LXR linux/drivers/gpu/drm/mgag200/mgag200

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright 2012 Red Hat
   4 *
   5 * Authors: Matthew Garrett
   6 *          Dave Airlie
   7 */
   8#include <linux/module.h>
   9#include <linux/console.h>
  10#include <drm/drmP.h>
  11
  12#include "mgag200_drv.h"
  13
  14#include <drm/drm_pciids.h>
  15
  16/*
  17 * This is the generic driver code. This binds the driver to the drm core,
  18 * which then performs further device association and calls our graphics init
  19 * functions
  20 */
  21int mgag200_modeset = -1;
  22
  23MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  24module_param_named(modeset, mgag200_modeset, int, 0400);
  25
  26static struct drm_driver driver;
  27
  28static const struct pci_device_id pciidlist[] = {
  29        { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
  30                G200_SE_A | MGAG200_FLAG_HW_BUG_NO_STARTADD},
  31        { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
  32        { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
  33        { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
  34        { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
  35        { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
  36        { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
  37        { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
  38        {0,}
  39};
  40
  41MODULE_DEVICE_TABLE(pci, pciidlist);
  42
  43
  44static int mga_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  45{
  46        drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "mgag200drmfb");
  47
  48        return drm_get_pci_dev(pdev, ent, &driver);
  49}
  50
  51static void mga_pci_remove(struct pci_dev *pdev)
  52{
  53        struct drm_device *dev = pci_get_drvdata(pdev);
  54
  55        drm_put_dev(dev);
  56}
  57
  58static const struct file_operations mgag200_driver_fops = {
  59        .owner = THIS_MODULE,
  60        DRM_VRAM_MM_FILE_OPERATIONS
  61};
  62
  63static bool mgag200_pin_bo_at_0(const struct mga_device *mdev)
  64{
  65        return mdev->flags & MGAG200_FLAG_HW_BUG_NO_STARTADD;
  66}
  67
  68int mgag200_driver_dumb_create(struct drm_file *file,
  69                               struct drm_device *dev,
  70                               struct drm_mode_create_dumb *args)
  71{
  72        struct mga_device *mdev = dev->dev_private;
  73        unsigned long pg_align;
  74
  75        if (WARN_ONCE(!dev->vram_mm, "VRAM MM not initialized"))
  76                return -EINVAL;
  77
  78        pg_align = 0ul;
  79
  80        /*
  81         * Aligning scanout buffers to the size of the video ram forces
  82         * placement at offset 0. Works around a bug where HW does not
  83         * respect 'startadd' field.
  84         */
  85        if (mgag200_pin_bo_at_0(mdev))
  86                pg_align = PFN_UP(mdev->mc.vram_size);
  87
  88        return drm_gem_vram_fill_create_dumb(file, dev, &dev->vram_mm->bdev,
  89                                             pg_align, false, args);
  90}
  91
  92static struct drm_driver driver = {
  93        .driver_features = DRIVER_GEM | DRIVER_MODESET,
  94        .load = mgag200_driver_load,
  95        .unload = mgag200_driver_unload,
  96        .fops = &mgag200_driver_fops,
  97        .name = DRIVER_NAME,
  98        .desc = DRIVER_DESC,
  99        .date = DRIVER_DATE,
 100        .major = DRIVER_MAJOR,
 101        .minor = DRIVER_MINOR,
 102        .patchlevel = DRIVER_PATCHLEVEL,
 103        .dumb_create = mgag200_driver_dumb_create,
 104        .dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset,
 105        .gem_prime_mmap = drm_gem_prime_mmap,
 106};
 107
 108static struct pci_driver mgag200_pci_driver = {
 109        .name = DRIVER_NAME,
 110        .id_table = pciidlist,
 111        .probe = mga_pci_probe,
 112        .remove = mga_pci_remove,
 113};
 114
 115static int __init mgag200_init(void)
 116{
 117        if (vgacon_text_force() && mgag200_modeset == -1)
 118                return -EINVAL;
 119
 120        if (mgag200_modeset == 0)
 121                return -EINVAL;
 122
 123        return pci_register_driver(&mgag200_pci_driver);
 124}
 125
 126static void __exit mgag200_exit(void)
 127{
 128        pci_unregister_driver(&mgag200_pci_driver);
 129}
 130
 131module_init(mgag200_init);
 132module_exit(mgag200_exit);
 133
 134MODULE_AUTHOR(DRIVER_AUTHOR);
 135MODULE_DESCRIPTION(DRIVER_DESC);
 136MODULE_LICENSE("GPL");
 137