drivers/scsi/aic7xxx/aic7xxx_osm_pci.c - kernel/msm-4.9 - Gitiles

 /*
  * Linux driver attachment glue for PCI based controllers.
  *
  * Copyright (c) 2000-2001 Adaptec Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions, and the following disclaimer,
  *    without modification.
  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  *    substantially similar to the "NO WARRANTY" disclaimer below
  *    ("Disclaimer") and any redistribution must be conditioned upon
  *    including a substantially similar Disclaimer requirement for further
  *    binary redistribution.
  * 3. Neither the names of the above-listed copyright holders nor the names
  *    of any contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * Alternatively, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  * NO WARRANTY
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGES.
  *
  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#47 $
  */

 #include "aic7xxx_osm.h"
 #include "aic7xxx_pci.h"

 static int	ahc_linux_pci_dev_probe(struct pci_dev *pdev,
 					const struct pci_device_id *ent);
 static int	ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc,
 						u_long *base);
 static int	ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
 						 u_long *bus_addr,
 						 uint8_t __iomem **maddr);
 static void	ahc_linux_pci_dev_remove(struct pci_dev *pdev);

 /* Define the macro locally since it's different for different class of chips.
 */
 #define ID(x)	ID_C(x, PCI_CLASS_STORAGE_SCSI)

 static struct pci_device_id ahc_linux_pci_id_table[] = {
 	/* aic7850 based controllers */
 	ID(ID_AHA_2902_04_10_15_20C_30C),
 	/* aic7860 based controllers */
 	ID(ID_AHA_2930CU),
 	ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK),
 	/* aic7870 based controllers */
 	ID(ID_AHA_2940),
 	ID(ID_AHA_3940),
 	ID(ID_AHA_398X),
 	ID(ID_AHA_2944),
 	ID(ID_AHA_3944),
 	ID(ID_AHA_4944),
 	/* aic7880 based controllers */
 	ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK),
 	ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK),
 	/* aic7890 based controllers */
 	ID(ID_AHA_2930U2),
 	ID(ID_AHA_2940U2B),
 	ID(ID_AHA_2940U2_OEM),
 	ID(ID_AHA_2940U2),
 	ID(ID_AHA_2950U2B),
 	ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK),
 	ID(ID_AAA_131U2),
 	/* aic7890 based controllers */
 	ID(ID_AHA_29160),
 	ID(ID_AHA_29160_CPQ),
 	ID(ID_AHA_29160N),
 	ID(ID_AHA_29160C),
 	ID(ID_AHA_29160B),
 	ID(ID_AHA_19160B),
 	ID(ID_AIC7892_ARO),
 	/* aic7892 based controllers */
 	ID(ID_AHA_2940U_DUAL),
 	ID(ID_AHA_3940AU),
 	ID(ID_AHA_3944AU),
 	ID(ID_AIC7895_ARO),
 	ID(ID_AHA_3950U2B_0),
 	ID(ID_AHA_3950U2B_1),
 	ID(ID_AHA_3950U2D_0),
 	ID(ID_AHA_3950U2D_1),
 	ID(ID_AIC7896_ARO),
 	/* aic7899 based controllers */
 	ID(ID_AHA_3960D),
 	ID(ID_AHA_3960D_CPQ),
 	ID(ID_AIC7899_ARO),
 	/* Generic chip probes for devices we don't know exactly. */
 	ID(ID_AIC7850 & ID_DEV_VENDOR_MASK),
 	ID(ID_AIC7855 & ID_DEV_VENDOR_MASK),
 	ID(ID_AIC7859 & ID_DEV_VENDOR_MASK),
 	ID(ID_AIC7860 & ID_DEV_VENDOR_MASK),
 	ID(ID_AIC7870 & ID_DEV_VENDOR_MASK),
 	ID(ID_AIC7880 & ID_DEV_VENDOR_MASK),
  	ID16(ID_AIC7890 & ID_9005_GENERIC_MASK),
  	ID16(ID_AIC7892 & ID_9005_GENERIC_MASK),
 	ID(ID_AIC7895 & ID_DEV_VENDOR_MASK),
 	ID16(ID_AIC7896 & ID_9005_GENERIC_MASK),
 	ID16(ID_AIC7899 & ID_9005_GENERIC_MASK),
 	ID(ID_AIC7810 & ID_DEV_VENDOR_MASK),
 	ID(ID_AIC7815 & ID_DEV_VENDOR_MASK),
 	{ 0 }
 };

 MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);

 struct pci_driver aic7xxx_pci_driver = {
 	.name		= "aic7xxx",
 	.probe		= ahc_linux_pci_dev_probe,
 	.remove		= ahc_linux_pci_dev_remove,
 	.id_table	= ahc_linux_pci_id_table
 };

 static void
 ahc_linux_pci_dev_remove(struct pci_dev *pdev)
 {
 	struct ahc_softc *ahc;
 	u_long l;

 	/*
 	 * We should be able to just perform
 	 * the free directly, but check our
 	 * list for extra sanity.
 	 */
 	ahc_list_lock(&l);
 	ahc = ahc_find_softc((struct ahc_softc *)pci_get_drvdata(pdev));
 	if (ahc != NULL) {
 		u_long s;

 		TAILQ_REMOVE(&ahc_tailq, ahc, links);
 		ahc_list_unlock(&l);
 		ahc_lock(ahc, &s);
 		ahc_intr_enable(ahc, FALSE);
 		ahc_unlock(ahc, &s);
 		ahc_free(ahc);
 	} else
 		ahc_list_unlock(&l);
 }

 static int
 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	char		 buf[80];
 	const uint64_t	 mask_39bit = 0x7FFFFFFFFFULL;
 	struct		 ahc_softc *ahc;
 	ahc_dev_softc_t	 pci;
 	struct		 ahc_pci_identity *entry;
 	char		*name;
 	int		 error;

 	/*
 	 * Some BIOSen report the same device multiple times.
 	 */
 	TAILQ_FOREACH(ahc, &ahc_tailq, links) {
 		struct pci_dev *probed_pdev;

 		probed_pdev = ahc->dev_softc;
 		if (probed_pdev->bus->number == pdev->bus->number
 		 && probed_pdev->devfn == pdev->devfn)
 			break;
 	}
 	if (ahc != NULL) {
 		/* Skip duplicate. */
 		return (-ENODEV);
 	}

 	pci = pdev;
 	entry = ahc_find_pci_device(pci);
 	if (entry == NULL)
 		return (-ENODEV);

 	/*
 	 * Allocate a softc for this card and
 	 * set it up for attachment by our
 	 * common detect routine.
 	 */
 	sprintf(buf, "ahc_pci:%d:%d:%d",
 		ahc_get_pci_bus(pci),
 		ahc_get_pci_slot(pci),
 		ahc_get_pci_function(pci));
 	name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
 	if (name == NULL)
 		return (-ENOMEM);
 	strcpy(name, buf);
 	ahc = ahc_alloc(NULL, name);
 	if (ahc == NULL)
 		return (-ENOMEM);
 	if (pci_enable_device(pdev)) {
 		ahc_free(ahc);
 		return (-ENODEV);
 	}
 	pci_set_master(pdev);

 	if (sizeof(dma_addr_t) > 4
 	 && ahc_linux_get_memsize() > 0x80000000
 	 && pci_set_dma_mask(pdev, mask_39bit) == 0) {
 		ahc->flags |= AHC_39BIT_ADDRESSING;
 	} else {
 		if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
 			printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
                 	return (-ENODEV);
 		}
 	}
 	ahc->dev_softc = pci;
 	error = ahc_pci_config(ahc, entry);
 	if (error != 0) {
 		ahc_free(ahc);
 		return (-error);
 	}
 	pci_set_drvdata(pdev, ahc);
 	if (aic7xxx_detect_complete)
 		ahc_linux_register_host(ahc, &aic7xxx_driver_template);
 	return (0);
 }

 int
 ahc_linux_pci_init(void)
 {
 	/* Translate error or zero return into zero or one */
 	return pci_module_init(&aic7xxx_pci_driver) ? 0 : 1;
 }

 void
 ahc_linux_pci_exit(void)
 {
 	pci_unregister_driver(&aic7xxx_pci_driver);
 }

 static int
 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
 {
 	if (aic7xxx_allow_memio == 0)
 		return (ENOMEM);

 	*base = pci_resource_start(ahc->dev_softc, 0);
 	if (*base == 0)
 		return (ENOMEM);
 	if (request_region(*base, 256, "aic7xxx") == 0)
 		return (ENOMEM);
 	return (0);
 }

 static int
 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
 				 u_long *bus_addr,
 				 uint8_t __iomem **maddr)
 {
 	u_long	start;
 	int	error;

 	error = 0;
 	start = pci_resource_start(ahc->dev_softc, 1);
 	if (start != 0) {
 		*bus_addr = start;
 		if (request_mem_region(start, 0x1000, "aic7xxx") == 0)
 			error = ENOMEM;
 		if (error == 0) {
 			*maddr = ioremap_nocache(start, 256);
 			if (*maddr == NULL) {
 				error = ENOMEM;
 				release_mem_region(start, 0x1000);
 			}
 		}
 	} else
 		error = ENOMEM;
 	return (error);
 }

 int
 ahc_pci_map_registers(struct ahc_softc *ahc)
 {
 	uint32_t command;
 	u_long	 base;
 	uint8_t	__iomem *maddr;
 	int	 error;

 	/*
 	 * If its allowed, we prefer memory mapped access.
 	 */
 	command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
 	command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 	base = 0;
 	maddr = NULL;
 	error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
 	if (error == 0) {
 		ahc->platform_data->mem_busaddr = base;
 		ahc->tag = BUS_SPACE_MEMIO;
 		ahc->bsh.maddr = maddr;
 		ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
 				     command | PCIM_CMD_MEMEN, 4);

 		/*
 		 * Do a quick test to see if memory mapped
 		 * I/O is functioning correctly.
 		 */
 		if (ahc_pci_test_register_access(ahc) != 0) {

 			printf("aic7xxx: PCI Device %d:%d:%d "
 			       "failed memory mapped test.  Using PIO.\n",
 			       ahc_get_pci_bus(ahc->dev_softc),
 			       ahc_get_pci_slot(ahc->dev_softc),
 			       ahc_get_pci_function(ahc->dev_softc));
 			iounmap(maddr);
 			release_mem_region(ahc->platform_data->mem_busaddr,
 					   0x1000);
 			ahc->bsh.maddr = NULL;
 			maddr = NULL;
 		} else
 			command |= PCIM_CMD_MEMEN;
 	} else {
 		printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
 		       "unavailable. Cannot memory map device.\n",
 		       ahc_get_pci_bus(ahc->dev_softc),
 		       ahc_get_pci_slot(ahc->dev_softc),
 		       ahc_get_pci_function(ahc->dev_softc),
 		       base);
 	}

 	/*
 	 * We always prefer memory mapped access.
 	 */
 	if (maddr == NULL) {

 		error = ahc_linux_pci_reserve_io_region(ahc, &base);
 		if (error == 0) {
 			ahc->tag = BUS_SPACE_PIO;
 			ahc->bsh.ioport = base;
 			command |= PCIM_CMD_PORTEN;
 		} else {
 			printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
 			       "unavailable. Cannot map device.\n",
 			       ahc_get_pci_bus(ahc->dev_softc),
 			       ahc_get_pci_slot(ahc->dev_softc),
 			       ahc_get_pci_function(ahc->dev_softc),
 			       base);
 		}
 	}
 	ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
 	return (error);
 }

 int
 ahc_pci_map_int(struct ahc_softc *ahc)
 {
 	int error;

 	error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
 			    SA_SHIRQ, "aic7xxx", ahc);
 	if (error == 0)
 		ahc->platform_data->irq = ahc->dev_softc->irq;

 	return (-error);
 }
	/*
	* Linux driver attachment glue for PCI based controllers.
	*
	* Copyright (c) 2000-2001 Adaptec Inc.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions, and the following disclaimer,
	* without modification.
	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	* substantially similar to the "NO WARRANTY" disclaimer below
	* ("Disclaimer") and any redistribution must be conditioned upon
	* including a substantially similar Disclaimer requirement for further
	* binary redistribution.
	* 3. Neither the names of the above-listed copyright holders nor the names
	* of any contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* Alternatively, this software may be distributed under the terms of the
	* GNU General Public License ("GPL") version 2 as published by the Free
	* Software Foundation.
	*
	* NO WARRANTY
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	* POSSIBILITY OF SUCH DAMAGES.
	*
	* $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#47 $
	*/

	#include "aic7xxx_osm.h"
	#include "aic7xxx_pci.h"

	static int ahc_linux_pci_dev_probe(struct pci_dev *pdev,
	const struct pci_device_id *ent);
	static int ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc,
	u_long *base);
	static int ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
	u_long *bus_addr,
	uint8_t __iomem **maddr);
	static void ahc_linux_pci_dev_remove(struct pci_dev *pdev);

	/* Define the macro locally since it's different for different class of chips.
	*/
	#define ID(x) ID_C(x, PCI_CLASS_STORAGE_SCSI)

	static struct pci_device_id ahc_linux_pci_id_table[] = {
	/* aic7850 based controllers */
	ID(ID_AHA_2902_04_10_15_20C_30C),
	/* aic7860 based controllers */
	ID(ID_AHA_2930CU),
	ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK),
	/* aic7870 based controllers */
	ID(ID_AHA_2940),
	ID(ID_AHA_3940),
	ID(ID_AHA_398X),
	ID(ID_AHA_2944),
	ID(ID_AHA_3944),
	ID(ID_AHA_4944),
	/* aic7880 based controllers */
	ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK),
	ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK),
	/* aic7890 based controllers */
	ID(ID_AHA_2930U2),
	ID(ID_AHA_2940U2B),
	ID(ID_AHA_2940U2_OEM),
	ID(ID_AHA_2940U2),
	ID(ID_AHA_2950U2B),
	ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK),
	ID(ID_AAA_131U2),
	/* aic7890 based controllers */
	ID(ID_AHA_29160),
	ID(ID_AHA_29160_CPQ),
	ID(ID_AHA_29160N),
	ID(ID_AHA_29160C),
	ID(ID_AHA_29160B),
	ID(ID_AHA_19160B),
	ID(ID_AIC7892_ARO),
	/* aic7892 based controllers */
	ID(ID_AHA_2940U_DUAL),
	ID(ID_AHA_3940AU),
	ID(ID_AHA_3944AU),
	ID(ID_AIC7895_ARO),
	ID(ID_AHA_3950U2B_0),
	ID(ID_AHA_3950U2B_1),
	ID(ID_AHA_3950U2D_0),
	ID(ID_AHA_3950U2D_1),
	ID(ID_AIC7896_ARO),
	/* aic7899 based controllers */
	ID(ID_AHA_3960D),
	ID(ID_AHA_3960D_CPQ),
	ID(ID_AIC7899_ARO),
	/* Generic chip probes for devices we don't know exactly. */
	ID(ID_AIC7850 & ID_DEV_VENDOR_MASK),
	ID(ID_AIC7855 & ID_DEV_VENDOR_MASK),
	ID(ID_AIC7859 & ID_DEV_VENDOR_MASK),
	ID(ID_AIC7860 & ID_DEV_VENDOR_MASK),
	ID(ID_AIC7870 & ID_DEV_VENDOR_MASK),
	ID(ID_AIC7880 & ID_DEV_VENDOR_MASK),
	ID16(ID_AIC7890 & ID_9005_GENERIC_MASK),
	ID16(ID_AIC7892 & ID_9005_GENERIC_MASK),
	ID(ID_AIC7895 & ID_DEV_VENDOR_MASK),
	ID16(ID_AIC7896 & ID_9005_GENERIC_MASK),
	ID16(ID_AIC7899 & ID_9005_GENERIC_MASK),
	ID(ID_AIC7810 & ID_DEV_VENDOR_MASK),
	ID(ID_AIC7815 & ID_DEV_VENDOR_MASK),
	{ 0 }
	};

	MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);

	struct pci_driver aic7xxx_pci_driver = {
	.name = "aic7xxx",
	.probe = ahc_linux_pci_dev_probe,
	.remove = ahc_linux_pci_dev_remove,
	.id_table = ahc_linux_pci_id_table
	};

	static void
	ahc_linux_pci_dev_remove(struct pci_dev *pdev)
	{
	struct ahc_softc *ahc;
	u_long l;

	/*
	* We should be able to just perform
	* the free directly, but check our
	* list for extra sanity.
	*/
	ahc_list_lock(&l);
	ahc = ahc_find_softc((struct ahc_softc *)pci_get_drvdata(pdev));
	if (ahc != NULL) {
	u_long s;

	TAILQ_REMOVE(&ahc_tailq, ahc, links);
	ahc_list_unlock(&l);
	ahc_lock(ahc, &s);
	ahc_intr_enable(ahc, FALSE);
	ahc_unlock(ahc, &s);
	ahc_free(ahc);
	} else
	ahc_list_unlock(&l);
	}

	static int
	ahc_linux_pci_dev_probe(struct pci_dev pdev, const struct pci_device_id ent)
	{
	char buf[80];
	const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
	struct ahc_softc *ahc;
	ahc_dev_softc_t pci;
	struct ahc_pci_identity *entry;
	char *name;
	int error;

	/*
	* Some BIOSen report the same device multiple times.
	*/
	TAILQ_FOREACH(ahc, &ahc_tailq, links) {
	struct pci_dev *probed_pdev;

	probed_pdev = ahc->dev_softc;
	if (probed_pdev->bus->number == pdev->bus->number
	&& probed_pdev->devfn == pdev->devfn)
	break;
	}
	if (ahc != NULL) {
	/* Skip duplicate. */
	return (-ENODEV);
	}

	pci = pdev;
	entry = ahc_find_pci_device(pci);
	if (entry == NULL)
	return (-ENODEV);

	/*
	* Allocate a softc for this card and
	* set it up for attachment by our
	* common detect routine.
	*/
	sprintf(buf, "ahc_pci:%d:%d:%d",
	ahc_get_pci_bus(pci),
	ahc_get_pci_slot(pci),
	ahc_get_pci_function(pci));
	name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
	if (name == NULL)
	return (-ENOMEM);
	strcpy(name, buf);
	ahc = ahc_alloc(NULL, name);
	if (ahc == NULL)
	return (-ENOMEM);
	if (pci_enable_device(pdev)) {
	ahc_free(ahc);
	return (-ENODEV);
	}
	pci_set_master(pdev);

	if (sizeof(dma_addr_t) > 4
	&& ahc_linux_get_memsize() > 0x80000000
	&& pci_set_dma_mask(pdev, mask_39bit) == 0) {
	ahc->flags \|= AHC_39BIT_ADDRESSING;
	} else {
	if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
	printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
	return (-ENODEV);
	}
	}
	ahc->dev_softc = pci;
	error = ahc_pci_config(ahc, entry);
	if (error != 0) {
	ahc_free(ahc);
	return (-error);
	}
	pci_set_drvdata(pdev, ahc);
	if (aic7xxx_detect_complete)
	ahc_linux_register_host(ahc, &aic7xxx_driver_template);
	return (0);
	}

	int
	ahc_linux_pci_init(void)
	{
	/* Translate error or zero return into zero or one */
	return pci_module_init(&aic7xxx_pci_driver) ? 0 : 1;
	}

	void
	ahc_linux_pci_exit(void)
	{
	pci_unregister_driver(&aic7xxx_pci_driver);
	}

	static int
	ahc_linux_pci_reserve_io_region(struct ahc_softc ahc, u_long base)
	{
	if (aic7xxx_allow_memio == 0)
	return (ENOMEM);

	*base = pci_resource_start(ahc->dev_softc, 0);
	if (*base == 0)
	return (ENOMEM);
	if (request_region(*base, 256, "aic7xxx") == 0)
	return (ENOMEM);
	return (0);
	}

	static int
	ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
	u_long *bus_addr,
	uint8_t __iomem **maddr)
	{
	u_long start;
	int error;

	error = 0;
	start = pci_resource_start(ahc->dev_softc, 1);
	if (start != 0) {
	*bus_addr = start;
	if (request_mem_region(start, 0x1000, "aic7xxx") == 0)
	error = ENOMEM;
	if (error == 0) {
	*maddr = ioremap_nocache(start, 256);
	if (*maddr == NULL) {
	error = ENOMEM;
	release_mem_region(start, 0x1000);
	}
	}
	} else
	error = ENOMEM;
	return (error);
	}

	int
	ahc_pci_map_registers(struct ahc_softc *ahc)
	{
	uint32_t command;
	u_long base;
	uint8_t __iomem *maddr;
	int error;

	/*
	* If its allowed, we prefer memory mapped access.
	*/
	command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
	command &= ~(PCIM_CMD_PORTEN\|PCIM_CMD_MEMEN);
	base = 0;
	maddr = NULL;
	error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
	if (error == 0) {
	ahc->platform_data->mem_busaddr = base;
	ahc->tag = BUS_SPACE_MEMIO;
	ahc->bsh.maddr = maddr;
	ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
	command \| PCIM_CMD_MEMEN, 4);

	/*
	* Do a quick test to see if memory mapped
	* I/O is functioning correctly.
	*/
	if (ahc_pci_test_register_access(ahc) != 0) {

	printf("aic7xxx: PCI Device %d:%d:%d "
	"failed memory mapped test. Using PIO.\n",
	ahc_get_pci_bus(ahc->dev_softc),
	ahc_get_pci_slot(ahc->dev_softc),
	ahc_get_pci_function(ahc->dev_softc));
	iounmap(maddr);
	release_mem_region(ahc->platform_data->mem_busaddr,
	0x1000);
	ahc->bsh.maddr = NULL;
	maddr = NULL;
	} else
	command \|= PCIM_CMD_MEMEN;
	} else {
	printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
	"unavailable. Cannot memory map device.\n",
	ahc_get_pci_bus(ahc->dev_softc),
	ahc_get_pci_slot(ahc->dev_softc),
	ahc_get_pci_function(ahc->dev_softc),
	base);
	}

	/*
	* We always prefer memory mapped access.
	*/
	if (maddr == NULL) {

	error = ahc_linux_pci_reserve_io_region(ahc, &base);
	if (error == 0) {
	ahc->tag = BUS_SPACE_PIO;
	ahc->bsh.ioport = base;
	command \|= PCIM_CMD_PORTEN;
	} else {
	printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
	"unavailable. Cannot map device.\n",
	ahc_get_pci_bus(ahc->dev_softc),
	ahc_get_pci_slot(ahc->dev_softc),
	ahc_get_pci_function(ahc->dev_softc),
	base);
	}
	}
	ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
	return (error);
	}

	int
	ahc_pci_map_int(struct ahc_softc *ahc)
	{
	int error;

	error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
	SA_SHIRQ, "aic7xxx", ahc);
	if (error == 0)
	ahc->platform_data->irq = ahc->dev_softc->irq;

	return (-error);
	}