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path: root/drivers/gpu/drm/drm_stub.c
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Diffstat (limited to 'drivers/gpu/drm/drm_stub.c')
-rw-r--r--drivers/gpu/drm/drm_stub.c331
1 files changed, 331 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
new file mode 100644
index 000000000000..c2f584f3b46c
--- /dev/null
+++ b/drivers/gpu/drm/drm_stub.c
@@ -0,0 +1,331 @@
+/**
+ * \file drm_stub.h
+ * Stub support
+ *
+ * \author Rickard E. (Rik) Faith <faith@valinux.com>
+ */
+
+/*
+ * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
+ *
+ * Copyright 2001 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
+ * PRECISION INSIGHT 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 <linux/module.h>
+#include <linux/moduleparam.h>
+#include "drmP.h"
+#include "drm_core.h"
+
+unsigned int drm_debug = 0; /* 1 to enable debug output */
+EXPORT_SYMBOL(drm_debug);
+
+MODULE_AUTHOR(CORE_AUTHOR);
+MODULE_DESCRIPTION(CORE_DESC);
+MODULE_LICENSE("GPL and additional rights");
+MODULE_PARM_DESC(debug, "Enable debug output");
+
+module_param_named(debug, drm_debug, int, 0600);
+
+struct idr drm_minors_idr;
+
+struct class *drm_class;
+struct proc_dir_entry *drm_proc_root;
+
+static int drm_minor_get_id(struct drm_device *dev, int type)
+{
+ int new_id;
+ int ret;
+ int base = 0, limit = 63;
+
+again:
+ if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
+ DRM_ERROR("Out of memory expanding drawable idr\n");
+ return -ENOMEM;
+ }
+ mutex_lock(&dev->struct_mutex);
+ ret = idr_get_new_above(&drm_minors_idr, NULL,
+ base, &new_id);
+ mutex_unlock(&dev->struct_mutex);
+ if (ret == -EAGAIN) {
+ goto again;
+ } else if (ret) {
+ return ret;
+ }
+
+ if (new_id >= limit) {
+ idr_remove(&drm_minors_idr, new_id);
+ return -EINVAL;
+ }
+ return new_id;
+}
+
+static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
+ const struct pci_device_id *ent,
+ struct drm_driver *driver)
+{
+ int retcode;
+
+ INIT_LIST_HEAD(&dev->filelist);
+ INIT_LIST_HEAD(&dev->ctxlist);
+ INIT_LIST_HEAD(&dev->vmalist);
+ INIT_LIST_HEAD(&dev->maplist);
+
+ spin_lock_init(&dev->count_lock);
+ spin_lock_init(&dev->drw_lock);
+ spin_lock_init(&dev->tasklet_lock);
+ spin_lock_init(&dev->lock.spinlock);
+ init_timer(&dev->timer);
+ mutex_init(&dev->struct_mutex);
+ mutex_init(&dev->ctxlist_mutex);
+
+ idr_init(&dev->drw_idr);
+
+ dev->pdev = pdev;
+ dev->pci_device = pdev->device;
+ dev->pci_vendor = pdev->vendor;
+
+#ifdef __alpha__
+ dev->hose = pdev->sysdata;
+#endif
+ dev->irq = pdev->irq;
+
+ if (drm_ht_create(&dev->map_hash, 12)) {
+ return -ENOMEM;
+ }
+
+ /* the DRM has 6 basic counters */
+ dev->counters = 6;
+ dev->types[0] = _DRM_STAT_LOCK;
+ dev->types[1] = _DRM_STAT_OPENS;
+ dev->types[2] = _DRM_STAT_CLOSES;
+ dev->types[3] = _DRM_STAT_IOCTLS;
+ dev->types[4] = _DRM_STAT_LOCKS;
+ dev->types[5] = _DRM_STAT_UNLOCKS;
+
+ dev->driver = driver;
+
+ if (drm_core_has_AGP(dev)) {
+ if (drm_device_is_agp(dev))
+ dev->agp = drm_agp_init(dev);
+ if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
+ && (dev->agp == NULL)) {
+ DRM_ERROR("Cannot initialize the agpgart module.\n");
+ retcode = -EINVAL;
+ goto error_out_unreg;
+ }
+ if (drm_core_has_MTRR(dev)) {
+ if (dev->agp)
+ dev->agp->agp_mtrr =
+ mtrr_add(dev->agp->agp_info.aper_base,
+ dev->agp->agp_info.aper_size *
+ 1024 * 1024, MTRR_TYPE_WRCOMB, 1);
+ }
+ }
+
+ if (dev->driver->load)
+ if ((retcode = dev->driver->load(dev, ent->driver_data)))
+ goto error_out_unreg;
+
+ retcode = drm_ctxbitmap_init(dev);
+ if (retcode) {
+ DRM_ERROR("Cannot allocate memory for context bitmap.\n");
+ goto error_out_unreg;
+ }
+
+ return 0;
+
+ error_out_unreg:
+ drm_lastclose(dev);
+ return retcode;
+}
+
+
+/**
+ * Get a secondary minor number.
+ *
+ * \param dev device data structure
+ * \param sec-minor structure to hold the assigned minor
+ * \return negative number on failure.
+ *
+ * Search an empty entry and initialize it to the given parameters, and
+ * create the proc init entry via proc_init(). This routines assigns
+ * minor numbers to secondary heads of multi-headed cards
+ */
+static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
+{
+ struct drm_minor *new_minor;
+ int ret;
+ int minor_id;
+
+ DRM_DEBUG("\n");
+
+ minor_id = drm_minor_get_id(dev, type);
+ if (minor_id < 0)
+ return minor_id;
+
+ new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
+ if (!new_minor) {
+ ret = -ENOMEM;
+ goto err_idr;
+ }
+
+ new_minor->type = type;
+ new_minor->device = MKDEV(DRM_MAJOR, minor_id);
+ new_minor->dev = dev;
+ new_minor->index = minor_id;
+
+ idr_replace(&drm_minors_idr, new_minor, minor_id);
+
+ if (type == DRM_MINOR_LEGACY) {
+ ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
+ if (ret) {
+ DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
+ goto err_mem;
+ }
+ } else
+ new_minor->dev_root = NULL;
+
+ ret = drm_sysfs_device_add(new_minor);
+ if (ret) {
+ printk(KERN_ERR
+ "DRM: Error sysfs_device_add.\n");
+ goto err_g2;
+ }
+ *minor = new_minor;
+
+ DRM_DEBUG("new minor assigned %d\n", minor_id);
+ return 0;
+
+
+err_g2:
+ if (new_minor->type == DRM_MINOR_LEGACY)
+ drm_proc_cleanup(new_minor, drm_proc_root);
+err_mem:
+ kfree(new_minor);
+err_idr:
+ idr_remove(&drm_minors_idr, minor_id);
+ *minor = NULL;
+ return ret;
+}
+
+/**
+ * Register.
+ *
+ * \param pdev - PCI device structure
+ * \param ent entry from the PCI ID table with device type flags
+ * \return zero on success or a negative number on failure.
+ *
+ * Attempt to gets inter module "drm" information. If we are first
+ * then register the character device and inter module information.
+ * Try and register, if we fail to register, backout previous work.
+ */
+int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
+ struct drm_driver *driver)
+{
+ struct drm_device *dev;
+ int ret;
+
+ DRM_DEBUG("\n");
+
+ dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
+ if (!dev)
+ return -ENOMEM;
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ goto err_g1;
+
+ pci_set_master(pdev);
+ if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
+ printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
+ goto err_g2;
+ }
+ if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
+ goto err_g2;
+
+ DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
+ driver->name, driver->major, driver->minor, driver->patchlevel,
+ driver->date, dev->primary->index);
+
+ return 0;
+
+err_g2:
+ pci_disable_device(pdev);
+err_g1:
+ drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
+ return ret;
+}
+
+/**
+ * Put a device minor number.
+ *
+ * \param dev device data structure
+ * \return always zero
+ *
+ * Cleans up the proc resources. If it is the last minor then release the foreign
+ * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
+ * unregisters the character device.
+ */
+int drm_put_dev(struct drm_device * dev)
+{
+ DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
+
+ if (dev->unique) {
+ drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
+ dev->unique = NULL;
+ dev->unique_len = 0;
+ }
+ if (dev->devname) {
+ drm_free(dev->devname, strlen(dev->devname) + 1,
+ DRM_MEM_DRIVER);
+ dev->devname = NULL;
+ }
+ drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
+ return 0;
+}
+
+/**
+ * Put a secondary minor number.
+ *
+ * \param sec_minor - structure to be released
+ * \return always zero
+ *
+ * Cleans up the proc resources. Not legal for this to be the
+ * last minor released.
+ *
+ */
+int drm_put_minor(struct drm_minor **minor_p)
+{
+ struct drm_minor *minor = *minor_p;
+ DRM_DEBUG("release secondary minor %d\n", minor->index);
+
+ if (minor->type == DRM_MINOR_LEGACY)
+ drm_proc_cleanup(minor, drm_proc_root);
+ drm_sysfs_device_remove(minor);
+
+ idr_remove(&drm_minors_idr, minor->index);
+
+ kfree(minor);
+ *minor_p = NULL;
+ return 0;
+}