[mirror_ubuntu-bionic-kernel.git] / drivers / message / i2o / pci.c

/*
 *	PCI handling of I2O controller
 *
 * 	Copyright (C) 1999-2002	Red Hat Software
 *
 *	Written by Alan Cox, Building Number Three Ltd
 *
 *	This program is free software; you can redistribute it and/or modify it
 *	under the terms of the GNU General Public License as published by the
 *	Free Software Foundation; either version 2 of the License, or (at your
 *	option) any later version.
 *
 *	A lot of the I2O message side code from this is taken from the Red
 *	Creek RCPCI45 adapter driver by Red Creek Communications
 *
 *	Fixes/additions:
 *		Philipp Rumpf
 *		Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI>
 *		Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
 *		Deepak Saxena <deepak@plexity.net>
 *		Boji T Kannanthanam <boji.t.kannanthanam@intel.com>
 *		Alan Cox <alan@redhat.com>:
 *			Ported to Linux 2.5.
 *		Markus Lidel <Markus.Lidel@shadowconnect.com>:
 *			Minor fixes for 2.6.
 *		Markus Lidel <Markus.Lidel@shadowconnect.com>:
 *			Support for sysfs included.
 */

#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/i2o.h>
#include "core.h"

#define OSM_DESCRIPTION	"I2O-subsystem"

/* PCI device id table for all I2O controllers */
static struct pci_device_id __devinitdata i2o_pci_ids[] = {
	{PCI_DEVICE_CLASS(PCI_CLASS_INTELLIGENT_I2O << 8, 0xffff00)},
	{PCI_DEVICE(PCI_VENDOR_ID_DPT, 0xa511)},
	{.vendor = PCI_VENDOR_ID_INTEL,.device = 0x1962,
	 .subvendor = PCI_VENDOR_ID_PROMISE,.subdevice = PCI_ANY_ID},
	{0}
};

/**
 *	i2o_pci_free - Frees the DMA memory for the I2O controller
 *	@c: I2O controller to free
 *
 *	Remove all allocated DMA memory and unmap memory IO regions. If MTRR
 *	is enabled, also remove it again.
 */
static void i2o_pci_free(struct i2o_controller *c)
{
	struct device *dev;

	dev = &c->pdev->dev;

	i2o_dma_free(dev, &c->out_queue);
	i2o_dma_free(dev, &c->status_block);
	kfree(c->lct);
	i2o_dma_free(dev, &c->dlct);
	i2o_dma_free(dev, &c->hrt);
	i2o_dma_free(dev, &c->status);

	if (c->raptor && c->in_queue.virt)
		iounmap(c->in_queue.virt);

	if (c->base.virt)
		iounmap(c->base.virt);

	pci_release_regions(c->pdev);
}

/**
 *	i2o_pci_alloc - Allocate DMA memory, map IO memory for I2O controller
 *	@c: I2O controller
 *
 *	Allocate DMA memory for a PCI (or in theory AGP) I2O controller. All
 *	IO mappings are also done here. If MTRR is enabled, also do add memory
 *	regions here.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int __devinit i2o_pci_alloc(struct i2o_controller *c)
{
	struct pci_dev *pdev = c->pdev;
	struct device *dev = &pdev->dev;
	int i;

	if (pci_request_regions(pdev, OSM_DESCRIPTION)) {
		printk(KERN_ERR "%s: device already claimed\n", c->name);
		return -ENODEV;
	}

	for (i = 0; i < 6; i++) {
		/* Skip I/O spaces */
		if (!(pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
			if (!c->base.phys) {
				c->base.phys = pci_resource_start(pdev, i);
				c->base.len = pci_resource_len(pdev, i);

				/*
				 * If we know what card it is, set the size
				 * correctly. Code is taken from dpt_i2o.c
				 */
				if (pdev->device == 0xa501) {
					if (pdev->subsystem_device >= 0xc032 &&
					    pdev->subsystem_device <= 0xc03b) {
						if (c->base.len > 0x400000)
							c->base.len = 0x400000;
					} else {
						if (c->base.len > 0x100000)
							c->base.len = 0x100000;
					}
				}
				if (!c->raptor)
					break;
			} else {
				c->in_queue.phys = pci_resource_start(pdev, i);
				c->in_queue.len = pci_resource_len(pdev, i);
				break;
			}
		}
	}

	if (i == 6) {
		printk(KERN_ERR "%s: I2O controller has no memory regions"
		       " defined.\n", c->name);
		i2o_pci_free(c);
		return -EINVAL;
	}

	/* Map the I2O controller */
	if (c->raptor) {
		printk(KERN_INFO "%s: PCI I2O controller\n", c->name);
		printk(KERN_INFO "     BAR0 at 0x%08lX size=%ld\n",
		       (unsigned long)c->base.phys, (unsigned long)c->base.len);
		printk(KERN_INFO "     BAR1 at 0x%08lX size=%ld\n",
		       (unsigned long)c->in_queue.phys,
		       (unsigned long)c->in_queue.len);
	} else
		printk(KERN_INFO "%s: PCI I2O controller at %08lX size=%ld\n",
		       c->name, (unsigned long)c->base.phys,
		       (unsigned long)c->base.len);

	c->base.virt = ioremap_nocache(c->base.phys, c->base.len);
	if (!c->base.virt) {
		printk(KERN_ERR "%s: Unable to map controller.\n", c->name);
		i2o_pci_free(c);
		return -ENOMEM;
	}

	if (c->raptor) {
		c->in_queue.virt =
		    ioremap_nocache(c->in_queue.phys, c->in_queue.len);
		if (!c->in_queue.virt) {
			printk(KERN_ERR "%s: Unable to map controller.\n",
			       c->name);
			i2o_pci_free(c);
			return -ENOMEM;
		}
	} else
		c->in_queue = c->base;

	c->irq_status = c->base.virt + I2O_IRQ_STATUS;
	c->irq_mask = c->base.virt + I2O_IRQ_MASK;
	c->in_port = c->base.virt + I2O_IN_PORT;
	c->out_port = c->base.virt + I2O_OUT_PORT;

	/* Motorola/Freescale chip does not follow spec */
	if (pdev->vendor == PCI_VENDOR_ID_MOTOROLA && pdev->device == 0x18c0) {
		/* Check if CPU is enabled */
		if (be32_to_cpu(readl(c->base.virt + 0x10000)) & 0x10000000) {
			printk(KERN_INFO "%s: MPC82XX needs CPU running to "
			       "service I2O.\n", c->name);
			i2o_pci_free(c);
			return -ENODEV;
		} else {
			c->irq_status += I2O_MOTOROLA_PORT_OFFSET;
			c->irq_mask += I2O_MOTOROLA_PORT_OFFSET;
			c->in_port += I2O_MOTOROLA_PORT_OFFSET;
			c->out_port += I2O_MOTOROLA_PORT_OFFSET;
			printk(KERN_INFO "%s: MPC82XX workarounds activated.\n",
			       c->name);
		}
	}

	if (i2o_dma_alloc(dev, &c->status, 8, GFP_KERNEL)) {
		i2o_pci_free(c);
		return -ENOMEM;
	}

	if (i2o_dma_alloc(dev, &c->hrt, sizeof(i2o_hrt), GFP_KERNEL)) {
		i2o_pci_free(c);
		return -ENOMEM;
	}

	if (i2o_dma_alloc(dev, &c->dlct, 8192, GFP_KERNEL)) {
		i2o_pci_free(c);
		return -ENOMEM;
	}

	if (i2o_dma_alloc(dev, &c->status_block, sizeof(i2o_status_block),
			  GFP_KERNEL)) {
		i2o_pci_free(c);
		return -ENOMEM;
	}

	if (i2o_dma_alloc
	    (dev, &c->out_queue,
	     I2O_MAX_OUTBOUND_MSG_FRAMES * I2O_OUTBOUND_MSG_FRAME_SIZE *
	     sizeof(u32), GFP_KERNEL)) {
		i2o_pci_free(c);
		return -ENOMEM;
	}

	pci_set_drvdata(pdev, c);

	return 0;
}

/**
 *	i2o_pci_interrupt - Interrupt handler for I2O controller
 *	@irq: interrupt line
 *	@dev_id: pointer to the I2O controller
 *
 *	Handle an interrupt from a PCI based I2O controller. This turns out
 *	to be rather simple. We keep the controller pointer in the cookie.
 */
static irqreturn_t i2o_pci_interrupt(int irq, void *dev_id)
{
	struct i2o_controller *c = dev_id;
	u32 m;
	irqreturn_t rc = IRQ_NONE;

	while (readl(c->irq_status) & I2O_IRQ_OUTBOUND_POST) {
		m = readl(c->out_port);
		if (m == I2O_QUEUE_EMPTY) {
			/*
			 * Old 960 steppings had a bug in the I2O unit that
			 * caused the queue to appear empty when it wasn't.
			 */
			m = readl(c->out_port);
			if (unlikely(m == I2O_QUEUE_EMPTY))
				break;
		}

		/* dispatch it */
		if (i2o_driver_dispatch(c, m))
			/* flush it if result != 0 */
			i2o_flush_reply(c, m);

		rc = IRQ_HANDLED;
	}

	return rc;
}

/**
 *	i2o_pci_irq_enable - Allocate interrupt for I2O controller
 *	@c: i2o_controller that the request is for
 *
 *	Allocate an interrupt for the I2O controller, and activate interrupts
 *	on the I2O controller.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int i2o_pci_irq_enable(struct i2o_controller *c)
{
	struct pci_dev *pdev = c->pdev;
	int rc;

	writel(0xffffffff, c->irq_mask);

	if (pdev->irq) {
		rc = request_irq(pdev->irq, i2o_pci_interrupt, IRQF_SHARED,
				 c->name, c);
		if (rc < 0) {
			printk(KERN_ERR "%s: unable to allocate interrupt %d."
			       "\n", c->name, pdev->irq);
			return rc;
		}
	}

	writel(0x00000000, c->irq_mask);

	printk(KERN_INFO "%s: Installed at IRQ %d\n", c->name, pdev->irq);

	return 0;
}

/**
 *	i2o_pci_irq_disable - Free interrupt for I2O controller
 *	@c: I2O controller
 *
 *	Disable interrupts in I2O controller and then free interrupt.
 */
static void i2o_pci_irq_disable(struct i2o_controller *c)
{
	writel(0xffffffff, c->irq_mask);

	if (c->pdev->irq > 0)
		free_irq(c->pdev->irq, c);
}

/**
 *	i2o_pci_probe - Probe the PCI device for an I2O controller
 *	@pdev: PCI device to test
 *	@id: id which matched with the PCI device id table
 *
 *	Probe the PCI device for any device which is a memory of the
 *	Intelligent, I2O class or an Adaptec Zero Channel Controller. We
 *	attempt to set up each such device and register it with the core.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int __devinit i2o_pci_probe(struct pci_dev *pdev,
				   const struct pci_device_id *id)
{
	struct i2o_controller *c;
	int rc;
	struct pci_dev *i960 = NULL;

	printk(KERN_INFO "i2o: Checking for PCI I2O controllers...\n");

	if ((pdev->class & 0xff) > 1) {
		printk(KERN_WARNING "i2o: %s does not support I2O 1.5 "
		       "(skipping).\n", pci_name(pdev));
		return -ENODEV;
	}

	if ((rc = pci_enable_device(pdev))) {
		printk(KERN_WARNING "i2o: couldn't enable device %s\n",
		       pci_name(pdev));
		return rc;
	}

	if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
		printk(KERN_WARNING "i2o: no suitable DMA found for %s\n",
		       pci_name(pdev));
		rc = -ENODEV;
		goto disable;
	}

	pci_set_master(pdev);

	c = i2o_iop_alloc();
	if (IS_ERR(c)) {
		printk(KERN_ERR "i2o: couldn't allocate memory for %s\n",
		       pci_name(pdev));
		rc = PTR_ERR(c);
		goto disable;
	} else
		printk(KERN_INFO "%s: controller found (%s)\n", c->name,
		       pci_name(pdev));

	c->pdev = pdev;
	c->device.parent = &pdev->dev;

	/* Cards that fall apart if you hit them with large I/O loads... */
	if (pdev->vendor == PCI_VENDOR_ID_NCR && pdev->device == 0x0630) {
		c->short_req = 1;
		printk(KERN_INFO "%s: Symbios FC920 workarounds activated.\n",
		       c->name);
	}

	if (pdev->subsystem_vendor == PCI_VENDOR_ID_PROMISE) {
		/*
		 * Expose the ship behind i960 for initialization, or it will
		 * failed
		 */
		i960 = pci_get_slot(c->pdev->bus,
				  PCI_DEVFN(PCI_SLOT(c->pdev->devfn), 0));

		if (i960) {
			pci_write_config_word(i960, 0x42, 0);
			pci_dev_put(i960);
		}

		c->promise = 1;
		c->limit_sectors = 1;
	}

	if (pdev->subsystem_vendor == PCI_VENDOR_ID_DPT)
		c->adaptec = 1;

	/* Cards that go bananas if you quiesce them before you reset them. */
	if (pdev->vendor == PCI_VENDOR_ID_DPT) {
		c->no_quiesce = 1;
		if (pdev->device == 0xa511)
			c->raptor = 1;

		if (pdev->subsystem_device == 0xc05a) {
			c->limit_sectors = 1;
			printk(KERN_INFO
			       "%s: limit sectors per request to %d\n", c->name,
			       I2O_MAX_SECTORS_LIMITED);
		}
#ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
		if (sizeof(dma_addr_t) > 4) {
			if (pci_set_dma_mask(pdev, DMA_64BIT_MASK))
				printk(KERN_INFO "%s: 64-bit DMA unavailable\n",
				       c->name);
			else {
				c->pae_support = 1;
				printk(KERN_INFO "%s: using 64-bit DMA\n",
				       c->name);
			}
		}
#endif
	}

	if ((rc = i2o_pci_alloc(c))) {
		printk(KERN_ERR "%s: DMA / IO allocation for I2O controller "
		       "failed\n", c->name);
		goto free_controller;
	}

	if (i2o_pci_irq_enable(c)) {
		printk(KERN_ERR "%s: unable to enable interrupts for I2O "
		       "controller\n", c->name);
		goto free_pci;
	}

	if ((rc = i2o_iop_add(c)))
		goto uninstall;

	if (i960)
		pci_write_config_word(i960, 0x42, 0x03ff);

	return 0;

      uninstall:
	i2o_pci_irq_disable(c);

      free_pci:
	i2o_pci_free(c);

      free_controller:
	i2o_iop_free(c);

      disable:
	pci_disable_device(pdev);

	return rc;
}

/**
 *	i2o_pci_remove - Removes a I2O controller from the system
 *	@pdev: I2O controller which should be removed
 *
 *	Reset the I2O controller, disable interrupts and remove all allocated
 *	resources.
 */
static void __devexit i2o_pci_remove(struct pci_dev *pdev)
{
	struct i2o_controller *c;
	c = pci_get_drvdata(pdev);

	i2o_iop_remove(c);
	i2o_pci_irq_disable(c);
	i2o_pci_free(c);

	pci_disable_device(pdev);

	printk(KERN_INFO "%s: Controller removed.\n", c->name);

	put_device(&c->device);
};

/* PCI driver for I2O controller */
static struct pci_driver i2o_pci_driver = {
	.name = "PCI_I2O",
	.id_table = i2o_pci_ids,
	.probe = i2o_pci_probe,
	.remove = __devexit_p(i2o_pci_remove),
};

/**
 *	i2o_pci_init - registers I2O PCI driver in PCI subsystem
 *
 *	Returns > 0 on success or negative error code on failure.
 */
int __init i2o_pci_init(void)
{
	return pci_register_driver(&i2o_pci_driver);
};

/**
 *	i2o_pci_exit - unregisters I2O PCI driver from PCI subsystem
 */
void __exit i2o_pci_exit(void)
{
	pci_unregister_driver(&i2o_pci_driver);
};

MODULE_DEVICE_TABLE(pci, i2o_pci_ids);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* PCI handling of I2O controller
	3	*
	4	* Copyright (C) 1999-2002 Red Hat Software
	5	*
	6	* Written by Alan Cox, Building Number Three Ltd
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
	13	* A lot of the I2O message side code from this is taken from the Red
	14	* Creek RCPCI45 adapter driver by Red Creek Communications
	15	*
	16	* Fixes/additions:
	17	* Philipp Rumpf
96de0e25 JE	18	* Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI>
96de0e25 JE	19	* Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
1da177e4 LT	20	* Deepak Saxena <deepak@plexity.net>
	21	* Boji T Kannanthanam <boji.t.kannanthanam@intel.com>
	22	* Alan Cox <alan@redhat.com>:
	23	* Ported to Linux 2.5.
	24	* Markus Lidel <Markus.Lidel@shadowconnect.com>:
	25	* Minor fixes for 2.6.
	26	* Markus Lidel <Markus.Lidel@shadowconnect.com>:
	27	* Support for sysfs included.
	28	*/
	29
	30	#include <linux/pci.h>
	31	#include <linux/interrupt.h>
	32	#include <linux/i2o.h>
9e87545f	33	#include "core.h"
1da177e4	34
dc9352a4 ML	35	#define OSM_DESCRIPTION "I2O-subsystem"
dc9352a4 ML	36
1da177e4 LT	37	/* PCI device id table for all I2O controllers */
	38	static struct pci_device_id __devinitdata i2o_pci_ids[] = {
	39	{PCI_DEVICE_CLASS(PCI_CLASS_INTELLIGENT_I2O << 8, 0xffff00)},
	40	{PCI_DEVICE(PCI_VENDOR_ID_DPT, 0xa511)},
61fbfa81 ML	41	{.vendor = PCI_VENDOR_ID_INTEL,.device = 0x1962,
61fbfa81 ML	42	.subvendor = PCI_VENDOR_ID_PROMISE,.subdevice = PCI_ANY_ID},
1da177e4 LT	43	{0}
	44	};
	45
1da177e4 LT	46	/**
	47	* i2o_pci_free - Frees the DMA memory for the I2O controller
	48	* @c: I2O controller to free
	49	*
	50	* Remove all allocated DMA memory and unmap memory IO regions. If MTRR
	51	* is enabled, also remove it again.
	52	*/
	53	static void i2o_pci_free(struct i2o_controller *c)
	54	{
	55	struct device *dev;
	56
	57	dev = &c->pdev->dev;
	58
	59	i2o_dma_free(dev, &c->out_queue);
	60	i2o_dma_free(dev, &c->status_block);
f88e119c	61	kfree(c->lct);
1da177e4 LT	62	i2o_dma_free(dev, &c->dlct);
	63	i2o_dma_free(dev, &c->hrt);
	64	i2o_dma_free(dev, &c->status);
	65
1da177e4 LT	66	if (c->raptor && c->in_queue.virt)
	67	iounmap(c->in_queue.virt);
	68
	69	if (c->base.virt)
	70	iounmap(c->base.virt);
dc9352a4 ML	71
dc9352a4 ML	72	pci_release_regions(c->pdev);
1da177e4 LT	73	}
	74
	75	/**
	76	* i2o_pci_alloc - Allocate DMA memory, map IO memory for I2O controller
	77	* @c: I2O controller
	78	*
	79	* Allocate DMA memory for a PCI (or in theory AGP) I2O controller. All
	80	* IO mappings are also done here. If MTRR is enabled, also do add memory
	81	* regions here.
	82	*
	83	* Returns 0 on success or negative error code on failure.
	84	*/
	85	static int __devinit i2o_pci_alloc(struct i2o_controller *c)
	86	{
	87	struct pci_dev *pdev = c->pdev;
	88	struct device *dev = &pdev->dev;
	89	int i;
	90
15d8ec7d ML	91	if (pci_request_regions(pdev, OSM_DESCRIPTION)) {
	92	printk(KERN_ERR "%s: device already claimed\n", c->name);
	93	return -ENODEV;
	94	}
	95
1da177e4 LT	96	for (i = 0; i < 6; i++) {
	97	/* Skip I/O spaces */
	98	if (!(pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
	99	if (!c->base.phys) {
	100	c->base.phys = pci_resource_start(pdev, i);
	101	c->base.len = pci_resource_len(pdev, i);
	102
	103	/*
	104	* If we know what card it is, set the size
	105	* correctly. Code is taken from dpt_i2o.c
	106	*/
	107	if (pdev->device == 0xa501) {
	108	if (pdev->subsystem_device >= 0xc032 &&
	109	pdev->subsystem_device <= 0xc03b) {
	110	if (c->base.len > 0x400000)
	111	c->base.len = 0x400000;
	112	} else {
	113	if (c->base.len > 0x100000)
	114	c->base.len = 0x100000;
	115	}
	116	}
	117	if (!c->raptor)
	118	break;
	119	} else {
	120	c->in_queue.phys = pci_resource_start(pdev, i);
	121	c->in_queue.len = pci_resource_len(pdev, i);
	122	break;
	123	}
	124	}
	125	}
	126
	127	if (i == 6) {
	128	printk(KERN_ERR "%s: I2O controller has no memory regions"
	129	" defined.\n", c->name);
	130	i2o_pci_free(c);
	131	return -EINVAL;
	132	}
	133
	134	/* Map the I2O controller */
	135	if (c->raptor) {
	136	printk(KERN_INFO "%s: PCI I2O controller\n", c->name);
	137	printk(KERN_INFO " BAR0 at 0x%08lX size=%ld\n",
	138	(unsigned long)c->base.phys, (unsigned long)c->base.len);
	139	printk(KERN_INFO " BAR1 at 0x%08lX size=%ld\n",
	140	(unsigned long)c->in_queue.phys,
	141	(unsigned long)c->in_queue.len);
	142	} else
	143	printk(KERN_INFO "%s: PCI I2O controller at %08lX size=%ld\n",
	144	c->name, (unsigned long)c->base.phys,
	145	(unsigned long)c->base.len);
	146
61fbfa81	147	c->base.virt = ioremap_nocache(c->base.phys, c->base.len);
1da177e4 LT	148	if (!c->base.virt) {
1da177e4 LT	149	printk(KERN_ERR "%s: Unable to map controller.\n", c->name);
dc9352a4	150	i2o_pci_free(c);
1da177e4 LT	151	return -ENOMEM;
	152	}
	153
	154	if (c->raptor) {
61fbfa81 ML	155	c->in_queue.virt =
61fbfa81 ML	156	ioremap_nocache(c->in_queue.phys, c->in_queue.len);
1da177e4 LT	157	if (!c->in_queue.virt) {
	158	printk(KERN_ERR "%s: Unable to map controller.\n",
	159	c->name);
	160	i2o_pci_free(c);
	161	return -ENOMEM;
	162	}
	163	} else
	164	c->in_queue = c->base;
	165
f10378ff	166	c->irq_status = c->base.virt + I2O_IRQ_STATUS;
f88e119c ML	167	c->irq_mask = c->base.virt + I2O_IRQ_MASK;
	168	c->in_port = c->base.virt + I2O_IN_PORT;
	169	c->out_port = c->base.virt + I2O_OUT_PORT;
1da177e4	170
8b3e09e1 ML	171	/* Motorola/Freescale chip does not follow spec */
	172	if (pdev->vendor == PCI_VENDOR_ID_MOTOROLA && pdev->device == 0x18c0) {
	173	/* Check if CPU is enabled */
	174	if (be32_to_cpu(readl(c->base.virt + 0x10000)) & 0x10000000) {
	175	printk(KERN_INFO "%s: MPC82XX needs CPU running to "
	176	"service I2O.\n", c->name);
	177	i2o_pci_free(c);
	178	return -ENODEV;
	179	} else {
	180	c->irq_status += I2O_MOTOROLA_PORT_OFFSET;
	181	c->irq_mask += I2O_MOTOROLA_PORT_OFFSET;
	182	c->in_port += I2O_MOTOROLA_PORT_OFFSET;
	183	c->out_port += I2O_MOTOROLA_PORT_OFFSET;
	184	printk(KERN_INFO "%s: MPC82XX workarounds activated.\n",
	185	c->name);
	186	}
	187	}
	188
1da177e4 LT	189	if (i2o_dma_alloc(dev, &c->status, 8, GFP_KERNEL)) {
	190	i2o_pci_free(c);
	191	return -ENOMEM;
	192	}
	193
	194	if (i2o_dma_alloc(dev, &c->hrt, sizeof(i2o_hrt), GFP_KERNEL)) {
	195	i2o_pci_free(c);
	196	return -ENOMEM;
	197	}
	198
	199	if (i2o_dma_alloc(dev, &c->dlct, 8192, GFP_KERNEL)) {
	200	i2o_pci_free(c);
	201	return -ENOMEM;
	202	}
	203
	204	if (i2o_dma_alloc(dev, &c->status_block, sizeof(i2o_status_block),
	205	GFP_KERNEL)) {
	206	i2o_pci_free(c);
	207	return -ENOMEM;
	208	}
	209
f33213ec ML	210	if (i2o_dma_alloc
	211	(dev, &c->out_queue,
	212	I2O_MAX_OUTBOUND_MSG_FRAMES * I2O_OUTBOUND_MSG_FRAME_SIZE *
	213	sizeof(u32), GFP_KERNEL)) {
1da177e4 LT	214	i2o_pci_free(c);
	215	return -ENOMEM;
	216	}
	217
	218	pci_set_drvdata(pdev, c);
	219
	220	return 0;
	221	}
	222
	223	/**
	224	* i2o_pci_interrupt - Interrupt handler for I2O controller
	225	* @irq: interrupt line
	226	* @dev_id: pointer to the I2O controller
1da177e4 LT	227	*
	228	* Handle an interrupt from a PCI based I2O controller. This turns out
	229	* to be rather simple. We keep the controller pointer in the cookie.
	230	*/
7d12e780	231	static irqreturn_t i2o_pci_interrupt(int irq, void *dev_id)
1da177e4 LT	232	{
1da177e4 LT	233	struct i2o_controller *c = dev_id;
f10378ff ML	234	u32 m;
	235	irqreturn_t rc = IRQ_NONE;
	236
	237	while (readl(c->irq_status) & I2O_IRQ_OUTBOUND_POST) {
	238	m = readl(c->out_port);
	239	if (m == I2O_QUEUE_EMPTY) {
	240	/*
	241	* Old 960 steppings had a bug in the I2O unit that
	242	* caused the queue to appear empty when it wasn't.
	243	*/
	244	m = readl(c->out_port);
	245	if (unlikely(m == I2O_QUEUE_EMPTY))
	246	break;
	247	}
1da177e4	248
1da177e4	249	/* dispatch it */
f10378ff	250	if (i2o_driver_dispatch(c, m))
1da177e4	251	/* flush it if result != 0 */
f10378ff ML	252	i2o_flush_reply(c, m);
	253
	254	rc = IRQ_HANDLED;
1da177e4	255	}
f88e119c	256
f10378ff	257	return rc;
1da177e4 LT	258	}
	259
	260	/**
	261	* i2o_pci_irq_enable - Allocate interrupt for I2O controller
d9489fb6	262	* @c: i2o_controller that the request is for
1da177e4 LT	263	*
	264	* Allocate an interrupt for the I2O controller, and activate interrupts
	265	* on the I2O controller.
	266	*
	267	* Returns 0 on success or negative error code on failure.
	268	*/
	269	static int i2o_pci_irq_enable(struct i2o_controller *c)
	270	{
	271	struct pci_dev *pdev = c->pdev;
	272	int rc;
	273
f88e119c	274	writel(0xffffffff, c->irq_mask);
1da177e4 LT	275
1da177e4 LT	276	if (pdev->irq) {
dace1453	277	rc = request_irq(pdev->irq, i2o_pci_interrupt, IRQF_SHARED,
1da177e4 LT	278	c->name, c);
	279	if (rc < 0) {
	280	printk(KERN_ERR "%s: unable to allocate interrupt %d."
	281	"\n", c->name, pdev->irq);
	282	return rc;
	283	}
	284	}
	285
f88e119c	286	writel(0x00000000, c->irq_mask);
1da177e4 LT	287
	288	printk(KERN_INFO "%s: Installed at IRQ %d\n", c->name, pdev->irq);
	289
	290	return 0;
	291	}
	292
	293	/**
	294	* i2o_pci_irq_disable - Free interrupt for I2O controller
	295	* @c: I2O controller
	296	*
	297	* Disable interrupts in I2O controller and then free interrupt.
	298	*/
	299	static void i2o_pci_irq_disable(struct i2o_controller *c)
	300	{
f88e119c	301	writel(0xffffffff, c->irq_mask);
1da177e4 LT	302
	303	if (c->pdev->irq > 0)
	304	free_irq(c->pdev->irq, c);
	305	}
	306
	307	/**
	308	* i2o_pci_probe - Probe the PCI device for an I2O controller
d9489fb6	309	* @pdev: PCI device to test
1da177e4 LT	310	* @id: id which matched with the PCI device id table
	311	*
	312	* Probe the PCI device for any device which is a memory of the
	313	* Intelligent, I2O class or an Adaptec Zero Channel Controller. We
	314	* attempt to set up each such device and register it with the core.
	315	*
	316	* Returns 0 on success or negative error code on failure.
	317	*/
	318	static int __devinit i2o_pci_probe(struct pci_dev *pdev,
	319	const struct pci_device_id *id)
	320	{
	321	struct i2o_controller *c;
	322	int rc;
61fbfa81	323	struct pci_dev *i960 = NULL;
1da177e4 LT	324
	325	printk(KERN_INFO "i2o: Checking for PCI I2O controllers...\n");
	326
	327	if ((pdev->class & 0xff) > 1) {
61fbfa81 ML	328	printk(KERN_WARNING "i2o: %s does not support I2O 1.5 "
61fbfa81 ML	329	"(skipping).\n", pci_name(pdev));
1da177e4 LT	330	return -ENODEV;
	331	}
	332
95ddc5f2 IPG	333	if ((rc = pci_enable_device(pdev))) {
	334	printk(KERN_WARNING "i2o: couldn't enable device %s\n",
	335	pci_name(pdev));
	336	return rc;
	337	}
9638d89a	338
1da177e4	339	if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
61fbfa81 ML	340	printk(KERN_WARNING "i2o: no suitable DMA found for %s\n",
61fbfa81 ML	341	pci_name(pdev));
1da177e4 LT	342	rc = -ENODEV;
	343	goto disable;
	344	}
	345
	346	pci_set_master(pdev);
	347
	348	c = i2o_iop_alloc();
	349	if (IS_ERR(c)) {
61fbfa81 ML	350	printk(KERN_ERR "i2o: couldn't allocate memory for %s\n",
61fbfa81 ML	351	pci_name(pdev));
1da177e4 LT	352	rc = PTR_ERR(c);
1da177e4 LT	353	goto disable;
61fbfa81 ML	354	} else
	355	printk(KERN_INFO "%s: controller found (%s)\n", c->name,
	356	pci_name(pdev));
1da177e4 LT	357
1da177e4 LT	358	c->pdev = pdev;
dcceafe2	359	c->device.parent = &pdev->dev;
1da177e4 LT	360
	361	/* Cards that fall apart if you hit them with large I/O loads... */
	362	if (pdev->vendor == PCI_VENDOR_ID_NCR && pdev->device == 0x0630) {
	363	c->short_req = 1;
	364	printk(KERN_INFO "%s: Symbios FC920 workarounds activated.\n",
	365	c->name);
	366	}
	367
	368	if (pdev->subsystem_vendor == PCI_VENDOR_ID_PROMISE) {
61fbfa81 ML	369	/*
	370	* Expose the ship behind i960 for initialization, or it will
	371	* failed
	372	*/
df10f4ed	373	i960 = pci_get_slot(c->pdev->bus,
61fbfa81 ML	374	PCI_DEVFN(PCI_SLOT(c->pdev->devfn), 0));
61fbfa81 ML	375
df10f4ed	376	if (i960) {
61fbfa81	377	pci_write_config_word(i960, 0x42, 0);
df10f4ed AC	378	pci_dev_put(i960);
df10f4ed AC	379	}
61fbfa81	380
1da177e4	381	c->promise = 1;
718c3183	382	c->limit_sectors = 1;
1da177e4 LT	383	}
1da177e4 LT	384
b2aaee33 ML	385	if (pdev->subsystem_vendor == PCI_VENDOR_ID_DPT)
	386	c->adaptec = 1;
	387
1da177e4 LT	388	/* Cards that go bananas if you quiesce them before you reset them. */
	389	if (pdev->vendor == PCI_VENDOR_ID_DPT) {
	390	c->no_quiesce = 1;
	391	if (pdev->device == 0xa511)
	392	c->raptor = 1;
b2aaee33 ML	393
	394	if (pdev->subsystem_device == 0xc05a) {
	395	c->limit_sectors = 1;
	396	printk(KERN_INFO
	397	"%s: limit sectors per request to %d\n", c->name,
	398	I2O_MAX_SECTORS_LIMITED);
	399	}
	400	#ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
	401	if (sizeof(dma_addr_t) > 4) {
	402	if (pci_set_dma_mask(pdev, DMA_64BIT_MASK))
	403	printk(KERN_INFO "%s: 64-bit DMA unavailable\n",
	404	c->name);
	405	else {
	406	c->pae_support = 1;
	407	printk(KERN_INFO "%s: using 64-bit DMA\n",
	408	c->name);
	409	}
	410	}
	411	#endif
1da177e4 LT	412	}
	413
	414	if ((rc = i2o_pci_alloc(c))) {
	415	printk(KERN_ERR "%s: DMA / IO allocation for I2O controller "
15d8ec7d	416	"failed\n", c->name);
1da177e4 LT	417	goto free_controller;
	418	}
	419
	420	if (i2o_pci_irq_enable(c)) {
	421	printk(KERN_ERR "%s: unable to enable interrupts for I2O "
	422	"controller\n", c->name);
	423	goto free_pci;
	424	}
	425
	426	if ((rc = i2o_iop_add(c)))
	427	goto uninstall;
	428
61fbfa81 ML	429	if (i960)
	430	pci_write_config_word(i960, 0x42, 0x03ff);
	431
1da177e4 LT	432	return 0;
	433
	434	uninstall:
	435	i2o_pci_irq_disable(c);
	436
	437	free_pci:
	438	i2o_pci_free(c);
	439
	440	free_controller:
16a63173	441	i2o_iop_free(c);
1da177e4 LT	442
1da177e4 LT	443	disable:
95ddc5f2	444	pci_disable_device(pdev);
1da177e4 LT	445
	446	return rc;
	447	}
	448
	449	/**
	450	* i2o_pci_remove - Removes a I2O controller from the system
d9489fb6	451	* @pdev: I2O controller which should be removed
1da177e4 LT	452	*
	453	* Reset the I2O controller, disable interrupts and remove all allocated
	454	* resources.
	455	*/
	456	static void __devexit i2o_pci_remove(struct pci_dev *pdev)
	457	{
	458	struct i2o_controller *c;
	459	c = pci_get_drvdata(pdev);
	460
	461	i2o_iop_remove(c);
	462	i2o_pci_irq_disable(c);
	463	i2o_pci_free(c);
	464
f88e119c ML	465	pci_disable_device(pdev);
f88e119c ML	466
1da177e4 LT	467	printk(KERN_INFO "%s: Controller removed.\n", c->name);
1da177e4 LT	468
f88e119c	469	put_device(&c->device);
1da177e4 LT	470	};
	471
	472	/* PCI driver for I2O controller */
	473	static struct pci_driver i2o_pci_driver = {
f88e119c	474	.name = "PCI_I2O",
1da177e4 LT	475	.id_table = i2o_pci_ids,
	476	.probe = i2o_pci_probe,
	477	.remove = __devexit_p(i2o_pci_remove),
	478	};
	479
	480	/**
	481	* i2o_pci_init - registers I2O PCI driver in PCI subsystem
	482	*
	483	* Returns > 0 on success or negative error code on failure.
	484	*/
	485	int __init i2o_pci_init(void)
	486	{
	487	return pci_register_driver(&i2o_pci_driver);
	488	};
	489
	490	/**
	491	* i2o_pci_exit - unregisters I2O PCI driver from PCI subsystem
	492	*/
	493	void __exit i2o_pci_exit(void)
	494	{
	495	pci_unregister_driver(&i2o_pci_driver);
	496	};
a1a5ea70	497
1da177e4	498	MODULE_DEVICE_TABLE(pci, i2o_pci_ids);