kernel/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 #ifdef CONFIG_PM
  78 static int
  79 ahd_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
  80 {
  81         struct ahd_softc *ahd = pci_get_drvdata(pdev);
  82         int rc;
  83
  84         if ((rc = ahd_suspend(ahd)))
  85                 return rc;
  86
  87         ahd_pci_suspend(ahd);
  88
  89         pci_save_state(pdev);
  90         pci_disable_device(pdev);
  91
  92         if (mesg.event & PM_EVENT_SLEEP)
  93                 pci_set_power_state(pdev, PCI_D3hot);
  94
  95         return rc;
  96 }
  97
  98 static int
  99 ahd_linux_pci_dev_resume(struct pci_dev *pdev)
 100 {
 101         struct ahd_softc *ahd = pci_get_drvdata(pdev);
 102         int rc;
 103
 104         pci_set_power_state(pdev, PCI_D0);
 105         pci_restore_state(pdev);
 106
 107         if ((rc = pci_enable_device(pdev))) {
 108                 dev_printk(KERN_ERR, &pdev->dev,
 109                            "failed to enable device after resume (%d)\n", rc);
 110                 return rc;
 111         }
 112
 113         pci_set_master(pdev);
 114
 115         ahd_pci_resume(ahd);
 116
 117         ahd_resume(ahd);
 118
 119         return rc;
 120 }
 121 #endif
 122
 123 static void
 124 ahd_linux_pci_dev_remove(struct pci_dev *pdev)
 125 {
 126         struct ahd_softc *ahd = pci_get_drvdata(pdev);
 127         u_long s;
 128
 129         if (ahd->platform_data && ahd->platform_data->host)
 130                         scsi_remove_host(ahd->platform_data->host);
 131
 132         ahd_lock(ahd, &s);
 133         ahd_intr_enable(ahd, FALSE);
 134         ahd_unlock(ahd, &s);
 135         ahd_free(ahd);
 136 }
 137
 138 static void
 139 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
 140 {
 141         struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
 142         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
 143
 144         master_pdev = pci_get_slot(pdev->bus, master_devfn);
 145         if (master_pdev) {
 146                 struct ahd_softc *master = pci_get_drvdata(master_pdev);
 147                 if (master) {
 148                         ahd->flags &= ~AHD_BIOS_ENABLED;
 149                         ahd->flags |= master->flags & AHD_BIOS_ENABLED;
 150                 } else
 151                         printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
 152                 pci_dev_put(master_pdev);
 153         }
 154 }
 155
 156 static int
 157 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 158 {
 159         char             buf[80];
 160         struct           ahd_softc *ahd;
 161         ahd_dev_softc_t  pci;
 162         const struct ahd_pci_identity *entry;
 163         char            *name;
 164         int              error;
 165         struct device   *dev = &pdev->dev;
 166
 167         pci = pdev;
 168         entry = ahd_find_pci_device(pci);
 169         if (entry == NULL)
 170                 return (-ENODEV);
 171
 172         /*
 173          * Allocate a softc for this card and
 174          * set it up for attachment by our
 175          * common detect routine.
 176          */
 177         sprintf(buf, "ahd_pci:%d:%d:%d",
 178                 ahd_get_pci_bus(pci),
 179                 ahd_get_pci_slot(pci),
 180                 ahd_get_pci_function(pci));
 181         name = kstrdup(buf, GFP_ATOMIC);
 182         if (name == NULL)
 183                 return (-ENOMEM);
 184         ahd = ahd_alloc(NULL, name);
 185         if (ahd == NULL)
 186                 return (-ENOMEM);
 187         if (pci_enable_device(pdev)) {
 188                 ahd_free(ahd);
 189                 return (-ENODEV);
 190         }
 191         pci_set_master(pdev);
 192
 193         if (sizeof(dma_addr_t) > 4) {
 194                 const u64 required_mask = dma_get_required_mask(dev);
 195
 196                 if (required_mask > DMA_BIT_MASK(39) &&
 197                     dma_set_mask(dev, DMA_BIT_MASK(64)) == 0)
 198                         ahd->flags |= AHD_64BIT_ADDRESSING;
 199                 else if (required_mask > DMA_BIT_MASK(32) &&
 200                          dma_set_mask(dev, DMA_BIT_MASK(39)) == 0)
 201                         ahd->flags |= AHD_39BIT_ADDRESSING;
 202                 else
 203                         dma_set_mask(dev, DMA_BIT_MASK(32));
 204         } else {
 205                 dma_set_mask(dev, DMA_BIT_MASK(32));
 206         }
 207         ahd->dev_softc = pci;
 208         error = ahd_pci_config(ahd, entry);
 209         if (error != 0) {
 210                 ahd_free(ahd);
 211                 return (-error);
 212         }
 213
 214         /*
 215          * Second Function PCI devices need to inherit some
 216          * * settings from function 0.
 217          */
 218         if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
 219                 ahd_linux_pci_inherit_flags(ahd);
 220
 221         pci_set_drvdata(pdev, ahd);
 222
 223         ahd_linux_register_host(ahd, &aic79xx_driver_template);
 224         return (0);
 225 }
 226
 227 static struct pci_driver aic79xx_pci_driver = {
 228         .name           = "aic79xx",
 229         .probe          = ahd_linux_pci_dev_probe,
 230 #ifdef CONFIG_PM
 231         .suspend        = ahd_linux_pci_dev_suspend,
 232         .resume         = ahd_linux_pci_dev_resume,
 233 #endif
 234         .remove         = ahd_linux_pci_dev_remove,
 235         .id_table       = ahd_linux_pci_id_table
 236 };
 237
 238 int
 239 ahd_linux_pci_init(void)
 240 {
 241         return pci_register_driver(&aic79xx_pci_driver);
 242 }
 243
 244 void
 245 ahd_linux_pci_exit(void)
 246 {
 247         pci_unregister_driver(&aic79xx_pci_driver);
 248 }
 249
 250 static int
 251 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,
 252                                  resource_size_t *base2)
 253 {
 254         *base = pci_resource_start(ahd->dev_softc, 0);
 255         /*
 256          * This is really the 3rd bar and should be at index 2,
 257          * but the Linux PCI code doesn't know how to "count" 64bit
 258          * bars.
 259          */
 260         *base2 = pci_resource_start(ahd->dev_softc, 3);
 261         if (*base == 0 || *base2 == 0)
 262                 return (ENOMEM);
 263         if (!request_region(*base, 256, "aic79xx"))
 264                 return (ENOMEM);
 265         if (!request_region(*base2, 256, "aic79xx")) {
 266                 release_region(*base, 256);
 267                 return (ENOMEM);
 268         }
 269         return (0);
 270 }
 271
 272 static int
 273 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
 274                                  resource_size_t *bus_addr,
 275                                  uint8_t __iomem **maddr)
 276 {
 277         resource_size_t start;
 278         resource_size_t base_page;
 279         u_long  base_offset;
 280         int     error = 0;
 281
 282         if (aic79xx_allow_memio == 0)
 283                 return (ENOMEM);
 284
 285         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
 286                 return (ENOMEM);
 287
 288         start = pci_resource_start(ahd->dev_softc, 1);
 289         base_page = start & PAGE_MASK;
 290         base_offset = start - base_page;
 291         if (start != 0) {
 292                 *bus_addr = start;
 293                 if (!request_mem_region(start, 0x1000, "aic79xx"))
 294                         error = ENOMEM;
 295                 if (!error) {
 296                         *maddr = ioremap_nocache(base_page, base_offset + 512);
 297                         if (*maddr == NULL) {
 298                                 error = ENOMEM;
 299                                 release_mem_region(start, 0x1000);
 300                         } else
 301                                 *maddr += base_offset;
 302                 }
 303         } else
 304                 error = ENOMEM;
 305         return (error);
 306 }
 307
 308 int
 309 ahd_pci_map_registers(struct ahd_softc *ahd)
 310 {
 311         uint32_t command;
 312         resource_size_t base;
 313         uint8_t __iomem *maddr;
 314         int      error;
 315
 316         /*
 317          * If its allowed, we prefer memory mapped access.
 318          */
 319         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
 320         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 321         base = 0;
 322         maddr = NULL;
 323         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
 324         if (error == 0) {
 325                 ahd->platform_data->mem_busaddr = base;
 326                 ahd->tags[0] = BUS_SPACE_MEMIO;
 327                 ahd->bshs[0].maddr = maddr;
 328                 ahd->tags[1] = BUS_SPACE_MEMIO;
 329                 ahd->bshs[1].maddr = maddr + 0x100;
 330                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 331                                      command | PCIM_CMD_MEMEN, 4);
 332
 333                 if (ahd_pci_test_register_access(ahd) != 0) {
 334
 335                         printk("aic79xx: PCI Device %d:%d:%d "
 336                                "failed memory mapped test.  Using PIO.\n",
 337                                ahd_get_pci_bus(ahd->dev_softc),
 338                                ahd_get_pci_slot(ahd->dev_softc),
 339                                ahd_get_pci_function(ahd->dev_softc));
 340                         iounmap(maddr);
 341                         release_mem_region(ahd->platform_data->mem_busaddr,
 342                                            0x1000);
 343                         ahd->bshs[0].maddr = NULL;
 344                         maddr = NULL;
 345                 } else
 346                         command |= PCIM_CMD_MEMEN;
 347         } else if (bootverbose) {
 348                 printk("aic79xx: PCI%d:%d:%d MEM region 0x%llx "
 349                        "unavailable. Cannot memory 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         }
 355
 356         if (maddr == NULL) {
 357                 resource_size_t base2;
 358
 359                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
 360                 if (error == 0) {
 361                         ahd->tags[0] = BUS_SPACE_PIO;
 362                         ahd->tags[1] = BUS_SPACE_PIO;
 363                         ahd->bshs[0].ioport = (u_long)base;
 364                         ahd->bshs[1].ioport = (u_long)base2;
 365                         command |= PCIM_CMD_PORTEN;
 366                 } else {
 367                         printk("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "
 368                                "0x%llx unavailable. Cannot map device.\n",
 369                                ahd_get_pci_bus(ahd->dev_softc),
 370                                ahd_get_pci_slot(ahd->dev_softc),
 371                                ahd_get_pci_function(ahd->dev_softc),
 372                                (unsigned long long)base,
 373                                (unsigned long long)base2);
 374                 }
 375         }
 376         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
 377         return (error);
 378 }
 379
 380 int
 381 ahd_pci_map_int(struct ahd_softc *ahd)
 382 {
 383         int error;
 384
 385         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
 386                             IRQF_SHARED, "aic79xx", ahd);
 387         if (!error)
 388                 ahd->platform_data->irq = ahd->dev_softc->irq;
 389
 390         return (-error);
 391 }
 392
 393 void
 394 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
 395 {
 396         pci_set_power_state(ahd->dev_softc, new_state);
 397 }