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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 without8 * modification, are permitted provided that the following conditions9 * are met:10 * 1. Redistributions of source code must retain the above copyright11 * notice, this list of conditions, and the following disclaimer,12 * without modification.13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer14 * substantially similar to the "NO WARRANTY" disclaimer below15 * ("Disclaimer") and any redistribution must be conditioned upon16 * including a substantially similar Disclaimer requirement for further17 * binary redistribution.18 * 3. Neither the names of the above-listed copyright holders nor the names19 * of any contributors may be used to endorse or promote products derived20 * from this software without specific prior written permission.21 *22 * Alternatively, this software may be distributed under the terms of the23 * GNU General Public License ("GPL") version 2 as published by the Free24 * Software Foundation.25 *26 * NO WARRANTY27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS33 * 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) ARISING36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE37 * 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/* Define the macro locally since it's different for different class of chips.47 */48#define ID(x) \49 ID2C(x), \50 ID2C(IDIROC(x))51 52static const struct pci_device_id ahd_linux_pci_id_table[] = {53 /* aic7901 based controllers */54 ID(ID_AHA_29320A),55 ID(ID_AHA_29320ALP),56 ID(ID_AHA_29320LPE),57 /* aic7902 based controllers */58 ID(ID_AHA_29320),59 ID(ID_AHA_29320B),60 ID(ID_AHA_29320LP),61 ID(ID_AHA_39320),62 ID(ID_AHA_39320_B),63 ID(ID_AHA_39320A),64 ID(ID_AHA_39320D),65 ID(ID_AHA_39320D_HP),66 ID(ID_AHA_39320D_B),67 ID(ID_AHA_39320D_B_HP),68 /* Generic chip probes for devices we don't know exactly. */69 ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),70 ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),71 ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),72 { 0 }73};74 75MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);76 77static int __maybe_unused78ahd_linux_pci_dev_suspend(struct device *dev)79{80 struct ahd_softc *ahd = dev_get_drvdata(dev);81 int rc;82 83 if ((rc = ahd_suspend(ahd)))84 return rc;85 86 ahd_pci_suspend(ahd);87 88 return rc;89}90 91static int __maybe_unused92ahd_linux_pci_dev_resume(struct device *dev)93{94 struct ahd_softc *ahd = dev_get_drvdata(dev);95 96 ahd_pci_resume(ahd);97 98 ahd_resume(ahd);99 100 return 0;101}102 103static void104ahd_linux_pci_dev_remove(struct pci_dev *pdev)105{106 struct ahd_softc *ahd = pci_get_drvdata(pdev);107 u_long s;108 109 if (ahd->platform_data && ahd->platform_data->host)110 scsi_remove_host(ahd->platform_data->host);111 112 ahd_lock(ahd, &s);113 ahd_intr_enable(ahd, FALSE);114 ahd_unlock(ahd, &s);115 ahd_free(ahd);116}117 118static void119ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)120{121 struct pci_dev *pdev = ahd->dev_softc, *master_pdev;122 unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);123 124 master_pdev = pci_get_slot(pdev->bus, master_devfn);125 if (master_pdev) {126 struct ahd_softc *master = pci_get_drvdata(master_pdev);127 if (master) {128 ahd->flags &= ~AHD_BIOS_ENABLED;129 ahd->flags |= master->flags & AHD_BIOS_ENABLED;130 } else131 printk(KERN_ERR "aic79xx: no multichannel peer found!\n");132 pci_dev_put(master_pdev);133 }134}135 136static int137ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)138{139 char buf[80];140 struct ahd_softc *ahd;141 ahd_dev_softc_t pci;142 const struct ahd_pci_identity *entry;143 char *name;144 int error;145 struct device *dev = &pdev->dev;146 147 pci = pdev;148 entry = ahd_find_pci_device(pci);149 if (entry == NULL)150 return (-ENODEV);151 152 /*153 * Allocate a softc for this card and154 * set it up for attachment by our155 * common detect routine.156 */157 sprintf(buf, "ahd_pci:%d:%d:%d",158 ahd_get_pci_bus(pci),159 ahd_get_pci_slot(pci),160 ahd_get_pci_function(pci));161 name = kstrdup(buf, GFP_ATOMIC);162 if (name == NULL)163 return (-ENOMEM);164 ahd = ahd_alloc(NULL, name);165 if (ahd == NULL)166 return (-ENOMEM);167 if (pci_enable_device(pdev)) {168 ahd_free(ahd);169 return (-ENODEV);170 }171 pci_set_master(pdev);172 173 if (sizeof(dma_addr_t) > 4) {174 const u64 required_mask = dma_get_required_mask(dev);175 176 if (required_mask > DMA_BIT_MASK(39) &&177 dma_set_mask(dev, DMA_BIT_MASK(64)) == 0)178 ahd->flags |= AHD_64BIT_ADDRESSING;179 else if (required_mask > DMA_BIT_MASK(32) &&180 dma_set_mask(dev, DMA_BIT_MASK(39)) == 0)181 ahd->flags |= AHD_39BIT_ADDRESSING;182 else183 dma_set_mask(dev, DMA_BIT_MASK(32));184 } else {185 dma_set_mask(dev, DMA_BIT_MASK(32));186 }187 ahd->dev_softc = pci;188 error = ahd_pci_config(ahd, entry);189 if (error != 0) {190 ahd_free(ahd);191 return (-error);192 }193 194 /*195 * Second Function PCI devices need to inherit some196 * * settings from function 0.197 */198 if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)199 ahd_linux_pci_inherit_flags(ahd);200 201 pci_set_drvdata(pdev, ahd);202 203 ahd_linux_register_host(ahd, &aic79xx_driver_template);204 return (0);205}206 207static SIMPLE_DEV_PM_OPS(ahd_linux_pci_dev_pm_ops,208 ahd_linux_pci_dev_suspend,209 ahd_linux_pci_dev_resume);210 211static struct pci_driver aic79xx_pci_driver = {212 .name = "aic79xx",213 .probe = ahd_linux_pci_dev_probe,214 .driver.pm = &ahd_linux_pci_dev_pm_ops,215 .remove = ahd_linux_pci_dev_remove,216 .id_table = ahd_linux_pci_id_table217};218 219int220ahd_linux_pci_init(void)221{222 return pci_register_driver(&aic79xx_pci_driver);223}224 225void226ahd_linux_pci_exit(void)227{228 pci_unregister_driver(&aic79xx_pci_driver);229}230 231static int232ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,233 resource_size_t *base2)234{235 *base = pci_resource_start(ahd->dev_softc, 0);236 /*237 * This is really the 3rd bar and should be at index 2,238 * but the Linux PCI code doesn't know how to "count" 64bit239 * bars.240 */241 *base2 = pci_resource_start(ahd->dev_softc, 3);242 if (*base == 0 || *base2 == 0)243 return (ENOMEM);244 if (!request_region(*base, 256, "aic79xx"))245 return (ENOMEM);246 if (!request_region(*base2, 256, "aic79xx")) {247 release_region(*base, 256);248 return (ENOMEM);249 }250 return (0);251}252 253static int254ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,255 resource_size_t *bus_addr,256 uint8_t __iomem **maddr)257{258 resource_size_t start;259 resource_size_t base_page;260 u_long base_offset;261 int error = 0;262 263 if (aic79xx_allow_memio == 0)264 return (ENOMEM);265 266 if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)267 return (ENOMEM);268 269 start = pci_resource_start(ahd->dev_softc, 1);270 base_page = start & PAGE_MASK;271 base_offset = start - base_page;272 if (start != 0) {273 *bus_addr = start;274 if (!request_mem_region(start, 0x1000, "aic79xx"))275 error = ENOMEM;276 if (!error) {277 *maddr = ioremap(base_page, base_offset + 512);278 if (*maddr == NULL) {279 error = ENOMEM;280 release_mem_region(start, 0x1000);281 } else282 *maddr += base_offset;283 }284 } else285 error = ENOMEM;286 return (error);287}288 289int290ahd_pci_map_registers(struct ahd_softc *ahd)291{292 uint32_t command;293 resource_size_t base;294 uint8_t __iomem *maddr;295 int error;296 297 /*298 * If its allowed, we prefer memory mapped access.299 */300 command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);301 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);302 base = 0;303 maddr = NULL;304 error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);305 if (error == 0) {306 ahd->platform_data->mem_busaddr = base;307 ahd->tags[0] = BUS_SPACE_MEMIO;308 ahd->bshs[0].maddr = maddr;309 ahd->tags[1] = BUS_SPACE_MEMIO;310 ahd->bshs[1].maddr = maddr + 0x100;311 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,312 command | PCIM_CMD_MEMEN, 4);313 314 if (ahd_pci_test_register_access(ahd) != 0) {315 316 printk("aic79xx: PCI Device %d:%d:%d "317 "failed memory mapped test. Using PIO.\n",318 ahd_get_pci_bus(ahd->dev_softc),319 ahd_get_pci_slot(ahd->dev_softc),320 ahd_get_pci_function(ahd->dev_softc));321 iounmap(maddr);322 release_mem_region(ahd->platform_data->mem_busaddr,323 0x1000);324 ahd->bshs[0].maddr = NULL;325 maddr = NULL;326 } else327 command |= PCIM_CMD_MEMEN;328 } else if (bootverbose) {329 printk("aic79xx: PCI%d:%d:%d MEM region 0x%llx "330 "unavailable. Cannot memory map device.\n",331 ahd_get_pci_bus(ahd->dev_softc),332 ahd_get_pci_slot(ahd->dev_softc),333 ahd_get_pci_function(ahd->dev_softc),334 (unsigned long long)base);335 }336 337 if (maddr == NULL) {338 resource_size_t base2;339 340 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);341 if (error == 0) {342 ahd->tags[0] = BUS_SPACE_PIO;343 ahd->tags[1] = BUS_SPACE_PIO;344 ahd->bshs[0].ioport = (u_long)base;345 ahd->bshs[1].ioport = (u_long)base2;346 command |= PCIM_CMD_PORTEN;347 } else {348 printk("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "349 "0x%llx unavailable. Cannot map device.\n",350 ahd_get_pci_bus(ahd->dev_softc),351 ahd_get_pci_slot(ahd->dev_softc),352 ahd_get_pci_function(ahd->dev_softc),353 (unsigned long long)base,354 (unsigned long long)base2);355 }356 }357 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);358 return (error);359}360 361int362ahd_pci_map_int(struct ahd_softc *ahd)363{364 int error;365 366 error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,367 IRQF_SHARED, "aic79xx", ahd);368 if (!error)369 ahd->platform_data->irq = ahd->dev_softc->irq;370 371 return (-error);372}373 374void375ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)376{377 pci_set_power_state(ahd->dev_softc, new_state);378}379