kernel/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c

   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 /* Define the macro locally since it's different for different class of chips.
  46 */
  47 #define ID(x)   ID_C(x, PCI_CLASS_STORAGE_SCSI)
  48
  49 static const struct pci_device_id ahc_linux_pci_id_table[] = {
  50         /* aic7850 based controllers */
  51         ID(ID_AHA_2902_04_10_15_20C_30C),
  52         /* aic7860 based controllers */
  53         ID(ID_AHA_2930CU),
  54         ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK),
  55         ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK),
  56         ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK),
  57         ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK),
  58         /* aic7870 based controllers */
  59         ID(ID_AHA_2940),
  60         ID(ID_AHA_3940),
  61         ID(ID_AHA_398X),
  62         ID(ID_AHA_2944),
  63         ID(ID_AHA_3944),
  64         ID(ID_AHA_4944),
  65         /* aic7880 based controllers */
  66         ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK),
  67         ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK),
  68         ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK),
  69         ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK),
  70         ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK),
  71         ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK),
  72         ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK),
  73         ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK),
  74         ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK),
  75         /* aic7890 based controllers */
  76         ID(ID_AHA_2930U2),
  77         ID(ID_AHA_2940U2B),
  78         ID(ID_AHA_2940U2_OEM),
  79         ID(ID_AHA_2940U2),
  80         ID(ID_AHA_2950U2B),
  81         ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK),
  82         ID(ID_AAA_131U2),
  83         /* aic7890 based controllers */
  84         ID(ID_AHA_29160),
  85         ID(ID_AHA_29160_CPQ),
  86         ID(ID_AHA_29160N),
  87         ID(ID_AHA_29160C),
  88         ID(ID_AHA_29160B),
  89         ID(ID_AHA_19160B),
  90         ID(ID_AIC7892_ARO),
  91         /* aic7892 based controllers */
  92         ID(ID_AHA_2940U_DUAL),
  93         ID(ID_AHA_3940AU),
  94         ID(ID_AHA_3944AU),
  95         ID(ID_AIC7895_ARO),
  96         ID(ID_AHA_3950U2B_0),
  97         ID(ID_AHA_3950U2B_1),
  98         ID(ID_AHA_3950U2D_0),
  99         ID(ID_AHA_3950U2D_1),
 100         ID(ID_AIC7896_ARO),
 101         /* aic7899 based controllers */
 102         ID(ID_AHA_3960D),
 103         ID(ID_AHA_3960D_CPQ),
 104         ID(ID_AIC7899_ARO),
 105         /* Generic chip probes for devices we don't know exactly. */
 106         ID(ID_AIC7850 & ID_DEV_VENDOR_MASK),
 107         ID(ID_AIC7855 & ID_DEV_VENDOR_MASK),
 108         ID(ID_AIC7859 & ID_DEV_VENDOR_MASK),
 109         ID(ID_AIC7860 & ID_DEV_VENDOR_MASK),
 110         ID(ID_AIC7870 & ID_DEV_VENDOR_MASK),
 111         ID(ID_AIC7880 & ID_DEV_VENDOR_MASK),
 112         ID16(ID_AIC7890 & ID_9005_GENERIC_MASK),
 113         ID16(ID_AIC7892 & ID_9005_GENERIC_MASK),
 114         ID(ID_AIC7895 & ID_DEV_VENDOR_MASK),
 115         ID16(ID_AIC7896 & ID_9005_GENERIC_MASK),
 116         ID16(ID_AIC7899 & ID_9005_GENERIC_MASK),
 117         ID(ID_AIC7810 & ID_DEV_VENDOR_MASK),
 118         ID(ID_AIC7815 & ID_DEV_VENDOR_MASK),
 119         { 0 }
 120 };
 121
 122 MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
 123
 124 #ifdef CONFIG_PM
 125 static int
 126 ahc_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
 127 {
 128         struct ahc_softc *ahc = pci_get_drvdata(pdev);
 129         int rc;
 130
 131         if ((rc = ahc_suspend(ahc)))
 132                 return rc;
 133
 134         pci_save_state(pdev);
 135         pci_disable_device(pdev);
 136
 137         if (mesg.event & PM_EVENT_SLEEP)
 138                 pci_set_power_state(pdev, PCI_D3hot);
 139
 140         return rc;
 141 }
 142
 143 static int
 144 ahc_linux_pci_dev_resume(struct pci_dev *pdev)
 145 {
 146         struct ahc_softc *ahc = pci_get_drvdata(pdev);
 147         int rc;
 148
 149         pci_set_power_state(pdev, PCI_D0);
 150         pci_restore_state(pdev);
 151
 152         if ((rc = pci_enable_device(pdev))) {
 153                 dev_printk(KERN_ERR, &pdev->dev,
 154                            "failed to enable device after resume (%d)\n", rc);
 155                 return rc;
 156         }
 157
 158         pci_set_master(pdev);
 159
 160         ahc_pci_resume(ahc);
 161
 162         return (ahc_resume(ahc));
 163 }
 164 #endif
 165
 166 static void
 167 ahc_linux_pci_dev_remove(struct pci_dev *pdev)
 168 {
 169         struct ahc_softc *ahc = pci_get_drvdata(pdev);
 170         u_long s;
 171
 172         if (ahc->platform_data && ahc->platform_data->host)
 173                         scsi_remove_host(ahc->platform_data->host);
 174
 175         ahc_lock(ahc, &s);
 176         ahc_intr_enable(ahc, FALSE);
 177         ahc_unlock(ahc, &s);
 178         ahc_free(ahc);
 179 }
 180
 181 static void
 182 ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)
 183 {
 184         struct pci_dev *pdev = ahc->dev_softc, *master_pdev;
 185         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
 186
 187         master_pdev = pci_get_slot(pdev->bus, master_devfn);
 188         if (master_pdev) {
 189                 struct ahc_softc *master = pci_get_drvdata(master_pdev);
 190                 if (master) {
 191                         ahc->flags &= ~AHC_BIOS_ENABLED;
 192                         ahc->flags |= master->flags & AHC_BIOS_ENABLED;
 193
 194                         ahc->flags &= ~AHC_PRIMARY_CHANNEL;
 195                         ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;
 196                 } else
 197                         printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");
 198                 pci_dev_put(master_pdev);
 199         }
 200 }
 201
 202 static int
 203 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 204 {
 205         char             buf[80];
 206         const uint64_t   mask_39bit = 0x7FFFFFFFFFULL;
 207         struct           ahc_softc *ahc;
 208         ahc_dev_softc_t  pci;
 209         const struct ahc_pci_identity *entry;
 210         char            *name;
 211         int              error;
 212         struct device   *dev = &pdev->dev;
 213
 214         pci = pdev;
 215         entry = ahc_find_pci_device(pci);
 216         if (entry == NULL)
 217                 return (-ENODEV);
 218
 219         /*
 220          * Allocate a softc for this card and
 221          * set it up for attachment by our
 222          * common detect routine.
 223          */
 224         sprintf(buf, "ahc_pci:%d:%d:%d",
 225                 ahc_get_pci_bus(pci),
 226                 ahc_get_pci_slot(pci),
 227                 ahc_get_pci_function(pci));
 228         name = kstrdup(buf, GFP_ATOMIC);
 229         if (name == NULL)
 230                 return (-ENOMEM);
 231         ahc = ahc_alloc(NULL, name);
 232         if (ahc == NULL)
 233                 return (-ENOMEM);
 234         if (pci_enable_device(pdev)) {
 235                 ahc_free(ahc);
 236                 return (-ENODEV);
 237         }
 238         pci_set_master(pdev);
 239
 240         if (sizeof(dma_addr_t) > 4
 241             && ahc->features & AHC_LARGE_SCBS
 242             && dma_set_mask(dev, mask_39bit) == 0
 243             && dma_get_required_mask(dev) > DMA_BIT_MASK(32)) {
 244                 ahc->flags |= AHC_39BIT_ADDRESSING;
 245         } else {
 246                 if (dma_set_mask(dev, DMA_BIT_MASK(32))) {
 247                         ahc_free(ahc);
 248                         printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
 249                         return (-ENODEV);
 250                 }
 251         }
 252         ahc->dev_softc = pci;
 253         error = ahc_pci_config(ahc, entry);
 254         if (error != 0) {
 255                 ahc_free(ahc);
 256                 return (-error);
 257         }
 258
 259         /*
 260          * Second Function PCI devices need to inherit some
 261          * settings from function 0.
 262          */
 263         if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
 264                 ahc_linux_pci_inherit_flags(ahc);
 265
 266         pci_set_drvdata(pdev, ahc);
 267         ahc_linux_register_host(ahc, &aic7xxx_driver_template);
 268         return (0);
 269 }
 270
 271 /******************************* PCI Routines *********************************/
 272 uint32_t
 273 ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)
 274 {
 275         switch (width) {
 276         case 1:
 277         {
 278                 uint8_t retval;
 279
 280                 pci_read_config_byte(pci, reg, &retval);
 281                 return (retval);
 282         }
 283         case 2:
 284         {
 285                 uint16_t retval;
 286                 pci_read_config_word(pci, reg, &retval);
 287                 return (retval);
 288         }
 289         case 4:
 290         {
 291                 uint32_t retval;
 292                 pci_read_config_dword(pci, reg, &retval);
 293                 return (retval);
 294         }
 295         default:
 296                 panic("ahc_pci_read_config: Read size too big");
 297                 /* NOTREACHED */
 298                 return (0);
 299         }
 300 }
 301
 302 void
 303 ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)
 304 {
 305         switch (width) {
 306         case 1:
 307                 pci_write_config_byte(pci, reg, value);
 308                 break;
 309         case 2:
 310                 pci_write_config_word(pci, reg, value);
 311                 break;
 312         case 4:
 313                 pci_write_config_dword(pci, reg, value);
 314                 break;
 315         default:
 316                 panic("ahc_pci_write_config: Write size too big");
 317                 /* NOTREACHED */
 318         }
 319 }
 320
 321
 322 static struct pci_driver aic7xxx_pci_driver = {
 323         .name           = "aic7xxx",
 324         .probe          = ahc_linux_pci_dev_probe,
 325 #ifdef CONFIG_PM
 326         .suspend        = ahc_linux_pci_dev_suspend,
 327         .resume         = ahc_linux_pci_dev_resume,
 328 #endif
 329         .remove         = ahc_linux_pci_dev_remove,
 330         .id_table       = ahc_linux_pci_id_table
 331 };
 332
 333 int
 334 ahc_linux_pci_init(void)
 335 {
 336         return pci_register_driver(&aic7xxx_pci_driver);
 337 }
 338
 339 void
 340 ahc_linux_pci_exit(void)
 341 {
 342         pci_unregister_driver(&aic7xxx_pci_driver);
 343 }
 344
 345 static int
 346 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base)
 347 {
 348         if (aic7xxx_allow_memio == 0)
 349                 return (ENOMEM);
 350
 351         *base = pci_resource_start(ahc->dev_softc, 0);
 352         if (*base == 0)
 353                 return (ENOMEM);
 354         if (!request_region(*base, 256, "aic7xxx"))
 355                 return (ENOMEM);
 356         return (0);
 357 }
 358
 359 static int
 360 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
 361                                  resource_size_t *bus_addr,
 362                                  uint8_t __iomem **maddr)
 363 {
 364         resource_size_t start;
 365         int     error;
 366
 367         error = 0;
 368         start = pci_resource_start(ahc->dev_softc, 1);
 369         if (start != 0) {
 370                 *bus_addr = start;
 371                 if (!request_mem_region(start, 0x1000, "aic7xxx"))
 372                         error = ENOMEM;
 373                 if (error == 0) {
 374                         *maddr = ioremap_nocache(start, 256);
 375                         if (*maddr == NULL) {
 376                                 error = ENOMEM;
 377                                 release_mem_region(start, 0x1000);
 378                         }
 379                 }
 380         } else
 381                 error = ENOMEM;
 382         return (error);
 383 }
 384
 385 int
 386 ahc_pci_map_registers(struct ahc_softc *ahc)
 387 {
 388         uint32_t command;
 389         resource_size_t base;
 390         uint8_t __iomem *maddr;
 391         int      error;
 392
 393         /*
 394          * If its allowed, we prefer memory mapped access.
 395          */
 396         command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
 397         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 398         base = 0;
 399         maddr = NULL;
 400         error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
 401         if (error == 0) {
 402                 ahc->platform_data->mem_busaddr = base;
 403                 ahc->tag = BUS_SPACE_MEMIO;
 404                 ahc->bsh.maddr = maddr;
 405                 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
 406                                      command | PCIM_CMD_MEMEN, 4);
 407
 408                 /*
 409                  * Do a quick test to see if memory mapped
 410                  * I/O is functioning correctly.
 411                  */
 412                 if (ahc_pci_test_register_access(ahc) != 0) {
 413
 414                         printk("aic7xxx: PCI Device %d:%d:%d "
 415                                "failed memory mapped test.  Using PIO.\n",
 416                                ahc_get_pci_bus(ahc->dev_softc),
 417                                ahc_get_pci_slot(ahc->dev_softc),
 418                                ahc_get_pci_function(ahc->dev_softc));
 419                         iounmap(maddr);
 420                         release_mem_region(ahc->platform_data->mem_busaddr,
 421                                            0x1000);
 422                         ahc->bsh.maddr = NULL;
 423                         maddr = NULL;
 424                 } else
 425                         command |= PCIM_CMD_MEMEN;
 426         } else {
 427                 printk("aic7xxx: PCI%d:%d:%d MEM region 0x%llx "
 428                        "unavailable. Cannot memory map device.\n",
 429                        ahc_get_pci_bus(ahc->dev_softc),
 430                        ahc_get_pci_slot(ahc->dev_softc),
 431                        ahc_get_pci_function(ahc->dev_softc),
 432                        (unsigned long long)base);
 433         }
 434
 435         /*
 436          * We always prefer memory mapped access.
 437          */
 438         if (maddr == NULL) {
 439
 440                 error = ahc_linux_pci_reserve_io_region(ahc, &base);
 441                 if (error == 0) {
 442                         ahc->tag = BUS_SPACE_PIO;
 443                         ahc->bsh.ioport = (u_long)base;
 444                         command |= PCIM_CMD_PORTEN;
 445                 } else {
 446                         printk("aic7xxx: PCI%d:%d:%d IO region 0x%llx[0..255] "
 447                                "unavailable. Cannot map device.\n",
 448                                ahc_get_pci_bus(ahc->dev_softc),
 449                                ahc_get_pci_slot(ahc->dev_softc),
 450                                ahc_get_pci_function(ahc->dev_softc),
 451                                (unsigned long long)base);
 452                 }
 453         }
 454         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
 455         return (error);
 456 }
 457
 458 int
 459 ahc_pci_map_int(struct ahc_softc *ahc)
 460 {
 461         int error;
 462
 463         error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
 464                             IRQF_SHARED, "aic7xxx", ahc);
 465         if (error == 0)
 466                 ahc->platform_data->irq = ahc->dev_softc->irq;
 467
 468         return (-error);
 469 }
 470