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 static int      ahd_linux_pci_dev_probe(struct pci_dev *pdev,
  47                                         const struct pci_device_id *ent);
  48 static int      ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd,
  49                                                  u_long *base, u_long *base2);
  50 static int      ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
  51                                                  u_long *bus_addr,
  52                                                  uint8_t __iomem **maddr);
  53 static int      ahd_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg);
  54 static int      ahd_linux_pci_dev_resume(struct pci_dev *pdev);
  55 static void     ahd_linux_pci_dev_remove(struct pci_dev *pdev);
  56
  57 /* Define the macro locally since it's different for different class of chips.
  58  */
  59 #define ID(x)            \
  60         ID2C(x),         \
  61         ID2C(IDIROC(x))
  62
  63 static struct pci_device_id ahd_linux_pci_id_table[] = {
  64         /* aic7901 based controllers */
  65         ID(ID_AHA_29320A),
  66         ID(ID_AHA_29320ALP),
  67         ID(ID_AHA_29320LPE),
  68         /* aic7902 based controllers */
  69         ID(ID_AHA_29320),
  70         ID(ID_AHA_29320B),
  71         ID(ID_AHA_29320LP),
  72         ID(ID_AHA_39320),
  73         ID(ID_AHA_39320_B),
  74         ID(ID_AHA_39320A),
  75         ID(ID_AHA_39320D),
  76         ID(ID_AHA_39320D_HP),
  77         ID(ID_AHA_39320D_B),
  78         ID(ID_AHA_39320D_B_HP),
  79         /* Generic chip probes for devices we don't know exactly. */
  80         ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
  81         ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
  82         ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
  83         { 0 }
  84 };
  85
  86 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
  87
  88 static struct pci_driver aic79xx_pci_driver = {
  89         .name           = "aic79xx",
  90         .probe          = ahd_linux_pci_dev_probe,
  91 #ifdef CONFIG_PM
  92         .suspend        = ahd_linux_pci_dev_suspend,
  93         .resume         = ahd_linux_pci_dev_resume,
  94 #endif
  95         .remove         = ahd_linux_pci_dev_remove,
  96         .id_table       = ahd_linux_pci_id_table
  97 };
  98
  99 static int
 100 ahd_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
 101 {
 102         struct ahd_softc *ahd = pci_get_drvdata(pdev);
 103         int rc;
 104
 105         if ((rc = ahd_suspend(ahd)))
 106                 return rc;
 107
 108         ahd_pci_suspend(ahd);
 109
 110         pci_save_state(pdev);
 111         pci_disable_device(pdev);
 112
 113         if (mesg.event == PM_EVENT_SUSPEND)
 114                 pci_set_power_state(pdev, PCI_D3hot);
 115
 116         return rc;
 117 }
 118
 119 static int
 120 ahd_linux_pci_dev_resume(struct pci_dev *pdev)
 121 {
 122         struct ahd_softc *ahd = pci_get_drvdata(pdev);
 123         int rc;
 124
 125         pci_set_power_state(pdev, PCI_D0);
 126         pci_restore_state(pdev);
 127
 128         if ((rc = pci_enable_device(pdev))) {
 129                 dev_printk(KERN_ERR, &pdev->dev,
 130                            "failed to enable device after resume (%d)\n", rc);
 131                 return rc;
 132         }
 133
 134         pci_set_master(pdev);
 135
 136         ahd_pci_resume(ahd);
 137
 138         ahd_resume(ahd);
 139
 140         return rc;
 141 }
 142
 143 static void
 144 ahd_linux_pci_dev_remove(struct pci_dev *pdev)
 145 {
 146         struct ahd_softc *ahd = pci_get_drvdata(pdev);
 147         u_long s;
 148
 149         if (ahd->platform_data && ahd->platform_data->host)
 150                         scsi_remove_host(ahd->platform_data->host);
 151
 152         ahd_lock(ahd, &s);
 153         ahd_intr_enable(ahd, FALSE);
 154         ahd_unlock(ahd, &s);
 155         ahd_free(ahd);
 156 }
 157
 158 static void
 159 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
 160 {
 161         struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
 162         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
 163
 164         master_pdev = pci_get_slot(pdev->bus, master_devfn);
 165         if (master_pdev) {
 166                 struct ahd_softc *master = pci_get_drvdata(master_pdev);
 167                 if (master) {
 168                         ahd->flags &= ~AHD_BIOS_ENABLED;
 169                         ahd->flags |= master->flags & AHD_BIOS_ENABLED;
 170                 } else
 171                         printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
 172                 pci_dev_put(master_pdev);
 173         }
 174 }
 175
 176 static int
 177 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 178 {
 179         char             buf[80];
 180         struct           ahd_softc *ahd;
 181         ahd_dev_softc_t  pci;
 182         struct           ahd_pci_identity *entry;
 183         char            *name;
 184         int              error;
 185         struct device   *dev = &pdev->dev;
 186
 187         pci = pdev;
 188         entry = ahd_find_pci_device(pci);
 189         if (entry == NULL)
 190                 return (-ENODEV);
 191
 192         /*
 193          * Allocate a softc for this card and
 194          * set it up for attachment by our
 195          * common detect routine.
 196          */
 197         sprintf(buf, "ahd_pci:%d:%d:%d",
 198                 ahd_get_pci_bus(pci),
 199                 ahd_get_pci_slot(pci),
 200                 ahd_get_pci_function(pci));
 201         name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
 202         if (name == NULL)
 203                 return (-ENOMEM);
 204         strcpy(name, buf);
 205         ahd = ahd_alloc(NULL, name);
 206         if (ahd == NULL)
 207                 return (-ENOMEM);
 208         if (pci_enable_device(pdev)) {
 209                 ahd_free(ahd);
 210                 return (-ENODEV);
 211         }
 212         pci_set_master(pdev);
 213
 214         if (sizeof(dma_addr_t) > 4) {
 215                 const u64 required_mask = dma_get_required_mask(dev);
 216
 217                 if (required_mask > DMA_39BIT_MASK &&
 218                     dma_set_mask(dev, DMA_64BIT_MASK) == 0)
 219                         ahd->flags |= AHD_64BIT_ADDRESSING;
 220                 else if (required_mask > DMA_32BIT_MASK &&
 221                          dma_set_mask(dev, DMA_39BIT_MASK) == 0)
 222                         ahd->flags |= AHD_39BIT_ADDRESSING;
 223                 else
 224                         dma_set_mask(dev, DMA_32BIT_MASK);
 225         } else {
 226                 dma_set_mask(dev, DMA_32BIT_MASK);
 227         }
 228         ahd->dev_softc = pci;
 229         error = ahd_pci_config(ahd, entry);
 230         if (error != 0) {
 231                 ahd_free(ahd);
 232                 return (-error);
 233         }
 234
 235         /*
 236          * Second Function PCI devices need to inherit some
 237          * * settings from function 0.
 238          */
 239         if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
 240                 ahd_linux_pci_inherit_flags(ahd);
 241
 242         pci_set_drvdata(pdev, ahd);
 243
 244         ahd_linux_register_host(ahd, &aic79xx_driver_template);
 245         return (0);
 246 }
 247
 248 int
 249 ahd_linux_pci_init(void)
 250 {
 251         return pci_register_driver(&aic79xx_pci_driver);
 252 }
 253
 254 void
 255 ahd_linux_pci_exit(void)
 256 {
 257         pci_unregister_driver(&aic79xx_pci_driver);
 258 }
 259
 260 static int
 261 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
 262                                  u_long *base2)
 263 {
 264         *base = pci_resource_start(ahd->dev_softc, 0);
 265         /*
 266          * This is really the 3rd bar and should be at index 2,
 267          * but the Linux PCI code doesn't know how to "count" 64bit
 268          * bars.
 269          */
 270         *base2 = pci_resource_start(ahd->dev_softc, 3);
 271         if (*base == 0 || *base2 == 0)
 272                 return (ENOMEM);
 273         if (!request_region(*base, 256, "aic79xx"))
 274                 return (ENOMEM);
 275         if (!request_region(*base2, 256, "aic79xx")) {
 276                 release_region(*base, 256);
 277                 return (ENOMEM);
 278         }
 279         return (0);
 280 }
 281
 282 static int
 283 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
 284                                  u_long *bus_addr,
 285                                  uint8_t __iomem **maddr)
 286 {
 287         u_long  start;
 288         u_long  base_page;
 289         u_long  base_offset;
 290         int     error = 0;
 291
 292         if (aic79xx_allow_memio == 0)
 293                 return (ENOMEM);
 294
 295         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
 296                 return (ENOMEM);
 297
 298         start = pci_resource_start(ahd->dev_softc, 1);
 299         base_page = start & PAGE_MASK;
 300         base_offset = start - base_page;
 301         if (start != 0) {
 302                 *bus_addr = start;
 303                 if (!request_mem_region(start, 0x1000, "aic79xx"))
 304                         error = ENOMEM;
 305                 if (!error) {
 306                         *maddr = ioremap_nocache(base_page, base_offset + 512);
 307                         if (*maddr == NULL) {
 308                                 error = ENOMEM;
 309                                 release_mem_region(start, 0x1000);
 310                         } else
 311                                 *maddr += base_offset;
 312                 }
 313         } else
 314                 error = ENOMEM;
 315         return (error);
 316 }
 317
 318 int
 319 ahd_pci_map_registers(struct ahd_softc *ahd)
 320 {
 321         uint32_t command;
 322         u_long   base;
 323         uint8_t __iomem *maddr;
 324         int      error;
 325
 326         /*
 327          * If its allowed, we prefer memory mapped access.
 328          */
 329         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
 330         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 331         base = 0;
 332         maddr = NULL;
 333         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
 334         if (error == 0) {
 335                 ahd->platform_data->mem_busaddr = base;
 336                 ahd->tags[0] = BUS_SPACE_MEMIO;
 337                 ahd->bshs[0].maddr = maddr;
 338                 ahd->tags[1] = BUS_SPACE_MEMIO;
 339                 ahd->bshs[1].maddr = maddr + 0x100;
 340                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 341                                      command | PCIM_CMD_MEMEN, 4);
 342
 343                 if (ahd_pci_test_register_access(ahd) != 0) {
 344
 345                         printf("aic79xx: PCI Device %d:%d:%d "
 346                                "failed memory mapped test.  Using PIO.\n",
 347                                ahd_get_pci_bus(ahd->dev_softc),
 348                                ahd_get_pci_slot(ahd->dev_softc),
 349                                ahd_get_pci_function(ahd->dev_softc));
 350                         iounmap(maddr);
 351                         release_mem_region(ahd->platform_data->mem_busaddr,
 352                                            0x1000);
 353                         ahd->bshs[0].maddr = NULL;
 354                         maddr = NULL;
 355                 } else
 356                         command |= PCIM_CMD_MEMEN;
 357         } else if (bootverbose) {
 358                 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
 359                        "unavailable. Cannot memory map device.\n",
 360                        ahd_get_pci_bus(ahd->dev_softc),
 361                        ahd_get_pci_slot(ahd->dev_softc),
 362                        ahd_get_pci_function(ahd->dev_softc),
 363                        base);
 364         }
 365
 366         if (maddr == NULL) {
 367                 u_long   base2;
 368
 369                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
 370                 if (error == 0) {
 371                         ahd->tags[0] = BUS_SPACE_PIO;
 372                         ahd->tags[1] = BUS_SPACE_PIO;
 373                         ahd->bshs[0].ioport = base;
 374                         ahd->bshs[1].ioport = base2;
 375                         command |= PCIM_CMD_PORTEN;
 376                 } else {
 377                         printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
 378                                "unavailable. Cannot map device.\n",
 379                                ahd_get_pci_bus(ahd->dev_softc),
 380                                ahd_get_pci_slot(ahd->dev_softc),
 381                                ahd_get_pci_function(ahd->dev_softc),
 382                                base, base2);
 383                 }
 384         }
 385         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
 386         return (error);
 387 }
 388
 389 int
 390 ahd_pci_map_int(struct ahd_softc *ahd)
 391 {
 392         int error;
 393
 394         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
 395                             IRQF_SHARED, "aic79xx", ahd);
 396         if (!error)
 397                 ahd->platform_data->irq = ahd->dev_softc->irq;
 398
 399         return (-error);
 400 }
 401
 402 void
 403 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
 404 {
 405         pci_set_power_state(ahd->dev_softc, new_state);
 406 }