1 files changed, 358 insertions, 0 deletions
diff --git a/nx-X11/extras/drm/linux/drm_stub.h b/nx-X11/extras/drm/linux/drm_stub.h
new file mode 100644
index 000000000..a09f08b89
--- /dev/null
+++ b/nx-X11/extras/drm/linux/drm_stub.h
@@ -0,0 +1,358 @@
+/**
+ * \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 "drmP.h"
+
+static unsigned int cards_limit = 16;	/* Enough for one machine */
+static unsigned int debug = 0;		/* 1 to enable debug output */
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL and additional rights");
+MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards");
+MODULE_PARM_DESC(debug, "Enable debug output");
+
+module_param(cards_limit, int, 0444);
+module_param(debug, int, 0666);
+
+drm_global_t *DRM(global);
+
+/**
+ * File \c open operation.
+ *
+ * \param inode device inode.
+ * \param filp file pointer.
+ *
+ * Puts the dev->fops corresponding to the device minor number into
+ * \p filp, call the \c open method, and restore the file operations.
+ */
+static int stub_open(struct inode *inode, struct file *filp)
+{
+	drm_device_t *dev = NULL;
+	int minor = iminor(inode);
+	int err = -ENODEV;
+	struct file_operations *old_fops;
+	
+	DRM_DEBUG("\n");
+
+	if (!((minor >= 0) && (minor < DRM(global)->cards_limit)))
+		return -ENODEV;
+
+	dev = DRM(global)->minors[minor].dev;
+	if (!dev)
+		return -ENODEV;
+
+	old_fops = filp->f_op;
+	filp->f_op = fops_get(dev->fops);
+	if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) {
+		fops_put(filp->f_op);
+		filp->f_op = fops_get(old_fops);
+	}
+	fops_put(old_fops);
+
+	return err;
+}
+
+/** File operations structure */
+static struct file_operations DRM(stub_fops) = {
+	.owner = THIS_MODULE,
+	.open  = stub_open
+};
+
+
+/**
+ * Get a device minor number.
+ *
+ * \param pdev PCI device structure
+ * \param ent entry from the PCI ID table with device type flags
+ * \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().
+ */
+static int get_minor(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct class_device *dev_class;
+	drm_device_t *dev;
+	int ret;
+	int minor;
+	drm_minor_t *minors = &DRM(global)->minors[0];
+
+	DRM_DEBUG("\n");
+
+	for (minor = 0; minor < DRM(global)->cards_limit; minor++, minors++) {
+		if (minors->class == DRM_MINOR_FREE) {
+
+			DRM_DEBUG("assigning minor %d\n", minor);
+			dev = DRM(calloc)(1, sizeof(*dev), DRM_MEM_STUB);
+			if(!dev) 
+				return -ENOMEM;
+
+			*minors = (drm_minor_t){.dev = dev, .class = DRM_MINOR_PRIMARY};
+			dev->minor = minor;
+			if ((ret = DRM(fill_in_dev)(dev, pdev, ent))) {
+				printk (KERN_ERR "DRM: Fill_in_dev failed.\n");
+				goto err_g1;
+			}
+			if ((ret = DRM(proc_init)(dev, minor, DRM(global)->proc_root, &minors->dev_root))) {
+				printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n");
+				goto err_g1;
+			}
+			if (!DRM(fb_loaded)) {
+				pci_set_drvdata(pdev, dev);
+				pci_request_regions(pdev, DRIVER_NAME);
+				pci_enable_device(pdev);
+			}
+			dev_class = DRM(sysfs_device_add)(DRM(global)->drm_class, 
+					MKDEV(DRM_MAJOR, minor), DRM_PCI_DEV(pdev), "card%d", minor);
+			if (IS_ERR(dev_class)) {
+				printk (KERN_ERR "DRM: Error sysfs_device_add.\n");
+				ret = PTR_ERR(dev_class);
+				goto err_g2;
+			}
+
+			DRM_DEBUG("new primary minor assigned %d\n", minor);
+			return 0;
+		}
+	}
+	DRM_ERROR("out of minors\n");
+	return -ENOMEM;
+err_g2:
+	if (!DRM(fb_loaded)) {
+		pci_set_drvdata(pdev, NULL);
+		pci_release_regions(pdev);
+		pci_disable_device(pdev);
+	}
+	DRM(proc_cleanup)(minor, DRM(global)->proc_root, minors->dev_root);
+err_g1:
+	*minors = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_FREE};
+	DRM(free)(dev, sizeof(*dev), DRM_MEM_STUB);
+	return ret;
+}
+
+/**
+ * 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
+ */
+int DRM(get_secondary_minor)(drm_device_t *dev, drm_minor_t **sec_minor)
+{
+	drm_minor_t *minors = &DRM(global)->minors[0];
+	struct class_device *dev_class;
+	int ret;
+	int minor;
+
+	DRM_DEBUG("\n");
+
+	for (minor = 0; minor < DRM(global)->cards_limit; minor++, minors++) {
+		if (minors->class == DRM_MINOR_FREE) {
+
+			*minors = (drm_minor_t){.dev = dev, .class = DRM_MINOR_SECONDARY};
+			if ((ret = DRM(proc_init)(dev, minor, DRM(global)->proc_root, &minors->dev_root))) {
+				printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n");
+				goto err_g1;
+			}
+
+			dev_class = DRM(sysfs_device_add)(DRM(global)->drm_class, 
+					MKDEV(DRM_MAJOR, minor), DRM_PCI_DEV(dev->pdev), "card%d", minor);
+			if (IS_ERR(dev_class)) {
+				printk (KERN_ERR "DRM: Error sysfs_device_add.\n");
+				ret = PTR_ERR(dev_class);
+				goto err_g2;
+			}
+			*sec_minor = minors;
+
+			DRM_DEBUG("new secondary minor assigned %d\n", minor);
+			return 0;
+		}
+	}
+	DRM_ERROR("out of minors\n");
+	return -ENOMEM;
+err_g2:
+	DRM(proc_cleanup)(minor, DRM(global)->proc_root, minors->dev_root);
+err_g1:
+	*minors = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_FREE};
+	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_minor)(drm_device_t *dev)
+{
+	drm_minor_t *minors = &DRM(global)->minors[dev->minor];
+	int i;
+	
+	DRM_DEBUG("release primary minor %d\n", dev->minor);
+
+	DRM(proc_cleanup)(dev->minor, DRM(global)->proc_root, minors->dev_root);
+	DRM(sysfs_device_remove)(MKDEV(DRM_MAJOR, dev->minor));
+
+	*minors = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_FREE};
+	DRM(free)(dev, sizeof(*dev), DRM_MEM_STUB);
+
+	/* if any device pointers are non-NULL we are not the last module */
+	for (i = 0; i < DRM(global)->cards_limit; i++) {
+		if (DRM(global)->minors[i].class != DRM_MINOR_FREE) {
+			DRM_DEBUG("inter_module_put called\n");
+			inter_module_put("drm");
+			return 0;
+		}
+	}
+	DRM_DEBUG("unregistering inter_module \n");
+	inter_module_unregister("drm");
+	remove_proc_entry("dri", NULL);
+	DRM(sysfs_destroy)(DRM(global)->drm_class);
+
+	unregister_chrdev(DRM_MAJOR, "drm");
+
+	DRM(free)(DRM(global)->minors, sizeof(*DRM(global)->minors) *
+				DRM(global)->cards_limit, DRM_MEM_STUB);
+	DRM(free)(DRM(global), sizeof(*DRM(global)), DRM_MEM_STUB);
+	DRM(global) = NULL;
+
+	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_secondary_minor)(drm_minor_t *sec_minor)
+{
+	int minor = sec_minor - &DRM(global)->minors[0];
+
+	DRM_DEBUG("release secondary minor %d\n", minor);
+
+	DRM(proc_cleanup)(minor, DRM(global)->proc_root, sec_minor->dev_root);
+	DRM(sysfs_device_remove)(MKDEV(DRM_MAJOR, minor));
+
+	*sec_minor = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_FREE};
+
+	return 0;
+}
+
+/**
+ * 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(probe)(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	drm_global_t *global;
+	int ret = -ENOMEM;
+
+	DRM_DEBUG("\n");
+
+	/* use the inter_module_get to check - as if the same module
+		registers chrdev twice it succeeds */
+	global = (drm_global_t *)inter_module_get("drm");
+	if (global) {
+		DRM(global) = global;
+		global = NULL;
+	} else {
+		DRM_DEBUG("first probe\n");
+
+		global = DRM(calloc)(1, sizeof(*global), DRM_MEM_STUB);
+		if(!global) 
+			return -ENOMEM;
+
+		global->cards_limit = (cards_limit < DRM_MAX_MINOR + 1 ? cards_limit : DRM_MAX_MINOR + 1);
+		global->minors = DRM(calloc)(global->cards_limit, 
+					sizeof(*global->minors), DRM_MEM_STUB);
+		if(!global->minors) 
+			goto err_p1;
+
+		if (register_chrdev(DRM_MAJOR, "drm", &DRM(stub_fops)))
+			goto err_p1;
+	
+		global->drm_class = DRM(sysfs_create)(THIS_MODULE, "drm");
+		if (IS_ERR(global->drm_class)) {
+			printk (KERN_ERR "DRM: Error creating drm class.\n");
+			ret = PTR_ERR(global->drm_class);
+			goto err_p2;
+		}
+
+		global->proc_root = create_proc_entry("dri", S_IFDIR, NULL);
+		if (!global->proc_root) {
+			DRM_ERROR("Cannot create /proc/dri\n");
+			ret = -1;
+			goto err_p3;
+		}
+		DRM_DEBUG("calling inter_module_register\n");
+		inter_module_register("drm", THIS_MODULE, global);
+		
+		DRM(global) = global;
+	}
+	if ((ret = get_minor(pdev, ent))) {
+		if (global)
+			goto err_p3;
+		return ret;
+	}
+	return 0;
+err_p3:
+	DRM(sysfs_destroy)(global->drm_class);
+err_p2:
+	unregister_chrdev(DRM_MAJOR, "drm");
+	DRM(free)(global->minors, sizeof(*global->minors) * global->cards_limit, DRM_MEM_STUB);
+err_p1:	
+	DRM(free)(global, sizeof(*global), DRM_MEM_STUB);
+	DRM(global) = NULL;
+	return ret;
+}