scsi/aic7xxx/aic79xx_osm_pci.c

0001 /*
0002  * Linux driver attachment glue for PCI based U320 controllers.
0003  *
0004  * Copyright (c) 2000-2001 Adaptec Inc.
0005  * All rights reserved.
0006  *
0007  * Redistribution and use in source and binary forms, with or without
0008  * modification, are permitted provided that the following conditions
0009  * are met:
0010  * 1. Redistributions of source code must retain the above copyright
0011  *    notice, this list of conditions, and the following disclaimer,
0012  *    without modification.
0013  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
0014  *    substantially similar to the "NO WARRANTY" disclaimer below
0015  *    ("Disclaimer") and any redistribution must be conditioned upon
0016  *    including a substantially similar Disclaimer requirement for further
0017  *    binary redistribution.
0018  * 3. Neither the names of the above-listed copyright holders nor the names
0019  *    of any contributors may be used to endorse or promote products derived
0020  *    from this software without specific prior written permission.
0021  *
0022  * Alternatively, this software may be distributed under the terms of the
0023  * GNU General Public License ("GPL") version 2 as published by the Free
0024  * Software Foundation.
0025  *
0026  * NO WARRANTY
0027  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
0028  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
0029  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
0030  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
0031  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
0032  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
0033  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
0034  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
0035  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
0036  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0037  * POSSIBILITY OF SUCH DAMAGES.
0038  *
0039  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm_pci.c#25 $
0040  */
0041
0042 #include "aic79xx_osm.h"
0043 #include "aic79xx_inline.h"
0044 #include "aic79xx_pci.h"
0045
0046 /* Define the macro locally since it's different for different class of chips.
0047  */
0048 #define ID(x)        \
0049     ID2C(x),     \
0050     ID2C(IDIROC(x))
0051
0052 static const struct pci_device_id ahd_linux_pci_id_table[] = {
0053     /* aic7901 based controllers */
0054     ID(ID_AHA_29320A),
0055     ID(ID_AHA_29320ALP),
0056     ID(ID_AHA_29320LPE),
0057     /* aic7902 based controllers */
0058     ID(ID_AHA_29320),
0059     ID(ID_AHA_29320B),
0060     ID(ID_AHA_29320LP),
0061     ID(ID_AHA_39320),
0062     ID(ID_AHA_39320_B),
0063     ID(ID_AHA_39320A),
0064     ID(ID_AHA_39320D),
0065     ID(ID_AHA_39320D_HP),
0066     ID(ID_AHA_39320D_B),
0067     ID(ID_AHA_39320D_B_HP),
0068     /* Generic chip probes for devices we don't know exactly. */
0069     ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
0070     ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
0071     ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
0072     { 0 }
0073 };
0074
0075 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
0076
0077 static int __maybe_unused
0078 ahd_linux_pci_dev_suspend(struct device *dev)
0079 {
0080     struct ahd_softc *ahd = dev_get_drvdata(dev);
0081     int rc;
0082
0083     if ((rc = ahd_suspend(ahd)))
0084         return rc;
0085
0086     ahd_pci_suspend(ahd);
0087
0088     return rc;
0089 }
0090
0091 static int __maybe_unused
0092 ahd_linux_pci_dev_resume(struct device *dev)
0093 {
0094     struct ahd_softc *ahd = dev_get_drvdata(dev);
0095
0096     ahd_pci_resume(ahd);
0097
0098     ahd_resume(ahd);
0099
0100     return 0;
0101 }
0102
0103 static void
0104 ahd_linux_pci_dev_remove(struct pci_dev *pdev)
0105 {
0106     struct ahd_softc *ahd = pci_get_drvdata(pdev);
0107     u_long s;
0108
0109     if (ahd->platform_data && ahd->platform_data->host)
0110             scsi_remove_host(ahd->platform_data->host);
0111
0112     ahd_lock(ahd, &s);
0113     ahd_intr_enable(ahd, FALSE);
0114     ahd_unlock(ahd, &s);
0115     ahd_free(ahd);
0116 }
0117
0118 static void
0119 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
0120 {
0121     struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
0122     unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
0123
0124     master_pdev = pci_get_slot(pdev->bus, master_devfn);
0125     if (master_pdev) {
0126         struct ahd_softc *master = pci_get_drvdata(master_pdev);
0127         if (master) {
0128             ahd->flags &= ~AHD_BIOS_ENABLED;
0129             ahd->flags |= master->flags & AHD_BIOS_ENABLED;
0130         } else
0131             printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
0132         pci_dev_put(master_pdev);
0133     }
0134 }
0135
0136 static int
0137 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
0138 {
0139     char         buf[80];
0140     struct       ahd_softc *ahd;
0141     ahd_dev_softc_t  pci;
0142     const struct ahd_pci_identity *entry;
0143     char        *name;
0144     int      error;
0145     struct device   *dev = &pdev->dev;
0146
0147     pci = pdev;
0148     entry = ahd_find_pci_device(pci);
0149     if (entry == NULL)
0150         return (-ENODEV);
0151
0152     /*
0153      * Allocate a softc for this card and
0154      * set it up for attachment by our
0155      * common detect routine.
0156      */
0157     sprintf(buf, "ahd_pci:%d:%d:%d",
0158         ahd_get_pci_bus(pci),
0159         ahd_get_pci_slot(pci),
0160         ahd_get_pci_function(pci));
0161     name = kstrdup(buf, GFP_ATOMIC);
0162     if (name == NULL)
0163         return (-ENOMEM);
0164     ahd = ahd_alloc(NULL, name);
0165     if (ahd == NULL)
0166         return (-ENOMEM);
0167     if (pci_enable_device(pdev)) {
0168         ahd_free(ahd);
0169         return (-ENODEV);
0170     }
0171     pci_set_master(pdev);
0172
0173     if (sizeof(dma_addr_t) > 4) {
0174         const u64 required_mask = dma_get_required_mask(dev);
0175
0176         if (required_mask > DMA_BIT_MASK(39) &&
0177             dma_set_mask(dev, DMA_BIT_MASK(64)) == 0)
0178             ahd->flags |= AHD_64BIT_ADDRESSING;
0179         else if (required_mask > DMA_BIT_MASK(32) &&
0180              dma_set_mask(dev, DMA_BIT_MASK(39)) == 0)
0181             ahd->flags |= AHD_39BIT_ADDRESSING;
0182         else
0183             dma_set_mask(dev, DMA_BIT_MASK(32));
0184     } else {
0185         dma_set_mask(dev, DMA_BIT_MASK(32));
0186     }
0187     ahd->dev_softc = pci;
0188     error = ahd_pci_config(ahd, entry);
0189     if (error != 0) {
0190         ahd_free(ahd);
0191         return (-error);
0192     }
0193
0194     /*
0195      * Second Function PCI devices need to inherit some
0196      * * settings from function 0.
0197      */
0198     if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
0199         ahd_linux_pci_inherit_flags(ahd);
0200
0201     pci_set_drvdata(pdev, ahd);
0202
0203     ahd_linux_register_host(ahd, &aic79xx_driver_template);
0204     return (0);
0205 }
0206
0207 static SIMPLE_DEV_PM_OPS(ahd_linux_pci_dev_pm_ops,
0208              ahd_linux_pci_dev_suspend,
0209              ahd_linux_pci_dev_resume);
0210
0211 static struct pci_driver aic79xx_pci_driver = {
0212     .name       = "aic79xx",
0213     .probe      = ahd_linux_pci_dev_probe,
0214     .driver.pm  = &ahd_linux_pci_dev_pm_ops,
0215     .remove     = ahd_linux_pci_dev_remove,
0216     .id_table   = ahd_linux_pci_id_table
0217 };
0218
0219 int
0220 ahd_linux_pci_init(void)
0221 {
0222     return pci_register_driver(&aic79xx_pci_driver);
0223 }
0224
0225 void
0226 ahd_linux_pci_exit(void)
0227 {
0228     pci_unregister_driver(&aic79xx_pci_driver);
0229 }
0230
0231 static int
0232 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,
0233                  resource_size_t *base2)
0234 {
0235     *base = pci_resource_start(ahd->dev_softc, 0);
0236     /*
0237      * This is really the 3rd bar and should be at index 2,
0238      * but the Linux PCI code doesn't know how to "count" 64bit
0239      * bars.
0240      */
0241     *base2 = pci_resource_start(ahd->dev_softc, 3);
0242     if (*base == 0 || *base2 == 0)
0243         return (ENOMEM);
0244     if (!request_region(*base, 256, "aic79xx"))
0245         return (ENOMEM);
0246     if (!request_region(*base2, 256, "aic79xx")) {
0247         release_region(*base, 256);
0248         return (ENOMEM);
0249     }
0250     return (0);
0251 }
0252
0253 static int
0254 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
0255                  resource_size_t *bus_addr,
0256                  uint8_t __iomem **maddr)
0257 {
0258     resource_size_t start;
0259     resource_size_t base_page;
0260     u_long  base_offset;
0261     int error = 0;
0262
0263     if (aic79xx_allow_memio == 0)
0264         return (ENOMEM);
0265
0266     if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
0267         return (ENOMEM);
0268
0269     start = pci_resource_start(ahd->dev_softc, 1);
0270     base_page = start & PAGE_MASK;
0271     base_offset = start - base_page;
0272     if (start != 0) {
0273         *bus_addr = start;
0274         if (!request_mem_region(start, 0x1000, "aic79xx"))
0275             error = ENOMEM;
0276         if (!error) {
0277             *maddr = ioremap(base_page, base_offset + 512);
0278             if (*maddr == NULL) {
0279                 error = ENOMEM;
0280                 release_mem_region(start, 0x1000);
0281             } else
0282                 *maddr += base_offset;
0283         }
0284     } else
0285         error = ENOMEM;
0286     return (error);
0287 }
0288
0289 int
0290 ahd_pci_map_registers(struct ahd_softc *ahd)
0291 {
0292     uint32_t command;
0293     resource_size_t base;
0294     uint8_t __iomem *maddr;
0295     int  error;
0296
0297     /*
0298      * If its allowed, we prefer memory mapped access.
0299      */
0300     command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
0301     command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
0302     base = 0;
0303     maddr = NULL;
0304     error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
0305     if (error == 0) {
0306         ahd->platform_data->mem_busaddr = base;
0307         ahd->tags[0] = BUS_SPACE_MEMIO;
0308         ahd->bshs[0].maddr = maddr;
0309         ahd->tags[1] = BUS_SPACE_MEMIO;
0310         ahd->bshs[1].maddr = maddr + 0x100;
0311         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
0312                      command | PCIM_CMD_MEMEN, 4);
0313
0314         if (ahd_pci_test_register_access(ahd) != 0) {
0315
0316             printk("aic79xx: PCI Device %d:%d:%d "
0317                    "failed memory mapped test.  Using PIO.\n",
0318                    ahd_get_pci_bus(ahd->dev_softc),
0319                    ahd_get_pci_slot(ahd->dev_softc),
0320                    ahd_get_pci_function(ahd->dev_softc));
0321             iounmap(maddr);
0322             release_mem_region(ahd->platform_data->mem_busaddr,
0323                        0x1000);
0324             ahd->bshs[0].maddr = NULL;
0325             maddr = NULL;
0326         } else
0327             command |= PCIM_CMD_MEMEN;
0328     } else if (bootverbose) {
0329         printk("aic79xx: PCI%d:%d:%d MEM region 0x%llx "
0330                "unavailable. Cannot memory map device.\n",
0331                ahd_get_pci_bus(ahd->dev_softc),
0332                ahd_get_pci_slot(ahd->dev_softc),
0333                ahd_get_pci_function(ahd->dev_softc),
0334                (unsigned long long)base);
0335     }
0336
0337     if (maddr == NULL) {
0338         resource_size_t base2;
0339
0340         error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
0341         if (error == 0) {
0342             ahd->tags[0] = BUS_SPACE_PIO;
0343             ahd->tags[1] = BUS_SPACE_PIO;
0344             ahd->bshs[0].ioport = (u_long)base;
0345             ahd->bshs[1].ioport = (u_long)base2;
0346             command |= PCIM_CMD_PORTEN;
0347         } else {
0348             printk("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "
0349                    "0x%llx unavailable. Cannot map device.\n",
0350                    ahd_get_pci_bus(ahd->dev_softc),
0351                    ahd_get_pci_slot(ahd->dev_softc),
0352                    ahd_get_pci_function(ahd->dev_softc),
0353                    (unsigned long long)base,
0354                    (unsigned long long)base2);
0355         }
0356     }
0357     ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
0358     return (error);
0359 }
0360
0361 int
0362 ahd_pci_map_int(struct ahd_softc *ahd)
0363 {
0364     int error;
0365
0366     error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
0367                 IRQF_SHARED, "aic79xx", ahd);
0368     if (!error)
0369         ahd->platform_data->irq = ahd->dev_softc->irq;
0370
0371     return (-error);
0372 }
0373
0374 void
0375 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
0376 {
0377     pci_set_power_state(ahd->dev_softc, new_state);
0378 }