i810_drv.c
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- /* i810_drv.c -- I810 driver -*- linux-c -*-
- * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com
- *
- * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 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.
- *
- * Authors: Rickard E. (Rik) Faith <faith@valinux.com>
- * Jeff Hartmann <jhartmann@valinux.com>
- *
- */
- #include <linux/config.h>
- #include "drmP.h"
- #include "i810_drv.h"
- #define I810_NAME "i810"
- #define I810_DESC "Intel I810"
- #define I810_DATE "20000928"
- #define I810_MAJOR 1
- #define I810_MINOR 1
- #define I810_PATCHLEVEL 0
- static drm_device_t i810_device;
- drm_ctx_t i810_res_ctx;
- static struct file_operations i810_fops = {
- #if LINUX_VERSION_CODE >= 0x020400
- /* This started being used during 2.4.0-test */
- owner: THIS_MODULE,
- #endif
- open: i810_open,
- flush: drm_flush,
- release: i810_release,
- ioctl: i810_ioctl,
- mmap: drm_mmap,
- read: drm_read,
- fasync: drm_fasync,
- poll: drm_poll,
- };
- static struct miscdevice i810_misc = {
- minor: MISC_DYNAMIC_MINOR,
- name: I810_NAME,
- fops: &i810_fops,
- };
- static drm_ioctl_desc_t i810_ioctls[] = {
- [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { i810_version, 0, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_busid, 0, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_block, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_unblock, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { i810_control, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { i810_addbufs, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { i810_markbufs, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { i810_infobufs, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { i810_freebufs, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { i810_addctx, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { i810_rmctx, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { i810_modctx, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { i810_getctx, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { i810_switchctx, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { i810_newctx, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { i810_resctx, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { i810_lock, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { i810_unlock, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_finish, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { drm_agp_alloc, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { drm_agp_free, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { drm_agp_bind, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { drm_agp_unbind, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_INIT)] = { i810_dma_init, 1, 1 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_VERTEX)] = { i810_dma_vertex, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_CLEAR)] = { i810_clear_bufs, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_FLUSH)] = { i810_flush_ioctl,1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_GETAGE)] = { i810_getage, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_GETBUF)] = { i810_getbuf, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_SWAP)] = { i810_swap_bufs, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_COPY)] = { i810_copybuf, 1, 0 },
- [DRM_IOCTL_NR(DRM_IOCTL_I810_DOCOPY)] = { i810_docopy, 1, 0 },
- };
- #define I810_IOCTL_COUNT DRM_ARRAY_SIZE(i810_ioctls)
- #ifdef MODULE
- static char *i810 = NULL;
- #endif
- MODULE_AUTHOR("VA Linux Systems, Inc.");
- MODULE_DESCRIPTION("Intel I810");
- MODULE_LICENSE("GPL and additional rights");
- MODULE_PARM(i810, "s");
- #ifndef MODULE
- /* i810_options is called by the kernel to parse command-line options
- * passed via the boot-loader (e.g., LILO). It calls the insmod option
- * routine, drm_parse_drm.
- */
- static int __init i810_options(char *str)
- {
- drm_parse_options(str);
- return 1;
- }
- __setup("i810=", i810_options);
- #endif
- static int i810_setup(drm_device_t *dev)
- {
- int i;
- atomic_set(&dev->ioctl_count, 0);
- atomic_set(&dev->vma_count, 0);
- dev->buf_use = 0;
- atomic_set(&dev->buf_alloc, 0);
- drm_dma_setup(dev);
- atomic_set(&dev->total_open, 0);
- atomic_set(&dev->total_close, 0);
- atomic_set(&dev->total_ioctl, 0);
- atomic_set(&dev->total_irq, 0);
- atomic_set(&dev->total_ctx, 0);
- atomic_set(&dev->total_locks, 0);
- atomic_set(&dev->total_unlocks, 0);
- atomic_set(&dev->total_contends, 0);
- atomic_set(&dev->total_sleeps, 0);
- for (i = 0; i < DRM_HASH_SIZE; i++) {
- dev->magiclist[i].head = NULL;
- dev->magiclist[i].tail = NULL;
- }
- dev->maplist = NULL;
- dev->map_count = 0;
- dev->vmalist = NULL;
- dev->lock.hw_lock = NULL;
- init_waitqueue_head(&dev->lock.lock_queue);
- dev->queue_count = 0;
- dev->queue_reserved = 0;
- dev->queue_slots = 0;
- dev->queuelist = NULL;
- dev->irq = 0;
- dev->context_flag = 0;
- dev->interrupt_flag = 0;
- dev->dma_flag = 0;
- dev->last_context = 0;
- dev->last_switch = 0;
- dev->last_checked = 0;
- init_timer(&dev->timer);
- init_waitqueue_head(&dev->context_wait);
- #if DRM_DMA_HISTO
- memset(&dev->histo, 0, sizeof(dev->histo));
- #endif
- dev->ctx_start = 0;
- dev->lck_start = 0;
- dev->buf_rp = dev->buf;
- dev->buf_wp = dev->buf;
- dev->buf_end = dev->buf + DRM_BSZ;
- dev->buf_async = NULL;
- init_waitqueue_head(&dev->buf_readers);
- init_waitqueue_head(&dev->buf_writers);
- DRM_DEBUG("n");
- /* The kernel's context could be created here, but is now created
- in drm_dma_enqueue. This is more resource-efficient for
- hardware that does not do DMA, but may mean that
- drm_select_queue fails between the time the interrupt is
- initialized and the time the queues are initialized. */
- return 0;
- }
- static int i810_takedown(drm_device_t *dev)
- {
- int i;
- drm_magic_entry_t *pt, *next;
- drm_map_t *map;
- drm_vma_entry_t *vma, *vma_next;
- DRM_DEBUG("n");
- if (dev->irq) i810_irq_uninstall(dev);
- down(&dev->struct_sem);
- del_timer(&dev->timer);
- if (dev->devname) {
- drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
- dev->devname = NULL;
- }
- if (dev->unique) {
- drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
- dev->unique = NULL;
- dev->unique_len = 0;
- }
- /* Clear pid list */
- for (i = 0; i < DRM_HASH_SIZE; i++) {
- for (pt = dev->magiclist[i].head; pt; pt = next) {
- next = pt->next;
- drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
- }
- dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
- }
- /* Clear AGP information */
- if (dev->agp) {
- drm_agp_mem_t *entry;
- drm_agp_mem_t *nexte;
- /* Remove AGP resources, but leave dev->agp
- intact until r128_cleanup is called. */
- for (entry = dev->agp->memory; entry; entry = nexte) {
- nexte = entry->next;
- if (entry->bound) drm_unbind_agp(entry->memory);
- drm_free_agp(entry->memory, entry->pages);
- drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
- }
- dev->agp->memory = NULL;
- if (dev->agp->acquired) _drm_agp_release();
- dev->agp->acquired = 0;
- dev->agp->enabled = 0;
- }
- /* Clear vma list (only built for debugging) */
- if (dev->vmalist) {
- for (vma = dev->vmalist; vma; vma = vma_next) {
- vma_next = vma->next;
- drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
- }
- dev->vmalist = NULL;
- }
- /* Clear map area and mtrr information */
- if (dev->maplist) {
- for (i = 0; i < dev->map_count; i++) {
- map = dev->maplist[i];
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
- #ifdef CONFIG_MTRR
- if (map->mtrr >= 0) {
- int retcode;
- retcode = mtrr_del(map->mtrr,
- map->offset,
- map->size);
- DRM_DEBUG("mtrr_del = %dn", retcode);
- }
- #endif
- drm_ioremapfree(map->handle, map->size);
- break;
- case _DRM_SHM:
- drm_free_pages((unsigned long)map->handle,
- drm_order(map->size)
- - PAGE_SHIFT,
- DRM_MEM_SAREA);
- break;
- case _DRM_AGP:
- break;
- }
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- }
- drm_free(dev->maplist,
- dev->map_count * sizeof(*dev->maplist),
- DRM_MEM_MAPS);
- dev->maplist = NULL;
- dev->map_count = 0;
- }
- if (dev->queuelist) {
- for (i = 0; i < dev->queue_count; i++) {
- drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
- if (dev->queuelist[i]) {
- drm_free(dev->queuelist[i],
- sizeof(*dev->queuelist[0]),
- DRM_MEM_QUEUES);
- dev->queuelist[i] = NULL;
- }
- }
- drm_free(dev->queuelist,
- dev->queue_slots * sizeof(*dev->queuelist),
- DRM_MEM_QUEUES);
- dev->queuelist = NULL;
- }
- drm_dma_takedown(dev);
- dev->queue_count = 0;
- if (dev->lock.hw_lock) {
- dev->lock.hw_lock = NULL; /* SHM removed */
- dev->lock.pid = 0;
- wake_up_interruptible(&dev->lock.lock_queue);
- }
- up(&dev->struct_sem);
- return 0;
- }
- /* i810_init is called via init_module at module load time, or via
- * linux/init/main.c (this is not currently supported). */
- static int __init i810_init(void)
- {
- int retcode;
- drm_device_t *dev = &i810_device;
- DRM_DEBUG("n");
- memset((void *)dev, 0, sizeof(*dev));
- dev->count_lock = SPIN_LOCK_UNLOCKED;
- sema_init(&dev->struct_sem, 1);
- #ifdef MODULE
- drm_parse_options(i810);
- #endif
- DRM_DEBUG("doing misc_registern");
- if ((retcode = misc_register(&i810_misc))) {
- DRM_ERROR("Cannot register "%s"n", I810_NAME);
- return retcode;
- }
- dev->device = MKDEV(MISC_MAJOR, i810_misc.minor);
- dev->name = I810_NAME;
- DRM_DEBUG("doing mem initn");
- drm_mem_init();
- DRM_DEBUG("doing proc initn");
- drm_proc_init(dev);
- DRM_DEBUG("doing agp initn");
- dev->agp = drm_agp_init();
- if(dev->agp == NULL) {
- DRM_INFO("The i810 drm module requires the agpgart module"
- " to function correctlynPlease load the agpgart"
- " module before you load the i810 modulen");
- drm_proc_cleanup();
- misc_deregister(&i810_misc);
- i810_takedown(dev);
- return -ENOMEM;
- }
- DRM_DEBUG("doing ctxbitmap initn");
- if((retcode = drm_ctxbitmap_init(dev))) {
- DRM_ERROR("Cannot allocate memory for context bitmap.n");
- drm_proc_cleanup();
- misc_deregister(&i810_misc);
- i810_takedown(dev);
- return retcode;
- }
- DRM_INFO("Initialized %s %d.%d.%d %s on minor %dn",
- I810_NAME,
- I810_MAJOR,
- I810_MINOR,
- I810_PATCHLEVEL,
- I810_DATE,
- i810_misc.minor);
- return 0;
- }
- /* i810_cleanup is called via cleanup_module at module unload time. */
- static void __exit i810_cleanup(void)
- {
- drm_device_t *dev = &i810_device;
- DRM_DEBUG("n");
- drm_proc_cleanup();
- if (misc_deregister(&i810_misc)) {
- DRM_ERROR("Cannot unload modulen");
- } else {
- DRM_INFO("Module unloadedn");
- }
- drm_ctxbitmap_cleanup(dev);
- i810_takedown(dev);
- if (dev->agp) {
- drm_agp_uninit();
- drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
- dev->agp = NULL;
- }
- }
- module_init(i810_init);
- module_exit(i810_cleanup);
- int i810_version(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
- {
- drm_version_t version;
- int len;
- if (copy_from_user(&version,
- (drm_version_t *)arg,
- sizeof(version)))
- return -EFAULT;
- #define DRM_COPY(name,value)
- len = strlen(value);
- if (len > name##_len) len = name##_len;
- name##_len = strlen(value);
- if (len && name) {
- if (copy_to_user(name, value, len))
- return -EFAULT;
- }
- version.version_major = I810_MAJOR;
- version.version_minor = I810_MINOR;
- version.version_patchlevel = I810_PATCHLEVEL;
- DRM_COPY(version.name, I810_NAME);
- DRM_COPY(version.date, I810_DATE);
- DRM_COPY(version.desc, I810_DESC);
- if (copy_to_user((drm_version_t *)arg,
- &version,
- sizeof(version)))
- return -EFAULT;
- return 0;
- }
- int i810_open(struct inode *inode, struct file *filp)
- {
- drm_device_t *dev = &i810_device;
- int retcode = 0;
- DRM_DEBUG("open_count = %dn", dev->open_count);
- if (!(retcode = drm_open_helper(inode, filp, dev))) {
- #if LINUX_VERSION_CODE < 0x020333
- MOD_INC_USE_COUNT; /* Needed before Linux 2.3.51 */
- #endif
- atomic_inc(&dev->total_open);
- spin_lock(&dev->count_lock);
- if (!dev->open_count++) {
- spin_unlock(&dev->count_lock);
- return i810_setup(dev);
- }
- spin_unlock(&dev->count_lock);
- }
- return retcode;
- }
- int i810_release(struct inode *inode, struct file *filp)
- {
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev;
- int retcode = 0;
- lock_kernel();
- dev = priv->dev;
- DRM_DEBUG("pid = %d, device = 0x%x, open_count = %dn",
- current->pid, dev->device, dev->open_count);
- if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
- && dev->lock.pid == current->pid) {
- i810_reclaim_buffers(dev, priv->pid);
- DRM_ERROR("Process %d dead, freeing lock for context %dn",
- current->pid,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
- drm_lock_free(dev,
- &dev->lock.hw_lock->lock,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
- /* FIXME: may require heavy-handed reset of
- hardware at this point, possibly
- processed via a callback to the X
- server. */
- } else if (dev->lock.hw_lock) {
- /* The lock is required to reclaim buffers */
- DECLARE_WAITQUEUE(entry, current);
- add_wait_queue(&dev->lock.lock_queue, &entry);
- for (;;) {
- current->state = TASK_INTERRUPTIBLE;
- if (!dev->lock.hw_lock) {
- /* Device has been unregistered */
- retcode = -EINTR;
- break;
- }
- if (drm_lock_take(&dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT)) {
- dev->lock.pid = priv->pid;
- dev->lock.lock_time = jiffies;
- atomic_inc(&dev->total_locks);
- break; /* Got lock */
- }
- /* Contention */
- atomic_inc(&dev->total_sleeps);
- schedule();
- if (signal_pending(current)) {
- retcode = -ERESTARTSYS;
- break;
- }
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&dev->lock.lock_queue, &entry);
- if(!retcode) {
- i810_reclaim_buffers(dev, priv->pid);
- drm_lock_free(dev, &dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT);
- }
- }
- drm_fasync(-1, filp, 0);
- down(&dev->struct_sem);
- if (priv->prev) priv->prev->next = priv->next;
- else dev->file_first = priv->next;
- if (priv->next) priv->next->prev = priv->prev;
- else dev->file_last = priv->prev;
- up(&dev->struct_sem);
- drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
- #if LINUX_VERSION_CODE < 0x020333
- MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
- #endif
- atomic_inc(&dev->total_close);
- spin_lock(&dev->count_lock);
- if (!--dev->open_count) {
- if (atomic_read(&dev->ioctl_count) || dev->blocked) {
- DRM_ERROR("Device busy: %d %dn",
- atomic_read(&dev->ioctl_count),
- dev->blocked);
- spin_unlock(&dev->count_lock);
- unlock_kernel();
- return -EBUSY;
- }
- spin_unlock(&dev->count_lock);
- unlock_kernel();
- return i810_takedown(dev);
- }
- spin_unlock(&dev->count_lock);
- unlock_kernel();
- return retcode;
- }
- /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm. */
- int i810_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
- {
- int nr = DRM_IOCTL_NR(cmd);
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- int retcode = 0;
- drm_ioctl_desc_t *ioctl;
- drm_ioctl_t *func;
- atomic_inc(&dev->ioctl_count);
- atomic_inc(&dev->total_ioctl);
- ++priv->ioctl_count;
- DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %dn",
- current->pid, cmd, nr, dev->device, priv->authenticated);
- if (nr >= I810_IOCTL_COUNT) {
- retcode = -EINVAL;
- } else {
- ioctl = &i810_ioctls[nr];
- func = ioctl->func;
- if (!func) {
- DRM_DEBUG("no functionn");
- retcode = -EINVAL;
- } else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN))
- || (ioctl->auth_needed && !priv->authenticated)) {
- retcode = -EACCES;
- } else {
- retcode = (func)(inode, filp, cmd, arg);
- }
- }
- atomic_dec(&dev->ioctl_count);
- return retcode;
- }
- int i810_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
- {
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- drm_lock_t lock;
- if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
- return -EFAULT;
- if (lock.context == DRM_KERNEL_CONTEXT) {
- DRM_ERROR("Process %d using kernel context %dn",
- current->pid, lock.context);
- return -EINVAL;
- }
- DRM_DEBUG("%d frees lock (%d holds)n",
- lock.context,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
- atomic_inc(&dev->total_unlocks);
- if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
- atomic_inc(&dev->total_contends);
- drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
- if (!dev->context_flag) {
- if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT)) {
- DRM_ERROR("n");
- }
- }
- #if DRM_DMA_HISTOGRAM
- atomic_inc(&dev->histo.lhld[drm_histogram_slot(get_cycles()
- - dev->lck_start)]);
- #endif
- unblock_all_signals();
- return 0;
- }