register_host(ahd, &aic79xx_driver_template);
 197 #else
 198                 printf("aic79xx: ignoring PCI device found after "
 199                        "initialization\n");
 200                 return (-ENODEV);
 201 #endif
 202         }
 203 #endif
 204         return (0);
 205 }
 206
 207 int
 208 ahd_linux_pci_init(void)
 209 {
 210 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 211         return (pci_module_init(&aic79xx_pci_driver));
 212 #else
 213         struct pci_dev *pdev;
 214         u_int class;
 215         int found;
 216
 217         /* If we don't have a PCI bus, we can't find any adapters. */
 218         if (pci_present() == 0)
 219                 return (0);
 220
 221         found = 0;
 222         pdev = NULL;
 223         class = PCI_CLASS_STORAGE_SCSI << 8;
 224         while ((pdev = pci_find_class(class, pdev)) != NULL) {
 225                 ahd_dev_softc_t pci;
 226                 int error;
 227
 228                 pci = pdev;
 229                 error = ahd_linux_pci_dev_probe(pdev, /*pci_devid*/NULL);
 230                 if (error == 0)
 231                         found++;
 232         }
 233         return (found);
 234 #endif
 235 }
 236
 237 void
 238 ahd_linux_pci_exit(void)
 239 {
 240         pci_unregister_driver(&aic79xx_pci_driver);
 241 }
 242
 243 static int
 244 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
 245                                  u_long *base2)
 246 {
 247 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
 248         *base = pci_resource_start(ahd->dev_softc, 0);
 249         /*
 250          * This is really the 3rd bar and should be at index 2,
 251          * but the Linux PCI code doesn't know how to "count" 64bit
 252          * bars.
 253          */
 254         *base2 = pci_resource_start(ahd->dev_softc, 3);
 255 #else
 256         *base = ahd_pci_read_config(ahd->dev_softc, AHD_PCI_IOADDR0, 4);
 257         *base2 = ahd_pci_read_config(ahd->dev_softc, AHD_PCI_IOADDR1, 4);
 258         *base &= PCI_BASE_ADDRESS_IO_MASK;
 259         *base2 &= PCI_BASE_ADDRESS_IO_MASK;
 260 #endif
 261         if (*base == 0 || *base2 == 0)
 262                 return (ENOMEM);
 263 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
 264         if (check_region(*base, 256) != 0
 265          || check_region(*base2, 256) != 0)
 266                 return (ENOMEM);
 267         request_region(*base, 256, "aic79xx");
 268         request_region(*base2, 256, "aic79xx");
 269 #else
 270         if (request_region(*base, 256, "aic79xx") == 0)
 271                 return (ENOMEM);
 272         if (request_region(*base2, 256, "aic79xx") == 0) {
 273                 release_region(*base2, 256);
 274                 return (ENOMEM);
 275         }
 276 #endif
 277         return (0);
 278 }
 279
 280 static int
 281 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
 282                                  u_long *bus_addr,
 283                                  uint8_t **maddr)
 284 {
 285         u_long  start;
 286         u_long  base_page;
 287         u_long  base_offset;
 288         int     error;
 289
 290         if (aic79xx_allow_memio == 0)
 291                 return (ENOMEM);
 292
 293         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
 294                 return (ENOMEM);
 295
 296         error = 0;
 297 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
 298         start = pci_resource_start(ahd->dev_softc, 1);
 299         base_page = start & PAGE_MASK;
 300         base_offset = start - base_page;
 301 #else
 302         start = ahd_pci_read_config(ahd->dev_softc, PCIR_MAPS+4, 4);
 303         base_offset = start & PCI_BASE_ADDRESS_MEM_MASK;
 304         base_page = base_offset & PAGE_MASK;
 305         base_offset -= base_page;
 306 #endif
 307         if (start != 0) {
 308                 *bus_addr = start;
 309 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 310                 if (request_mem_region(start, 0x1000, "aic79xx") == 0)
 311                         error = ENOMEM;
 312 #endif
 313                 if (error == 0) {
 314                         *maddr = ioremap_nocache(base_page, base_offset + 256);
 315                         if (*maddr == NULL) {
 316                                 error = ENOMEM;
 317 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 318                                 release_mem_region(start, 0x1000);
 319 #endif
 320                         } else
 321                                 *maddr += base_offset;
 322                 }
 323         } else
 324                 error = ENOMEM;
 325         return (error);
 326 }
 327
 328 int
 329 ahd_pci_map_registers(struct ahd_softc *ahd)
 330 {
 331         uint32_t command;
 332         u_long   base;
 333         uint8_t *maddr;
 334         int      error;
 335
 336         /*
 337          * If its allowed, we prefer memory mapped access.
 338          */
 339         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
 340         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 341         base = 0;
 342         maddr = NULL;
 343         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
 344         if (error == 0) {
 345                 ahd->platform_data->mem_busaddr = base;
 346                 ahd->tags[0] = BUS_SPACE_MEMIO;
 347                 ahd->bshs[0].maddr = maddr;
 348                 ahd->tags[1] = BUS_SPACE_MEMIO;
 349                 ahd->bshs[1].maddr = maddr + 0x100;
 350                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 351                                      command | PCIM_CMD_MEMEN, 4);
 352
 353                 if (ahd_pci_test_register_access(ahd) != 0) {
 354
 355                         printf("aic79xx: PCI Device %d:%d:%d "
 356                                "failed memory mapped test.  Using PIO.\n",
 357                                ahd_get_pci_bus(ahd->dev_softc),
 358                                ahd_get_pci_slot(ahd->dev_softc),
 359                                ahd_get_pci_function(ahd->dev_softc));
 360                         iounmap((void *)((u_long)maddr & PAGE_MASK));
 361 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 362                         release_mem_region(ahd->platform_data->mem_busaddr,
 363                                            0x1000);
 364 #endif
 365                         ahd->bshs[0].maddr = NULL;
 366                         maddr = NULL;
 367                 } else
 368                         command |= PCIM_CMD_MEMEN;
 369         } else if (bootverbose) {
 370                 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
 371                        "unavailable. Cannot memory map device.\n",
 372                        ahd_get_pci_bus(ahd->dev_softc),
 373                        ahd_get_pci_slot(ahd->dev_softc),
 374                        ahd_get_pci_function(ahd->dev_softc),
 375                        base);
 376         }
 377
 378         if (maddr == NULL) {
 379                 u_long   base2;
 380
 381                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
 382                 if (error == 0) {
 383                         ahd->tags[0] = BUS_SPACE_PIO;
 384                         ahd->tags[1] = BUS_SPACE_PIO;
 385                         ahd->bshs[0].ioport = base;
 386                         ahd->bshs[1].ioport = base2;
 387                         command |= PCIM_CMD_PORTEN;
 388                 } else {
 389                         printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
 390                                "unavailable. Cannot map device.\n",
 391                                ahd_get_pci_bus(ahd->dev_softc),
 392                                ahd_get_pci_slot(ahd->dev_softc),
 393                                ahd_get_pci_function(ahd->dev_softc),
 394                                base, base2);
 395                 }
 396         }
 397         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
 398         return (error);
 399 }
 400
 401 int
 402 ahd_pci_map_int(struct ahd_softc *ahd)
 403 {
 404         int error;
 405
 406         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
 407                             SA_SHIRQ, "aic79xx", ahd);
 408         if (error == 0)
 409                 ahd->platform_data->irq = ahd->dev_softc->irq;
 410
 411         return (-error);
 412 }
 413
 414 void
 415 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
 416 {
 417 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 418         pci_set_power_state(ahd->dev_softc, new_state);
 419 #else
 420         uint32_t cap;
 421         u_int cap_offset;
 422
 423         /*
 424          * Traverse the capability list looking for
 425          * the power management capability.
 426          */
 427         cap = 0;
 428         cap_offset = ahd_pci_read_config(ahd->dev_softc,
 429                                          PCIR_CAP_PTR, /*bytes*/1);
 430         while (cap_offset != 0) {
 431
 432                 cap = ahd_pci_read_config(ahd->dev_softc,
 433                                           cap_offset, /*bytes*/4);
 434                 if ((cap & 0xFF) == 1
 435                  && ((cap >> 16) & 0x3) > 0) {
 436                         uint32_t pm_control;
 437
 438                         pm_control = ahd_pci_read_config(ahd->dev_softc,
 439                                                          cap_offset + 4,
 440                                                          /*bytes*/4);
 441                         pm_control &= ~0x3;
 442                         pm_control |= new_state;
 443                         ahd_pci_write_config(ahd->dev_softc,
 444                                              cap_offset + 4,
 445                                              pm_control, /*bytes*/2);
 446                         break;
 447                 }
 448                 cap_offset = (cap >> 8) & 0xFF;
 449         }
 450 #endif
 451 }