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