--- /dev/null
+/**
+ * \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_cards_limit = 16; /* Enough for one machine */
+unsigned int drm_debug = 0; /* 1 to enable debug output */
+EXPORT_SYMBOL(drm_debug);
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL and additional rights");
+MODULE_PARM_DESC(drm_cards_limit, "Maximum number of graphics cards");
+MODULE_PARM_DESC(drm_debug, "Enable debug output");
+
+module_param_named(cards_limit, drm_cards_limit, int, 0444);
+module_param_named(debug, drm_debug, int, 0666);
+
+drm_minor_t *drm_minors;
+struct drm_sysfs_class *drm_class;
+struct proc_dir_entry *drm_proc_root;
+
+static int drm_fill_in_dev(drm_device_t *dev, struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver *driver)
+{
+ int retcode;
+
+ spin_lock_init(&dev->count_lock);
+ init_timer( &dev->timer );
+ sema_init( &dev->struct_sem, 1 );
+ sema_init( &dev->ctxlist_sem, 1 );
+
+ dev->pdev = pdev;
+
+#ifdef __alpha__
+ dev->hose = pdev->sysdata;
+ dev->pci_domain = dev->hose->bus->number;
+#else
+ dev->pci_domain = 0;
+#endif
+ dev->pci_bus = pdev->bus->number;
+ dev->pci_slot = PCI_SLOT(pdev->devfn);
+ dev->pci_func = PCI_FUNC(pdev->devfn);
+ dev->irq = pdev->irq;
+
+ /* 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 (dev->driver->preinit)
+ if ((retcode = dev->driver->preinit(dev, ent->driver_data)))
+ goto error_out_unreg;
+
+ if (drm_core_has_AGP(dev)) {
+ dev->agp = drm_agp_init();
+ 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 );
+ }
+ }
+
+ retcode = drm_ctxbitmap_init( dev );
+ if( retcode ) {
+ DRM_ERROR( "Cannot allocate memory for context bitmap.\n" );
+ goto error_out_unreg;
+ }
+
+ dev->device = MKDEV(DRM_MAJOR, dev->minor );
+
+ /* postinit is a required function to display the signon banner */
+ if ((retcode = dev->driver->postinit(dev, ent->driver_data)))
+ goto error_out_unreg;
+
+ return 0;
+
+error_out_unreg:
+ drm_takedown(dev);
+ return retcode;
+}
+
+/**
+ * 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.
+ */
+int drm_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_cards_limit)))
+ return -ENODEV;
+
+ dev = drm_minors[minor].dev;
+ if (!dev)
+ return -ENODEV;
+
+ old_fops = filp->f_op;
+ filp->f_op = fops_get(&dev->driver->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;
+}
+
+/**
+ * Get a device minor number.
+ *
+ * \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, struct drm_driver *driver)
+{
+ struct class_device *dev_class;
+ drm_device_t *dev;
+ int ret;
+ int minor;
+ drm_minor_t *minors = &drm_minors[0];
+
+ DRM_DEBUG("\n");
+
+ for (minor = 0; minor < drm_cards_limit; minor++, minors++) {
+ if (minors->type == 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, .type=DRM_MINOR_PRIMARY};
+ dev->minor = minor;
+
+ pci_enable_device(pdev);
+
+ if ((ret=drm_fill_in_dev(dev, pdev, ent, driver))) {
+ printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
+ goto err_g1;
+ }
+ if ((ret = drm_proc_init(dev, minor, drm_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_class,
+ MKDEV(DRM_MAJOR,
+ minor),
+ &pdev->dev,
+ "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 minor assigned %d\n", minor);
+ return 0;
+ }
+ }
+ DRM_ERROR("out of minors\n");
+ return -ENOMEM;
+err_g2:
+ drm_proc_cleanup(minor, drm_proc_root, minors->dev_root);
+err_g1:
+ *minors = (drm_minor_t){.dev = NULL, .type = DRM_MINOR_FREE};
+ drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
+ return ret;
+}
+EXPORT_SYMBOL(drm_probe);
+
+
+/**
+ * Put a device minor number.
+ *
+ * \param minor minor number.
+ * \return always zero.
+ *
+ * Cleans up the proc resources. If a minor is zero then release the foreign
+ * "drm" data, otherwise unregisters the "drm" data, frees the stub list and
+ * unregisters the character device.
+ */
+int drm_put_minor(drm_device_t *dev)
+{
+ drm_minor_t *minors = &drm_minors[dev->minor];
+
+ DRM_DEBUG("release minor %d\n", dev->minor);
+
+ drm_proc_cleanup(dev->minor, drm_proc_root, minors->dev_root);
+ drm_sysfs_device_remove(MKDEV(DRM_MAJOR, dev->minor));
+
+ *minors = (drm_minor_t){.dev = NULL, .type = DRM_MINOR_FREE};
+ drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
+
+ return 0;
+}
+
git://git.onelab.eu / linux-2.6.git / blobdiff