Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /** |
| 2 | * \file drm_stub.h |
| 3 | * Stub support |
| 4 | * |
| 5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org |
| 10 | * |
| 11 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. |
| 12 | * All Rights Reserved. |
| 13 | * |
| 14 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 15 | * copy of this software and associated documentation files (the "Software"), |
| 16 | * to deal in the Software without restriction, including without limitation |
| 17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 18 | * and/or sell copies of the Software, and to permit persons to whom the |
| 19 | * Software is furnished to do so, subject to the following conditions: |
| 20 | * |
| 21 | * The above copyright notice and this permission notice (including the next |
| 22 | * paragraph) shall be included in all copies or substantial portions of the |
| 23 | * Software. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 28 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 29 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 30 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 31 | * DEALINGS IN THE SOFTWARE. |
| 32 | */ |
| 33 | |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/moduleparam.h> |
| 36 | #include "drmP.h" |
| 37 | #include "drm_core.h" |
| 38 | |
| 39 | unsigned int drm_cards_limit = 16; /* Enough for one machine */ |
| 40 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
| 41 | EXPORT_SYMBOL(drm_debug); |
| 42 | |
| 43 | MODULE_AUTHOR( CORE_AUTHOR ); |
| 44 | MODULE_DESCRIPTION( CORE_DESC ); |
| 45 | MODULE_LICENSE("GPL and additional rights"); |
| 46 | MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards"); |
| 47 | MODULE_PARM_DESC(debug, "Enable debug output"); |
| 48 | |
| 49 | module_param_named(cards_limit, drm_cards_limit, int, 0444); |
Dave Jones | c075814 | 2005-10-03 15:02:20 -0400 | [diff] [blame^] | 50 | module_param_named(debug, drm_debug, int, 0600); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | drm_head_t **drm_heads; |
| 53 | struct drm_sysfs_class *drm_class; |
| 54 | struct proc_dir_entry *drm_proc_root; |
| 55 | |
| 56 | static int drm_fill_in_dev(drm_device_t *dev, struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver *driver) |
| 57 | { |
| 58 | int retcode; |
| 59 | |
| 60 | spin_lock_init(&dev->count_lock); |
| 61 | init_timer( &dev->timer ); |
| 62 | sema_init( &dev->struct_sem, 1 ); |
| 63 | sema_init( &dev->ctxlist_sem, 1 ); |
| 64 | |
| 65 | dev->pdev = pdev; |
| 66 | |
| 67 | #ifdef __alpha__ |
| 68 | dev->hose = pdev->sysdata; |
| 69 | dev->pci_domain = dev->hose->bus->number; |
| 70 | #else |
| 71 | dev->pci_domain = 0; |
| 72 | #endif |
| 73 | dev->pci_bus = pdev->bus->number; |
| 74 | dev->pci_slot = PCI_SLOT(pdev->devfn); |
| 75 | dev->pci_func = PCI_FUNC(pdev->devfn); |
| 76 | dev->irq = pdev->irq; |
| 77 | |
Dave Airlie | 836cf04 | 2005-07-10 19:27:04 +1000 | [diff] [blame] | 78 | dev->maplist = drm_calloc(1, sizeof(*dev->maplist), DRM_MEM_MAPS); |
| 79 | if (dev->maplist == NULL) |
| 80 | return -ENOMEM; |
| 81 | INIT_LIST_HEAD(&dev->maplist->head); |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | /* the DRM has 6 basic counters */ |
| 84 | dev->counters = 6; |
| 85 | dev->types[0] = _DRM_STAT_LOCK; |
| 86 | dev->types[1] = _DRM_STAT_OPENS; |
| 87 | dev->types[2] = _DRM_STAT_CLOSES; |
| 88 | dev->types[3] = _DRM_STAT_IOCTLS; |
| 89 | dev->types[4] = _DRM_STAT_LOCKS; |
| 90 | dev->types[5] = _DRM_STAT_UNLOCKS; |
| 91 | |
| 92 | dev->driver = driver; |
| 93 | |
| 94 | if (dev->driver->preinit) |
| 95 | if ((retcode = dev->driver->preinit(dev, ent->driver_data))) |
| 96 | goto error_out_unreg; |
| 97 | |
| 98 | if (drm_core_has_AGP(dev)) { |
Dave Airlie | cda1738 | 2005-07-10 17:31:26 +1000 | [diff] [blame] | 99 | if (drm_device_is_agp(dev)) |
| 100 | dev->agp = drm_agp_init(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) { |
| 102 | DRM_ERROR( "Cannot initialize the agpgart module.\n" ); |
| 103 | retcode = -EINVAL; |
| 104 | goto error_out_unreg; |
| 105 | } |
| 106 | if (drm_core_has_MTRR(dev)) { |
| 107 | if (dev->agp) |
| 108 | dev->agp->agp_mtrr = mtrr_add( dev->agp->agp_info.aper_base, |
| 109 | dev->agp->agp_info.aper_size*1024*1024, |
| 110 | MTRR_TYPE_WRCOMB, |
| 111 | 1 ); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | retcode = drm_ctxbitmap_init( dev ); |
| 116 | if( retcode ) { |
| 117 | DRM_ERROR( "Cannot allocate memory for context bitmap.\n" ); |
| 118 | goto error_out_unreg; |
| 119 | } |
| 120 | |
| 121 | return 0; |
| 122 | |
| 123 | error_out_unreg: |
| 124 | drm_takedown(dev); |
| 125 | return retcode; |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * File \c open operation. |
| 130 | * |
| 131 | * \param inode device inode. |
| 132 | * \param filp file pointer. |
| 133 | * |
| 134 | * Puts the dev->fops corresponding to the device minor number into |
| 135 | * \p filp, call the \c open method, and restore the file operations. |
| 136 | */ |
| 137 | int drm_stub_open(struct inode *inode, struct file *filp) |
| 138 | { |
| 139 | drm_device_t *dev = NULL; |
| 140 | int minor = iminor(inode); |
| 141 | int err = -ENODEV; |
| 142 | struct file_operations *old_fops; |
| 143 | |
| 144 | DRM_DEBUG("\n"); |
| 145 | |
| 146 | if (!((minor >= 0) && (minor < drm_cards_limit))) |
| 147 | return -ENODEV; |
| 148 | |
| 149 | if (!drm_heads[minor]) |
| 150 | return -ENODEV; |
| 151 | |
| 152 | if (!(dev = drm_heads[minor]->dev)) |
| 153 | return -ENODEV; |
| 154 | |
| 155 | old_fops = filp->f_op; |
| 156 | filp->f_op = fops_get(&dev->driver->fops); |
| 157 | if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { |
| 158 | fops_put(filp->f_op); |
| 159 | filp->f_op = fops_get(old_fops); |
| 160 | } |
| 161 | fops_put(old_fops); |
| 162 | |
| 163 | return err; |
| 164 | } |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | /** |
| 167 | * Get a secondary minor number. |
| 168 | * |
| 169 | * \param dev device data structure |
| 170 | * \param sec-minor structure to hold the assigned minor |
| 171 | * \return negative number on failure. |
| 172 | * |
| 173 | * Search an empty entry and initialize it to the given parameters, and |
| 174 | * create the proc init entry via proc_init(). This routines assigns |
| 175 | * minor numbers to secondary heads of multi-headed cards |
| 176 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 177 | static int drm_get_head(drm_device_t *dev, drm_head_t *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
| 179 | drm_head_t **heads = drm_heads; |
| 180 | int ret; |
| 181 | int minor; |
| 182 | |
| 183 | DRM_DEBUG("\n"); |
| 184 | |
| 185 | for (minor = 0; minor < drm_cards_limit; minor++, heads++) { |
| 186 | if (!*heads) { |
| 187 | |
| 188 | *head = (drm_head_t) { |
| 189 | .dev = dev, |
| 190 | .device = MKDEV(DRM_MAJOR, minor), |
| 191 | .minor = minor, |
| 192 | }; |
| 193 | |
| 194 | if ((ret = drm_proc_init(dev, minor, drm_proc_root, &head->dev_root))) { |
| 195 | printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n"); |
| 196 | goto err_g1; |
| 197 | } |
| 198 | |
| 199 | |
| 200 | head->dev_class = drm_sysfs_device_add(drm_class, |
| 201 | MKDEV(DRM_MAJOR, |
| 202 | minor), |
| 203 | &dev->pdev->dev, |
| 204 | "card%d", minor); |
| 205 | if (IS_ERR(head->dev_class)) { |
| 206 | printk(KERN_ERR "DRM: Error sysfs_device_add.\n"); |
| 207 | ret = PTR_ERR(head->dev_class); |
| 208 | goto err_g2; |
| 209 | } |
| 210 | *heads = head; |
| 211 | |
| 212 | DRM_DEBUG("new minor assigned %d\n", minor); |
| 213 | return 0; |
| 214 | } |
| 215 | } |
| 216 | DRM_ERROR("out of minors\n"); |
| 217 | return -ENOMEM; |
| 218 | err_g2: |
| 219 | drm_proc_cleanup(minor, drm_proc_root, head->dev_root); |
| 220 | err_g1: |
| 221 | *head = (drm_head_t) {.dev = NULL}; |
| 222 | return ret; |
| 223 | } |
| 224 | |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 225 | /** |
| 226 | * Register. |
| 227 | * |
| 228 | * \param pdev - PCI device structure |
| 229 | * \param ent entry from the PCI ID table with device type flags |
| 230 | * \return zero on success or a negative number on failure. |
| 231 | * |
| 232 | * Attempt to gets inter module "drm" information. If we are first |
| 233 | * then register the character device and inter module information. |
| 234 | * Try and register, if we fail to register, backout previous work. |
| 235 | */ |
| 236 | int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent, |
| 237 | struct drm_driver *driver) |
| 238 | { |
| 239 | drm_device_t *dev; |
| 240 | int ret; |
| 241 | |
| 242 | DRM_DEBUG("\n"); |
| 243 | |
| 244 | dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB); |
| 245 | if (!dev) |
| 246 | return -ENOMEM; |
| 247 | |
| 248 | pci_enable_device(pdev); |
| 249 | |
| 250 | if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) { |
| 251 | printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); |
| 252 | goto err_g1; |
| 253 | } |
| 254 | if ((ret = drm_get_head(dev, &dev->primary))) |
| 255 | goto err_g1; |
| 256 | |
| 257 | /* postinit is a required function to display the signon banner */ |
| 258 | /* drivers add secondary heads here if needed */ |
| 259 | if ((ret = dev->driver->postinit(dev, ent->driver_data))) |
| 260 | goto err_g1; |
| 261 | |
| 262 | return 0; |
| 263 | |
| 264 | err_g1: |
| 265 | drm_free(dev, sizeof(*dev), DRM_MEM_STUB); |
| 266 | return ret; |
| 267 | } |
| 268 | EXPORT_SYMBOL(drm_get_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | /** |
| 271 | * Put a device minor number. |
| 272 | * |
| 273 | * \param dev device data structure |
| 274 | * \return always zero |
| 275 | * |
| 276 | * Cleans up the proc resources. If it is the last minor then release the foreign |
| 277 | * "drm" data, otherwise unregisters the "drm" data, frees the dev list and |
| 278 | * unregisters the character device. |
| 279 | */ |
| 280 | int drm_put_dev(drm_device_t * dev) |
| 281 | { |
| 282 | DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name); |
| 283 | |
| 284 | if (dev->unique) { |
| 285 | drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER); |
| 286 | dev->unique = NULL; |
| 287 | dev->unique_len = 0; |
| 288 | } |
| 289 | if (dev->devname) { |
| 290 | drm_free(dev->devname, strlen(dev->devname) + 1, |
| 291 | DRM_MEM_DRIVER); |
| 292 | dev->devname = NULL; |
| 293 | } |
| 294 | drm_free(dev, sizeof(*dev), DRM_MEM_STUB); |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Put a secondary minor number. |
| 300 | * |
| 301 | * \param sec_minor - structure to be released |
| 302 | * \return always zero |
| 303 | * |
| 304 | * Cleans up the proc resources. Not legal for this to be the |
| 305 | * last minor released. |
| 306 | * |
| 307 | */ |
| 308 | int drm_put_head(drm_head_t *head) |
| 309 | { |
| 310 | int minor = head->minor; |
| 311 | |
| 312 | DRM_DEBUG("release secondary minor %d\n", minor); |
| 313 | |
| 314 | drm_proc_cleanup(minor, drm_proc_root, head->dev_root); |
| 315 | drm_sysfs_device_remove(MKDEV(DRM_MAJOR, head->minor)); |
| 316 | |
| 317 | *head = (drm_head_t){.dev = NULL}; |
| 318 | |
| 319 | drm_heads[minor] = NULL; |
| 320 | |
| 321 | return 0; |
| 322 | } |
| 323 | |