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;
  96         u_long l;
  97
  98         /*
  99          * We should be able to just perform
 100          * the free directly, but check our
 101          * list for extra sanity.
 102          */
 103         ahd_list_lock(&l);
 104         ahd = ahd_find_softc((struct ahd_softc *)pci_get_drvdata(pdev));
 105         if (ahd != NULL) {
 106                 u_long s;
 107
 108                 TAILQ_REMOVE(&ahd_tailq, ahd, links);
 109                 ahd_list_unlock(&l);
 110                 ahd_lock(ahd, &s);
 111                 ahd_intr_enable(ahd, FALSE);
 112                 ahd_unlock(ahd, &s);
 113                 ahd_free(ahd);
 114         } else
 115                 ahd_list_unlock(&l);
 116 }
 117
 118 static int
 119 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 120 {
 121         char             buf[80];
 122         struct           ahd_softc *ahd;
 123         ahd_dev_softc_t  pci;
 124         struct           ahd_pci_identity *entry;
 125         char            *name;
 126         int              error;
 127
 128         /*
 129          * Some BIOSen report the same device multiple times.
 130          */
 131         TAILQ_FOREACH(ahd, &ahd_tailq, links) {
 132                 struct pci_dev *probed_pdev;
 133
 134                 probed_pdev = ahd->dev_softc;
 135                 if (probed_pdev->bus->number == pdev->bus->number
 136                  && probed_pdev->devfn == pdev->devfn)
 137                         break;
 138         }
 139         if (ahd != NULL) {
 140                 /* Skip duplicate. */
 141                 return (-ENODEV);
 142         }
 143
 144         pci = pdev;
 145         entry = ahd_find_pci_device(pci);
 146         if (entry == NULL)
 147                 return (-ENODEV);
 148
 149         /*
 150          * Allocate a softc for this card and
 151          * set it up for attachment by our
 152          * common detect routine.
 153          */
 154         sprintf(buf, "ahd_pci:%d:%d:%d",
 155                 ahd_get_pci_bus(pci),
 156                 ahd_get_pci_slot(pci),
 157                 ahd_get_pci_function(pci));
 158         name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
 159         if (name == NULL)
 160                 return (-ENOMEM);
 161         strcpy(name, buf);
 162         ahd = ahd_alloc(NULL, name);
 163         if (ahd == NULL)
 164                 return (-ENOMEM);
 165         if (pci_enable_device(pdev)) {
 166                 ahd_free(ahd);
 167                 return (-ENODEV);
 168         }
 169         pci_set_master(pdev);
 170
 171         if (sizeof(dma_addr_t) > 4) {
 172                 uint64_t   memsize;
 173                 const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
 174
 175                 memsize = ahd_linux_get_memsize();
 176
 177                 if (memsize >= 0x8000000000ULL
 178                  && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
 179                         ahd->flags |= AHD_64BIT_ADDRESSING;
 180                         ahd->platform_data->hw_dma_mask = DMA_64BIT_MASK;
 181                 } else if (memsize > 0x80000000
 182                         && pci_set_dma_mask(pdev, mask_39bit) == 0) {
 183                         ahd->flags |= AHD_39BIT_ADDRESSING;
 184                         ahd->platform_data->hw_dma_mask = mask_39bit;
 185                 }
 186         } else {
 187                 pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 188                 ahd->platform_data->hw_dma_mask = DMA_32BIT_MASK;
 189         }
 190         ahd->dev_softc = pci;
 191         error = ahd_pci_config(ahd, entry);
 192         if (error != 0) {
 193                 ahd_free(ahd);
 194                 return (-error);
 195         }
 196         pci_set_drvdata(pdev, ahd);
 197         if (aic79xx_detect_complete) {
 198 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 199                 ahd_linux_register_host(ahd, &aic79xx_driver_template);
 200 #else
 201                 printf("aic79xx: ignoring PCI device found after "
 202                        "initialization\n");
 203                 return (-ENODEV);
 204 #endif
 205         }
 206         return (0);
 207 }
 208
 209 int
 210 ahd_linux_pci_init(void)
 211 {
 212         return (pci_module_init(&aic79xx_pci_driver));
 213 }
 214
 215 void
 216 ahd_linux_pci_exit(void)
 217 {
 218         pci_unregister_driver(&aic79xx_pci_driver);
 219 }
 220
 221 static int
 222 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
 223                                  u_long *base2)
 224 {
 225         *base = pci_resource_start(ahd->dev_softc, 0);
 226         /*
 227          * This is really the 3rd bar and should be at index 2,
 228          * but the Linux PCI code doesn't know how to "count" 64bit
 229          * bars.
 230          */
 231         *base2 = pci_resource_start(ahd->dev_softc, 3);
 232         if (*base == 0 || *base2 == 0)
 233                 return (ENOMEM);
 234         if (request_region(*base, 256, "aic79xx") == 0)
 235                 return (ENOMEM);
 236         if (request_region(*base2, 256, "aic79xx") == 0) {
 237                 release_region(*base2, 256);
 238                 return (ENOMEM);
 239         }
 240         return (0);
 241 }
 242
 243 static int
 244 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
 245                                  u_long *bus_addr,
 246                                  uint8_t __iomem **maddr)
 247 {
 248         u_long  start;
 249         u_long  base_page;
 250         u_long  base_offset;
 251         int     error;
 252
 253         if (aic79xx_allow_memio == 0)
 254                 return (ENOMEM);
 255
 256         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
 257                 return (ENOMEM);
 258
 259         error = 0;
 260         start = pci_resource_start(ahd->dev_softc, 1);
 261         base_page = start & PAGE_MASK;
 262         base_offset = start - base_page;
 263         if (start != 0) {
 264                 *bus_addr = start;
 265                 if (request_mem_region(start, 0x1000, "aic79xx") == 0)
 266                         error = ENOMEM;
 267                 if (error == 0) {
 268                         *maddr = ioremap_nocache(base_page, base_offset + 256);
 269                         if (*maddr == NULL) {
 270                                 error = ENOMEM;
 271                                 release_mem_region(start, 0x1000);
 272                         } else
 273                                 *maddr += base_offset;
 274                 }
 275         } else
 276                 error = ENOMEM;
 277         return (error);
 278 }
 279
 280 int
 281 ahd_pci_map_registers(struct ahd_softc *ahd)
 282 {
 283         uint32_t command;
 284         u_long   base;
 285         uint8_t __iomem *maddr;
 286         int      error;
 287
 288         /*
 289          * If its allowed, we prefer memory mapped access.
 290          */
 291         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
 292         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 293         base = 0;
 294         maddr = NULL;
 295         error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
 296         if (error == 0) {
 297                 ahd->platform_data->mem_busaddr = base;
 298                 ahd->tags[0] = BUS_SPACE_MEMIO;
 299                 ahd->bshs[0].maddr = maddr;
 300                 ahd->tags[1] = BUS_SPACE_MEMIO;
 301                 ahd->bshs[1].maddr = maddr + 0x100;
 302                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 303                                      command | PCIM_CMD_MEMEN, 4);
 304
 305                 if (ahd_pci_test_register_access(ahd) != 0) {
 306
 307                         printf("aic79xx: PCI Device %d:%d:%d "
 308                                "failed memory mapped test.  Using PIO.\n",
 309                                ahd_get_pci_bus(ahd->dev_softc),
 310                                ahd_get_pci_slot(ahd->dev_softc),
 311                                ahd_get_pci_function(ahd->dev_softc));
 312                         iounmap(maddr);
 313                         release_mem_region(ahd->platform_data->mem_busaddr,
 314                                            0x1000);
 315                         ahd->bshs[0].maddr = NULL;
 316                         maddr = NULL;
 317                 } else
 318                         command |= PCIM_CMD_MEMEN;
 319         } else if (bootverbose) {
 320                 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
 321                        "unavailable. Cannot memory map device.\n",
 322                        ahd_get_pci_bus(ahd->dev_softc),
 323                        ahd_get_pci_slot(ahd->dev_softc),
 324                        ahd_get_pci_function(ahd->dev_softc),
 325                        base);
 326         }
 327
 328         if (maddr == NULL) {
 329                 u_long   base2;
 330
 331                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
 332                 if (error == 0) {
 333                         ahd->tags[0] = BUS_SPACE_PIO;
 334                         ahd->tags[1] = BUS_SPACE_PIO;
 335                         ahd->bshs[0].ioport = base;
 336                         ahd->bshs[1].ioport = base2;
 337                         command |= PCIM_CMD_PORTEN;
 338                 } else {
 339                         printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
 340                                "unavailable. Cannot map device.\n",
 341                                ahd_get_pci_bus(ahd->dev_softc),
 342                                ahd_get_pci_slot(ahd->dev_softc),
 343                                ahd_get_pci_function(ahd->dev_softc),
 344                                base, base2);
 345                 }
 346         }
 347         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
 348         return (error);
 349 }
 350
 351 int
 352 ahd_pci_map_int(struct ahd_softc *ahd)
 353 {
 354         int error;
 355
 356         error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
 357                             SA_SHIRQ, "aic79xx", ahd);
 358         if (error == 0)
 359                 ahd->platform_data->irq = ahd->dev_softc->irq;
 360
 361         return (-error);
 362 }
 363
 364 void
 365 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
 366 {
 367         pci_set_power_state(ahd->dev_softc, new_state);
 368 }