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/* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */

/**

 * \file drm_pci.c

 * \brief Functions and ioctls to manage PCI memory

 *

 * \warning These interfaces aren't stable yet.

 *

 * \todo Implement the remaining ioctl's for the PCI pools.

 * \todo The wrappers here are so thin that they would be better off inlined..

 *

 * \author José Fonseca 

 * \author Leif Delgass 

 */

/*

 * 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 

//#include 

//#include 

#include 

#include 

#include 

/**********************************************************************/

/** \name PCI memory */

/*@{*/

/**

 * \brief Allocate a PCI consistent memory block, for DMA.

 */

drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)

{

	drm_dma_handle_t *dmah;

#if 1

	unsigned long addr;

	size_t sz;

#endif

	/* 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 = (void*)KernelAlloc(size);

    dmah->busaddr = GetPgAddr(dmah->vaddr);

	if (dmah->vaddr == NULL) {

		kfree(dmah);

		return NULL;

	}

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

	return dmah;

}

EXPORT_SYMBOL(drm_pci_alloc);

#if 0

/**

 * \brief 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_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(addr));

		}

		dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,

				  dmah->busaddr);

	}

}

/**

 * \brief Free a PCI consistent memory block

 */

void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)

{

	__drm_pci_free(dev, dmah);

	kfree(dmah);

}

EXPORT_SYMBOL(drm_pci_free);

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);

}

static int drm_pci_get_irq(struct drm_device *dev)

{

	return dev->pdev->irq;

}

static const char *drm_pci_get_name(struct drm_device *dev)

{

	struct pci_driver *pdriver = dev->driver->kdriver.pci;

	return pdriver->name;

}

static int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)

{

	int len, ret;

	struct pci_driver *pdriver = dev->driver->kdriver.pci;

	master->unique_len = 40;

	master->unique_size = master->unique_len;

	master->unique = kmalloc(master->unique_size, GFP_KERNEL);

	if (master->unique == NULL)

		return -ENOMEM;

	len = snprintf(master->unique, master->unique_len,

		       "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 (len >= master->unique_len) {

		DRM_ERROR("buffer overflow");

		ret = -EINVAL;

		goto err;

	} else

		master->unique_len = len;

	dev->devname =

		kmalloc(strlen(pdriver->name) +

			master->unique_len + 2, GFP_KERNEL);

	if (dev->devname == NULL) {

		ret = -ENOMEM;

		goto err;

	}

	sprintf(dev->devname, "%s@%s", pdriver->name,

		master->unique);

	return 0;

err:

	return ret;

}

static int drm_pci_set_unique(struct drm_device *dev,

			      struct drm_master *master,

			      struct drm_unique *u)

{

	int domain, bus, slot, func, ret;

	const char *bus_name;

	master->unique_len = u->unique_len;

	master->unique_size = u->unique_len + 1;

	master->unique = kmalloc(master->unique_size, 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';

	bus_name = dev->driver->bus->get_name(dev);

	dev->devname = kmalloc(strlen(bus_name) +

			       strlen(master->unique) + 2, GFP_KERNEL);

	if (!dev->devname) {

		ret = -ENOMEM;

		goto err;

	}

	sprintf(dev->devname, "%s@%s", bus_name,

		master->unique);

	/* 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;

}

static int drm_pci_agp_init(struct drm_device *dev)

{

	if (drm_core_has_AGP(dev)) {

		if (drm_pci_device_is_agp(dev))

			dev->agp = drm_agp_init(dev);

		if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)

		    && (dev->agp == NULL)) {

			DRM_ERROR("Cannot initialize the agpgart module.\n");

			return -EINVAL;

		}

		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);

		}

	}

	return 0;

}

static void drm_pci_agp_destroy(struct drm_device *dev)

{

	if (drm_core_has_AGP(dev) && dev->agp) {

		arch_phys_wc_del(dev->agp->agp_mtrr);

		drm_agp_clear(dev);

		drm_agp_destroy(dev->agp);

		dev->agp = NULL;

	}

}

static struct drm_bus drm_pci_bus = {

	.bus_type = DRIVER_BUS_PCI,

	.get_irq = drm_pci_get_irq,

	.get_name = drm_pci_get_name,

	.set_busid = drm_pci_set_busid,

	.set_unique = drm_pci_set_unique,

	.irq_by_busid = drm_pci_irq_by_busid,

	.agp_init = drm_pci_agp_init,

	.agp_destroy = drm_pci_agp_destroy,

};

#endif

/**

 * Register.

 *

 * \param pdev - PCI device structure

 * \param ent entry from the PCI ID table with device type flags

 * \return zero on success or a negative number on failure.

 *

 * 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.

 */

int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,

		    struct drm_driver *driver)

{

    static struct drm_device drm_dev;

    static struct drm_file   drm_file;

	struct drm_device *dev;

    struct drm_file   *priv;

	int ret;

    dev  = &drm_dev;

    priv = &drm_file;

    drm_file_handlers[0] = priv;

 //   ret = pci_enable_device(pdev);

 //   if (ret)

 //       goto err_g1;

    pci_set_master(pdev);

    if ((ret = drm_fill_in_dev(dev, ent, driver))) {

        printk(KERN_ERR "DRM: Fill_in_dev failed.\n");

        goto err_g2;

    }

	DRM_DEBUG("\n");

	dev->pdev = pdev;

	dev->pci_device = pdev->device;

	dev->pci_vendor = pdev->vendor;

#ifdef __alpha__

	dev->hose = pdev->sysdata;

#endif

//   mutex_lock(&drm_global_mutex);

	if ((ret = drm_fill_in_dev(dev, ent, driver))) {

		printk(KERN_ERR "DRM: Fill_in_dev failed.\n");

		goto err_g2;

	}

#if 0

	if (drm_core_check_feature(dev, DRIVER_MODESET)) {

		pci_set_drvdata(pdev, dev);

		ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);

		if (ret)

			goto err_g2;

	}

	if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {

		ret = drm_get_minor(dev, &dev->render, DRM_MINOR_RENDER);

		if (ret)

			goto err_g21;

	}

	if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))

		goto err_g3;

#endif

	if (dev->driver->load) {

		ret = dev->driver->load(dev, ent->driver_data);

		if (ret)

			goto err_g4;

	}

    if (dev->driver->open) {

        ret = dev->driver->open(dev, priv);

        if (ret < 0)

            goto err_g4;

    }

//   mutex_unlock(&drm_global_mutex);

	return 0;

err_g4:

//   drm_put_minor(&dev->primary);

err_g3:

//   if (dev->render)

//       drm_put_minor(&dev->render);

err_g21:

//   if (drm_core_check_feature(dev, DRIVER_MODESET))

//       drm_put_minor(&dev->control);

err_g2:

//   pci_disable_device(pdev);

err_g1:

//   kfree(dev);

//   mutex_unlock(&drm_global_mutex);

	return ret;

}

EXPORT_SYMBOL(drm_get_pci_dev);

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;

    return -EINVAL;

#if 0

	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;

#endif

}

EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);