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319 lines
8.2 KiB
319 lines
8.2 KiB
/**
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* \file drm_stub.h
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* Stub support
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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*/
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/*
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* Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
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*
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* Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include "drmP.h"
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#include "drm_core.h"
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unsigned int drm_cards_limit = 16; /* Enough for one machine */
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unsigned int drm_debug = 0; /* 1 to enable debug output */
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EXPORT_SYMBOL(drm_debug);
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MODULE_AUTHOR( CORE_AUTHOR );
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MODULE_DESCRIPTION( CORE_DESC );
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MODULE_LICENSE("GPL and additional rights");
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MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards");
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MODULE_PARM_DESC(debug, "Enable debug output");
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module_param_named(cards_limit, drm_cards_limit, int, 0444);
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module_param_named(debug, drm_debug, int, 0666);
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drm_head_t **drm_heads;
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struct drm_sysfs_class *drm_class;
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struct proc_dir_entry *drm_proc_root;
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static int drm_fill_in_dev(drm_device_t *dev, struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver *driver)
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{
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int retcode;
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spin_lock_init(&dev->count_lock);
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init_timer( &dev->timer );
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sema_init( &dev->struct_sem, 1 );
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sema_init( &dev->ctxlist_sem, 1 );
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dev->pdev = pdev;
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#ifdef __alpha__
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dev->hose = pdev->sysdata;
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dev->pci_domain = dev->hose->bus->number;
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#else
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dev->pci_domain = 0;
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#endif
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dev->pci_bus = pdev->bus->number;
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dev->pci_slot = PCI_SLOT(pdev->devfn);
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dev->pci_func = PCI_FUNC(pdev->devfn);
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dev->irq = pdev->irq;
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/* the DRM has 6 basic counters */
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dev->counters = 6;
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dev->types[0] = _DRM_STAT_LOCK;
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dev->types[1] = _DRM_STAT_OPENS;
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dev->types[2] = _DRM_STAT_CLOSES;
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dev->types[3] = _DRM_STAT_IOCTLS;
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dev->types[4] = _DRM_STAT_LOCKS;
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dev->types[5] = _DRM_STAT_UNLOCKS;
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dev->driver = driver;
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if (dev->driver->preinit)
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if ((retcode = dev->driver->preinit(dev, ent->driver_data)))
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goto error_out_unreg;
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if (drm_core_has_AGP(dev)) {
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dev->agp = drm_agp_init(dev);
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if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) {
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DRM_ERROR( "Cannot initialize the agpgart module.\n" );
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retcode = -EINVAL;
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goto error_out_unreg;
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}
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if (drm_core_has_MTRR(dev)) {
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if (dev->agp)
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dev->agp->agp_mtrr = mtrr_add( dev->agp->agp_info.aper_base,
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dev->agp->agp_info.aper_size*1024*1024,
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MTRR_TYPE_WRCOMB,
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1 );
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}
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}
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retcode = drm_ctxbitmap_init( dev );
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if( retcode ) {
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DRM_ERROR( "Cannot allocate memory for context bitmap.\n" );
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goto error_out_unreg;
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}
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return 0;
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error_out_unreg:
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drm_takedown(dev);
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return retcode;
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}
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/**
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* File \c open operation.
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*
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* \param inode device inode.
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* \param filp file pointer.
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*
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* Puts the dev->fops corresponding to the device minor number into
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* \p filp, call the \c open method, and restore the file operations.
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*/
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int drm_stub_open(struct inode *inode, struct file *filp)
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{
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drm_device_t *dev = NULL;
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int minor = iminor(inode);
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int err = -ENODEV;
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struct file_operations *old_fops;
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DRM_DEBUG("\n");
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if (!((minor >= 0) && (minor < drm_cards_limit)))
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return -ENODEV;
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if (!drm_heads[minor])
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return -ENODEV;
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if (!(dev = drm_heads[minor]->dev))
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return -ENODEV;
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old_fops = filp->f_op;
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filp->f_op = fops_get(&dev->driver->fops);
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if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) {
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fops_put(filp->f_op);
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filp->f_op = fops_get(old_fops);
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}
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fops_put(old_fops);
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return err;
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}
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/**
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* Register.
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*
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* \param pdev - PCI device structure
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* \param ent entry from the PCI ID table with device type flags
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* \return zero on success or a negative number on failure.
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*
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* Attempt to gets inter module "drm" information. If we are first
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* then register the character device and inter module information.
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* Try and register, if we fail to register, backout previous work.
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*/
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int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
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struct drm_driver *driver)
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{
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drm_device_t *dev;
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int ret;
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DRM_DEBUG("\n");
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dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
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if (!dev)
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return -ENOMEM;
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pci_enable_device(pdev);
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if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
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printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
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goto err_g1;
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}
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if ((ret = drm_get_head(dev, &dev->primary)))
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goto err_g1;
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/* postinit is a required function to display the signon banner */
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/* drivers add secondary heads here if needed */
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if ((ret = dev->driver->postinit(dev, ent->driver_data)))
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goto err_g1;
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return 0;
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err_g1:
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drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
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return ret;
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}
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EXPORT_SYMBOL(drm_get_dev);
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/**
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* Get a secondary minor number.
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*
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* \param dev device data structure
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* \param sec-minor structure to hold the assigned minor
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* \return negative number on failure.
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*
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* Search an empty entry and initialize it to the given parameters, and
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* create the proc init entry via proc_init(). This routines assigns
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* minor numbers to secondary heads of multi-headed cards
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*/
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int drm_get_head(drm_device_t *dev, drm_head_t *head)
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{
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drm_head_t **heads = drm_heads;
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int ret;
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int minor;
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DRM_DEBUG("\n");
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for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
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if (!*heads) {
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*head = (drm_head_t) {
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.dev = dev,
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.device = MKDEV(DRM_MAJOR, minor),
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.minor = minor,
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};
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if ((ret = drm_proc_init(dev, minor, drm_proc_root, &head->dev_root))) {
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printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n");
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goto err_g1;
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}
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head->dev_class = drm_sysfs_device_add(drm_class,
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MKDEV(DRM_MAJOR,
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minor),
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&dev->pdev->dev,
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"card%d", minor);
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if (IS_ERR(head->dev_class)) {
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printk(KERN_ERR "DRM: Error sysfs_device_add.\n");
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ret = PTR_ERR(head->dev_class);
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goto err_g2;
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}
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*heads = head;
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DRM_DEBUG("new minor assigned %d\n", minor);
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return 0;
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}
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}
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DRM_ERROR("out of minors\n");
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return -ENOMEM;
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err_g2:
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drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
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err_g1:
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*head = (drm_head_t) {.dev = NULL};
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return ret;
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}
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/**
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* Put a device minor number.
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*
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* \param dev device data structure
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* \return always zero
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*
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* Cleans up the proc resources. If it is the last minor then release the foreign
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* "drm" data, otherwise unregisters the "drm" data, frees the dev list and
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* unregisters the character device.
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*/
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int drm_put_dev(drm_device_t * dev)
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{
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DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
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if (dev->unique) {
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drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
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dev->unique = NULL;
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dev->unique_len = 0;
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}
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if (dev->devname) {
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drm_free(dev->devname, strlen(dev->devname) + 1,
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DRM_MEM_DRIVER);
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dev->devname = NULL;
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}
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drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
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return 0;
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}
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/**
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* Put a secondary minor number.
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*
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* \param sec_minor - structure to be released
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* \return always zero
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*
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* Cleans up the proc resources. Not legal for this to be the
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* last minor released.
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*
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*/
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int drm_put_head(drm_head_t *head)
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{
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int minor = head->minor;
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DRM_DEBUG("release secondary minor %d\n", minor);
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drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
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drm_sysfs_device_remove(MKDEV(DRM_MAJOR, head->minor));
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*head = (drm_head_t){.dev = NULL};
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drm_heads[minor] = NULL;
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return 0;
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}
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