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 #include "aic79xx_pci.h"
  45
  46 /* Define the macro locally since it's different for different class of chips.
  47  */
  48 #define ID(x)            \
  49         ID2C(x),         \
  50         ID2C(IDIROC(x))
  51
  52 static const struct pci_device_id ahd_linux_pci_id_table[] = {
  53         /* aic7901 based controllers */
  54         ID(ID_AHA_29320A),
  55         ID(ID_AHA_29320ALP),
  56         ID(ID_AHA_29320LPE),
  57         /* aic7902 based controllers */
  58         ID(ID_AHA_29320),
  59         ID(ID_AHA_29320B),
  60         ID(ID_AHA_29320LP),
  61         ID(ID_AHA_39320),
  62         ID(ID_AHA_39320_B),
  63         ID(ID_AHA_39320A),
  64         ID(ID_AHA_39320D),
  65         ID(ID_AHA_39320D_HP),
  66         ID(ID_AHA_39320D_B),
  67         ID(ID_AHA_39320D_B_HP),
  68         /* Generic chip probes for devices we don't know exactly. */
  69         ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
  70         ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
  71         ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
  72         { 0 }
  73 };
  74
  75 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
  76
  77 static int __maybe_unused
  78 ahd_linux_pci_dev_suspend(struct device *dev)
  79 {
  80         struct ahd_softc *ahd = dev_get_drvdata(dev);
  81         int rc;
  82
  83         if ((rc = ahd_suspend(ahd)))
  84                 return rc;
  85
  86         ahd_pci_suspend(ahd);
  87
  88         return rc;
  89 }
  90
  91 static int __maybe_unused
  92 ahd_linux_pci_dev_resume(struct device *dev)
  93 {
  94         struct ahd_softc *ahd = dev_get_drvdata(dev);
  95
  96         ahd_pci_resume(ahd);
  97
  98         ahd_resume(ahd);
  99
 100         return 0;
 101 }
 102
 103 static void
 104 ahd_linux_pci_dev_remove(struct pci_dev *pdev)
 105 {
 106         struct ahd_softc *ahd = pci_get_drvdata(pdev);
 107         u_long s;
 108
 109         if (ahd->platform_data && ahd->platform_data->host)
 110                         scsi_remove_host(ahd->platform_data->host);
 111
 112         ahd_lock(ahd, &s);
 113         ahd_intr_enable(ahd, FALSE);
 114         ahd_unlock(ahd, &s);
 115         ahd_free(ahd);
 116 }
 117
 118 static void
 119 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
 120 {
 121         struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
 122         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
 123
 124         master_pdev = pci_get_slot(pdev->bus, master_devfn);
 125         if (master_pdev) {
 126                 struct ahd_softc *master = pci_get_drvdata(master_pdev);
 127                 if (master) {
 128                         ahd->flags &= ~AHD_BIOS_ENABLED;
 129                         ahd->flags |= master->flags & AHD_BIOS_ENABLED;
 130                 } else
 131                         printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
 132                 pci_dev_put(master_pdev);
 133         }
 134 }
 135
 136 static int
 137 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 138 {
 139         char             buf[80];
 140         struct           ahd_softc *ahd;
 141         ahd_dev_softc_t  pci;
 142         const struct ahd_pci_identity *entry;
 143         char            *name;
 144         int              error;
 145         struct device   *dev = &pdev->dev;
 146
 147         pci = pdev;
 148         entry = ahd_find_pci_device(pci);
 149         if (entry == NULL)
 150                 return (-ENODEV);
 151
 152         /*
 153          * Allocate a softc for this card and
 154          * set it up for attachment by our
 155          * common detect routine.
 156          */
 157         sprintf(buf, "ahd_pci:%d:%d:%d",
 158                 ahd_get_pci_bus(pci),
 159                 ahd_get_pci_slot(pci),
 160                 ahd_get_pci_function(pci));
 161         name = kstrdup(buf, GFP_ATOMIC);
 162         if (name == NULL)
 163                 return (-ENOMEM);
 164         ahd = ahd_alloc(NULL, name);
 165         if (ahd == NULL)
 166                 return (-ENOMEM);
 167         if (pci_enable_device(pdev)) {
 168                 ahd_free(ahd);
 169                 return (-ENODEV);
 170         }
 171         pci_set_master(pdev);
 172
 173         if (sizeof(dma_addr_t) > 4) {
 174                 const u64 required_mask = dma_get_required_mask(dev);
 175
 176                 if (required_mask > DMA_BIT_MASK(39) &&
 177                     dma_set_mask(dev, DMA_BIT_MASK(64)) == 0)
 178                         ahd->flags |= AHD_64BIT_ADDRESSING;
 179                 else if (required_mask > DMA_BIT_MASK(32) &&
 180                          dma_set_mask(dev, DMA_BIT_MASK(39)) == 0)
 181                         ahd->flags |= AHD_39BIT_ADDRESSING;
 182                 else
 183                         dma_set_mask(dev, DMA_BIT_MASK(32));
 184         } else {
 185                 dma_set_mask(dev, DMA_BIT_MASK(32));
 186         }
 187         ahd->dev_softc = pci;
 188         error = ahd_pci_config(ahd, entry);
 189         if (error != 0) {
 190                 ahd_free(ahd);
 191                 return (-error);
 192         }
 193
 194         /*
 195          * Second Function PCI devices need to inherit some
 196          * * settings from function 0.
 197          */
 198         if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
 199                 ahd_linux_pci_inherit_flags(ahd);
 200
 201         pci_set_drvdata(pdev, ahd);
 202
 203         ahd_linux_register_host(ahd, &aic79xx_driver_template);
 204         return (0);
 205 }
 206
 207 static SIMPLE_DEV_PM_OPS(ahd_linux_pci_dev_pm_ops,
 208                          ahd_linux_pci_dev_suspend,
 209                          ahd_linux_pci_dev_resume);
 210
 211 static struct pci_driver aic79xx_pci_driver = {
 212         .name           = "aic79xx",
 213         .probe          = ahd_linux_pci_dev_probe,
 214         .driver.pm      = &ahd_linux_pci_dev_pm_ops,
 215         .remove         = ahd_linux_pci_dev_remove,
 216         .id_table       = ahd_linux_pci_id_table
 217 };
 218
 219 int
 220 ahd_linux_pci_init(void)
 221 {
 222         return pci_register_driver(&aic79xx_pci_driver);
 223 }
 224
 225 void
 226 ahd_linux_pci_exit(void)
 227 {
 228         pci_unregister_driver(&aic79xx_pci_driver);
 229 }
 230
 231 static int
 232 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,
 233                                  resource_size_t *base2)
 234 {
 235         *base = pci_resource_start(ahd->dev_softc, 0);
 236         /*
 237          * This is really the 3rd bar and should be at index 2,
 238          * but the Linux PCI code doesn't know how to "count" 64bit
 239          * bars.
 240          */
 241         *base2 = pci_resource_start(ahd->dev_softc, 3);
 242         if (*base == 0 || *base2 == 0)
 243                 return (ENOMEM);
 244         if (!request_region(*base, 256, "aic79xx"))
 245                 return (ENOMEM);
 246         if (!request_region(*base2, 256, "aic79xx")) {
 247                 release_region(*base, 256);
 248                 return (ENOMEM);
 249         }
 250         return (0);
 251 }
 252
 253 static int
 254 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
 255                                  resource_size_t *bus_addr,
 256                                  uint8_t __iomem **maddr)
 257 {
 258         resource_size_t start;
 259         resource_size_t base_page;
 260         u_long  base_offset;
 261         int     error = 0;
 262
 263         if (aic79xx_allow_memio == 0)
 264                 return (ENOMEM);
 265
 266         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
 267                 return (ENOMEM);
 268
 269         start = pci_resource_start(ahd->dev_softc, 1);
 270         base_page = start & PAGE_MASK;
 271         base_offset = start - base_page;
 272         if (start != 0) {
 273                 *bus_addr = start;
 274                 if (!request_mem_region(start, 0x1000, "aic79xx"))
 275                         error = ENOMEM;
 276                 if (!error) {
 277                         *maddr = ioremap(base_page, base_offset + 512);
 278                         if (*maddr == NULL) {
 279                                 error = ENOMEM;
 280                                 release_mem_region(start, 0x1000);
 281                         } else
 282                                 *maddr += base_offset;
 283                 }
 284         } else
 285                 error = ENOMEM;
 286         return (error);
 287 }
 288
 289 int
 290 ahd_pci_map_registers(struct ahd_softc *ahd)
 291 {
 292         uint32_t command;
 293         resource_size_t base;
 294         uint8_t __iomem *maddr;
 295         int      error;
 296
 297         /*
 298          * If its allowed, we prefer memory mapped access.
 299          */
 300         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
 301         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 302         base = 0;
 303         maddr = NULL;
 304         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
 305         if (error == 0) {
 306                 ahd->platform_data->mem_busaddr = base;
 307                 ahd->tags[0] = BUS_SPACE_MEMIO;
 308                 ahd->bshs[0].maddr = maddr;
 309                 ahd->tags[1] = BUS_SPACE_MEMIO;
 310                 ahd->bshs[1].maddr = maddr + 0x100;
 311                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 312                                      command | PCIM_CMD_MEMEN, 4);
 313
 314                 if (ahd_pci_test_register_access(ahd) != 0) {
 315
 316                         printk("aic79xx: PCI Device %d:%d:%d "
 317                                "failed memory mapped test.  Using PIO.\n",
 318                                ahd_get_pci_bus(ahd->dev_softc),
 319                                ahd_get_pci_slot(ahd->dev_softc),
 320                                ahd_get_pci_function(ahd->dev_softc));
 321                         iounmap(maddr);
 322                         release_mem_region(ahd->platform_data->mem_busaddr,
 323                                            0x1000);
 324                         ahd->bshs[0].maddr = NULL;
 325                         maddr = NULL;
 326                 } else
 327                         command |= PCIM_CMD_MEMEN;
 328         } else if (bootverbose) {
 329                 printk("aic79xx: PCI%d:%d:%d MEM region 0x%llx "
 330                        "unavailable. Cannot memory map device.\n",
 331                        ahd_get_pci_bus(ahd->dev_softc),
 332                        ahd_get_pci_slot(ahd->dev_softc),
 333                        ahd_get_pci_function(ahd->dev_softc),
 334                        (unsigned long long)base);
 335         }
 336
 337         if (maddr == NULL) {
 338                 resource_size_t base2;
 339
 340                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
 341                 if (error == 0) {
 342                         ahd->tags[0] = BUS_SPACE_PIO;
 343                         ahd->tags[1] = BUS_SPACE_PIO;
 344                         ahd->bshs[0].ioport = (u_long)base;
 345                         ahd->bshs[1].ioport = (u_long)base2;
 346                         command |= PCIM_CMD_PORTEN;
 347                 } else {
 348                         printk("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "
 349                                "0x%llx unavailable. Cannot map device.\n",
 350                                ahd_get_pci_bus(ahd->dev_softc),
 351                                ahd_get_pci_slot(ahd->dev_softc),
 352                                ahd_get_pci_function(ahd->dev_softc),
 353                                (unsigned long long)base,
 354                                (unsigned long long)base2);
 355                 }
 356         }
 357         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
 358         return (error);
 359 }
 360
 361 int
 362 ahd_pci_map_int(struct ahd_softc *ahd)
 363 {
 364         int error;
 365
 366         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
 367                             IRQF_SHARED, "aic79xx", ahd);
 368         if (!error)
 369                 ahd->platform_data->irq = ahd->dev_softc->irq;
 370
 371         return (-error);
 372 }
 373
 374 void
 375 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
 376 {
 377         pci_set_power_state(ahd->dev_softc, new_state);
 378 }