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
   9#include <linux/module.h>
  10#include <linux/console.h>
  11
  12#include <drm/drm_drv.h>
  13#include <drm/drm_file.h>
  14#include <drm/drm_ioctl.h>
  15#include <drm/drm_pci.h>
  16#include <drm/drm_pciids.h>
  17
  18#include "mgag200_drv.h"
  19
  20/*
  21 * This is the generic driver code. This binds the driver to the drm core,
  22 * which then performs further device association and calls our graphics init
  23 * functions
  24 */
  25int mgag200_modeset = -1;
  26
  27MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  28module_param_named(modeset, mgag200_modeset, int, 0400);
  29
  30static struct drm_driver driver;
  31
  32static const struct pci_device_id pciidlist[] = {
  33        { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
  34                G200_SE_A | MGAG200_FLAG_HW_BUG_NO_STARTADD},
  35        { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
  36        { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
  37        { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
  38        { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
  39        { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
  40        { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
  41        { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
  42        {0,}
  43};
  44
  45MODULE_DEVICE_TABLE(pci, pciidlist);
  46
  47
  48static int mga_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  49{
  50        drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "mgag200drmfb");
  51
  52        return drm_get_pci_dev(pdev, ent, &driver);
  53}
  54
  55static void mga_pci_remove(struct pci_dev *pdev)
  56{
  57        struct drm_device *dev = pci_get_drvdata(pdev);
  58
  59        drm_put_dev(dev);
  60}
  61
  62DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
  63
  64static bool mgag200_pin_bo_at_0(const struct mga_device *mdev)
  65{
  66        return mdev->flags & MGAG200_FLAG_HW_BUG_NO_STARTADD;
  67}
  68
  69int mgag200_driver_dumb_create(struct drm_file *file,
  70                               struct drm_device *dev,
  71                               struct drm_mode_create_dumb *args)
  72{
  73        struct mga_device *mdev = dev->dev_private;
  74        unsigned long pg_align;
  75
  76        if (WARN_ONCE(!dev->vram_mm, "VRAM MM not initialized"))
  77                return -EINVAL;
  78
  79        pg_align = 0ul;
  80
  81        /*
  82         * Aligning scanout buffers to the size of the video ram forces
  83         * placement at offset 0. Works around a bug where HW does not
  84         * respect 'startadd' field.
  85         */
  86        if (mgag200_pin_bo_at_0(mdev))
  87                pg_align = PFN_UP(mdev->mc.vram_size);
  88
  89        return drm_gem_vram_fill_create_dumb(file, dev, &dev->vram_mm->bdev,
  90                                             pg_align, false, args);
  91}
  92
  93static struct drm_driver driver = {
  94        .driver_features = DRIVER_GEM | DRIVER_MODESET,
  95        .load = mgag200_driver_load,
  96        .unload = mgag200_driver_unload,
  97        .fops = &mgag200_driver_fops,
  98        .name = DRIVER_NAME,
  99        .desc = DRIVER_DESC,
 100        .date = DRIVER_DATE,
 101        .major = DRIVER_MAJOR,
 102        .minor = DRIVER_MINOR,
 103        .patchlevel = DRIVER_PATCHLEVEL,
 104        .debugfs_init = drm_vram_mm_debugfs_init,
 105        .dumb_create = mgag200_driver_dumb_create,
 106        .dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset,
 107        .gem_prime_mmap = drm_gem_prime_mmap,
 108};
 109
 110static struct pci_driver mgag200_pci_driver = {
 111        .name = DRIVER_NAME,
 112        .id_table = pciidlist,
 113        .probe = mga_pci_probe,
 114        .remove = mga_pci_remove,
 115};
 116
 117static int __init mgag200_init(void)
 118{
 119        if (vgacon_text_force() && mgag200_modeset == -1)
 120                return -EINVAL;
 121
 122        if (mgag200_modeset == 0)
 123                return -EINVAL;
 124
 125        return pci_register_driver(&mgag200_pci_driver);
 126}
 127
 128static void __exit mgag200_exit(void)
 129{
 130        pci_unregister_driver(&mgag200_pci_driver);
 131}
 132
 133module_init(mgag200_init);
 134module_exit(mgag200_exit);
 135
 136MODULE_AUTHOR(DRIVER_AUTHOR);
 137MODULE_DESCRIPTION(DRIVER_DESC);
 138MODULE_LICENSE("GPL");
 139