drm_drv.h

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/**
 * \file drm_drv.h 
 * Generic driver template
 *
 * \author Rickard E. (Rik) Faith <[e-mail]>
 * \author Gareth Hughes <[e-mail]>
 *
 * To use this template, you must at least define the following (samples
 * given for the MGA driver):
 *
 * \code
 * #define DRIVER_AUTHOR	"VA Linux Systems, Inc."
 *
 * #define DRIVER_NAME		"mga"
 * #define DRIVER_DESC		"Matrox G200/G400"
 * #define DRIVER_DATE		"20001127"
 *
 * #define DRIVER_MAJOR		2
 * #define DRIVER_MINOR		0
 * #define DRIVER_PATCHLEVEL	2
 *
 * #define DRIVER_IOCTL_COUNT	DRM_ARRAY_SIZE( mga_ioctls )
 *
 * #define DRM(x)		mga_##x
 * \endcode
 */

/*
 * Created: Thu Nov 23 03:10:50 2000 by [e-mail]
 *
 * Copyright 1999, 2000 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
 * VA LINUX SYSTEMS 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.
 */

#ifndef DRIVER_IOCTLS
#define DRIVER_IOCTLS
#endif

#ifndef MODULE
/** Use an additional macro to avoid preprocessor troubles */
#define DRM_OPTIONS_FUNC DRM(options)
/**
 * Called by the kernel to parse command-line options passed via the
 * boot-loader (e.g., LILO).  It calls the insmod option routine,
 * parse_options().
 */
static int __init DRM(options)( char *str )
{
	DRM(parse_options)( str );
	return 1;
}

__setup( DRIVER_NAME "=", DRM_OPTIONS_FUNC );
#undef DRM_OPTIONS_FUNC
#endif

#define MAX_DEVICES 4
static drm_device_t	DRM(device)[MAX_DEVICES];
static int		DRM(numdevs) = 0;

struct file_operations	DRM(fops) = {
	.owner   = THIS_MODULE,
	.open	 = DRM(open),
	.flush	 = DRM(flush),
	.release = DRM(release),
	.ioctl	 = DRM(ioctl),
	.mmap	 = DRM(mmap),
	.fasync  = DRM(fasync),
	.poll	 = DRM(poll),
	.read	 = DRM(read),
};

/** Ioctl table */
drm_ioctl_desc_t		  DRM(ioctls)[] = {
	[DRM_IOCTL_NR(DRM_IOCTL_VERSION)]       = { DRM(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_by_busid), 0, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)]       = { DRM(getmap),      0, 0 },
	[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)]    = { DRM(getclient),   0, 0 },
	[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)]     = { DRM(getstats),    0, 0 },
	[DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)]   = { DRM(setversion),  0, 1 },

	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)]    = { DRM(setunique),   1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)]         = { DRM(noop),        1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]       = { DRM(noop),        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_RM_MAP)]        = { DRM(rmmap),       1, 0 },

	[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { DRM(setsareactx), 1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { DRM(getsareactx), 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_LOCK)]	        = { DRM(lock),        1, 0 },
	[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)]        = { DRM(unlock),      1, 0 },

	[DRM_IOCTL_NR(DRM_IOCTL_FINISH)]        = { DRM(noop),      1, 0 },

	[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 },
	/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */

	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]       = { DRM(control),     1, 1 },

#if __OS_HAS_AGP
	[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 },
#endif

	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)]      = { DRM(sg_alloc),    1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)]       = { DRM(sg_free),     1, 1 },

	[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)]   = { DRM(wait_vblank), 0, 0 },

	DRIVER_IOCTLS
};

#define DRIVER_IOCTL_COUNT	DRM_ARRAY_SIZE( DRM(ioctls) )

#ifdef MODULE
static char *drm_opts = NULL;
#endif

MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_PARM( drm_opts, "s" );
MODULE_LICENSE("GPL and additional rights");

static int DRM(setup)( drm_device_t *dev )
{
	int i;
	int ret;

	if (dev->fn_tbl.presetup)
	{
		ret=dev->fn_tbl.presetup(dev);
		if (ret!=0) 
			return ret;
	}

	atomic_set( &dev->ioctl_count, 0 );
	atomic_set( &dev->vma_count, 0 );
	dev->buf_use = 0;
	atomic_set( &dev->buf_alloc, 0 );

	if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
	{
		i = DRM(dma_setup)( dev );
		if ( i < 0 )
			return i;
	}

	for ( i = 0 ; i < DRM_ARRAY_SIZE(dev->counts) ; i++ )
		atomic_set( &dev->counts[i], 0 );

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

	dev->maplist = DRM(alloc)(sizeof(*dev->maplist),
				  DRM_MEM_MAPS);
	if(dev->maplist == NULL) return -ENOMEM;
	memset(dev->maplist, 0, sizeof(*dev->maplist));
	INIT_LIST_HEAD(&dev->maplist->head);

	dev->ctxlist = DRM(alloc)(sizeof(*dev->ctxlist),
				  DRM_MEM_CTXLIST);
	if(dev->ctxlist == NULL) return -ENOMEM;
	memset(dev->ctxlist, 0, sizeof(*dev->ctxlist));
	INIT_LIST_HEAD(&dev->ctxlist->head);

	dev->vmalist = NULL;
	dev->sigdata.lock = 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_enabled = 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_waitqueue_head( &dev->context_wait );
	dev->if_version = 0;

	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.
	 */
	if (dev->fn_tbl.postsetup)
		dev->fn_tbl.postsetup(dev);

	return 0;
}


/**
 * Take down the DRM device.
 *
 * \param dev DRM device structure.
 *
 * Frees every resource in \p dev.
 *
 * \sa drm_device and setup().
 */
static int DRM(takedown)( drm_device_t *dev )
{
	drm_magic_entry_t *pt, *next;
	drm_map_t *map;
	drm_map_list_t *r_list;
	struct list_head *list, *list_next;
	drm_vma_entry_t *vma, *vma_next;
	int i;

	DRM_DEBUG( "\n" );

	if (dev->fn_tbl.pretakedown)
	  dev->fn_tbl.pretakedown(dev);

	if ( dev->irq_enabled ) DRM(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 (drm_core_has_AGP(dev) && dev->agp) {
		drm_agp_mem_t *entry;
		drm_agp_mem_t *nexte;

				/* Remove AGP resources, but leave dev->agp
                                   intact until drv_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_do_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;
	}

	if( dev->maplist ) {
		list_for_each_safe( list, list_next, &dev->maplist->head ) {
			r_list = (drm_map_list_t *)list;

			if ( ( map = r_list->map ) ) {
				switch ( map->type ) {
				case _DRM_REGISTERS:
				case _DRM_FRAME_BUFFER:
					if (drm_core_has_MTRR(dev)) {
						if ( map->mtrr >= 0 ) {
							int retcode;
							retcode = mtrr_del( map->mtrr,
									    map->offset,
									    map->size );
							DRM_DEBUG( "mtrr_del=%d\n", retcode );
						}
					}
					DRM(ioremapfree)( map->handle, map->size, dev );
					break;
				case _DRM_SHM:
					vfree(map->handle);
					break;

				case _DRM_AGP:
					/* Do nothing here, because this is all
					 * handled in the AGP/GART driver.
					 */
					break;
				case _DRM_SCATTER_GATHER:
					/* Handle it */
					if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
						DRM(sg_cleanup)(dev->sg);
						dev->sg = NULL;
					}
					break;
				}
				DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
			}
			list_del( list );
			DRM(free)(r_list, sizeof(*r_list), DRM_MEM_MAPS);
 		}
		DRM(free)(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
		dev->maplist = NULL;
 	}

	if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist ) {
		for ( i = 0 ; i < dev->queue_count ; i++ ) {
			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;
	}
	dev->queue_count = 0;

	if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
		DRM(dma_takedown)( dev );

	if ( dev->lock.hw_lock ) {
		dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
		dev->lock.filp = NULL;
		wake_up_interruptible( &dev->lock.lock_queue );
	}
	up( &dev->struct_sem );

	return 0;
}

static void DRM(init_fn_table)(struct drm_device *dev)
{
	dev->fn_tbl.reclaim_buffers = DRM(core_reclaim_buffers);
	dev->fn_tbl.get_map_ofs = DRM(core_get_map_ofs);
	dev->fn_tbl.get_reg_ofs = DRM(core_get_reg_ofs);
}

#include "drm_pciids.h"

static struct pci_device_id DRM(pciidlist)[] = {
	DRM(PCI_IDS)
};

static int DRM(probe)(struct pci_dev *pdev)
{
	drm_device_t *dev;
	int retcode;
	int i;
	int is_compat = 0;

	DRM_DEBUG( "\n" );

	for (i = 0; DRM(pciidlist)[i].vendor != 0; i++) {
		if ((DRM(pciidlist)[i].vendor == pdev->vendor) &&
		    (DRM(pciidlist)[i].device == pdev->device)) {
			is_compat = 1;
		}
	}
	if (is_compat == 0)
		return -ENODEV;

	if (DRM(numdevs) >= MAX_DEVICES)
		return -ENODEV;

	if ((retcode=pci_enable_device(pdev)))
		return retcode;

	dev = &(DRM(device)[DRM(numdevs)]);

	memset( (void *)dev, 0, sizeof(*dev) );
	dev->count_lock = SPIN_LOCK_UNLOCKED;
	init_timer( &dev->timer );
	sema_init( &dev->struct_sem, 1 );
	sema_init( &dev->ctxlist_sem, 1 );

	if ((dev->minor = DRM(stub_register)(DRIVER_NAME, &DRM(fops),dev)) < 0)
		return -EPERM;
	dev->device = MKDEV(DRM_MAJOR, dev->minor );
	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_priv_size can be changed by a driver in driver_register_fns */
	dev->dev_priv_size = sizeof(u32);

	/* the DRM has 6 basic counters - drivers add theirs in register_fns */
	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;

	DRM(init_fn_table)(dev);

	DRM(driver_register_fns)(dev);

	if (dev->fn_tbl.preinit)
	  dev->fn_tbl.preinit(dev);

	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" );
			DRM(stub_unregister)(dev->minor);
			DRM(takedown)( dev );
			return -EINVAL;
		}
		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" );
		DRM(stub_unregister)(dev->minor);
		DRM(takedown)( dev );
		return retcode;
	}

	DRM(numdevs)++; /* no errors, mark it reserved */
	
	DRM_INFO( "Initialized %s %d.%d.%d %s on minor %d: %s\n",
		DRIVER_NAME,
		DRIVER_MAJOR,
		DRIVER_MINOR,
		DRIVER_PATCHLEVEL,
		DRIVER_DATE,
		dev->minor,
		pci_pretty_name(pdev));

	if (dev->fn_tbl.postinit)
	  dev->fn_tbl.postinit(dev);

	return 0;