[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / drm_pci.c

/*
 * Copyright 2003 José Fonseca.
 * Copyright 2003 Leif Delgass.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/export.h>
#include <drm/drmP.h>

/**
 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
 * @dev: DRM device
 * @size: size of block to allocate
 * @align: alignment of block
 *
 * Return: A handle to the allocated memory block on success or NULL on
 * failure.
 */
drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
{
	drm_dma_handle_t *dmah;
	unsigned long addr;
	size_t sz;

	/* pci_alloc_consistent only guarantees alignment to the smallest
	 * PAGE_SIZE order which is greater than or equal to the requested size.
	 * Return NULL here for now to make sure nobody tries for larger alignment
	 */
	if (align > size)
		return NULL;

	dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
	if (!dmah)
		return NULL;

	dmah->size = size;
	dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);

	if (dmah->vaddr == NULL) {
		kfree(dmah);
		return NULL;
	}

	memset(dmah->vaddr, 0, size);

	/* XXX - Is virt_to_page() legal for consistent mem? */
	/* Reserve */
	for (addr = (unsigned long)dmah->vaddr, sz = size;
	     sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
		SetPageReserved(virt_to_page((void *)addr));
	}

	return dmah;
}

EXPORT_SYMBOL(drm_pci_alloc);

/*
 * Free a PCI consistent memory block without freeing its descriptor.
 *
 * This function is for internal use in the Linux-specific DRM core code.
 */
void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
{
	unsigned long addr;
	size_t sz;

	if (dmah->vaddr) {
		/* XXX - Is virt_to_page() legal for consistent mem? */
		/* Unreserve */
		for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
		     sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
			ClearPageReserved(virt_to_page((void *)addr));
		}
		dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
				  dmah->busaddr);
	}
}

/**
 * drm_pci_free - Free a PCI consistent memory block
 * @dev: DRM device
 * @dmah: handle to memory block
 */
void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
{
	__drm_legacy_pci_free(dev, dmah);
	kfree(dmah);
}

EXPORT_SYMBOL(drm_pci_free);

#ifdef CONFIG_PCI

static int drm_get_pci_domain(struct drm_device *dev)
{
#ifndef __alpha__
	/* For historical reasons, drm_get_pci_domain() is busticated
	 * on most archs and has to remain so for userspace interface
	 * < 1.4, except on alpha which was right from the beginning
	 */
	if (dev->if_version < 0x10004)
		return 0;
#endif /* __alpha__ */

	return pci_domain_nr(dev->pdev->bus);
}

int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
{
	master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
					drm_get_pci_domain(dev),
					dev->pdev->bus->number,
					PCI_SLOT(dev->pdev->devfn),
					PCI_FUNC(dev->pdev->devfn));
	if (!master->unique)
		return -ENOMEM;

	master->unique_len = strlen(master->unique);
	return 0;
}
EXPORT_SYMBOL(drm_pci_set_busid);

int drm_pci_set_unique(struct drm_device *dev,
		       struct drm_master *master,
		       struct drm_unique *u)
{
	int domain, bus, slot, func, ret;

	master->unique_len = u->unique_len;
	master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
	if (!master->unique) {
		ret = -ENOMEM;
		goto err;
	}

	if (copy_from_user(master->unique, u->unique, master->unique_len)) {
		ret = -EFAULT;
		goto err;
	}

	master->unique[master->unique_len] = '\0';

	/* Return error if the busid submitted doesn't match the device's actual
	 * busid.
	 */
	ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
	if (ret != 3) {
		ret = -EINVAL;
		goto err;
	}

	domain = bus >> 8;
	bus &= 0xff;

	if ((domain != drm_get_pci_domain(dev)) ||
	    (bus != dev->pdev->bus->number) ||
	    (slot != PCI_SLOT(dev->pdev->devfn)) ||
	    (func != PCI_FUNC(dev->pdev->devfn))) {
		ret = -EINVAL;
		goto err;
	}
	return 0;
err:
	return ret;
}

static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
{
	if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
	    (p->busnum & 0xff) != dev->pdev->bus->number ||
	    p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
		return -EINVAL;

	p->irq = dev->pdev->irq;

	DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
		  p->irq);
	return 0;
}

/**
 * drm_irq_by_busid - Get interrupt from bus ID
 * @dev: DRM device
 * @data: IOCTL parameter pointing to a drm_irq_busid structure
 * @file_priv: DRM file private.
 *
 * Finds the PCI device with the specified bus id and gets its IRQ number.
 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
 * to that of the device that this DRM instance attached to.
 *
 * Return: 0 on success or a negative error code on failure.
 */
int drm_irq_by_busid(struct drm_device *dev, void *data,
		     struct drm_file *file_priv)
{
	struct drm_irq_busid *p = data;

	if (drm_core_check_feature(dev, DRIVER_MODESET))
		return -EINVAL;

	/* UMS was only ever support on PCI devices. */
	if (WARN_ON(!dev->pdev))
		return -EINVAL;

	if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
		return -EINVAL;

	return drm_pci_irq_by_busid(dev, p);
}

static void drm_pci_agp_init(struct drm_device *dev)
{
	if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
		if (drm_pci_device_is_agp(dev))
			dev->agp = drm_agp_init(dev);
		if (dev->agp) {
			dev->agp->agp_mtrr = arch_phys_wc_add(
				dev->agp->agp_info.aper_base,
				dev->agp->agp_info.aper_size *
				1024 * 1024);
		}
	}
}

void drm_pci_agp_destroy(struct drm_device *dev)
{
	if (dev->agp) {
		arch_phys_wc_del(dev->agp->agp_mtrr);
		drm_agp_clear(dev);
		kfree(dev->agp);
		dev->agp = NULL;
	}
}

/**
 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
 * @pdev: PCI device
 * @ent: entry from the PCI ID table that matches @pdev
 * @driver: DRM device driver
 *
 * Attempt to gets inter module "drm" information. If we are first
 * then register the character device and inter module information.
 * Try and register, if we fail to register, backout previous work.
 *
 * Return: 0 on success or a negative error code on failure.
 */
int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
		    struct drm_driver *driver)
{
	struct drm_device *dev;
	int ret;

	DRM_DEBUG("\n");

	dev = drm_dev_alloc(driver, &pdev->dev);
	if (!dev)
		return -ENOMEM;

	ret = pci_enable_device(pdev);
	if (ret)
		goto err_free;

	dev->pdev = pdev;
#ifdef __alpha__
	dev->hose = pdev->sysdata;
#endif

	if (drm_core_check_feature(dev, DRIVER_MODESET))
		pci_set_drvdata(pdev, dev);

	drm_pci_agp_init(dev);

	ret = drm_dev_register(dev, ent->driver_data);
	if (ret)
		goto err_agp;

	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
		 driver->name, driver->major, driver->minor, driver->patchlevel,
		 driver->date, pci_name(pdev), dev->primary->index);

	/* No locking needed since shadow-attach is single-threaded since it may
	 * only be called from the per-driver module init hook. */
	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);

	return 0;

err_agp:
	drm_pci_agp_destroy(dev);
	pci_disable_device(pdev);
err_free:
	drm_dev_unref(dev);
	return ret;
}
EXPORT_SYMBOL(drm_get_pci_dev);

/**
 * drm_pci_init - Register matching PCI devices with the DRM subsystem
 * @driver: DRM device driver
 * @pdriver: PCI device driver
 *
 * Initializes a drm_device structures, registering the stubs and initializing
 * the AGP device.
 *
 * Return: 0 on success or a negative error code on failure.
 */
int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
{
	struct pci_dev *pdev = NULL;
	const struct pci_device_id *pid;
	int i;

	DRM_DEBUG("\n");

	if (driver->driver_features & DRIVER_MODESET)
		return pci_register_driver(pdriver);

	/* If not using KMS, fall back to stealth mode manual scanning. */
	INIT_LIST_HEAD(&driver->legacy_dev_list);
	for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
		pid = &pdriver->id_table[i];

		/* Loop around setting up a DRM device for each PCI device
		 * matching our ID and device class.  If we had the internal
		 * function that pci_get_subsys and pci_get_class used, we'd
		 * be able to just pass pid in instead of doing a two-stage
		 * thing.
		 */
		pdev = NULL;
		while ((pdev =
			pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
				       pid->subdevice, pdev)) != NULL) {
			if ((pdev->class & pid->class_mask) != pid->class)
				continue;

			/* stealth mode requires a manual probe */
			pci_dev_get(pdev);
			drm_get_pci_dev(pdev, pid, driver);
		}
	}
	return 0;
}

int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
{
	struct pci_dev *root;
	u32 lnkcap, lnkcap2;

	*mask = 0;
	if (!dev->pdev)
		return -EINVAL;

	root = dev->pdev->bus->self;

	/* we've been informed via and serverworks don't make the cut */
	if (root->vendor == PCI_VENDOR_ID_VIA ||
	    root->vendor == PCI_VENDOR_ID_SERVERWORKS)
		return -EINVAL;

	pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
	pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);

	if (lnkcap2) {	/* PCIe r3.0-compliant */
		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
			*mask |= DRM_PCIE_SPEED_25;
		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
			*mask |= DRM_PCIE_SPEED_50;
		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
			*mask |= DRM_PCIE_SPEED_80;
	} else {	/* pre-r3.0 */
		if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
			*mask |= DRM_PCIE_SPEED_25;
		if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
			*mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
	}

	DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
	return 0;
}
EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);

#else

int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
{
	return -1;
}

void drm_pci_agp_destroy(struct drm_device *dev) {}

int drm_irq_by_busid(struct drm_device *dev, void *data,
		     struct drm_file *file_priv)
{
	return -EINVAL;
}

int drm_pci_set_unique(struct drm_device *dev,
		       struct drm_master *master,
		       struct drm_unique *u)
{
	return -EINVAL;
}
#endif

EXPORT_SYMBOL(drm_pci_init);

/**
 * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
 * @driver: DRM device driver
 * @pdriver: PCI device driver
 *
 * Unregisters one or more devices matched by a PCI driver from the DRM
 * subsystem.
 */
void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
{
	struct drm_device *dev, *tmp;
	DRM_DEBUG("\n");

	if (driver->driver_features & DRIVER_MODESET) {
		pci_unregister_driver(pdriver);
	} else {
		list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
					 legacy_dev_list) {
			list_del(&dev->legacy_dev_list);
			drm_put_dev(dev);
		}
	}
	DRM_INFO("Module unloaded\n");
}
EXPORT_SYMBOL(drm_pci_exit);
Commit	Line	Data
1da177e4	1	/*
96de0e25	2	* Copyright 2003 José Fonseca.
1da177e4 LT	3	* Copyright 2003 Leif Delgass.
	4	* All Rights Reserved.
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the "Software"),
	8	* to deal in the Software without restriction, including without limitation
	9	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	10	* and/or sell copies of the Software, and to permit persons to whom the
	11	* Software is furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice (including the next
	14	* paragraph) shall be included in all copies or substantial portions of the
	15	* Software.
	16	*
	17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	18	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	20	* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	21	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	22	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	23	*/
	24
	25	#include <linux/pci.h>
5a0e3ad6	26	#include <linux/slab.h>
195b3a2d	27	#include <linux/dma-mapping.h>
2d1a8a48	28	#include <linux/export.h>
760285e7	29	#include <drm/drmP.h>
1da177e4	30
1da177e4	31	/**
c6a1af8a TR	32	* drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
	33	* @dev: DRM device
	34	* @size: size of block to allocate
	35	* @align: alignment of block
	36	*
	37	* Return: A handle to the allocated memory block on success or NULL on
	38	* failure.
1da177e4	39	*/
e6be8d9d	40	drm_dma_handle_t drm_pci_alloc(struct drm_device dev, size_t size, size_t align)
1da177e4	41	{
9c8da5eb	42	drm_dma_handle_t *dmah;
ddf19b97 DA	43	unsigned long addr;
ddf19b97 DA	44	size_t sz;
1da177e4 LT	45
	46	/* pci_alloc_consistent only guarantees alignment to the smallest
	47	* PAGE_SIZE order which is greater than or equal to the requested size.
	48	* Return NULL here for now to make sure nobody tries for larger alignment
	49	*/
	50	if (align > size)
	51	return NULL;
	52
9c8da5eb DA	53	dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
	54	if (!dmah)
	55	return NULL;
b5e89ed5	56
9c8da5eb	57	dmah->size = size;
ddf19b97	58	dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL \| __GFP_COMP);
1da177e4	59
9c8da5eb DA	60	if (dmah->vaddr == NULL) {
9c8da5eb DA	61	kfree(dmah);
1da177e4	62	return NULL;
9c8da5eb	63	}
1da177e4	64
9c8da5eb	65	memset(dmah->vaddr, 0, size);
1da177e4	66
ddf19b97 DA	67	/* XXX - Is virt_to_page() legal for consistent mem? */
	68	/* Reserve */
	69	for (addr = (unsigned long)dmah->vaddr, sz = size;
	70	sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
e1e78533	71	SetPageReserved(virt_to_page((void *)addr));
ddf19b97 DA	72	}
ddf19b97 DA	73
9c8da5eb	74	return dmah;
1da177e4	75	}
b5e89ed5	76
1da177e4 LT	77	EXPORT_SYMBOL(drm_pci_alloc);
1da177e4 LT	78
c6a1af8a TR	79	/*
c6a1af8a TR	80	* Free a PCI consistent memory block without freeing its descriptor.
9c8da5eb DA	81	*
9c8da5eb DA	82	* This function is for internal use in the Linux-specific DRM core code.
1da177e4	83	*/
1c96e84e	84	void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
1da177e4	85	{
ddf19b97 DA	86	unsigned long addr;
ddf19b97 DA	87	size_t sz;
1da177e4	88
9a298b2a	89	if (dmah->vaddr) {
ddf19b97 DA	90	/* XXX - Is virt_to_page() legal for consistent mem? */
	91	/* Unreserve */
	92	for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
	93	sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
e1e78533	94	ClearPageReserved(virt_to_page((void *)addr));
ddf19b97 DA	95	}
	96	dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
	97	dmah->busaddr);
1da177e4	98	}
1da177e4	99	}
9c8da5eb DA	100
9c8da5eb DA	101	/**
c6a1af8a TR	102	* drm_pci_free - Free a PCI consistent memory block
	103	* @dev: DRM device
	104	* @dmah: handle to memory block
9c8da5eb	105	*/
84b1fd10	106	void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
9c8da5eb	107	{
1c96e84e	108	__drm_legacy_pci_free(dev, dmah);
9c8da5eb DA	109	kfree(dmah);
9c8da5eb DA	110	}
b5e89ed5	111
1da177e4 LT	112	EXPORT_SYMBOL(drm_pci_free);
1da177e4 LT	113
dcdb1674	114	#ifdef CONFIG_PCI
8410ea3b DA	115
	116	static int drm_get_pci_domain(struct drm_device *dev)
	117	{
	118	#ifndef __alpha__
	119	/* For historical reasons, drm_get_pci_domain() is busticated
	120	* on most archs and has to remain so for userspace interface
	121	* < 1.4, except on alpha which was right from the beginning
	122	*/
	123	if (dev->if_version < 0x10004)
	124	return 0;
	125	#endif /* __alpha__ */
	126
	127	return pci_domain_nr(dev->pdev->bus);
	128	}
	129
915b4d11	130	int drm_pci_set_busid(struct drm_device dev, struct drm_master master)
8410ea3b	131	{
d0a39164 DH	132	master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
	133	drm_get_pci_domain(dev),
	134	dev->pdev->bus->number,
	135	PCI_SLOT(dev->pdev->devfn),
	136	PCI_FUNC(dev->pdev->devfn));
	137	if (!master->unique)
8410ea3b DA	138	return -ENOMEM;
8410ea3b DA	139
d0a39164	140	master->unique_len = strlen(master->unique);
8410ea3b	141	return 0;
8410ea3b	142	}
915b4d11	143	EXPORT_SYMBOL(drm_pci_set_busid);
8410ea3b	144
53bf2a2b DV	145	int drm_pci_set_unique(struct drm_device *dev,
	146	struct drm_master *master,
	147	struct drm_unique *u)
8410ea3b DA	148	{
8410ea3b DA	149	int domain, bus, slot, func, ret;
8410ea3b DA	150
8410ea3b DA	151	master->unique_len = u->unique_len;
1e444be0	152	master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
8410ea3b DA	153	if (!master->unique) {
	154	ret = -ENOMEM;
	155	goto err;
	156	}
	157
	158	if (copy_from_user(master->unique, u->unique, master->unique_len)) {
	159	ret = -EFAULT;
	160	goto err;
	161	}
	162
	163	master->unique[master->unique_len] = '\0';
	164
8410ea3b DA	165	/* Return error if the busid submitted doesn't match the device's actual
	166	* busid.
	167	*/
	168	ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
	169	if (ret != 3) {
	170	ret = -EINVAL;
	171	goto err;
	172	}
	173
	174	domain = bus >> 8;
	175	bus &= 0xff;
	176
	177	if ((domain != drm_get_pci_domain(dev)) \|\|
	178	(bus != dev->pdev->bus->number) \|\|
	179	(slot != PCI_SLOT(dev->pdev->devfn)) \|\|
	180	(func != PCI_FUNC(dev->pdev->devfn))) {
	181	ret = -EINVAL;
	182	goto err;
	183	}
	184	return 0;
	185	err:
	186	return ret;
	187	}
	188
45e97ab6	189	static int drm_pci_irq_by_busid(struct drm_device dev, struct drm_irq_busid p)
8410ea3b DA	190	{
	191	if ((p->busnum >> 8) != drm_get_pci_domain(dev) \|\|
	192	(p->busnum & 0xff) != dev->pdev->bus->number \|\|
	193	p->devnum != PCI_SLOT(dev->pdev->devfn) \|\| p->funcnum != PCI_FUNC(dev->pdev->devfn))
	194	return -EINVAL;
	195
	196	p->irq = dev->pdev->irq;
	197
	198	DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
	199	p->irq);
	200	return 0;
	201	}
	202
eaaf8f0f	203	/**
c6a1af8a TR	204	* drm_irq_by_busid - Get interrupt from bus ID
	205	* @dev: DRM device
	206	* @data: IOCTL parameter pointing to a drm_irq_busid structure
	207	* @file_priv: DRM file private.
eaaf8f0f DV	208	*
	209	* Finds the PCI device with the specified bus id and gets its IRQ number.
	210	* This IOCTL is deprecated, and will now return EINVAL for any busid not equal
	211	* to that of the device that this DRM instance attached to.
c6a1af8a TR	212	*
c6a1af8a TR	213	* Return: 0 on success or a negative error code on failure.
eaaf8f0f DV	214	*/
	215	int drm_irq_by_busid(struct drm_device dev, void data,
	216	struct drm_file *file_priv)
	217	{
	218	struct drm_irq_busid *p = data;
	219
	220	if (drm_core_check_feature(dev, DRIVER_MODESET))
	221	return -EINVAL;
	222
	223	/* UMS was only ever support on PCI devices. */
	224	if (WARN_ON(!dev->pdev))
	225	return -EINVAL;
	226
	227	if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
	228	return -EINVAL;
	229
	230	return drm_pci_irq_by_busid(dev, p);
	231	}
	232
8da79ccd	233	static void drm_pci_agp_init(struct drm_device *dev)
8410ea3b	234	{
d9906753	235	if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
8410ea3b DA	236	if (drm_pci_device_is_agp(dev))
8410ea3b DA	237	dev->agp = drm_agp_init(dev);
28185647 DV	238	if (dev->agp) {
	239	dev->agp->agp_mtrr = arch_phys_wc_add(
	240	dev->agp->agp_info.aper_base,
	241	dev->agp->agp_info.aper_size *
	242	1024 * 1024);
8410ea3b DA	243	}
8410ea3b DA	244	}
8410ea3b DA	245	}
8410ea3b DA	246
4efafebe	247	void drm_pci_agp_destroy(struct drm_device *dev)
28ec711c	248	{
d9906753	249	if (dev->agp) {
28185647	250	arch_phys_wc_del(dev->agp->agp_mtrr);
28ec711c	251	drm_agp_clear(dev);
d6e4b28b	252	kfree(dev->agp);
28ec711c DH	253	dev->agp = NULL;
	254	}
	255	}
	256
dcdb1674	257	/**
c6a1af8a TR	258	* drm_get_pci_dev - Register a PCI device with the DRM subsystem
	259	* @pdev: PCI device
	260	* @ent: entry from the PCI ID table that matches @pdev
	261	* @driver: DRM device driver
dcdb1674 JC	262	*
	263	* Attempt to gets inter module "drm" information. If we are first
	264	* then register the character device and inter module information.
	265	* Try and register, if we fail to register, backout previous work.
c6a1af8a TR	266	*
c6a1af8a TR	267	* Return: 0 on success or a negative error code on failure.
dcdb1674 JC	268	*/
	269	int drm_get_pci_dev(struct pci_dev pdev, const struct pci_device_id ent,
	270	struct drm_driver *driver)
	271	{
	272	struct drm_device *dev;
	273	int ret;
	274
	275	DRM_DEBUG("\n");
	276
1bb72532	277	dev = drm_dev_alloc(driver, &pdev->dev);
dcdb1674 JC	278	if (!dev)
	279	return -ENOMEM;
	280
	281	ret = pci_enable_device(pdev);
	282	if (ret)
c22f0ace	283	goto err_free;
dcdb1674	284
dcdb1674	285	dev->pdev = pdev;
dcdb1674 JC	286	#ifdef __alpha__
	287	dev->hose = pdev->sysdata;
	288	#endif
	289
c22f0ace	290	if (drm_core_check_feature(dev, DRIVER_MODESET))
dcdb1674	291	pci_set_drvdata(pdev, dev);
1793126f	292
2c695fa0	293	drm_pci_agp_init(dev);
2c695fa0	294
c22f0ace DH	295	ret = drm_dev_register(dev, ent->driver_data);
c22f0ace DH	296	if (ret)
2c695fa0	297	goto err_agp;
dcdb1674 JC	298
	299	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
	300	driver->name, driver->major, driver->minor, driver->patchlevel,
	301	driver->date, pci_name(pdev), dev->primary->index);
	302
b3f2333d DV	303	/* No locking needed since shadow-attach is single-threaded since it may
	304	* only be called from the per-driver module init hook. */
	305	if (!drm_core_check_feature(dev, DRIVER_MODESET))
	306	list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
	307
dcdb1674 JC	308	return 0;
dcdb1674 JC	309
2c695fa0	310	err_agp:
2c695fa0	311	drm_pci_agp_destroy(dev);
dcdb1674	312	pci_disable_device(pdev);
c22f0ace	313	err_free:
099d1c29	314	drm_dev_unref(dev);
dcdb1674 JC	315	return ret;
	316	}
	317	EXPORT_SYMBOL(drm_get_pci_dev);
	318
	319	/**
c6a1af8a TR	320	* drm_pci_init - Register matching PCI devices with the DRM subsystem
	321	* @driver: DRM device driver
	322	* @pdriver: PCI device driver
dcdb1674	323	*
c6a1af8a TR	324	* Initializes a drm_device structures, registering the stubs and initializing
c6a1af8a TR	325	* the AGP device.
dcdb1674	326	*
c6a1af8a	327	* Return: 0 on success or a negative error code on failure.
dcdb1674	328	*/
8410ea3b	329	int drm_pci_init(struct drm_driver driver, struct pci_driver pdriver)
dcdb1674 JC	330	{
	331	struct pci_dev *pdev = NULL;
	332	const struct pci_device_id *pid;
	333	int i;
	334
8410ea3b DA	335	DRM_DEBUG("\n");
8410ea3b DA	336
dcdb1674	337	if (driver->driver_features & DRIVER_MODESET)
8410ea3b	338	return pci_register_driver(pdriver);
dcdb1674 JC	339
dcdb1674 JC	340	/* If not using KMS, fall back to stealth mode manual scanning. */
b3f2333d	341	INIT_LIST_HEAD(&driver->legacy_dev_list);
8410ea3b DA	342	for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
8410ea3b DA	343	pid = &pdriver->id_table[i];
dcdb1674 JC	344
	345	/* Loop around setting up a DRM device for each PCI device
	346	* matching our ID and device class. If we had the internal
	347	* function that pci_get_subsys and pci_get_class used, we'd
	348	* be able to just pass pid in instead of doing a two-stage
	349	* thing.
	350	*/
	351	pdev = NULL;
	352	while ((pdev =
	353	pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
	354	pid->subdevice, pdev)) != NULL) {
	355	if ((pdev->class & pid->class_mask) != pid->class)
	356	continue;
	357
	358	/* stealth mode requires a manual probe */
	359	pci_dev_get(pdev);
	360	drm_get_pci_dev(pdev, pid, driver);
	361	}
	362	}
	363	return 0;
	364	}
	365
f4297784 DA	366	int drm_pcie_get_speed_cap_mask(struct drm_device dev, u32 mask)
	367	{
	368	struct pci_dev *root;
dd66cc2e	369	u32 lnkcap, lnkcap2;
f4297784 DA	370
	371	*mask = 0;
	372	if (!dev->pdev)
	373	return -EINVAL;
	374
f4297784 DA	375	root = dev->pdev->bus->self;
f4297784 DA	376
f4297784 DA	377	/* we've been informed via and serverworks don't make the cut */
	378	if (root->vendor == PCI_VENDOR_ID_VIA \|\|
	379	root->vendor == PCI_VENDOR_ID_SERVERWORKS)
	380	return -EINVAL;
	381
dd66cc2e BH	382	pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
dd66cc2e BH	383	pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
f4297784	384
dd66cc2e	385	if (lnkcap2) { /* PCIe r3.0-compliant */
f4297784 DA	386	if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
	387	*mask \|= DRM_PCIE_SPEED_25;
	388	if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
	389	*mask \|= DRM_PCIE_SPEED_50;
	390	if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
	391	*mask \|= DRM_PCIE_SPEED_80;
dd66cc2e	392	} else { /* pre-r3.0 */
9fe0423e	393	if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
f4297784	394	*mask \|= DRM_PCIE_SPEED_25;
9fe0423e	395	if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
f8acf6f4	396	*mask \|= (DRM_PCIE_SPEED_25 \| DRM_PCIE_SPEED_50);
f4297784 DA	397	}
	398
	399	DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
	400	return 0;
	401	}
	402	EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
93711d8b BH	403
	404	#else
	405
	406	int drm_pci_init(struct drm_driver driver, struct pci_driver pdriver)
	407	{
	408	return -1;
	409	}
	410
4efafebe	411	void drm_pci_agp_destroy(struct drm_device *dev) {}
eaaf8f0f DV	412
	413	int drm_irq_by_busid(struct drm_device dev, void data,
	414	struct drm_file *file_priv)
	415	{
	416	return -EINVAL;
	417	}
53bf2a2b DV	418
	419	int drm_pci_set_unique(struct drm_device *dev,
	420	struct drm_master *master,
	421	struct drm_unique *u)
	422	{
	423	return -EINVAL;
	424	}
93711d8b BH	425	#endif
	426
	427	EXPORT_SYMBOL(drm_pci_init);
	428
c6a1af8a TR	429	/**
	430	* drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
	431	* @driver: DRM device driver
	432	* @pdriver: PCI device driver
	433	*
	434	* Unregisters one or more devices matched by a PCI driver from the DRM
	435	* subsystem.
	436	*/
93711d8b BH	437	void drm_pci_exit(struct drm_driver driver, struct pci_driver pdriver)
	438	{
	439	struct drm_device dev, tmp;
	440	DRM_DEBUG("\n");
	441
	442	if (driver->driver_features & DRIVER_MODESET) {
	443	pci_unregister_driver(pdriver);
	444	} else {
b3f2333d DV	445	list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
b3f2333d DV	446	legacy_dev_list) {
b3f2333d	447	list_del(&dev->legacy_dev_list);
c94adc4a	448	drm_put_dev(dev);
b3f2333d	449	}
93711d8b BH	450	}
	451	DRM_INFO("Module unloaded\n");
	452	}
	453	EXPORT_SYMBOL(drm_pci_exit);