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 static int __maybe_unused
 125 ahc_linux_pci_dev_suspend(struct device *dev)
 126 {
 127         struct ahc_softc *ahc = dev_get_drvdata(dev);
 128
 129         return ahc_suspend(ahc);
 130 }
 131
 132 static int __maybe_unused
 133 ahc_linux_pci_dev_resume(struct device *dev)
 134 {
 135         struct ahc_softc *ahc = dev_get_drvdata(dev);
 136
 137         ahc_pci_resume(ahc);
 138
 139         return (ahc_resume(ahc));
 140 }
 141
 142 static void
 143 ahc_linux_pci_dev_remove(struct pci_dev *pdev)
 144 {
 145         struct ahc_softc *ahc = pci_get_drvdata(pdev);
 146         u_long s;
 147
 148         if (ahc->platform_data && ahc->platform_data->host)
 149                         scsi_remove_host(ahc->platform_data->host);
 150
 151         ahc_lock(ahc, &s);
 152         ahc_intr_enable(ahc, FALSE);
 153         ahc_unlock(ahc, &s);
 154         ahc_free(ahc);
 155 }
 156
 157 static void
 158 ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)
 159 {
 160         struct pci_dev *pdev = ahc->dev_softc, *master_pdev;
 161         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
 162
 163         master_pdev = pci_get_slot(pdev->bus, master_devfn);
 164         if (master_pdev) {
 165                 struct ahc_softc *master = pci_get_drvdata(master_pdev);
 166                 if (master) {
 167                         ahc->flags &= ~AHC_BIOS_ENABLED;
 168                         ahc->flags |= master->flags & AHC_BIOS_ENABLED;
 169
 170                         ahc->flags &= ~AHC_PRIMARY_CHANNEL;
 171                         ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;
 172                 } else
 173                         printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");
 174                 pci_dev_put(master_pdev);
 175         }
 176 }
 177
 178 static int
 179 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 180 {
 181         char             buf[80];
 182         const uint64_t   mask_39bit = 0x7FFFFFFFFFULL;
 183         struct           ahc_softc *ahc;
 184         ahc_dev_softc_t  pci;
 185         const struct ahc_pci_identity *entry;
 186         char            *name;
 187         int              error;
 188         struct device   *dev = &pdev->dev;
 189
 190         pci = pdev;
 191         entry = ahc_find_pci_device(pci);
 192         if (entry == NULL)
 193                 return (-ENODEV);
 194
 195         /*
 196          * Allocate a softc for this card and
 197          * set it up for attachment by our
 198          * common detect routine.
 199          */
 200         sprintf(buf, "ahc_pci:%d:%d:%d",
 201                 ahc_get_pci_bus(pci),
 202                 ahc_get_pci_slot(pci),
 203                 ahc_get_pci_function(pci));
 204         name = kstrdup(buf, GFP_ATOMIC);
 205         if (name == NULL)
 206                 return (-ENOMEM);
 207         ahc = ahc_alloc(NULL, name);
 208         if (ahc == NULL)
 209                 return (-ENOMEM);
 210         if (pci_enable_device(pdev)) {
 211                 ahc_free(ahc);
 212                 return (-ENODEV);
 213         }
 214         pci_set_master(pdev);
 215
 216         if (sizeof(dma_addr_t) > 4
 217             && ahc->features & AHC_LARGE_SCBS
 218             && dma_set_mask(dev, mask_39bit) == 0
 219             && dma_get_required_mask(dev) > DMA_BIT_MASK(32)) {
 220                 ahc->flags |= AHC_39BIT_ADDRESSING;
 221         } else {
 222                 if (dma_set_mask(dev, DMA_BIT_MASK(32))) {
 223                         ahc_free(ahc);
 224                         printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
 225                         return (-ENODEV);
 226                 }
 227         }
 228         ahc->dev_softc = pci;
 229         ahc->dev = &pci->dev;
 230         error = ahc_pci_config(ahc, entry);
 231         if (error != 0) {
 232                 ahc_free(ahc);
 233                 return (-error);
 234         }
 235
 236         /*
 237          * Second Function PCI devices need to inherit some
 238          * settings from function 0.
 239          */
 240         if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
 241                 ahc_linux_pci_inherit_flags(ahc);
 242
 243         pci_set_drvdata(pdev, ahc);
 244         return ahc_linux_register_host(ahc, &aic7xxx_driver_template);
 245 }
 246
 247 /******************************* PCI Routines *********************************/
 248 uint32_t
 249 ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)
 250 {
 251         switch (width) {
 252         case 1:
 253         {
 254                 uint8_t retval;
 255
 256                 pci_read_config_byte(pci, reg, &retval);
 257                 return (retval);
 258         }
 259         case 2:
 260         {
 261                 uint16_t retval;
 262                 pci_read_config_word(pci, reg, &retval);
 263                 return (retval);
 264         }
 265         case 4:
 266         {
 267                 uint32_t retval;
 268                 pci_read_config_dword(pci, reg, &retval);
 269                 return (retval);
 270         }
 271         default:
 272                 panic("ahc_pci_read_config: Read size too big");
 273                 /* NOTREACHED */
 274                 return (0);
 275         }
 276 }
 277
 278 void
 279 ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)
 280 {
 281         switch (width) {
 282         case 1:
 283                 pci_write_config_byte(pci, reg, value);
 284                 break;
 285         case 2:
 286                 pci_write_config_word(pci, reg, value);
 287                 break;
 288         case 4:
 289                 pci_write_config_dword(pci, reg, value);
 290                 break;
 291         default:
 292                 panic("ahc_pci_write_config: Write size too big");
 293                 /* NOTREACHED */
 294         }
 295 }
 296
 297 static SIMPLE_DEV_PM_OPS(ahc_linux_pci_dev_pm_ops,
 298                          ahc_linux_pci_dev_suspend,
 299                          ahc_linux_pci_dev_resume);
 300
 301 static struct pci_driver aic7xxx_pci_driver = {
 302         .name           = "aic7xxx",
 303         .probe          = ahc_linux_pci_dev_probe,
 304         .driver.pm      = &ahc_linux_pci_dev_pm_ops,
 305         .remove         = ahc_linux_pci_dev_remove,
 306         .id_table       = ahc_linux_pci_id_table
 307 };
 308
 309 int
 310 ahc_linux_pci_init(void)
 311 {
 312         return pci_register_driver(&aic7xxx_pci_driver);
 313 }
 314
 315 void
 316 ahc_linux_pci_exit(void)
 317 {
 318         pci_unregister_driver(&aic7xxx_pci_driver);
 319 }
 320
 321 static int
 322 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base)
 323 {
 324         if (aic7xxx_allow_memio == 0)
 325                 return (ENOMEM);
 326
 327         *base = pci_resource_start(ahc->dev_softc, 0);
 328         if (*base == 0)
 329                 return (ENOMEM);
 330         if (!request_region(*base, 256, "aic7xxx"))
 331                 return (ENOMEM);
 332         return (0);
 333 }
 334
 335 static int
 336 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
 337                                  resource_size_t *bus_addr,
 338                                  uint8_t __iomem **maddr)
 339 {
 340         resource_size_t start;
 341         int     error;
 342
 343         error = 0;
 344         start = pci_resource_start(ahc->dev_softc, 1);
 345         if (start != 0) {
 346                 *bus_addr = start;
 347                 if (!request_mem_region(start, 0x1000, "aic7xxx"))
 348                         error = ENOMEM;
 349                 if (error == 0) {
 350                         *maddr = ioremap(start, 256);
 351                         if (*maddr == NULL) {
 352                                 error = ENOMEM;
 353                                 release_mem_region(start, 0x1000);
 354                         }
 355                 }
 356         } else
 357                 error = ENOMEM;
 358         return (error);
 359 }
 360
 361 int
 362 ahc_pci_map_registers(struct ahc_softc *ahc)
 363 {
 364         uint32_t command;
 365         resource_size_t base;
 366         uint8_t __iomem *maddr;
 367         int      error;
 368
 369         /*
 370          * If its allowed, we prefer memory mapped access.
 371          */
 372         command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
 373         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 374         base = 0;
 375         maddr = NULL;
 376         error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
 377         if (error == 0) {
 378                 ahc->platform_data->mem_busaddr = base;
 379                 ahc->tag = BUS_SPACE_MEMIO;
 380                 ahc->bsh.maddr = maddr;
 381                 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
 382                                      command | PCIM_CMD_MEMEN, 4);
 383
 384                 /*
 385                  * Do a quick test to see if memory mapped
 386                  * I/O is functioning correctly.
 387                  */
 388                 if (ahc_pci_test_register_access(ahc) != 0) {
 389
 390                         printk("aic7xxx: PCI Device %d:%d:%d "
 391                                "failed memory mapped test.  Using PIO.\n",
 392                                ahc_get_pci_bus(ahc->dev_softc),
 393                                ahc_get_pci_slot(ahc->dev_softc),
 394                                ahc_get_pci_function(ahc->dev_softc));
 395                         iounmap(maddr);
 396                         release_mem_region(ahc->platform_data->mem_busaddr,
 397                                            0x1000);
 398                         ahc->bsh.maddr = NULL;
 399                         maddr = NULL;
 400                 } else
 401                         command |= PCIM_CMD_MEMEN;
 402         } else {
 403                 printk("aic7xxx: PCI%d:%d:%d MEM region 0x%llx "
 404                        "unavailable. Cannot memory map device.\n",
 405                        ahc_get_pci_bus(ahc->dev_softc),
 406                        ahc_get_pci_slot(ahc->dev_softc),
 407                        ahc_get_pci_function(ahc->dev_softc),
 408                        (unsigned long long)base);
 409         }
 410
 411         /*
 412          * We always prefer memory mapped access.
 413          */
 414         if (maddr == NULL) {
 415
 416                 error = ahc_linux_pci_reserve_io_region(ahc, &base);
 417                 if (error == 0) {
 418                         ahc->tag = BUS_SPACE_PIO;
 419                         ahc->bsh.ioport = (u_long)base;
 420                         command |= PCIM_CMD_PORTEN;
 421                 } else {
 422                         printk("aic7xxx: PCI%d:%d:%d IO region 0x%llx[0..255] "
 423                                "unavailable. Cannot map device.\n",
 424                                ahc_get_pci_bus(ahc->dev_softc),
 425                                ahc_get_pci_slot(ahc->dev_softc),
 426                                ahc_get_pci_function(ahc->dev_softc),
 427                                (unsigned long long)base);
 428                 }
 429         }
 430         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
 431         return (error);
 432 }
 433
 434 int
 435 ahc_pci_map_int(struct ahc_softc *ahc)
 436 {
 437         int error;
 438
 439         error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
 440                             IRQF_SHARED, "aic7xxx", ahc);
 441         if (error == 0)
 442                 ahc->platform_data->irq = ahc->dev_softc->irq;
 443
 444         return (-error);
 445 }
 446