[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/drm_pci.h>
#include <drm/drmP.h>
#include "drm_internal.h"
#include "drm_legacy.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
 *
 * FIXME: This is a needless abstraction of the Linux dma-api and should be
 * removed.
 *
 * 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
 *
 * FIXME: This is a needless abstraction of the Linux dma-api and should be
 * removed.
 */
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;
}

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_LEGACY))
		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 (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
			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_legacy_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.
 *
 * NOTE: This function is deprecated, please use drm_dev_alloc() and
 * drm_dev_register() instead and remove your &drm_driver.load callback.
 *
 * 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 (IS_ERR(dev))
		return PTR_ERR(dev);

	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;

	/* 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_LEGACY))
		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_legacy_pci_init - shadow-attach a legacy DRM PCI driver
 * @driver: DRM device driver
 * @pdriver: PCI device driver
 *
 * This is only used by legacy dri1 drivers and deprecated.
 *
 * Return: 0 on success or a negative error code on failure.
 */
int drm_legacy_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 (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
		return -EINVAL;

	/* 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;
}
EXPORT_SYMBOL(drm_legacy_pci_init);

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);

int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw)
{
	struct pci_dev *root;
	u32 lnkcap;

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

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

	pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);

	*mlw = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4;

	DRM_INFO("probing mlw for device %x:%x = %x\n", root->vendor, root->device, lnkcap);
	return 0;
}
EXPORT_SYMBOL(drm_pcie_get_max_link_width);

#else

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;
}
#endif

/**
 * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
 * @driver: DRM device driver
 * @pdriver: PCI device driver
 *
 * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
 * is deprecated and only used by dri1 drivers.
 */
void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
{
	struct drm_device *dev, *tmp;
	DRM_DEBUG("\n");

	if (!(driver->driver_features & DRIVER_LEGACY)) {
		WARN_ON(1);
	} 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_legacy_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>
23ef59ef	29	#include <drm/drm_pci.h>
760285e7	30	#include <drm/drmP.h>
43fc884e	31	#include "drm_internal.h"
ba8286fa	32	#include "drm_legacy.h"
1da177e4	33
1da177e4	34	/**
c6a1af8a TR	35	* drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
	36	* @dev: DRM device
	37	* @size: size of block to allocate
	38	* @align: alignment of block
	39	*
23ef59ef DV	40	* FIXME: This is a needless abstraction of the Linux dma-api and should be
	41	* removed.
	42	*
c6a1af8a TR	43	* Return: A handle to the allocated memory block on success or NULL on
c6a1af8a TR	44	* failure.
1da177e4	45	*/
e6be8d9d	46	drm_dma_handle_t drm_pci_alloc(struct drm_device dev, size_t size, size_t align)
1da177e4	47	{
9c8da5eb	48	drm_dma_handle_t *dmah;
ddf19b97 DA	49	unsigned long addr;
ddf19b97 DA	50	size_t sz;
1da177e4 LT	51
	52	/* pci_alloc_consistent only guarantees alignment to the smallest
	53	* PAGE_SIZE order which is greater than or equal to the requested size.
	54	* Return NULL here for now to make sure nobody tries for larger alignment
	55	*/
	56	if (align > size)
	57	return NULL;
	58
9c8da5eb DA	59	dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
	60	if (!dmah)
	61	return NULL;
b5e89ed5	62
9c8da5eb	63	dmah->size = size;
ddf19b97	64	dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL \| __GFP_COMP);
1da177e4	65
9c8da5eb DA	66	if (dmah->vaddr == NULL) {
9c8da5eb DA	67	kfree(dmah);
1da177e4	68	return NULL;
9c8da5eb	69	}
1da177e4	70
9c8da5eb	71	memset(dmah->vaddr, 0, size);
1da177e4	72
ddf19b97 DA	73	/* XXX - Is virt_to_page() legal for consistent mem? */
	74	/* Reserve */
	75	for (addr = (unsigned long)dmah->vaddr, sz = size;
	76	sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
e1e78533	77	SetPageReserved(virt_to_page((void *)addr));
ddf19b97 DA	78	}
ddf19b97 DA	79
9c8da5eb	80	return dmah;
1da177e4	81	}
b5e89ed5	82
1da177e4 LT	83	EXPORT_SYMBOL(drm_pci_alloc);
1da177e4 LT	84
c6a1af8a TR	85	/*
c6a1af8a TR	86	* Free a PCI consistent memory block without freeing its descriptor.
9c8da5eb DA	87	*
9c8da5eb DA	88	* This function is for internal use in the Linux-specific DRM core code.
1da177e4	89	*/
1c96e84e	90	void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
1da177e4	91	{
ddf19b97 DA	92	unsigned long addr;
ddf19b97 DA	93	size_t sz;
1da177e4	94
9a298b2a	95	if (dmah->vaddr) {
ddf19b97 DA	96	/* XXX - Is virt_to_page() legal for consistent mem? */
	97	/* Unreserve */
	98	for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
	99	sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
e1e78533	100	ClearPageReserved(virt_to_page((void *)addr));
ddf19b97 DA	101	}
	102	dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
	103	dmah->busaddr);
1da177e4	104	}
1da177e4	105	}
9c8da5eb DA	106
9c8da5eb DA	107	/**
c6a1af8a TR	108	* drm_pci_free - Free a PCI consistent memory block
	109	* @dev: DRM device
	110	* @dmah: handle to memory block
23ef59ef DV	111	*
	112	* FIXME: This is a needless abstraction of the Linux dma-api and should be
	113	* removed.
9c8da5eb	114	*/
84b1fd10	115	void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
9c8da5eb	116	{
1c96e84e	117	__drm_legacy_pci_free(dev, dmah);
9c8da5eb DA	118	kfree(dmah);
9c8da5eb DA	119	}
b5e89ed5	120
1da177e4 LT	121	EXPORT_SYMBOL(drm_pci_free);
1da177e4 LT	122
dcdb1674	123	#ifdef CONFIG_PCI
8410ea3b DA	124
	125	static int drm_get_pci_domain(struct drm_device *dev)
	126	{
	127	#ifndef __alpha__
	128	/* For historical reasons, drm_get_pci_domain() is busticated
	129	* on most archs and has to remain so for userspace interface
	130	* < 1.4, except on alpha which was right from the beginning
	131	*/
	132	if (dev->if_version < 0x10004)
	133	return 0;
	134	#endif /* __alpha__ */
	135
	136	return pci_domain_nr(dev->pdev->bus);
	137	}
	138
915b4d11	139	int drm_pci_set_busid(struct drm_device dev, struct drm_master master)
8410ea3b	140	{
d0a39164 DH	141	master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
	142	drm_get_pci_domain(dev),
	143	dev->pdev->bus->number,
	144	PCI_SLOT(dev->pdev->devfn),
	145	PCI_FUNC(dev->pdev->devfn));
	146	if (!master->unique)
8410ea3b DA	147	return -ENOMEM;
8410ea3b DA	148
d0a39164	149	master->unique_len = strlen(master->unique);
8410ea3b	150	return 0;
8410ea3b DA	151	}
8410ea3b DA	152
45e97ab6	153	static int drm_pci_irq_by_busid(struct drm_device dev, struct drm_irq_busid p)
8410ea3b DA	154	{
	155	if ((p->busnum >> 8) != drm_get_pci_domain(dev) \|\|
	156	(p->busnum & 0xff) != dev->pdev->bus->number \|\|
	157	p->devnum != PCI_SLOT(dev->pdev->devfn) \|\| p->funcnum != PCI_FUNC(dev->pdev->devfn))
	158	return -EINVAL;
	159
	160	p->irq = dev->pdev->irq;
	161
	162	DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
	163	p->irq);
	164	return 0;
	165	}
	166
eaaf8f0f	167	/**
c6a1af8a TR	168	* drm_irq_by_busid - Get interrupt from bus ID
	169	* @dev: DRM device
	170	* @data: IOCTL parameter pointing to a drm_irq_busid structure
	171	* @file_priv: DRM file private.
eaaf8f0f DV	172	*
	173	* Finds the PCI device with the specified bus id and gets its IRQ number.
	174	* This IOCTL is deprecated, and will now return EINVAL for any busid not equal
	175	* to that of the device that this DRM instance attached to.
c6a1af8a TR	176	*
c6a1af8a TR	177	* Return: 0 on success or a negative error code on failure.
eaaf8f0f DV	178	*/
	179	int drm_irq_by_busid(struct drm_device dev, void data,
	180	struct drm_file *file_priv)
	181	{
	182	struct drm_irq_busid *p = data;
	183
fa538645	184	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
eaaf8f0f DV	185	return -EINVAL;
	186
	187	/* UMS was only ever support on PCI devices. */
	188	if (WARN_ON(!dev->pdev))
	189	return -EINVAL;
	190
	191	if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
	192	return -EINVAL;
	193
	194	return drm_pci_irq_by_busid(dev, p);
	195	}
	196
8da79ccd	197	static void drm_pci_agp_init(struct drm_device *dev)
8410ea3b	198	{
d9906753	199	if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
2ce0264d	200	if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
8410ea3b	201	dev->agp = drm_agp_init(dev);
28185647 DV	202	if (dev->agp) {
	203	dev->agp->agp_mtrr = arch_phys_wc_add(
	204	dev->agp->agp_info.aper_base,
	205	dev->agp->agp_info.aper_size *
	206	1024 * 1024);
8410ea3b DA	207	}
8410ea3b DA	208	}
8410ea3b DA	209	}
8410ea3b DA	210
4efafebe	211	void drm_pci_agp_destroy(struct drm_device *dev)
28ec711c	212	{
d9906753	213	if (dev->agp) {
28185647	214	arch_phys_wc_del(dev->agp->agp_mtrr);
366884b1	215	drm_legacy_agp_clear(dev);
d6e4b28b	216	kfree(dev->agp);
28ec711c DH	217	dev->agp = NULL;
	218	}
	219	}
	220
dcdb1674	221	/**
c6a1af8a TR	222	* drm_get_pci_dev - Register a PCI device with the DRM subsystem
	223	* @pdev: PCI device
	224	* @ent: entry from the PCI ID table that matches @pdev
	225	* @driver: DRM device driver
dcdb1674 JC	226	*
	227	* Attempt to gets inter module "drm" information. If we are first
	228	* then register the character device and inter module information.
	229	* Try and register, if we fail to register, backout previous work.
c6a1af8a	230	*
6e3f797c	231	* NOTE: This function is deprecated, please use drm_dev_alloc() and
ef40cbf9	232	* drm_dev_register() instead and remove your &drm_driver.load callback.
6e3f797c	233	*
c6a1af8a	234	* Return: 0 on success or a negative error code on failure.
dcdb1674 JC	235	*/
	236	int drm_get_pci_dev(struct pci_dev pdev, const struct pci_device_id ent,
	237	struct drm_driver *driver)
	238	{
	239	struct drm_device *dev;
	240	int ret;
	241
	242	DRM_DEBUG("\n");
	243
1bb72532	244	dev = drm_dev_alloc(driver, &pdev->dev);
0f288605 TG	245	if (IS_ERR(dev))
0f288605 TG	246	return PTR_ERR(dev);
dcdb1674 JC	247
	248	ret = pci_enable_device(pdev);
	249	if (ret)
c22f0ace	250	goto err_free;
dcdb1674	251
dcdb1674	252	dev->pdev = pdev;
dcdb1674 JC	253	#ifdef __alpha__
	254	dev->hose = pdev->sysdata;
	255	#endif
	256
c22f0ace	257	if (drm_core_check_feature(dev, DRIVER_MODESET))
dcdb1674	258	pci_set_drvdata(pdev, dev);
1793126f	259
2c695fa0	260	drm_pci_agp_init(dev);
2c695fa0	261
c22f0ace DH	262	ret = drm_dev_register(dev, ent->driver_data);
c22f0ace DH	263	if (ret)
2c695fa0	264	goto err_agp;
dcdb1674	265
b3f2333d DV	266	/* No locking needed since shadow-attach is single-threaded since it may
b3f2333d DV	267	* only be called from the per-driver module init hook. */
fa538645	268	if (drm_core_check_feature(dev, DRIVER_LEGACY))
b3f2333d DV	269	list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
b3f2333d DV	270
dcdb1674 JC	271	return 0;
dcdb1674 JC	272
2c695fa0	273	err_agp:
2c695fa0	274	drm_pci_agp_destroy(dev);
dcdb1674	275	pci_disable_device(pdev);
c22f0ace	276	err_free:
099d1c29	277	drm_dev_unref(dev);
dcdb1674 JC	278	return ret;
	279	}
	280	EXPORT_SYMBOL(drm_get_pci_dev);
	281
	282	/**
10631d72	283	* drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
c6a1af8a TR	284	* @driver: DRM device driver
c6a1af8a TR	285	* @pdriver: PCI device driver
dcdb1674	286	*
10631d72	287	* This is only used by legacy dri1 drivers and deprecated.
6e3f797c	288	*
c6a1af8a	289	* Return: 0 on success or a negative error code on failure.
dcdb1674	290	*/
10631d72	291	int drm_legacy_pci_init(struct drm_driver driver, struct pci_driver pdriver)
dcdb1674 JC	292	{
	293	struct pci_dev *pdev = NULL;
	294	const struct pci_device_id *pid;
	295	int i;
	296
8410ea3b DA	297	DRM_DEBUG("\n");
8410ea3b DA	298
10631d72 DV	299	if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
10631d72 DV	300	return -EINVAL;
dcdb1674 JC	301
dcdb1674 JC	302	/* If not using KMS, fall back to stealth mode manual scanning. */
b3f2333d	303	INIT_LIST_HEAD(&driver->legacy_dev_list);
8410ea3b DA	304	for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
8410ea3b DA	305	pid = &pdriver->id_table[i];
dcdb1674 JC	306
	307	/* Loop around setting up a DRM device for each PCI device
	308	* matching our ID and device class. If we had the internal
	309	* function that pci_get_subsys and pci_get_class used, we'd
	310	* be able to just pass pid in instead of doing a two-stage
	311	* thing.
	312	*/
	313	pdev = NULL;
	314	while ((pdev =
	315	pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
	316	pid->subdevice, pdev)) != NULL) {
	317	if ((pdev->class & pid->class_mask) != pid->class)
	318	continue;
	319
	320	/* stealth mode requires a manual probe */
	321	pci_dev_get(pdev);
	322	drm_get_pci_dev(pdev, pid, driver);
	323	}
	324	}
	325	return 0;
	326	}
10631d72	327	EXPORT_SYMBOL(drm_legacy_pci_init);
dcdb1674	328
f4297784 DA	329	int drm_pcie_get_speed_cap_mask(struct drm_device dev, u32 mask)
	330	{
	331	struct pci_dev *root;
dd66cc2e	332	u32 lnkcap, lnkcap2;
f4297784 DA	333
	334	*mask = 0;
	335	if (!dev->pdev)
	336	return -EINVAL;
	337
f4297784 DA	338	root = dev->pdev->bus->self;
f4297784 DA	339
f4297784 DA	340	/* we've been informed via and serverworks don't make the cut */
	341	if (root->vendor == PCI_VENDOR_ID_VIA \|\|
	342	root->vendor == PCI_VENDOR_ID_SERVERWORKS)
	343	return -EINVAL;
	344
dd66cc2e BH	345	pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
dd66cc2e BH	346	pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
f4297784	347
dd66cc2e	348	if (lnkcap2) { /* PCIe r3.0-compliant */
f4297784 DA	349	if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
	350	*mask \|= DRM_PCIE_SPEED_25;
	351	if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
	352	*mask \|= DRM_PCIE_SPEED_50;
	353	if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
	354	*mask \|= DRM_PCIE_SPEED_80;
dd66cc2e	355	} else { /* pre-r3.0 */
9fe0423e	356	if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
f4297784	357	*mask \|= DRM_PCIE_SPEED_25;
9fe0423e	358	if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
f8acf6f4	359	*mask \|= (DRM_PCIE_SPEED_25 \| DRM_PCIE_SPEED_50);
f4297784 DA	360	}
	361
	362	DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
	363	return 0;
	364	}
	365	EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
93711d8b	366
60d8edd4 AD	367	int drm_pcie_get_max_link_width(struct drm_device dev, u32 mlw)
	368	{
	369	struct pci_dev *root;
	370	u32 lnkcap;
	371
	372	*mlw = 0;
	373	if (!dev->pdev)
	374	return -EINVAL;
	375
	376	root = dev->pdev->bus->self;
	377
	378	pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
	379
	380	*mlw = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4;
	381
	382	DRM_INFO("probing mlw for device %x:%x = %x\n", root->vendor, root->device, lnkcap);
	383	return 0;
	384	}
	385	EXPORT_SYMBOL(drm_pcie_get_max_link_width);
	386
93711d8b BH	387	#else
93711d8b BH	388
4efafebe	389	void drm_pci_agp_destroy(struct drm_device *dev) {}
eaaf8f0f DV	390
	391	int drm_irq_by_busid(struct drm_device dev, void data,
	392	struct drm_file *file_priv)
	393	{
	394	return -EINVAL;
	395	}
93711d8b BH	396	#endif
93711d8b BH	397
c6a1af8a	398	/**
10631d72	399	* drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
c6a1af8a TR	400	* @driver: DRM device driver
	401	* @pdriver: PCI device driver
	402	*
10631d72 DV	403	* Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
10631d72 DV	404	* is deprecated and only used by dri1 drivers.
c6a1af8a	405	*/
10631d72	406	void drm_legacy_pci_exit(struct drm_driver driver, struct pci_driver pdriver)
93711d8b BH	407	{
	408	struct drm_device dev, tmp;
	409	DRM_DEBUG("\n");
	410
fa538645	411	if (!(driver->driver_features & DRIVER_LEGACY)) {
10631d72	412	WARN_ON(1);
93711d8b	413	} else {
b3f2333d DV	414	list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
b3f2333d DV	415	legacy_dev_list) {
b3f2333d	416	list_del(&dev->legacy_dev_list);
c94adc4a	417	drm_put_dev(dev);
b3f2333d	418	}
93711d8b BH	419	}
	420	DRM_INFO("Module unloaded\n");
	421	}
10631d72	422	EXPORT_SYMBOL(drm_legacy_pci_exit);