Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 531 insertions, 0 deletions

diff --git a/drivers/char/drm/drm_drv.c b/drivers/char/drm/drm_drv.c
new file mode 100644
index 00000000000..1e37ed0c6b8
--- /dev/null
+++ b/drivers/char/drm/drm_drv.c
@@ -0,0 +1,531 @@
+/**
+ * \file drm_drv.h 
+ * Generic driver template
+ *
+ * \author Rickard E. (Rik) Faith <faith@valinux.com>
+ * \author Gareth Hughes <gareth@valinux.com>
+ *
+ * To use this template, you must at least define the following (samples
+ * given for the MGA driver):
+ *
+ * \code
+ * #define DRIVER_AUTHOR	"VA Linux Systems, Inc."
+ *
+ * #define DRIVER_NAME		"mga"
+ * #define DRIVER_DESC		"Matrox G200/G400"
+ * #define DRIVER_DATE		"20001127"
+ *
+ * #define DRIVER_IOCTL_COUNT	DRM_ARRAY_SIZE( mga_ioctls )
+ *
+ * #define drm_x		mga_##x
+ * \endcode
+ */
+
+/*
+ * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
+ *
+ * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "drmP.h"
+#include "drm_core.h"
+
+/** Ioctl table */
+drm_ioctl_desc_t		  drm_ioctls[] = {
+	[DRM_IOCTL_NR(DRM_IOCTL_VERSION)]       = { drm_version,     0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)]    = { drm_getunique,   0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)]     = { drm_getmagic,    0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)]     = { drm_irq_by_busid, 0, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)]       = { drm_getmap,      0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)]    = { drm_getclient,   0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)]     = { drm_getstats,    0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)]   = { drm_setversion,  0, 1 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)]    = { drm_setunique,   1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)]         = { drm_noop,        1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]       = { drm_noop,        1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)]    = { drm_authmagic,   1, 1 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]       = { drm_addmap,      1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)]        = { drm_rmmap,       1, 0 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { drm_setsareactx, 1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { drm_getsareactx, 1, 0 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]       = { drm_addctx,      1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]        = { drm_rmctx,       1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]       = { drm_modctx,      1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)]       = { drm_getctx,      1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)]    = { drm_switchctx,   1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)]       = { drm_newctx,      1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)]       = { drm_resctx,      1, 0 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)]      = { drm_adddraw,     1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)]       = { drm_rmdraw,      1, 1 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_LOCK)]	        = { drm_lock,        1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)]        = { drm_unlock,      1, 0 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_FINISH)]        = { drm_noop,      1, 0 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)]      = { drm_addbufs,     1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)]     = { drm_markbufs,    1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)]     = { drm_infobufs,    1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)]      = { drm_mapbufs,     1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)]     = { drm_freebufs,    1, 0 },
+	/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
+
+	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]       = { drm_control,     1, 1 },
+
+#if __OS_HAS_AGP
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)]   = { drm_agp_acquire, 1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)]   = { drm_agp_release, 1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)]    = { drm_agp_enable,  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)]      = { drm_agp_info,    1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)]     = { drm_agp_alloc,   1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)]      = { drm_agp_free,    1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)]      = { drm_agp_bind,    1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)]    = { drm_agp_unbind,  1, 1 },
+#endif
+
+	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)]      = { drm_sg_alloc,    1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)]       = { drm_sg_free,     1, 1 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)]   = { drm_wait_vblank, 0, 0 },
+};
+
+#define DRIVER_IOCTL_COUNT	DRM_ARRAY_SIZE( drm_ioctls )
+
+/**
+ * Take down the DRM device.
+ *
+ * \param dev DRM device structure.
+ *
+ * Frees every resource in \p dev.
+ *
+ * \sa drm_device and setup().
+ */
+int drm_takedown( drm_device_t *dev )
+{
+	drm_magic_entry_t *pt, *next;
+	drm_map_t *map;
+	drm_map_list_t *r_list;
+	struct list_head *list, *list_next;
+	drm_vma_entry_t *vma, *vma_next;
+	int i;
+
+	DRM_DEBUG( "\n" );
+
+	if (dev->driver->pretakedown)
+	  dev->driver->pretakedown(dev);
+
+	if (dev->unique) {
+		drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
+		dev->unique = NULL;
+		dev->unique_len = 0;
+	}
+
+	if ( dev->irq_enabled ) drm_irq_uninstall( dev );
+
+	down( &dev->struct_sem );
+	del_timer( &dev->timer );
+
+				/* Clear pid list */
+	for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) {
+		for ( pt = dev->magiclist[i].head ; pt ; pt = next ) {
+			next = pt->next;
+			drm_free( pt, sizeof(*pt), DRM_MEM_MAGIC );
+		}
+		dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
+	}
+
+				/* Clear AGP information */
+	if (drm_core_has_AGP(dev) && dev->agp) {
+		drm_agp_mem_t *entry;
+		drm_agp_mem_t *nexte;
+
+				/* Remove AGP resources, but leave dev->agp
+                                   intact until drv_cleanup is called. */
+		for ( entry = dev->agp->memory ; entry ; entry = nexte ) {
+			nexte = entry->next;
+			if ( entry->bound ) drm_unbind_agp( entry->memory );
+			drm_free_agp( entry->memory, entry->pages );
+			drm_free( entry, sizeof(*entry), DRM_MEM_AGPLISTS );
+		}
+		dev->agp->memory = NULL;
+
+		if ( dev->agp->acquired ) drm_agp_do_release(dev);
+
+		dev->agp->acquired = 0;
+		dev->agp->enabled  = 0;
+	}
+
+				/* Clear vma list (only built for debugging) */
+	if ( dev->vmalist ) {
+		for ( vma = dev->vmalist ; vma ; vma = vma_next ) {
+			vma_next = vma->next;
+			drm_free( vma, sizeof(*vma), DRM_MEM_VMAS );
+		}
+		dev->vmalist = NULL;
+	}
+
+	if( dev->maplist ) {
+		list_for_each_safe( list, list_next, &dev->maplist->head ) {
+			r_list = (drm_map_list_t *)list;
+
+			if ( ( map = r_list->map ) ) {
+				switch ( map->type ) {
+				case _DRM_REGISTERS:
+				case _DRM_FRAME_BUFFER:
+					if (drm_core_has_MTRR(dev)) {
+						if ( map->mtrr >= 0 ) {
+							int retcode;
+							retcode = mtrr_del( map->mtrr,
+									    map->offset,
+									    map->size );
+							DRM_DEBUG( "mtrr_del=%d\n", retcode );
+						}
+					}
+					drm_ioremapfree( map->handle, map->size, dev );
+					break;
+				case _DRM_SHM:
+					vfree(map->handle);
+					break;
+
+				case _DRM_AGP:
+					/* Do nothing here, because this is all
+					 * handled in the AGP/GART driver.
+					 */
+					break;
+				case _DRM_SCATTER_GATHER:
+					/* Handle it */
+					if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
+						drm_sg_cleanup(dev->sg);
+						dev->sg = NULL;
+					}
+					break;
+				}
+				drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+			}
+			list_del( list );
+			drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS);
+ 		}
+		drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
+		dev->maplist = NULL;
+ 	}
+
+	if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist ) {
+		for ( i = 0 ; i < dev->queue_count ; i++ ) {
+			if ( dev->queuelist[i] ) {
+				drm_free( dev->queuelist[i],
+					  sizeof(*dev->queuelist[0]),
+					  DRM_MEM_QUEUES );
+				dev->queuelist[i] = NULL;
+			}
+		}
+		drm_free( dev->queuelist,
+			  dev->queue_slots * sizeof(*dev->queuelist),
+			  DRM_MEM_QUEUES );
+		dev->queuelist = NULL;
+	}
+	dev->queue_count = 0;
+
+	if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
+		drm_dma_takedown( dev );
+
+	if ( dev->lock.hw_lock ) {
+		dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
+		dev->lock.filp = NULL;
+		wake_up_interruptible( &dev->lock.lock_queue );
+	}
+	up( &dev->struct_sem );
+
+	return 0;
+}
+
+
+
+/**
+ * Module initialization. Called via init_module at module load time, or via
+ * linux/init/main.c (this is not currently supported).
+ *
+ * \return zero on success or a negative number on failure.
+ *
+ * Initializes an array of drm_device structures, and attempts to
+ * initialize all available devices, using consecutive minors, registering the
+ * stubs and initializing the AGP device.
+ * 
+ * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
+ * after the initialization for driver customization.
+ */
+int drm_init( struct drm_driver *driver )
+{
+	struct pci_dev *pdev = NULL;
+	struct pci_device_id *pid;
+	int i;
+
+	DRM_DEBUG( "\n" );
+
+	drm_mem_init();
+
+	for (i=0; driver->pci_driver.id_table[i].vendor != 0; i++) {
+		pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];
+		
+		pdev=NULL;
+		/* pass back in pdev to account for multiple identical cards */		
+		while ((pdev = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, pid->subdevice, pdev)) != NULL) {
+			/* stealth mode requires a manual probe */
+			pci_dev_get(pdev);
+			drm_get_dev(pdev, pid, driver);
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL(drm_init);
+
+/**
+ * Called via cleanup_module() at module unload time.
+ *
+ * Cleans up all DRM device, calling takedown().
+ * 
+ * \sa drm_init().
+ */
+static void drm_cleanup( drm_device_t *dev )
+{
+	DRM_DEBUG( "\n" );
+
+	if (!dev) {
+		DRM_ERROR("cleanup called no dev\n");
+		return;
+	}
+
+	drm_takedown( dev );	
+
+	drm_ctxbitmap_cleanup( dev );
+	
+	if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
+	    dev->agp && dev->agp->agp_mtrr >= 0) {
+		int retval;
+		retval = mtrr_del( dev->agp->agp_mtrr,
+				   dev->agp->agp_info.aper_base,
+				   dev->agp->agp_info.aper_size*1024*1024 );
+		DRM_DEBUG( "mtrr_del=%d\n", retval );
+	}
+	
+	if (drm_core_has_AGP(dev) && dev->agp ) {
+		drm_free( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS );
+		dev->agp = NULL;
+	}
+
+	if (dev->driver->postcleanup)
+		dev->driver->postcleanup(dev);
+	
+	drm_put_head(&dev->primary);
+	if ( drm_put_dev(dev) )
+		DRM_ERROR( "Cannot unload module\n" );
+}
+
+void drm_exit (struct drm_driver *driver)
+{
+	int i;
+	drm_device_t *dev = NULL;
+	drm_head_t *head;
+	
+	DRM_DEBUG( "\n" );
+
+	for (i = 0; i < drm_cards_limit; i++) {
+		head = drm_heads[i];
+		if (!head)
+			continue;
+		if (!head->dev)
+			continue;
+		if (head->dev->driver!=driver)
+			continue;
+		dev=head->dev;
+	}
+	if (dev) {
+		/* release the pci driver */
+		if (dev->pdev)
+			pci_dev_put(dev->pdev);
+		drm_cleanup(dev);
+	}
+	DRM_INFO( "Module unloaded\n" );
+}
+EXPORT_SYMBOL(drm_exit);
+
+/** File operations structure */
+static struct file_operations drm_stub_fops = {
+	.owner = THIS_MODULE,
+	.open  = drm_stub_open
+};
+
+static int __init drm_core_init(void)
+{
+	int ret = -ENOMEM;
+	
+	drm_cards_limit = (drm_cards_limit < DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1);
+	drm_heads = drm_calloc(drm_cards_limit,
+				sizeof(*drm_heads), DRM_MEM_STUB);
+	if(!drm_heads) 
+		goto err_p1;
+	
+	if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
+		goto err_p1;
+	
+	drm_class = drm_sysfs_create(THIS_MODULE, "drm");
+	if (IS_ERR(drm_class)) {
+		printk (KERN_ERR "DRM: Error creating drm class.\n");
+		ret = PTR_ERR(drm_class);
+		goto err_p2;
+	}
+
+	drm_proc_root = create_proc_entry("dri", S_IFDIR, NULL);
+	if (!drm_proc_root) {
+		DRM_ERROR("Cannot create /proc/dri\n");
+		ret = -1;
+		goto err_p3;
+	}
+		
+	DRM_INFO( "Initialized %s %d.%d.%d %s\n",
+		CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL,
+		CORE_DATE);
+	return 0;
+err_p3:
+	drm_sysfs_destroy(drm_class);
+err_p2:
+	unregister_chrdev(DRM_MAJOR, "drm");
+	drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
+err_p1:	
+	return ret;
+}
+
+static void __exit drm_core_exit (void)
+{
+	remove_proc_entry("dri", NULL);
+	drm_sysfs_destroy(drm_class);
+
+	unregister_chrdev(DRM_MAJOR, "drm");
+
+	drm_free(drm_heads, sizeof(*drm_heads) *
+				drm_cards_limit, DRM_MEM_STUB);
+}
+
+
+module_init( drm_core_init );
+module_exit( drm_core_exit );
+
+
+/**
+ * Get version information
+ *
+ * \param inode device inode.
+ * \param filp file pointer.
+ * \param cmd command.
+ * \param arg user argument, pointing to a drm_version structure.
+ * \return zero on success or negative number on failure.
+ *
+ * Fills in the version information in \p arg.
+ */
+int drm_version( struct inode *inode, struct file *filp,
+		  unsigned int cmd, unsigned long arg )
+{
+	drm_file_t *priv = filp->private_data;
+	drm_device_t *dev = priv->head->dev;
+	drm_version_t __user *argp = (void __user *)arg;
+	drm_version_t version;
+	int ret;
+
+	if ( copy_from_user( &version, argp, sizeof(version) ) )
+		return -EFAULT;
+
+	/* version is a required function to return the personality module version */
+	if ((ret = dev->driver->version(&version)))
+		return ret;
+		
+	if ( copy_to_user( argp, &version, sizeof(version) ) )
+		return -EFAULT;
+	return 0;
+}
+
+
+
+/** 
+ * Called whenever a process performs an ioctl on /dev/drm.
+ *
+ * \param inode device inode.
+ * \param filp file pointer.
+ * \param cmd command.
+ * \param arg user argument.
+ * \return zero on success or negative number on failure.
+ *
+ * Looks up the ioctl function in the ::ioctls table, checking for root
+ * previleges if so required, and dispatches to the respective function.
+ */
+int drm_ioctl( struct inode *inode, struct file *filp,
+		unsigned int cmd, unsigned long arg )
+{
+	drm_file_t *priv = filp->private_data;
+	drm_device_t *dev = priv->head->dev;
+	drm_ioctl_desc_t *ioctl;
+	drm_ioctl_t *func;
+	unsigned int nr = DRM_IOCTL_NR(cmd);
+	int retcode = -EINVAL;
+
+	atomic_inc( &dev->ioctl_count );
+	atomic_inc( &dev->counts[_DRM_STAT_IOCTLS] );
+	++priv->ioctl_count;
+
+	DRM_DEBUG( "pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
+		   current->pid, cmd, nr, (long)old_encode_dev(priv->head->device), 
+		   priv->authenticated );
+	
+	if (nr < DRIVER_IOCTL_COUNT)
+		ioctl = &drm_ioctls[nr];
+	else if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
+		ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
+	else
+		goto err_i1;
+	
+	func = ioctl->func;
+	/* is there a local override? */
+	if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
+		func = dev->driver->dma_ioctl;
+	
+	if ( !func ) {
+		DRM_DEBUG( "no function\n" );
+		retcode = -EINVAL;
+	} else if ( ( ioctl->root_only && !capable( CAP_SYS_ADMIN ) )||
+		    ( ioctl->auth_needed && !priv->authenticated ) ) {
+		retcode = -EACCES;
+	} else {
+		retcode = func( inode, filp, cmd, arg );
+	}
+	
+err_i1:
+	atomic_dec( &dev->ioctl_count );
+	if (retcode) DRM_DEBUG( "ret = %x\n", retcode);
+	return retcode;
+}
+EXPORT_SYMBOL(drm_ioctl);
+