[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / aic7xxx / aic79xx_osm_pci.c

/*
 * Linux driver attachment glue for PCI based U320 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/aic79xx_osm_pci.c#25 $
 */

#include "aic79xx_osm.h"
#include "aic79xx_inline.h"
#include "aic79xx_pci.h"

static int	ahd_linux_pci_dev_probe(struct pci_dev *pdev,
					const struct pci_device_id *ent);
static int	ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd,
						 u_long *base, u_long *base2);
static int	ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
						 u_long *bus_addr,
						 uint8_t __iomem **maddr);
static void	ahd_linux_pci_dev_remove(struct pci_dev *pdev);

/* Define the macro locally since it's different for different class of chips.
 */
#define ID(x)            \
	ID2C(x),         \
	ID2C(IDIROC(x))

static struct pci_device_id ahd_linux_pci_id_table[] = {
	/* aic7901 based controllers */
	ID(ID_AHA_29320A),
	ID(ID_AHA_29320ALP),
	/* aic7902 based controllers */
	ID(ID_AHA_29320),
	ID(ID_AHA_29320B),
	ID(ID_AHA_29320LP),
	ID(ID_AHA_39320),
	ID(ID_AHA_39320_B),
	ID(ID_AHA_39320A),
	ID(ID_AHA_39320D),
	ID(ID_AHA_39320D_HP),
	ID(ID_AHA_39320D_B),
	ID(ID_AHA_39320D_B_HP),
	/* Generic chip probes for devices we don't know exactly. */
	ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
	ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
	ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
	{ 0 }
};

MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);

struct pci_driver aic79xx_pci_driver = {
	.name		= "aic79xx",
	.probe		= ahd_linux_pci_dev_probe,
	.remove		= ahd_linux_pci_dev_remove,
	.id_table	= ahd_linux_pci_id_table
};

static void
ahd_linux_pci_dev_remove(struct pci_dev *pdev)
{
	struct ahd_softc *ahd = pci_get_drvdata(pdev);
	u_long s;

	ahd_lock(ahd, &s);
	ahd_intr_enable(ahd, FALSE);
	ahd_unlock(ahd, &s);
	ahd_free(ahd);
}

static void
ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
{
	struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
	unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);

	master_pdev = pci_get_slot(pdev->bus, master_devfn);
	if (master_pdev) {
		struct ahd_softc *master = pci_get_drvdata(master_pdev);
		if (master) {
			ahd->flags &= ~AHD_BIOS_ENABLED;
			ahd->flags |= master->flags & AHD_BIOS_ENABLED;
		} else
			printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
		pci_dev_put(master_pdev);
	}
}

static int
ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	char		 buf[80];
	struct		 ahd_softc *ahd;
	ahd_dev_softc_t	 pci;
	struct		 ahd_pci_identity *entry;
	char		*name;
	int		 error;

	pci = pdev;
	entry = ahd_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, "ahd_pci:%d:%d:%d",
		ahd_get_pci_bus(pci),
		ahd_get_pci_slot(pci),
		ahd_get_pci_function(pci));
	name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
	if (name == NULL)
		return (-ENOMEM);
	strcpy(name, buf);
	ahd = ahd_alloc(NULL, name);
	if (ahd == NULL)
		return (-ENOMEM);
	if (pci_enable_device(pdev)) {
		ahd_free(ahd);
		return (-ENODEV);
	}
	pci_set_master(pdev);

	if (sizeof(dma_addr_t) > 4) {
		uint64_t   memsize;
		const uint64_t mask_39bit = 0x7FFFFFFFFFULL;

		memsize = ahd_linux_get_memsize();

		if (memsize >= 0x8000000000ULL
	 	 && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
			ahd->flags |= AHD_64BIT_ADDRESSING;
		} else if (memsize > 0x80000000
			&& pci_set_dma_mask(pdev, mask_39bit) == 0) {
			ahd->flags |= AHD_39BIT_ADDRESSING;
		}
	} else {
		pci_set_dma_mask(pdev, DMA_32BIT_MASK);
	}
	ahd->dev_softc = pci;
	error = ahd_pci_config(ahd, entry);
	if (error != 0) {
		ahd_free(ahd);
		return (-error);
	}

	/*
	 * Second Function PCI devices need to inherit some
	 * * settings from function 0.
	 */
	if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
		ahd_linux_pci_inherit_flags(ahd);

	pci_set_drvdata(pdev, ahd);

	ahd_linux_register_host(ahd, &aic79xx_driver_template);
	return (0);
}

int
ahd_linux_pci_init(void)
{
	return (pci_module_init(&aic79xx_pci_driver));
}

void
ahd_linux_pci_exit(void)
{
	pci_unregister_driver(&aic79xx_pci_driver);
}

static int
ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
				 u_long *base2)
{
	*base = pci_resource_start(ahd->dev_softc, 0);
	/*
	 * This is really the 3rd bar and should be at index 2,
	 * but the Linux PCI code doesn't know how to "count" 64bit
	 * bars.
	 */
	*base2 = pci_resource_start(ahd->dev_softc, 3);
	if (*base == 0 || *base2 == 0)
		return (ENOMEM);
	if (request_region(*base, 256, "aic79xx") == 0)
		return (ENOMEM);
	if (request_region(*base2, 256, "aic79xx") == 0) {
		release_region(*base2, 256);
		return (ENOMEM);
	}
	return (0);
}

static int
ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
				 u_long *bus_addr,
				 uint8_t __iomem **maddr)
{
	u_long	start;
	u_long	base_page;
	u_long	base_offset;
	int	error;

	if (aic79xx_allow_memio == 0)
		return (ENOMEM);

	if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
		return (ENOMEM);

	error = 0;
	start = pci_resource_start(ahd->dev_softc, 1);
	base_page = start & PAGE_MASK;
	base_offset = start - base_page;
	if (start != 0) {
		*bus_addr = start;
		if (request_mem_region(start, 0x1000, "aic79xx") == 0)
			error = ENOMEM;
		if (error == 0) {
			*maddr = ioremap_nocache(base_page, base_offset + 256);
			if (*maddr == NULL) {
				error = ENOMEM;
				release_mem_region(start, 0x1000);
			} else
				*maddr += base_offset;
		}
	} else
		error = ENOMEM;
	return (error);
}

int
ahd_pci_map_registers(struct ahd_softc *ahd)
{
	uint32_t command;
	u_long	 base;
	uint8_t	__iomem *maddr;
	int	 error;

	/*
	 * If its allowed, we prefer memory mapped access.
	 */
	command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
	command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
	base = 0;
	maddr = NULL;
	error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
	if (error == 0) {
		ahd->platform_data->mem_busaddr = base;
		ahd->tags[0] = BUS_SPACE_MEMIO;
		ahd->bshs[0].maddr = maddr;
		ahd->tags[1] = BUS_SPACE_MEMIO;
		ahd->bshs[1].maddr = maddr + 0x100;
		ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
				     command | PCIM_CMD_MEMEN, 4);

		if (ahd_pci_test_register_access(ahd) != 0) {

			printf("aic79xx: PCI Device %d:%d:%d "
			       "failed memory mapped test.  Using PIO.\n",
			       ahd_get_pci_bus(ahd->dev_softc),
			       ahd_get_pci_slot(ahd->dev_softc),
			       ahd_get_pci_function(ahd->dev_softc));
			iounmap(maddr);
			release_mem_region(ahd->platform_data->mem_busaddr,
					   0x1000);
			ahd->bshs[0].maddr = NULL;
			maddr = NULL;
		} else
			command |= PCIM_CMD_MEMEN;
	} else if (bootverbose) {
		printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
		       "unavailable. Cannot memory map device.\n",
		       ahd_get_pci_bus(ahd->dev_softc),
		       ahd_get_pci_slot(ahd->dev_softc),
		       ahd_get_pci_function(ahd->dev_softc),
		       base);
	}

	if (maddr == NULL) {
		u_long	 base2;

		error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
		if (error == 0) {
			ahd->tags[0] = BUS_SPACE_PIO;
			ahd->tags[1] = BUS_SPACE_PIO;
			ahd->bshs[0].ioport = base;
			ahd->bshs[1].ioport = base2;
			command |= PCIM_CMD_PORTEN;
		} else {
			printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
			       "unavailable. Cannot map device.\n",
			       ahd_get_pci_bus(ahd->dev_softc),
			       ahd_get_pci_slot(ahd->dev_softc),
			       ahd_get_pci_function(ahd->dev_softc),
			       base, base2);
		}
	}
	ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
	return (error);
}

int
ahd_pci_map_int(struct ahd_softc *ahd)
{
	int error;

	error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
			    SA_SHIRQ, "aic79xx", ahd);
	if (error == 0)
		ahd->platform_data->irq = ahd->dev_softc->irq;
	
	return (-error);
}

void
ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
{
	pci_set_power_state(ahd->dev_softc, new_state);
}
Commit	Line	Data
1da177e4 LT	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	{
85a46523 CH	95	struct ahd_softc *ahd = pci_get_drvdata(pdev);
85a46523 CH	96	u_long s;
1da177e4	97
85a46523 CH	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	}
1da177e4 LT	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
1da177e4 LT	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;
1da177e4 LT	168	} else if (memsize > 0x80000000
	169	&& pci_set_dma_mask(pdev, mask_39bit) == 0) {
	170	ahd->flags \|= AHD_39BIT_ADDRESSING;
1da177e4 LT	171	}
	172	} else {
	173	pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1da177e4 LT	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	}
85a46523 CH	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
1da177e4	189	pci_set_drvdata(pdev, ahd);
85a46523 CH	190
85a46523 CH	191	ahd_linux_register_host(ahd, &aic79xx_driver_template);
1da177e4 LT	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	}