forked from Minki/linux
e08e96de98
From fdf1fdebaa00f81de18c227f32f8074c8b352d50 Mon Sep 17 00:00:00 2001 From: Arjan van de Ven <arjan@linux.intel.com> Date: Sun, 30 Oct 2011 19:06:07 -0700 Subject: [PATCH] drm: Make the per-driver file_operations struct const The DRM layer keeps a copy of struct file_operations inside its big driver struct... which prevents it from being consistent and static. For consistency (and the general security objective of having such things static), it's desirable to get this fixed. This patch splits out the file_operations field to its own struct, which is then "static const", and just stick a pointer to this into the driver struct, making it more consistent with how the rest of the kernel does this. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
146 lines
4.4 KiB
C
146 lines
4.4 KiB
C
/* mga_drv.c -- Matrox G200/G400 driver -*- linux-c -*-
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* Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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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
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rickard E. (Rik) Faith <faith@valinux.com>
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* Gareth Hughes <gareth@valinux.com>
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*/
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#include <linux/module.h>
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#include "drmP.h"
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#include "drm.h"
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#include "mga_drm.h"
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#include "mga_drv.h"
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#include "drm_pciids.h"
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static int mga_driver_device_is_agp(struct drm_device *dev);
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static struct pci_device_id pciidlist[] = {
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mga_PCI_IDS
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};
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static const struct file_operations mga_driver_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.release = drm_release,
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.unlocked_ioctl = drm_ioctl,
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.mmap = drm_mmap,
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.poll = drm_poll,
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.fasync = drm_fasync,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = mga_compat_ioctl,
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#endif
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.llseek = noop_llseek,
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};
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static struct drm_driver driver = {
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.driver_features =
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DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA |
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DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED,
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.dev_priv_size = sizeof(drm_mga_buf_priv_t),
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.load = mga_driver_load,
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.unload = mga_driver_unload,
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.lastclose = mga_driver_lastclose,
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.dma_quiescent = mga_driver_dma_quiescent,
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.device_is_agp = mga_driver_device_is_agp,
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.get_vblank_counter = mga_get_vblank_counter,
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.enable_vblank = mga_enable_vblank,
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.disable_vblank = mga_disable_vblank,
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.irq_preinstall = mga_driver_irq_preinstall,
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.irq_postinstall = mga_driver_irq_postinstall,
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.irq_uninstall = mga_driver_irq_uninstall,
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.irq_handler = mga_driver_irq_handler,
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.reclaim_buffers = drm_core_reclaim_buffers,
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.ioctls = mga_ioctls,
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.dma_ioctl = mga_dma_buffers,
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.fops = &mga_driver_fops,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = DRIVER_DATE,
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.major = DRIVER_MAJOR,
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.minor = DRIVER_MINOR,
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.patchlevel = DRIVER_PATCHLEVEL,
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};
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static struct pci_driver mga_pci_driver = {
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.name = DRIVER_NAME,
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.id_table = pciidlist,
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};
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static int __init mga_init(void)
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{
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driver.num_ioctls = mga_max_ioctl;
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return drm_pci_init(&driver, &mga_pci_driver);
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}
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static void __exit mga_exit(void)
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{
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drm_pci_exit(&driver, &mga_pci_driver);
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}
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module_init(mga_init);
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module_exit(mga_exit);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL and additional rights");
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/**
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* Determine if the device really is AGP or not.
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*
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* In addition to the usual tests performed by \c drm_device_is_agp, this
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* function detects PCI G450 cards that appear to the system exactly like
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* AGP G450 cards.
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*
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* \param dev The device to be tested.
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*
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* \returns
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* If the device is a PCI G450, zero is returned. Otherwise 2 is returned.
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*/
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static int mga_driver_device_is_agp(struct drm_device *dev)
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{
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const struct pci_dev *const pdev = dev->pdev;
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/* There are PCI versions of the G450. These cards have the
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* same PCI ID as the AGP G450, but have an additional PCI-to-PCI
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* bridge chip. We detect these cards, which are not currently
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* supported by this driver, by looking at the device ID of the
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* bus the "card" is on. If vendor is 0x3388 (Hint Corp) and the
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* device is 0x0021 (HB6 Universal PCI-PCI bridge), we reject the
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* device.
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*/
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if ((pdev->device == 0x0525) && pdev->bus->self
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&& (pdev->bus->self->vendor == 0x3388)
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&& (pdev->bus->self->device == 0x0021)) {
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return 0;
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}
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return 2;
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}
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