drm/src/drm_stub.c

	drm_stub.c revision 1450
/*
 * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * Copyright (c) 2012, 2013 Intel Corporation.  All rights reserved.
 */

/**
 * \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"
#include "drm_core.h"
#include "drm_linux_list.h"

unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */

struct idr drm_minors_idr;

static int drm_minor_get_id(struct drm_device *dev, int type)
{
    int new_id;
    int ret;
    int base, limit;

    switch (type) {
    case DRM_MINOR_LEGACY:
        base = DRM_MINOR_ID_BASE_LEGACY;
        limit = DRM_MINOR_ID_LIMIT_LEGACY;
        break;
    case DRM_MINOR_CONTROL:
        base = DRM_MINOR_ID_BASE_CONTROL;
        limit = DRM_MINOR_ID_LIMIT_CONTROL;
        break;
    case DRM_MINOR_RENDER:
        base = DRM_MINOR_ID_BASE_RENDER;
        limit = DRM_MINOR_ID_LIMIT_RENDER;
        break;
    case DRM_MINOR_VGATEXT:
        base = DRM_MINOR_ID_BASE_VGATEXT;
        limit = DRM_MINOR_ID_LIMIT_VGATEXT;
        break;
    case DRM_MINOR_AGPMASTER:
        base = DRM_MINOR_ID_BASE_AGPMASTER;
        limit = DRM_MINOR_ID_LIMIT_AGPMASTER;
        break;
    default:
        return -EINVAL;
    }

    mutex_lock(&dev->struct_mutex);
    ret = idr_get_new_above(&drm_minors_idr, NULL,
                base, &new_id);
    mutex_unlock(&dev->struct_mutex);

    if (ret) {
        return ret;
    }

    if (new_id > limit) {
        (void) idr_remove(&drm_minors_idr, new_id);
        return -EINVAL;
    }
    return new_id;
}

struct drm_master *drm_master_create(struct drm_minor *minor)
{
    struct drm_master *master;
    int i;

    master = kzalloc(sizeof(*master), GFP_KERNEL);
    if (!master)
        return NULL;

    kref_init(&master->refcount);
    mutex_init(&master->lock.lock_mutex, NULL, MUTEX_DRIVER, (void *)minor->dev->pdev->intr_block);
    cv_init(&master->lock.lock_cv, NULL, CV_DRIVER, NULL);

    for (i = 0; i < DRM_HASH_SIZE; i++) {
        master->magiclist[i].head = NULL;
        master->magiclist[i].tail = NULL;
    }

    master->minor = minor;

    list_add_tail(&master->head, &minor->master_list, (caddr_t)master);

    return master;
}

struct drm_master *drm_master_get(struct drm_master *master)
{
    kref_get(&master->refcount);
    return master;
}

void drm_master_destroy(struct kref *kref)
{
    struct drm_master *master = container_of(kref, struct drm_master, refcount);
    struct drm_magic_entry *pt, *next;
    struct drm_device *dev = master->minor->dev;
    struct drm_map_list *r_list, *list_temp;
    int i;

    list_del(&master->head);

    if (dev->driver->master_destroy)
        dev->driver->master_destroy(dev, master);

    list_for_each_entry_safe(r_list, list_temp, struct drm_map_list, &dev->maplist, head) {
        if (r_list->master == master) {
            (void) drm_rmmap_locked(dev, r_list->map);
            r_list = NULL;
        }
    }

    if (master->unique) {
        kfree(master->unique, master->unique_size);
        master->unique = NULL;
        master->unique_len = 0;

    }

    for (i = 0; i < DRM_HASH_SIZE; i++) {
        for (pt = master->magiclist[i].head; pt; pt = next) {
            next = pt->next;
            drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
        }
        master->magiclist[i].head = master->magiclist[i].tail = NULL;
    }

    cv_destroy(&master->lock.lock_cv);
    mutex_destroy(&master->lock.lock_mutex);

    kfree(master, sizeof (struct drm_master));
}

void drm_master_put(struct drm_master **master)
{
    kref_put(&(*master)->refcount, drm_master_destroy);
    *master = NULL;
}

/* LINTED */
int drm_setmaster_ioctl(DRM_IOCTL_ARGS)
{
    int ret = 0;

    if (dev->driver->entervt)
        dev->driver->entervt(dev);

    if (file->is_master)
        return 0;

    if (file->minor->master && file->minor->master != file->master)
        return -EINVAL;

    if (!file->master)
        return -EINVAL;

    if (!file->minor->master &&
        file->minor->master != file->master) {
        mutex_lock(&dev->struct_mutex);
        file->minor->master = drm_master_get(file->master);
        file->is_master = 1;
        if (dev->driver->master_set) {
            ret = dev->driver->master_set(dev, file, false);
            if (unlikely(ret != 0)) {
                file->is_master = 0;
                drm_master_put(&file->minor->master);
            }
        }
        mutex_unlock(&dev->struct_mutex);
    }

    return 0;
}

/* LINTED */
int drm_dropmaster_ioctl(DRM_IOCTL_ARGS)
{
    if (!file->is_master)
        return -EINVAL;

    if (!file->minor->master)
        return -EINVAL;

    if (dev->driver->leavevt)
        dev->driver->leavevt(dev);

    mutex_lock(&dev->struct_mutex);
    if (dev->driver->master_drop)
        dev->driver->master_drop(dev, file, false);
    drm_master_put(&file->minor->master);
    file->is_master = 0;
    mutex_unlock(&dev->struct_mutex);
    return 0;
}

static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
               struct drm_driver *driver)
{
    int retcode;

    INIT_LIST_HEAD(&dev->filelist);
    INIT_LIST_HEAD(&dev->ctxlist);
    INIT_LIST_HEAD(&dev->maplist);
    INIT_LIST_HEAD(&dev->vblank_event_list);
    INIT_LIST_HEAD(&dev->gem_objects_list);

    mutex_init(&dev->count_lock, NULL, MUTEX_DRIVER, (void *)pdev->intr_block);
    mutex_init(&dev->event_lock, NULL, MUTEX_DRIVER, (void *)pdev->intr_block);
    mutex_init(&dev->struct_mutex, NULL, MUTEX_DRIVER, NULL);   //adaptive locks
    mutex_init(&dev->ctxlist_mutex, NULL, MUTEX_DRIVER, NULL);
    mutex_init(&dev->irq_lock, NULL, MUTEX_DRIVER, (void *)pdev->intr_block);
    mutex_init(&dev->track_lock, NULL, MUTEX_DRIVER, (void *)pdev->intr_block);
    mutex_init(&dev->page_fault_lock, NULL, MUTEX_DRIVER, NULL);

    dev->pdev = pdev;
    dev->pci_device = pdev->device;
    dev->pci_vendor = pdev->vendor;

    idr_init(&dev->map_idr);

    /* 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;

    retcode = drm_ctxbitmap_init(dev);
    if (retcode) {
        DRM_ERROR("Cannot allocate memory for context bitmap.\n");
        goto error_out_unreg;
    }

    if (driver->driver_features & DRIVER_GEM) {
        retcode = drm_gem_init(dev);
        if (retcode) {
            DRM_ERROR("Cannot initialize graphics execution "
                  "manager (GEM)\n");
            goto error_out_unreg;
        }
    }

    dev->drm_wq = create_workqueue(dev->devinfo, "drm");
    if (dev->drm_wq == NULL) {
        DRM_ERROR("Failed to create drm workqueue.\n");
        goto error_out_unreg;
    }

    return 0;

      error_out_unreg:
    (void)drm_lastclose(dev);
    return retcode;
}


/**
 * 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_minor(struct drm_device *dev, struct drm_minor **minor, int type)
{
    struct drm_minor *new_minor;
    int ret;
    int minor_id;

    DRM_DEBUG("\n");

    minor_id = drm_minor_get_id(dev, type);
    if (minor_id < 0)
        return minor_id;

    new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
    if (!new_minor) {
        ret = -ENOMEM;
        goto err_idr;
    }

    new_minor->type = type;
    new_minor->dev = dev;
    new_minor->index = minor_id;
    INIT_LIST_HEAD(&new_minor->master_list);

    (void) idr_replace(&drm_minors_idr, new_minor, minor_id);

    if (type == DRM_MINOR_LEGACY)
        (void) sprintf(new_minor->name, "drm%d", new_minor->index);
    else if (type == DRM_MINOR_CONTROL)
        (void) sprintf(new_minor->name, "controlD%d", new_minor->index);
    else if (type == DRM_MINOR_RENDER)
        (void) sprintf(new_minor->name, "renderD%d", new_minor->index);
    else if (type == DRM_MINOR_VGATEXT)
        (void) sprintf(new_minor->name, "gfx%d", new_minor->index - DRM_MINOR_ID_BASE_VGATEXT);
    else if (type == DRM_MINOR_AGPMASTER)
        (void) sprintf(new_minor->name, "agpmaster%d", new_minor->index - DRM_MINOR_ID_BASE_AGPMASTER);

    idr_init(&new_minor->clone_idr);

    ret = drm_sysfs_device_add(new_minor);
    if (ret)
        goto err_g2;
    *minor = new_minor;

    DRM_DEBUG("new minor assigned %d\n", minor_id);
    return 0;


err_g2:
err_mem:
    kfree(new_minor, sizeof (*new_minor));
err_idr:
    (void) idr_remove(&drm_minors_idr, minor_id);
    *minor = NULL;
    return ret;
}

/**
 * Register.
 *
 * \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 drm_device *dev, struct pci_dev *pdev,
        struct drm_driver *driver, unsigned long driver_data)
{
    int ret;

    DRM_DEBUG("\n");

    if ((ret = drm_fill_in_dev(dev, pdev, driver))) {
        DRM_ERROR("DRM: Fill_in_dev failed");
        goto err_g1;
    }

    if ((ret = drm_get_minor(dev, &dev->vgatext, DRM_MINOR_VGATEXT))) {
        goto err_g2;
    }

    if (dev->driver->agp_support_detect)
        dev->driver->agp_support_detect(dev, driver_data);

    if (drm_core_has_AGP(dev)) {
        if ((ret = drm_get_minor(dev, &dev->agpmaster, DRM_MINOR_AGPMASTER)))
            goto err_g1;
    }

    if (drm_core_check_feature(dev, DRIVER_MODESET)) {
        ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
        if (ret)
            goto err_g3;
    }

    if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
        goto err_g4;

    if (dev->driver->load) {
        ret = dev->driver->load(dev, driver_data);
        if (ret)
            goto err_g5;
    }

    if (drm_init_kstats(dev)) {
        DRM_ERROR("init kstats error");
        ret = EFAULT;
        goto err_g5;
    }

    cmn_err(CE_CONT, "!Initialized %s v%d.%d.%d Modified date %s",
         driver->name, driver->major, driver->minor, driver->patchlevel,
         driver->date);

    return 0;

err_g5:
    (void) drm_put_minor(&dev->primary);
err_g4:
    if (drm_core_check_feature(dev, DRIVER_MODESET))
        (void) drm_put_minor(&dev->control);
err_g3:
    (void) drm_put_minor(&dev->vgatext);
err_g2:
    if (drm_core_has_AGP(dev))
        (void) drm_put_minor(&dev->agpmaster);
err_g1:
    return ret;
}

/**
 * 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_minor(struct drm_minor **minor_p)
{
    struct drm_minor *minor = *minor_p;

    DRM_DEBUG("release secondary minor %d\n", minor->index);

    drm_sysfs_device_remove(minor);

    (void) idr_remove(&drm_minors_idr, minor->index);

    idr_destroy(&minor->clone_idr);

    kfree(minor, sizeof (*minor));
    *minor_p = NULL;
    return 0;
}

/**
 * Called via drm_exit() at module unload time or when pci device is
 * unplugged.
 *
 * Cleans up all DRM device, calling drm_lastclose().
 *
 * \sa drm_init
 */
void drm_put_dev(struct drm_device *dev)
{
    struct drm_driver *driver;
    struct drm_map_list *r_list, *list_temp;

    DRM_DEBUG("\n");

    if (!dev) {
        DRM_ERROR("cleanup called no dev\n");
        return;
    }
    driver = dev->driver;

    (void) drm_lastclose(dev);

    (void) destroy_workqueue(dev->drm_wq);

    if (dev->driver->unload)
        dev->driver->unload(dev);

    gfxp_mempool_destroy();

    if (drm_core_has_AGP(dev) && dev->agp) {
        drm_agp_cleanup(dev);
        kfree(dev->agp, sizeof(*dev->agp));
        dev->agp = NULL;
    }

    drm_vblank_cleanup(dev);

    list_for_each_entry_safe(r_list, list_temp, struct drm_map_list, &dev->maplist, head)
        (void) drm_rmmap(dev, r_list->map);
    idr_destroy(&dev->map_idr);

    drm_ctxbitmap_cleanup(dev);

    (void) drm_put_minor(&dev->vgatext);

    if (drm_core_has_AGP(dev))
        (void) drm_put_minor(&dev->agpmaster);

    if (drm_core_check_feature(dev, DRIVER_MODESET))
        (void) drm_put_minor(&dev->control);

    if (driver->driver_features & DRIVER_GEM)
        drm_gem_destroy(dev);

    (void) drm_put_minor(&dev->primary);

    mutex_destroy(&dev->irq_lock);
    mutex_destroy(&dev->ctxlist_mutex);
    mutex_destroy(&dev->struct_mutex);
    mutex_destroy(&dev->event_lock);
    mutex_destroy(&dev->count_lock);

    drm_fini_kstats(dev);
}