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3031 serge 1
/* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */
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/**
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 * \file drm_pci.c
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 * \brief Functions and ioctls to manage PCI memory
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 *
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 * \warning These interfaces aren't stable yet.
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 *
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 * \todo Implement the remaining ioctl's for the PCI pools.
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 * \todo The wrappers here are so thin that they would be better off inlined..
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 *
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 * \author José Fonseca 
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 * \author Leif Delgass 
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 */
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/*
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 * Copyright 2003 José Fonseca.
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 * Copyright 2003 Leif Delgass.
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 * All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice (including the next
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 * paragraph) shall be included in all copies or substantial portions of the
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 * Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
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 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 */
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//#include 
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//#include 
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//#include 
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#include 
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#include 
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#include 
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/**********************************************************************/
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/** \name PCI memory */
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/*@{*/
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/**
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 * \brief Allocate a PCI consistent memory block, for DMA.
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 */
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drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
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{
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	drm_dma_handle_t *dmah;
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#if 1
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	unsigned long addr;
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	size_t sz;
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#endif
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	/* pci_alloc_consistent only guarantees alignment to the smallest
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	 * PAGE_SIZE order which is greater than or equal to the requested size.
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	 * Return NULL here for now to make sure nobody tries for larger alignment
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	 */
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	if (align > size)
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		return NULL;
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	dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
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	if (!dmah)
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		return NULL;
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	dmah->size = size;
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    dmah->vaddr = (void*)KernelAlloc(size);
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    dmah->busaddr = GetPgAddr(dmah->vaddr);
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	if (dmah->vaddr == NULL) {
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		kfree(dmah);
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		return NULL;
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	}
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	memset(dmah->vaddr, 0, size);
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	return dmah;
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}
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int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
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{
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	struct pci_dev *root;
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	u32 lnkcap, lnkcap2;
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	*mask = 0;
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	if (!dev->pdev)
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		return -EINVAL;
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	if (!pci_is_pcie(dev->pdev))
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		return -EINVAL;
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    return -EINVAL;
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#if 0
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	root = dev->pdev->bus->self;
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3480 Serge 105
	/* we've been informed via and serverworks don't make the cut */
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	if (root->vendor == PCI_VENDOR_ID_VIA ||
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	    root->vendor == PCI_VENDOR_ID_SERVERWORKS)
3031 serge 108
		return -EINVAL;
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3480 Serge 110
	pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
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	pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
3031 serge 112
 
3480 Serge 113
	if (lnkcap2) {	/* PCIe r3.0-compliant */
3031 serge 114
		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
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			*mask |= DRM_PCIE_SPEED_25;
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		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
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			*mask |= DRM_PCIE_SPEED_50;
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		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
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			*mask |= DRM_PCIE_SPEED_80;
3480 Serge 120
	} else {	/* pre-r3.0 */
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		if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
3031 serge 122
			*mask |= DRM_PCIE_SPEED_25;
3480 Serge 123
		if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
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			*mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
3031 serge 125
	}
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	DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
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	return 0;
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#endif
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}
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EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);