/**
* \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( CORE_AUTHOR );
MODULE_DESCRIPTION( CORE_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_named(cards_limit, drm_cards_limit, int, 0444);
module_param_named(debug, drm_debug, int, 0666);
drm_head_t **drm_heads;
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(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 );
}
}
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_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;
if (!drm_heads[minor])
return -ENODEV;
if (!(dev = drm_heads[minor]->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 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_head(drm_device_t *dev, drm_head_t *head)
{
drm_head_t **heads = drm_heads;
int ret;
int minor;
DRM_DEBUG("\n");
for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
if (!*heads) {
*head = (drm_head_t) {
.dev = dev,
.device = MKDEV(DRM_MAJOR, minor),
.minor = minor,
};
if ((ret = drm_proc_init(dev, minor, drm_proc_root, &head->dev_root))) {
printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n");
goto err_g1;
}
head->dev_class = drm_sysfs_device_add(drm_class,
MKDEV(DRM_MAJOR,
minor),
&dev->pdev->dev,
"card%d", minor);
if (IS_ERR(head->dev_class)) {
printk(KERN_ERR "DRM: Error sysfs_device_add.\n");
ret = PTR_ERR(head->dev_class);
goto err_g2;
}
*heads = head;
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, head->dev_root);
err_g1:
*head = (drm_head_t) {.dev = 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)
{
drm_device_t *dev;
int ret;
DRM_DEBUG("\n");
dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
if (!dev)
return -ENOMEM;
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_get_head(dev, &dev->primary)))
goto err_g1;
/* postinit is a required function to display the signon banner */
/* drivers add secondary heads here if needed */
if ((ret = dev->driver->postinit(dev, ent->driver_data)))
goto err_g1;
return 0;
err_g1:
drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
return ret;
}
EXPORT_SYMBOL(drm_get_dev);
/**
* 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(drm_device_t * 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_head(drm_head_t *head)
{
int minor = head->minor;
DRM_DEBUG("release secondary minor %d\n", minor);
drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
drm_sysfs_device_remove(MKDEV(DRM_MAJOR, head->minor));
*head = (drm_head_t){.dev = NULL};
drm_heads[minor] = NULL;
return 0;
}
