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/console.h> 10 #include <linux/module.h> 11 #include <linux/pci.h> 12 13 #include <drm/drm_drv.h> 14 #include <drm/drm_file.h> 15 #include <drm/drm_ioctl.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 */ 25 int mgag200_modeset = -1; 26 27 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting"); 28 module_param_named(modeset, mgag200_modeset, int, 0400); 29 30 static struct drm_driver driver; 31 32 static 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 45 MODULE_DEVICE_TABLE(pci, pciidlist); 46 47 48 static int mga_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 49 { 50 struct drm_device *dev; 51 int ret; 52 53 drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "mgag200drmfb"); 54 55 ret = pci_enable_device(pdev); 56 if (ret) 57 return ret; 58 59 dev = drm_dev_alloc(&driver, &pdev->dev); 60 if (IS_ERR(dev)) { 61 ret = PTR_ERR(dev); 62 goto err_pci_disable_device; 63 } 64 65 dev->pdev = pdev; 66 pci_set_drvdata(pdev, dev); 67 68 ret = mgag200_driver_load(dev, ent->driver_data); 69 if (ret) 70 goto err_drm_dev_put; 71 72 ret = drm_dev_register(dev, ent->driver_data); 73 if (ret) 74 goto err_mgag200_driver_unload; 75 76 return 0; 77 78 err_mgag200_driver_unload: 79 mgag200_driver_unload(dev); 80 err_drm_dev_put: 81 drm_dev_put(dev); 82 err_pci_disable_device: 83 pci_disable_device(pdev); 84 return ret; 85 } 86 87 static void mga_pci_remove(struct pci_dev *pdev) 88 { 89 struct drm_device *dev = pci_get_drvdata(pdev); 90 91 drm_dev_unregister(dev); 92 mgag200_driver_unload(dev); 93 drm_dev_put(dev); 94 } 95 96 DEFINE_DRM_GEM_FOPS(mgag200_driver_fops); 97 98 static bool mgag200_pin_bo_at_0(const struct mga_device *mdev) 99 { 100 return mdev->flags & MGAG200_FLAG_HW_BUG_NO_STARTADD; 101 } 102 103 int mgag200_driver_dumb_create(struct drm_file *file, 104 struct drm_device *dev, 105 struct drm_mode_create_dumb *args) 106 { 107 struct mga_device *mdev = dev->dev_private; 108 unsigned long pg_align; 109 110 if (WARN_ONCE(!dev->vram_mm, "VRAM MM not initialized")) 111 return -EINVAL; 112 113 pg_align = 0ul; 114 115 /* 116 * Aligning scanout buffers to the size of the video ram forces 117 * placement at offset 0. Works around a bug where HW does not 118 * respect 'startadd' field. 119 */ 120 if (mgag200_pin_bo_at_0(mdev)) 121 pg_align = PFN_UP(mdev->mc.vram_size); 122 123 return drm_gem_vram_fill_create_dumb(file, dev, &dev->vram_mm->bdev, 124 pg_align, false, args); 125 } 126 127 static struct drm_driver driver = { 128 .driver_features = DRIVER_GEM | DRIVER_MODESET, 129 .fops = &mgag200_driver_fops, 130 .name = DRIVER_NAME, 131 .desc = DRIVER_DESC, 132 .date = DRIVER_DATE, 133 .major = DRIVER_MAJOR, 134 .minor = DRIVER_MINOR, 135 .patchlevel = DRIVER_PATCHLEVEL, 136 .debugfs_init = drm_vram_mm_debugfs_init, 137 .dumb_create = mgag200_driver_dumb_create, 138 .dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset, 139 .gem_prime_mmap = drm_gem_prime_mmap, 140 }; 141 142 static struct pci_driver mgag200_pci_driver = { 143 .name = DRIVER_NAME, 144 .id_table = pciidlist, 145 .probe = mga_pci_probe, 146 .remove = mga_pci_remove, 147 }; 148 149 static int __init mgag200_init(void) 150 { 151 if (vgacon_text_force() && mgag200_modeset == -1) 152 return -EINVAL; 153 154 if (mgag200_modeset == 0) 155 return -EINVAL; 156 157 return pci_register_driver(&mgag200_pci_driver); 158 } 159 160 static void __exit mgag200_exit(void) 161 { 162 pci_unregister_driver(&mgag200_pci_driver); 163 } 164 165 module_init(mgag200_init); 166 module_exit(mgag200_exit); 167 168 MODULE_AUTHOR(DRIVER_AUTHOR); 169 MODULE_DESCRIPTION(DRIVER_DESC); 170 MODULE_LICENSE("GPL"); 171