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 int mgag200_hw_bug_no_startadd = -1; 31 MODULE_PARM_DESC(modeset, "HW does not interpret scanout-buffer start address correctly"); 32 module_param_named(hw_bug_no_startadd, mgag200_hw_bug_no_startadd, int, 0400); 33 34 static struct drm_driver driver; 35 36 static const struct pci_device_id pciidlist[] = { 37 { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 38 G200_SE_A | MGAG200_FLAG_HW_BUG_NO_STARTADD}, 39 { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B }, 40 { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV }, 41 { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB }, 42 { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH }, 43 { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER }, 44 { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 }, 45 { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 }, 46 {0,} 47 }; 48 49 MODULE_DEVICE_TABLE(pci, pciidlist); 50 51 52 static int mga_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 53 { 54 struct drm_device *dev; 55 int ret; 56 57 drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "mgag200drmfb"); 58 59 ret = pci_enable_device(pdev); 60 if (ret) 61 return ret; 62 63 dev = drm_dev_alloc(&driver, &pdev->dev); 64 if (IS_ERR(dev)) { 65 ret = PTR_ERR(dev); 66 goto err_pci_disable_device; 67 } 68 69 dev->pdev = pdev; 70 pci_set_drvdata(pdev, dev); 71 72 ret = mgag200_driver_load(dev, ent->driver_data); 73 if (ret) 74 goto err_drm_dev_put; 75 76 ret = drm_dev_register(dev, ent->driver_data); 77 if (ret) 78 goto err_mgag200_driver_unload; 79 80 drm_fbdev_generic_setup(dev, 0); 81 82 return 0; 83 84 err_mgag200_driver_unload: 85 mgag200_driver_unload(dev); 86 err_drm_dev_put: 87 drm_dev_put(dev); 88 err_pci_disable_device: 89 pci_disable_device(pdev); 90 return ret; 91 } 92 93 static void mga_pci_remove(struct pci_dev *pdev) 94 { 95 struct drm_device *dev = pci_get_drvdata(pdev); 96 97 drm_dev_unregister(dev); 98 mgag200_driver_unload(dev); 99 drm_dev_put(dev); 100 } 101 102 DEFINE_DRM_GEM_FOPS(mgag200_driver_fops); 103 104 static bool mgag200_pin_bo_at_0(const struct mga_device *mdev) 105 { 106 if (mgag200_hw_bug_no_startadd > 0) { 107 DRM_WARN_ONCE("Option hw_bug_no_startradd is enabled. Please " 108 "report the output of 'lspci -vvnn' to " 109 "<dri-devel@lists.freedesktop.org> if this " 110 "option is required to make mgag200 work " 111 "correctly on your system.\n"); 112 return true; 113 } else if (!mgag200_hw_bug_no_startadd) { 114 return false; 115 } 116 return mdev->flags & MGAG200_FLAG_HW_BUG_NO_STARTADD; 117 } 118 119 int mgag200_driver_dumb_create(struct drm_file *file, 120 struct drm_device *dev, 121 struct drm_mode_create_dumb *args) 122 { 123 struct mga_device *mdev = to_mga_device(dev); 124 unsigned long pg_align; 125 126 if (WARN_ONCE(!dev->vram_mm, "VRAM MM not initialized")) 127 return -EINVAL; 128 129 pg_align = 0ul; 130 131 /* 132 * Aligning scanout buffers to the size of the video ram forces 133 * placement at offset 0. Works around a bug where HW does not 134 * respect 'startadd' field. 135 */ 136 if (mgag200_pin_bo_at_0(mdev)) 137 pg_align = PFN_UP(mdev->mc.vram_size); 138 139 return drm_gem_vram_fill_create_dumb(file, dev, pg_align, 0, args); 140 } 141 142 static struct drm_driver driver = { 143 .driver_features = DRIVER_GEM | DRIVER_MODESET, 144 .fops = &mgag200_driver_fops, 145 .name = DRIVER_NAME, 146 .desc = DRIVER_DESC, 147 .date = DRIVER_DATE, 148 .major = DRIVER_MAJOR, 149 .minor = DRIVER_MINOR, 150 .patchlevel = DRIVER_PATCHLEVEL, 151 .debugfs_init = drm_vram_mm_debugfs_init, 152 .dumb_create = mgag200_driver_dumb_create, 153 .dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset, 154 .gem_prime_mmap = drm_gem_prime_mmap, 155 }; 156 157 static struct pci_driver mgag200_pci_driver = { 158 .name = DRIVER_NAME, 159 .id_table = pciidlist, 160 .probe = mga_pci_probe, 161 .remove = mga_pci_remove, 162 }; 163 164 static int __init mgag200_init(void) 165 { 166 if (vgacon_text_force() && mgag200_modeset == -1) 167 return -EINVAL; 168 169 if (mgag200_modeset == 0) 170 return -EINVAL; 171 172 return pci_register_driver(&mgag200_pci_driver); 173 } 174 175 static void __exit mgag200_exit(void) 176 { 177 pci_unregister_driver(&mgag200_pci_driver); 178 } 179 180 module_init(mgag200_init); 181 module_exit(mgag200_exit); 182 183 MODULE_AUTHOR(DRIVER_AUTHOR); 184 MODULE_DESCRIPTION(DRIVER_DESC); 185 MODULE_LICENSE("GPL"); 186