patch-2.3.18 linux/drivers/char/drm/gamma_drv.c

• Lines: 526
• Date: Tue Sep 7 14:51:28 1999
• Orig file: v2.3.17/linux/drivers/char/drm/gamma_drv.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.17/linux/drivers/char/drm/gamma_drv.c linux/drivers/char/drm/gamma_drv.c
@@ -0,0 +1,525 @@
+/* gamma.c -- 3dlabs GMX 2000 driver -*- linux-c -*-
+ * Created: Mon Jan  4 08:58:31 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 22:48:11 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/generic/gamma_drv.c,v 1.17 1999/08/30 13:05:00 faith Exp $
+ * $XFree86$
+ *
+ */
+
+#define EXPORT_SYMTAB
+#include "drmP.h"
+#include "gamma_drv.h"
+EXPORT_SYMBOL(gamma_init);
+EXPORT_SYMBOL(gamma_cleanup);
+
+#define GAMMA_NAME	 "gamma"
+#define GAMMA_DESC	 "3dlabs GMX 2000"
+#define GAMMA_DATE	 "19990830"
+#define GAMMA_MAJOR	 0
+#define GAMMA_MINOR	 0
+#define GAMMA_PATCHLEVEL 5
+
+static drm_device_t	      gamma_device;
+
+static struct file_operations gamma_fops = {
+	open:	 gamma_open,
+	flush:	 drm_flush,
+	release: gamma_release,
+	ioctl:	 gamma_ioctl,
+	mmap:	 drm_mmap,
+	read:	 drm_read,
+	fasync:	 drm_fasync,
+};
+
+static struct miscdevice      gamma_misc = {
+	minor: MISC_DYNAMIC_MINOR,
+	name:  GAMMA_NAME,
+	fops:  &gamma_fops,
+};
+
+static drm_ioctl_desc_t	      gamma_ioctls[] = {
+	[DRM_IOCTL_NR(DRM_IOCTL_VERSION)]    = { gamma_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)]    = { gamma_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)]   = { drm_addbufs,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)]  = { drm_markbufs,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)]  = { drm_infobufs,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)]   = { drm_mapbufs,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)]  = { drm_freebufs,	  1, 0 },
+	
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]    = { drm_addctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]     = { drm_rmctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]    = { drm_modctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)]    = { drm_getctx,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { drm_switchctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)]    = { drm_newctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)]    = { drm_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_DMA)]	     = { gamma_dma,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_LOCK)]	     = { gamma_lock,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)]     = { gamma_unlock,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_FINISH)]     = { drm_finish,	  1, 0 },
+};
+#define GAMMA_IOCTL_COUNT DRM_ARRAY_SIZE(gamma_ioctls)
+
+#ifdef MODULE
+int			      init_module(void);
+void			      cleanup_module(void);
+static char		      *gamma = NULL;
+
+MODULE_AUTHOR("Precision Insight, Inc., Cedar Park, Texas.");
+MODULE_DESCRIPTION("3dlabs GMX 2000");
+MODULE_PARM(gamma, "s");
+
+/* init_module is called when insmod is used to load the module */
+
+int init_module(void)
+{
+	return gamma_init();
+}
+
+/* cleanup_module is called when rmmod is used to unload the module */
+
+void cleanup_module(void)
+{
+	gamma_cleanup();
+}
+#endif
+
+#ifndef MODULE
+/* gamma_setup 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.
+ *
+ * This is not currently supported, since it requires changes to
+ * linux/init/main.c. */
+ 
+
+void __init gamma_setup(char *str, int *ints)
+{
+	if (ints[0] != 0) {
+		DRM_ERROR("Illegal command line format, ignored\n");
+		return;
+	}
+	drm_parse_options(str);
+}
+#endif
+
+static int gamma_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 gamma_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) gamma_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 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 = %d\n", 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;
+			}
+			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;
+}
+
+/* gamma_init is called via init_module at module load time, or via
+ * linux/init/main.c (this is not currently supported). */
+
+int gamma_init(void)
+{
+	int		      retcode;
+	drm_device_t	      *dev = &gamma_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(gamma);
+#endif
+
+	if ((retcode = misc_register(&gamma_misc))) {
+		DRM_ERROR("Cannot register \"%s\"\n", GAMMA_NAME);
+		return retcode;
+	}
+	dev->device = MKDEV(MISC_MAJOR, gamma_misc.minor);
+	dev->name   = GAMMA_NAME;
+
+	drm_mem_init();
+	drm_proc_init(dev);
+
+	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
+		 GAMMA_NAME,
+		 GAMMA_MAJOR,
+		 GAMMA_MINOR,
+		 GAMMA_PATCHLEVEL,
+		 GAMMA_DATE,
+		 gamma_misc.minor);
+	
+	return 0;
+}
+
+/* gamma_cleanup is called via cleanup_module at module unload time. */
+
+void gamma_cleanup(void)
+{
+	drm_device_t	      *dev = &gamma_device;
+
+	DRM_DEBUG("\n");
+	
+	drm_proc_cleanup();
+	if (misc_deregister(&gamma_misc)) {
+		DRM_ERROR("Cannot unload module\n");
+	} else {
+		DRM_INFO("Module unloaded\n");
+	}
+	gamma_takedown(dev);
+}
+
+int gamma_version(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_version_t version;
+	int	      len;
+
+	copy_from_user_ret(&version,
+			   (drm_version_t *)arg,
+			   sizeof(version),
+			   -EFAULT);
+
+#define DRM_COPY(name,value)				     \
+	len = strlen(value);				     \
+	if (len > name##_len) len = name##_len;		     \
+	name##_len = strlen(value);			     \
+	if (len && name) {				     \
+		copy_to_user_ret(name, value, len, -EFAULT); \
+	}
+
+	version.version_major	   = GAMMA_MAJOR;
+	version.version_minor	   = GAMMA_MINOR;
+	version.version_patchlevel = GAMMA_PATCHLEVEL;
+
+	DRM_COPY(version.name, GAMMA_NAME);
+	DRM_COPY(version.date, GAMMA_DATE);
+	DRM_COPY(version.desc, GAMMA_DESC);
+
+	copy_to_user_ret((drm_version_t *)arg,
+			 &version,
+			 sizeof(version),
+			 -EFAULT);
+	return 0;
+}
+
+int gamma_open(struct inode *inode, struct file *filp)
+{
+	drm_device_t  *dev    = &gamma_device;
+	int	      retcode = 0;
+	
+	DRM_DEBUG("open_count = %d\n", dev->open_count);
+	if (!(retcode = drm_open_helper(inode, filp, dev))) {
+		MOD_INC_USE_COUNT;
+		atomic_inc(&dev->total_open);
+		spin_lock(&dev->count_lock);
+		if (!dev->open_count++) {
+			spin_unlock(&dev->count_lock);
+			return gamma_setup(dev);
+		}
+		spin_unlock(&dev->count_lock);
+	}
+	return retcode;
+}
+
+int gamma_release(struct inode *inode, struct file *filp)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+	int	      retcode = 0;
+
+	DRM_DEBUG("open_count = %d\n", dev->open_count);
+	if (!(retcode = drm_release(inode, filp))) {
+		MOD_DEC_USE_COUNT;
+		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 %d\n",
+					  atomic_read(&dev->ioctl_count),
+					  dev->blocked);
+				spin_unlock(&dev->count_lock);
+				return -EBUSY;
+			}
+			spin_unlock(&dev->count_lock);
+			return gamma_takedown(dev);
+		}
+		spin_unlock(&dev->count_lock);
+	}
+	return retcode;
+}
+
+/* drm_ioctl is called whenever a process performs an ioctl on /dev/drm. */
+
+int gamma_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 = %d\n",
+		  current->pid, cmd, nr, dev->device, priv->authenticated);
+
+	if (nr >= GAMMA_IOCTL_COUNT) {
+		retcode = -EINVAL;
+	} else {
+		ioctl	  = &gamma_ioctls[nr];
+		func	  = ioctl->func;
+
+		if (!func) {
+			DRM_DEBUG("no function\n");
+			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 gamma_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;
+
+	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	
+	if (lock.context == DRM_KERNEL_CONTEXT) {
+		DRM_ERROR("Process %d using kernel context %d\n",
+			  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->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
+	gamma_dma_schedule(dev, 1);
+	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
+	
+	return 0;
+}