drm: reorganise drm tree to be more future proof.

With the coming of kernel based modesetting and the memory manager stuff,
the everything in one directory approach was getting very ugly and
starting to be unmanageable.

This restructures the drm along the lines of other kernel components.

It creates a drivers/gpu/drm directory and moves the hw drivers into
subdirectores. It moves the includes into an include/drm, and
sets up the unifdef for the userspace headers we should be exporting.

Signed-off-by: Dave Airlie <airlied@redhat.com>

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;
+}