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
 136         pci = pdev;
 137         entry = ahd_find_pci_device(pci);
 138         if (entry == NULL)
 139                 return (-ENODEV);
 140
 141         /*
 142          * Allocate a softc for this card and
 143          * set it up for attachment by our
 144          * common detect routine.
 145          */
 146         sprintf(buf, "ahd_pci:%d:%d:%d",
 147                 ahd_get_pci_bus(pci),
 148                 ahd_get_pci_slot(pci),
 149                 ahd_get_pci_function(pci));
 150         name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
 151         if (name == NULL)
 152                 return (-ENOMEM);
 153         strcpy(name, buf);
 154         ahd = ahd_alloc(NULL, name);
 155         if (ahd == NULL)
 156                 return (-ENOMEM);
 157         if (pci_enable_device(pdev)) {
 158                 ahd_free(ahd);
 159                 return (-ENODEV);
 160         }
 161         pci_set_master(pdev);
 162
 163         if (sizeof(dma_addr_t) > 4) {
 164                 uint64_t   memsize;
 165                 const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
 166
 167                 memsize = ahd_linux_get_memsize();
 168
 169                 if (memsize >= 0x8000000000ULL
 170                  && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
 171                         ahd->flags |= AHD_64BIT_ADDRESSING;
 172                 } else if (memsize > 0x80000000
 173                         && pci_set_dma_mask(pdev, mask_39bit) == 0) {
 174                         ahd->flags |= AHD_39BIT_ADDRESSING;
 175                 }
 176         } else {
 177                 pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 178         }
 179         ahd->dev_softc = pci;
 180         error = ahd_pci_config(ahd, entry);
 181         if (error != 0) {
 182                 ahd_free(ahd);
 183                 return (-error);
 184         }
 185
 186         /*
 187          * Second Function PCI devices need to inherit some
 188          * * settings from function 0.
 189          */
 190         if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
 191                 ahd_linux_pci_inherit_flags(ahd);
 192
 193         pci_set_drvdata(pdev, ahd);
 194
 195         ahd_linux_register_host(ahd, &aic79xx_driver_template);
 196         return (0);
 197 }
 198
 199 int
 200 ahd_linux_pci_init(void)
 201 {
 202         return pci_register_driver(&aic79xx_pci_driver);
 203 }
 204
 205 void
 206 ahd_linux_pci_exit(void)
 207 {
 208         pci_unregister_driver(&aic79xx_pci_driver);
 209 }
 210
 211 static int
 212 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
 213                                  u_long *base2)
 214 {
 215         *base = pci_resource_start(ahd->dev_softc, 0);
 216         /*
 217          * This is really the 3rd bar and should be at index 2,
 218          * but the Linux PCI code doesn't know how to "count" 64bit
 219          * bars.
 220          */
 221         *base2 = pci_resource_start(ahd->dev_softc, 3);
 222         if (*base == 0 || *base2 == 0)
 223                 return (ENOMEM);
 224         if (!request_region(*base, 256, "aic79xx"))
 225                 return (ENOMEM);
 226         if (!request_region(*base2, 256, "aic79xx")) {
 227                 release_region(*base, 256);
 228                 return (ENOMEM);
 229         }
 230         return (0);
 231 }
 232
 233 static int
 234 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
 235                                  u_long *bus_addr,
 236                                  uint8_t __iomem **maddr)
 237 {
 238         u_long  start;
 239         u_long  base_page;
 240         u_long  base_offset;
 241         int     error = 0;
 242
 243         if (aic79xx_allow_memio == 0)
 244                 return (ENOMEM);
 245
 246         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
 247                 return (ENOMEM);
 248
 249         start = pci_resource_start(ahd->dev_softc, 1);
 250         base_page = start & PAGE_MASK;
 251         base_offset = start - base_page;
 252         if (start != 0) {
 253                 *bus_addr = start;
 254                 if (!request_mem_region(start, 0x1000, "aic79xx"))
 255                         error = ENOMEM;
 256                 if (!error) {
 257                         *maddr = ioremap_nocache(base_page, base_offset + 512);
 258                         if (*maddr == NULL) {
 259                                 error = ENOMEM;
 260                                 release_mem_region(start, 0x1000);
 261                         } else
 262                                 *maddr += base_offset;
 263                 }
 264         } else
 265                 error = ENOMEM;
 266         return (error);
 267 }
 268
 269 int
 270 ahd_pci_map_registers(struct ahd_softc *ahd)
 271 {
 272         uint32_t command;
 273         u_long   base;
 274         uint8_t __iomem *maddr;
 275         int      error;
 276
 277         /*
 278          * If its allowed, we prefer memory mapped access.
 279          */
 280         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
 281         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 282         base = 0;
 283         maddr = NULL;
 284         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
 285         if (error == 0) {
 286                 ahd->platform_data->mem_busaddr = base;
 287                 ahd->tags[0] = BUS_SPACE_MEMIO;
 288                 ahd->bshs[0].maddr = maddr;
 289                 ahd->tags[1] = BUS_SPACE_MEMIO;
 290                 ahd->bshs[1].maddr = maddr + 0x100;
 291                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 292                                      command | PCIM_CMD_MEMEN, 4);
 293
 294                 if (ahd_pci_test_register_access(ahd) != 0) {
 295
 296                         printf("aic79xx: PCI Device %d:%d:%d "
 297                                "failed memory mapped test.  Using PIO.\n",
 298                                ahd_get_pci_bus(ahd->dev_softc),
 299                                ahd_get_pci_slot(ahd->dev_softc),
 300                                ahd_get_pci_function(ahd->dev_softc));
 301                         iounmap(maddr);
 302                         release_mem_region(ahd->platform_data->mem_busaddr,
 303                                            0x1000);
 304                         ahd->bshs[0].maddr = NULL;
 305                         maddr = NULL;
 306                 } else
 307                         command |= PCIM_CMD_MEMEN;
 308         } else if (bootverbose) {
 309                 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
 310                        "unavailable. Cannot memory map device.\n",
 311                        ahd_get_pci_bus(ahd->dev_softc),
 312                        ahd_get_pci_slot(ahd->dev_softc),
 313                        ahd_get_pci_function(ahd->dev_softc),
 314                        base);
 315         }
 316
 317         if (maddr == NULL) {
 318                 u_long   base2;
 319
 320                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
 321                 if (error == 0) {
 322                         ahd->tags[0] = BUS_SPACE_PIO;
 323                         ahd->tags[1] = BUS_SPACE_PIO;
 324                         ahd->bshs[0].ioport = base;
 325                         ahd->bshs[1].ioport = base2;
 326                         command |= PCIM_CMD_PORTEN;
 327                 } else {
 328                         printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
 329                                "unavailable. Cannot map device.\n",
 330                                ahd_get_pci_bus(ahd->dev_softc),
 331                                ahd_get_pci_slot(ahd->dev_softc),
 332                                ahd_get_pci_function(ahd->dev_softc),
 333                                base, base2);
 334                 }
 335         }
 336         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
 337         return (error);
 338 }
 339
 340 int
 341 ahd_pci_map_int(struct ahd_softc *ahd)
 342 {
 343         int error;
 344
 345         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
 346                             IRQF_SHARED, "aic79xx", ahd);
 347         if (!error)
 348                 ahd->platform_data->irq = ahd->dev_softc->irq;
 349
 350         return (-error);
 351 }
 352
 353 void
 354 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
 355 {
 356         pci_set_power_state(ahd->dev_softc, new_state);
 357 }