Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */ |
| 2 | /** |
| 3 | * \file drm_pci.c |
| 4 | * \brief Functions and ioctls to manage PCI memory |
| 5 | * |
| 6 | * \warning These interfaces aren't stable yet. |
| 7 | * |
| 8 | * \todo Implement the remaining ioctl's for the PCI pools. |
| 9 | * \todo The wrappers here are so thin that they would be better off inlined.. |
| 10 | * |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 11 | * \author José Fonseca <jrfonseca@tungstengraphics.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * \author Leif Delgass <ldelgass@retinalburn.net> |
| 13 | */ |
| 14 | |
| 15 | /* |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 16 | * Copyright 2003 José Fonseca. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * Copyright 2003 Leif Delgass. |
| 18 | * All Rights Reserved. |
| 19 | * |
| 20 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 21 | * copy of this software and associated documentation files (the "Software"), |
| 22 | * to deal in the Software without restriction, including without limitation |
| 23 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 24 | * and/or sell copies of the Software, and to permit persons to whom the |
| 25 | * Software is furnished to do so, subject to the following conditions: |
| 26 | * |
| 27 | * The above copyright notice and this permission notice (including the next |
| 28 | * paragraph) shall be included in all copies or substantial portions of the |
| 29 | * Software. |
| 30 | * |
| 31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 32 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 33 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 34 | * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 35 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| 36 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 37 | */ |
| 38 | |
| 39 | #include <linux/pci.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Dave Airlie | 195b3a2 | 2006-04-05 18:12:18 +1000 | [diff] [blame] | 41 | #include <linux/dma-mapping.h> |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 42 | #include <linux/export.h> |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 43 | #include <drm/drmP.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | /**********************************************************************/ |
| 46 | /** \name PCI memory */ |
| 47 | /*@{*/ |
| 48 | |
| 49 | /** |
| 50 | * \brief Allocate a PCI consistent memory block, for DMA. |
| 51 | */ |
Zhenyu Wang | e6be8d9 | 2010-01-05 11:25:05 +0800 | [diff] [blame] | 52 | drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | { |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 54 | drm_dma_handle_t *dmah; |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 55 | #if 1 |
| 56 | unsigned long addr; |
| 57 | size_t sz; |
| 58 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /* pci_alloc_consistent only guarantees alignment to the smallest |
| 61 | * PAGE_SIZE order which is greater than or equal to the requested size. |
| 62 | * Return NULL here for now to make sure nobody tries for larger alignment |
| 63 | */ |
| 64 | if (align > size) |
| 65 | return NULL; |
| 66 | |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 67 | dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL); |
| 68 | if (!dmah) |
| 69 | return NULL; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 70 | |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 71 | dmah->size = size; |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 72 | dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 74 | if (dmah->vaddr == NULL) { |
| 75 | kfree(dmah); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | return NULL; |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 77 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 79 | memset(dmah->vaddr, 0, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 81 | /* XXX - Is virt_to_page() legal for consistent mem? */ |
| 82 | /* Reserve */ |
| 83 | for (addr = (unsigned long)dmah->vaddr, sz = size; |
| 84 | sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { |
| 85 | SetPageReserved(virt_to_page(addr)); |
| 86 | } |
| 87 | |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 88 | return dmah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | EXPORT_SYMBOL(drm_pci_alloc); |
| 92 | |
| 93 | /** |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 94 | * \brief Free a PCI consistent memory block without freeing its descriptor. |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 95 | * |
| 96 | * This function is for internal use in the Linux-specific DRM core code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 98 | void __drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 100 | #if 1 |
| 101 | unsigned long addr; |
| 102 | size_t sz; |
| 103 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 105 | if (dmah->vaddr) { |
Dave Airlie | ddf19b9 | 2006-03-19 18:56:12 +1100 | [diff] [blame] | 106 | /* XXX - Is virt_to_page() legal for consistent mem? */ |
| 107 | /* Unreserve */ |
| 108 | for (addr = (unsigned long)dmah->vaddr, sz = dmah->size; |
| 109 | sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { |
| 110 | ClearPageReserved(virt_to_page(addr)); |
| 111 | } |
| 112 | dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr, |
| 113 | dmah->busaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 116 | |
| 117 | /** |
| 118 | * \brief Free a PCI consistent memory block |
| 119 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 120 | void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 121 | { |
| 122 | __drm_pci_free(dev, dmah); |
| 123 | kfree(dmah); |
| 124 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | EXPORT_SYMBOL(drm_pci_free); |
| 127 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 128 | #ifdef CONFIG_PCI |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 129 | |
| 130 | static int drm_get_pci_domain(struct drm_device *dev) |
| 131 | { |
| 132 | #ifndef __alpha__ |
| 133 | /* For historical reasons, drm_get_pci_domain() is busticated |
| 134 | * on most archs and has to remain so for userspace interface |
| 135 | * < 1.4, except on alpha which was right from the beginning |
| 136 | */ |
| 137 | if (dev->if_version < 0x10004) |
| 138 | return 0; |
| 139 | #endif /* __alpha__ */ |
| 140 | |
| 141 | return pci_domain_nr(dev->pdev->bus); |
| 142 | } |
| 143 | |
| 144 | static int drm_pci_get_irq(struct drm_device *dev) |
| 145 | { |
| 146 | return dev->pdev->irq; |
| 147 | } |
| 148 | |
| 149 | static const char *drm_pci_get_name(struct drm_device *dev) |
| 150 | { |
| 151 | struct pci_driver *pdriver = dev->driver->kdriver.pci; |
| 152 | return pdriver->name; |
| 153 | } |
| 154 | |
| 155 | int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master) |
| 156 | { |
| 157 | int len, ret; |
| 158 | struct pci_driver *pdriver = dev->driver->kdriver.pci; |
| 159 | master->unique_len = 40; |
| 160 | master->unique_size = master->unique_len; |
| 161 | master->unique = kmalloc(master->unique_size, GFP_KERNEL); |
| 162 | if (master->unique == NULL) |
| 163 | return -ENOMEM; |
| 164 | |
| 165 | |
| 166 | len = snprintf(master->unique, master->unique_len, |
| 167 | "pci:%04x:%02x:%02x.%d", |
| 168 | drm_get_pci_domain(dev), |
| 169 | dev->pdev->bus->number, |
| 170 | PCI_SLOT(dev->pdev->devfn), |
| 171 | PCI_FUNC(dev->pdev->devfn)); |
| 172 | |
| 173 | if (len >= master->unique_len) { |
| 174 | DRM_ERROR("buffer overflow"); |
| 175 | ret = -EINVAL; |
| 176 | goto err; |
| 177 | } else |
| 178 | master->unique_len = len; |
| 179 | |
| 180 | dev->devname = |
| 181 | kmalloc(strlen(pdriver->name) + |
| 182 | master->unique_len + 2, GFP_KERNEL); |
| 183 | |
| 184 | if (dev->devname == NULL) { |
| 185 | ret = -ENOMEM; |
| 186 | goto err; |
| 187 | } |
| 188 | |
| 189 | sprintf(dev->devname, "%s@%s", pdriver->name, |
| 190 | master->unique); |
| 191 | |
| 192 | return 0; |
| 193 | err: |
| 194 | return ret; |
| 195 | } |
| 196 | |
| 197 | int drm_pci_set_unique(struct drm_device *dev, |
| 198 | struct drm_master *master, |
| 199 | struct drm_unique *u) |
| 200 | { |
| 201 | int domain, bus, slot, func, ret; |
| 202 | const char *bus_name; |
| 203 | |
| 204 | master->unique_len = u->unique_len; |
| 205 | master->unique_size = u->unique_len + 1; |
| 206 | master->unique = kmalloc(master->unique_size, GFP_KERNEL); |
| 207 | if (!master->unique) { |
| 208 | ret = -ENOMEM; |
| 209 | goto err; |
| 210 | } |
| 211 | |
| 212 | if (copy_from_user(master->unique, u->unique, master->unique_len)) { |
| 213 | ret = -EFAULT; |
| 214 | goto err; |
| 215 | } |
| 216 | |
| 217 | master->unique[master->unique_len] = '\0'; |
| 218 | |
| 219 | bus_name = dev->driver->bus->get_name(dev); |
| 220 | dev->devname = kmalloc(strlen(bus_name) + |
| 221 | strlen(master->unique) + 2, GFP_KERNEL); |
| 222 | if (!dev->devname) { |
| 223 | ret = -ENOMEM; |
| 224 | goto err; |
| 225 | } |
| 226 | |
| 227 | sprintf(dev->devname, "%s@%s", bus_name, |
| 228 | master->unique); |
| 229 | |
| 230 | /* Return error if the busid submitted doesn't match the device's actual |
| 231 | * busid. |
| 232 | */ |
| 233 | ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func); |
| 234 | if (ret != 3) { |
| 235 | ret = -EINVAL; |
| 236 | goto err; |
| 237 | } |
| 238 | |
| 239 | domain = bus >> 8; |
| 240 | bus &= 0xff; |
| 241 | |
| 242 | if ((domain != drm_get_pci_domain(dev)) || |
| 243 | (bus != dev->pdev->bus->number) || |
| 244 | (slot != PCI_SLOT(dev->pdev->devfn)) || |
| 245 | (func != PCI_FUNC(dev->pdev->devfn))) { |
| 246 | ret = -EINVAL; |
| 247 | goto err; |
| 248 | } |
| 249 | return 0; |
| 250 | err: |
| 251 | return ret; |
| 252 | } |
| 253 | |
| 254 | |
Wolfram Sang | 45e97ab | 2011-06-15 11:26:47 +0200 | [diff] [blame] | 255 | static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p) |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 256 | { |
| 257 | if ((p->busnum >> 8) != drm_get_pci_domain(dev) || |
| 258 | (p->busnum & 0xff) != dev->pdev->bus->number || |
| 259 | p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn)) |
| 260 | return -EINVAL; |
| 261 | |
| 262 | p->irq = dev->pdev->irq; |
| 263 | |
| 264 | DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum, |
| 265 | p->irq); |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | int drm_pci_agp_init(struct drm_device *dev) |
| 270 | { |
| 271 | if (drm_core_has_AGP(dev)) { |
| 272 | if (drm_pci_device_is_agp(dev)) |
| 273 | dev->agp = drm_agp_init(dev); |
| 274 | if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) |
| 275 | && (dev->agp == NULL)) { |
| 276 | DRM_ERROR("Cannot initialize the agpgart module.\n"); |
| 277 | return -EINVAL; |
| 278 | } |
| 279 | if (drm_core_has_MTRR(dev)) { |
| 280 | if (dev->agp) |
| 281 | dev->agp->agp_mtrr = |
| 282 | mtrr_add(dev->agp->agp_info.aper_base, |
| 283 | dev->agp->agp_info.aper_size * |
| 284 | 1024 * 1024, MTRR_TYPE_WRCOMB, 1); |
| 285 | } |
| 286 | } |
| 287 | return 0; |
| 288 | } |
| 289 | |
| 290 | static struct drm_bus drm_pci_bus = { |
| 291 | .bus_type = DRIVER_BUS_PCI, |
| 292 | .get_irq = drm_pci_get_irq, |
| 293 | .get_name = drm_pci_get_name, |
| 294 | .set_busid = drm_pci_set_busid, |
| 295 | .set_unique = drm_pci_set_unique, |
Wolfram Sang | 45e97ab | 2011-06-15 11:26:47 +0200 | [diff] [blame] | 296 | .irq_by_busid = drm_pci_irq_by_busid, |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 297 | .agp_init = drm_pci_agp_init, |
| 298 | }; |
| 299 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 300 | /** |
| 301 | * Register. |
| 302 | * |
| 303 | * \param pdev - PCI device structure |
| 304 | * \param ent entry from the PCI ID table with device type flags |
| 305 | * \return zero on success or a negative number on failure. |
| 306 | * |
| 307 | * Attempt to gets inter module "drm" information. If we are first |
| 308 | * then register the character device and inter module information. |
| 309 | * Try and register, if we fail to register, backout previous work. |
| 310 | */ |
| 311 | int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent, |
| 312 | struct drm_driver *driver) |
| 313 | { |
| 314 | struct drm_device *dev; |
| 315 | int ret; |
| 316 | |
| 317 | DRM_DEBUG("\n"); |
| 318 | |
| 319 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 320 | if (!dev) |
| 321 | return -ENOMEM; |
| 322 | |
| 323 | ret = pci_enable_device(pdev); |
| 324 | if (ret) |
| 325 | goto err_g1; |
| 326 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 327 | dev->pdev = pdev; |
| 328 | dev->dev = &pdev->dev; |
| 329 | |
| 330 | dev->pci_device = pdev->device; |
| 331 | dev->pci_vendor = pdev->vendor; |
| 332 | |
| 333 | #ifdef __alpha__ |
| 334 | dev->hose = pdev->sysdata; |
| 335 | #endif |
| 336 | |
Dave Airlie | b64c115 | 2010-09-14 20:14:38 +1000 | [diff] [blame] | 337 | mutex_lock(&drm_global_mutex); |
| 338 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 339 | if ((ret = drm_fill_in_dev(dev, ent, driver))) { |
| 340 | printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); |
| 341 | goto err_g2; |
| 342 | } |
| 343 | |
| 344 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 345 | pci_set_drvdata(pdev, dev); |
| 346 | ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); |
| 347 | if (ret) |
| 348 | goto err_g2; |
| 349 | } |
| 350 | |
| 351 | if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY))) |
| 352 | goto err_g3; |
| 353 | |
| 354 | if (dev->driver->load) { |
| 355 | ret = dev->driver->load(dev, ent->driver_data); |
| 356 | if (ret) |
| 357 | goto err_g4; |
| 358 | } |
| 359 | |
| 360 | /* setup the grouping for the legacy output */ |
| 361 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 362 | ret = drm_mode_group_init_legacy_group(dev, |
| 363 | &dev->primary->mode_group); |
| 364 | if (ret) |
| 365 | goto err_g4; |
| 366 | } |
| 367 | |
| 368 | list_add_tail(&dev->driver_item, &driver->device_list); |
| 369 | |
| 370 | DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n", |
| 371 | driver->name, driver->major, driver->minor, driver->patchlevel, |
| 372 | driver->date, pci_name(pdev), dev->primary->index); |
| 373 | |
Dave Airlie | b64c115 | 2010-09-14 20:14:38 +1000 | [diff] [blame] | 374 | mutex_unlock(&drm_global_mutex); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 375 | return 0; |
| 376 | |
| 377 | err_g4: |
| 378 | drm_put_minor(&dev->primary); |
| 379 | err_g3: |
| 380 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
| 381 | drm_put_minor(&dev->control); |
| 382 | err_g2: |
| 383 | pci_disable_device(pdev); |
| 384 | err_g1: |
| 385 | kfree(dev); |
Dave Airlie | b64c115 | 2010-09-14 20:14:38 +1000 | [diff] [blame] | 386 | mutex_unlock(&drm_global_mutex); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 387 | return ret; |
| 388 | } |
| 389 | EXPORT_SYMBOL(drm_get_pci_dev); |
| 390 | |
| 391 | /** |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 392 | * PCI device initialization. Called direct from modules at load time. |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 393 | * |
| 394 | * \return zero on success or a negative number on failure. |
| 395 | * |
| 396 | * Initializes a drm_device structures,registering the |
| 397 | * stubs and initializing the AGP device. |
| 398 | * |
| 399 | * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and |
| 400 | * after the initialization for driver customization. |
| 401 | */ |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 402 | int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver) |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 403 | { |
| 404 | struct pci_dev *pdev = NULL; |
| 405 | const struct pci_device_id *pid; |
| 406 | int i; |
| 407 | |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 408 | DRM_DEBUG("\n"); |
| 409 | |
| 410 | INIT_LIST_HEAD(&driver->device_list); |
| 411 | driver->kdriver.pci = pdriver; |
| 412 | driver->bus = &drm_pci_bus; |
| 413 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 414 | if (driver->driver_features & DRIVER_MODESET) |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 415 | return pci_register_driver(pdriver); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 416 | |
| 417 | /* If not using KMS, fall back to stealth mode manual scanning. */ |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 418 | for (i = 0; pdriver->id_table[i].vendor != 0; i++) { |
| 419 | pid = &pdriver->id_table[i]; |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 420 | |
| 421 | /* Loop around setting up a DRM device for each PCI device |
| 422 | * matching our ID and device class. If we had the internal |
| 423 | * function that pci_get_subsys and pci_get_class used, we'd |
| 424 | * be able to just pass pid in instead of doing a two-stage |
| 425 | * thing. |
| 426 | */ |
| 427 | pdev = NULL; |
| 428 | while ((pdev = |
| 429 | pci_get_subsys(pid->vendor, pid->device, pid->subvendor, |
| 430 | pid->subdevice, pdev)) != NULL) { |
| 431 | if ((pdev->class & pid->class_mask) != pid->class) |
| 432 | continue; |
| 433 | |
| 434 | /* stealth mode requires a manual probe */ |
| 435 | pci_dev_get(pdev); |
| 436 | drm_get_pci_dev(pdev, pid, driver); |
| 437 | } |
| 438 | } |
| 439 | return 0; |
| 440 | } |
| 441 | |
| 442 | #else |
| 443 | |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 444 | int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver) |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 445 | { |
| 446 | return -1; |
| 447 | } |
| 448 | |
| 449 | #endif |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 450 | |
| 451 | EXPORT_SYMBOL(drm_pci_init); |
| 452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | /*@}*/ |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 454 | void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver) |
| 455 | { |
| 456 | struct drm_device *dev, *tmp; |
| 457 | DRM_DEBUG("\n"); |
| 458 | |
| 459 | if (driver->driver_features & DRIVER_MODESET) { |
| 460 | pci_unregister_driver(pdriver); |
| 461 | } else { |
| 462 | list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item) |
| 463 | drm_put_dev(dev); |
| 464 | } |
| 465 | DRM_INFO("Module unloaded\n"); |
| 466 | } |
| 467 | EXPORT_SYMBOL(drm_pci_exit); |
Dave Airlie | f429778 | 2012-06-27 08:35:53 +0100 | [diff] [blame] | 468 | |
| 469 | int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask) |
| 470 | { |
| 471 | struct pci_dev *root; |
| 472 | int pos; |
| 473 | u32 lnkcap, lnkcap2; |
| 474 | |
| 475 | *mask = 0; |
| 476 | if (!dev->pdev) |
| 477 | return -EINVAL; |
| 478 | |
| 479 | if (!pci_is_pcie(dev->pdev)) |
| 480 | return -EINVAL; |
| 481 | |
| 482 | root = dev->pdev->bus->self; |
| 483 | |
| 484 | pos = pci_pcie_cap(root); |
| 485 | if (!pos) |
| 486 | return -EINVAL; |
| 487 | |
| 488 | /* we've been informed via and serverworks don't make the cut */ |
| 489 | if (root->vendor == PCI_VENDOR_ID_VIA || |
| 490 | root->vendor == PCI_VENDOR_ID_SERVERWORKS) |
| 491 | return -EINVAL; |
| 492 | |
| 493 | pci_read_config_dword(root, pos + PCI_EXP_LNKCAP, &lnkcap); |
| 494 | pci_read_config_dword(root, pos + PCI_EXP_LNKCAP2, &lnkcap2); |
| 495 | |
| 496 | lnkcap &= PCI_EXP_LNKCAP_SLS; |
| 497 | lnkcap2 &= 0xfe; |
| 498 | |
| 499 | if (lnkcap2) { /* PCIE GEN 3.0 */ |
| 500 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB) |
| 501 | *mask |= DRM_PCIE_SPEED_25; |
| 502 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB) |
| 503 | *mask |= DRM_PCIE_SPEED_50; |
| 504 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB) |
| 505 | *mask |= DRM_PCIE_SPEED_80; |
| 506 | } else { |
| 507 | if (lnkcap & 1) |
| 508 | *mask |= DRM_PCIE_SPEED_25; |
| 509 | if (lnkcap & 2) |
| 510 | *mask |= DRM_PCIE_SPEED_50; |
| 511 | } |
| 512 | |
| 513 | DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2); |
| 514 | return 0; |
| 515 | } |
| 516 | EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask); |