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         /* aic7902 based controllers */
  66         ID(ID_AHA_29320),
  67         ID(ID_AHA_29320B),
  68         ID(ID_AHA_29320LP),
  69         ID(ID_AHA_39320),
  70         ID(ID_AHA_39320_B),
  71         ID(ID_AHA_39320A),
  72         ID(ID_AHA_39320D),
  73         ID(ID_AHA_39320D_HP),
  74         ID(ID_AHA_39320D_B),
  75         ID(ID_AHA_39320D_B_HP),
  76         /* Generic chip probes for devices we don't know exactly. */
  77         ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
  78         ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
  79         ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
  80         { 0 }
  81 };
  82
  83 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
  84
  85 struct pci_driver aic79xx_pci_driver = {
  86         .name           = "aic79xx",
  87         .probe          = ahd_linux_pci_dev_probe,
  88         .remove         = ahd_linux_pci_dev_remove,
  89         .id_table       = ahd_linux_pci_id_table
  90 };
  91
  92 static void
  93 ahd_linux_pci_dev_remove(struct pci_dev *pdev)
  94 {
  95         struct ahd_softc *ahd = pci_get_drvdata(pdev);
  96         u_long s;
  97
  98         ahd_lock(ahd, &s);
  99         ahd_intr_enable(ahd, FALSE);
 100         ahd_unlock(ahd, &s);
 101         ahd_free(ahd);
 102 }
 103
 104 static void
 105 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
 106 {
 107         struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
 108         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
 109
 110         master_pdev = pci_get_slot(pdev->bus, master_devfn);
 111         if (master_pdev) {
 112                 struct ahd_softc *master = pci_get_drvdata(master_pdev);
 113                 if (master) {
 114                         ahd->flags &= ~AHD_BIOS_ENABLED;
 115                         ahd->flags |= master->flags & AHD_BIOS_ENABLED;
 116                 } else
 117                         printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
 118                 pci_dev_put(master_pdev);
 119         }
 120 }
 121
 122 static int
 123 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 124 {
 125         char             buf[80];
 126         struct           ahd_softc *ahd;
 127         ahd_dev_softc_t  pci;
 128         struct           ahd_pci_identity *entry;
 129         char            *name;
 130         int              error;
 131
 132         pci = pdev;
 133         entry = ahd_find_pci_device(pci);
 134         if (entry == NULL)
 135                 return (-ENODEV);
 136
 137         /*
 138          * Allocate a softc for this card and
 139          * set it up for attachment by our
 140          * common detect routine.
 141          */
 142         sprintf(buf, "ahd_pci:%d:%d:%d",
 143                 ahd_get_pci_bus(pci),
 144                 ahd_get_pci_slot(pci),
 145                 ahd_get_pci_function(pci));
 146         name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
 147         if (name == NULL)
 148                 return (-ENOMEM);
 149         strcpy(name, buf);
 150         ahd = ahd_alloc(NULL, name);
 151         if (ahd == NULL)
 152                 return (-ENOMEM);
 153         if (pci_enable_device(pdev)) {
 154                 ahd_free(ahd);
 155                 return (-ENODEV);
 156         }
 157         pci_set_master(pdev);
 158
 159         if (sizeof(dma_addr_t) > 4) {
 160                 uint64_t   memsize;
 161                 const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
 162
 163                 memsize = ahd_linux_get_memsize();
 164
 165                 if (memsize >= 0x8000000000ULL
 166                  && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
 167                         ahd->flags |= AHD_64BIT_ADDRESSING;
 168                 } else if (memsize > 0x80000000
 169                         && pci_set_dma_mask(pdev, mask_39bit) == 0) {
 170                         ahd->flags |= AHD_39BIT_ADDRESSING;
 171                 }
 172         } else {
 173                 pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 174         }
 175         ahd->dev_softc = pci;
 176         error = ahd_pci_config(ahd, entry);
 177         if (error != 0) {
 178                 ahd_free(ahd);
 179                 return (-error);
 180         }
 181
 182         /*
 183          * Second Function PCI devices need to inherit some
 184          * * settings from function 0.
 185          */
 186         if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
 187                 ahd_linux_pci_inherit_flags(ahd);
 188
 189         pci_set_drvdata(pdev, ahd);
 190
 191         ahd_linux_register_host(ahd, &aic79xx_driver_template);
 192         return (0);
 193 }
 194
 195 int
 196 ahd_linux_pci_init(void)
 197 {
 198         return (pci_module_init(&aic79xx_pci_driver));
 199 }
 200
 201 void
 202 ahd_linux_pci_exit(void)
 203 {
 204         pci_unregister_driver(&aic79xx_pci_driver);
 205 }
 206
 207 static int
 208 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
 209                                  u_long *base2)
 210 {
 211         *base = pci_resource_start(ahd->dev_softc, 0);
 212         /*
 213          * This is really the 3rd bar and should be at index 2,
 214          * but the Linux PCI code doesn't know how to "count" 64bit
 215          * bars.
 216          */
 217         *base2 = pci_resource_start(ahd->dev_softc, 3);
 218         if (*base == 0 || *base2 == 0)
 219                 return (ENOMEM);
 220         if (request_region(*base, 256, "aic79xx") == 0)
 221                 return (ENOMEM);
 222         if (request_region(*base2, 256, "aic79xx") == 0) {
 223                 release_region(*base2, 256);
 224                 return (ENOMEM);
 225         }
 226         return (0);
 227 }
 228
 229 static int
 230 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
 231                                  u_long *bus_addr,
 232                                  uint8_t __iomem **maddr)
 233 {
 234         u_long  start;
 235         u_long  base_page;
 236         u_long  base_offset;
 237         int     error;
 238
 239         if (aic79xx_allow_memio == 0)
 240                 return (ENOMEM);
 241
 242         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
 243                 return (ENOMEM);
 244
 245         error = 0;
 246         start = pci_resource_start(ahd->dev_softc, 1);
 247         base_page = start & PAGE_MASK;
 248         base_offset = start - base_page;
 249         if (start != 0) {
 250                 *bus_addr = start;
 251                 if (request_mem_region(start, 0x1000, "aic79xx") == 0)
 252                         error = ENOMEM;
 253                 if (error == 0) {
 254                         *maddr = ioremap_nocache(base_page, base_offset + 256);
 255                         if (*maddr == NULL) {
 256                                 error = ENOMEM;
 257                                 release_mem_region(start, 0x1000);
 258                         } else
 259                                 *maddr += base_offset;
 260                 }
 261         } else
 262                 error = ENOMEM;
 263         return (error);
 264 }
 265
 266 int
 267 ahd_pci_map_registers(struct ahd_softc *ahd)
 268 {
 269         uint32_t command;
 270         u_long   base;
 271         uint8_t __iomem *maddr;
 272         int      error;
 273
 274         /*
 275          * If its allowed, we prefer memory mapped access.
 276          */
 277         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
 278         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 279         base = 0;
 280         maddr = NULL;
 281         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
 282         if (error == 0) {
 283                 ahd->platform_data->mem_busaddr = base;
 284                 ahd->tags[0] = BUS_SPACE_MEMIO;
 285                 ahd->bshs[0].maddr = maddr;
 286                 ahd->tags[1] = BUS_SPACE_MEMIO;
 287                 ahd->bshs[1].maddr = maddr + 0x100;
 288                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 289                                      command | PCIM_CMD_MEMEN, 4);
 290
 291                 if (ahd_pci_test_register_access(ahd) != 0) {
 292
 293                         printf("aic79xx: PCI Device %d:%d:%d "
 294                                "failed memory mapped test.  Using PIO.\n",
 295                                ahd_get_pci_bus(ahd->dev_softc),
 296                                ahd_get_pci_slot(ahd->dev_softc),
 297                                ahd_get_pci_function(ahd->dev_softc));
 298                         iounmap(maddr);
 299                         release_mem_region(ahd->platform_data->mem_busaddr,
 300                                            0x1000);
 301                         ahd->bshs[0].maddr = NULL;
 302                         maddr = NULL;
 303                 } else
 304                         command |= PCIM_CMD_MEMEN;
 305         } else if (bootverbose) {
 306                 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
 307                        "unavailable. Cannot memory map device.\n",
 308                        ahd_get_pci_bus(ahd->dev_softc),
 309                        ahd_get_pci_slot(ahd->dev_softc),
 310                        ahd_get_pci_function(ahd->dev_softc),
 311                        base);
 312         }
 313
 314         if (maddr == NULL) {
 315                 u_long   base2;
 316
 317                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
 318                 if (error == 0) {
 319                         ahd->tags[0] = BUS_SPACE_PIO;
 320                         ahd->tags[1] = BUS_SPACE_PIO;
 321                         ahd->bshs[0].ioport = base;
 322                         ahd->bshs[1].ioport = base2;
 323                         command |= PCIM_CMD_PORTEN;
 324                 } else {
 325                         printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
 326                                "unavailable. Cannot map device.\n",
 327                                ahd_get_pci_bus(ahd->dev_softc),
 328                                ahd_get_pci_slot(ahd->dev_softc),
 329                                ahd_get_pci_function(ahd->dev_softc),
 330                                base, base2);
 331                 }
 332         }
 333         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
 334         return (error);
 335 }
 336
 337 int
 338 ahd_pci_map_int(struct ahd_softc *ahd)
 339 {
 340         int error;
 341
 342         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
 343                             SA_SHIRQ, "aic79xx", ahd);
 344         if (error == 0)
 345                 ahd->platform_data->irq = ahd->dev_softc->irq;
 346
 347         return (-error);
 348 }
 349
 350 void
 351 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
 352 {
 353         pci_set_power_state(ahd->dev_softc, new_state);
 354 }