drm/linux-core/drm_stub.c

331 lines
8.9 KiB
C

/**
* \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 "drmP.h"
#include "drm_core.h"
unsigned int cards_limit = 16; /* Enough for one machine */
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_minor_t *drm_minors;
struct drm_sysfs_class *drm_class;
struct proc_dir_entry *drm_proc_root;
static int fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
const struct pci_device_id *ent,
struct drm_driver_fn *driver_fn)
{
int retcode;
dev->count_lock = SPIN_LOCK_UNLOCKED;
init_timer(&dev->timer);
sema_init(&dev->struct_sem, 1);
sema_init(&dev->ctxlist_sem, 1);
dev->name = DRIVER_NAME;
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;
dev->maplist = drm_calloc(1, sizeof(*dev->maplist), DRM_MEM_MAPS);
if (dev->maplist == NULL)
return -ENOMEM;
INIT_LIST_HEAD(&dev->maplist->head);
/* the DRM has 6 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->fn_tbl = driver_fn;
if (dev->fn_tbl->preinit)
if ((retcode = dev->fn_tbl->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 */
/* drivers add secondary heads here if needed */
if ((retcode = dev->fn_tbl->postinit(dev, ent->driver_data)))
goto error_out_unreg;
return 0;
error_out_unreg:
drm_takedown(dev);
return retcode;
}
/**
* 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,
struct drm_driver_fn *driver_fn)
{
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 < 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 (!drm_fb_loaded) {
pci_set_drvdata(pdev, dev);
pci_request_regions(pdev, DRIVER_NAME);
pci_enable_device(pdev);
}
if ((ret = fill_in_dev(dev, pdev, ent, driver_fn))) {
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),
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:
drm_proc_cleanup(minor, drm_proc_root, minors->dev_root);
err_g1:
if (!drm_fb_loaded) {
pci_set_drvdata(pdev, NULL);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
*minors = (drm_minor_t) {
.dev = NULL,.class = DRM_MINOR_FREE};
drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
return ret;
}
EXPORT_SYMBOL(drm_probe);
/**
* 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_minors[0];
struct class_device *dev_class;
int ret;
int minor;
DRM_DEBUG("\n");
for (minor = 0; minor < 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_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),
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_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_minors[dev->minor];
DRM_DEBUG("release primary 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,.class = DRM_MINOR_FREE};
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_secondary_minor(drm_minor_t * sec_minor)
{
int minor = sec_minor - &drm_minors[0];
DRM_DEBUG("release secondary minor %d\n", minor);
drm_proc_cleanup(minor, drm_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;
}