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