From 2950f9e6823d43abae151966ae808d1a63e6659c Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Fri, 17 Oct 2003 05:13:48 +0000 Subject: - Move IRQ functions from drm_dma.h to new drm_irq.h and disentangle them from __HAVE_DMA. This will be useful for adding vblank sync support to sis and tdfx. Rename dma_service to irq_handler, which is more accurately what it is. - Fix the #if _HAVE_DMA_IRQ in radeon, r128, mga, i810, i830, gamma to have the right number of underscores. This may have been a problem in the case that the server died without doing its DRM_IOCTL_CONTROL to uninit. --- linux-core/drm_dma.c | 310 +-------------------------------------------------- 1 file changed, 5 insertions(+), 305 deletions(-) (limited to 'linux-core/drm_dma.c') diff --git a/linux-core/drm_dma.c b/linux-core/drm_dma.c index aef84d4e..f36cd1c1 100644 --- a/linux-core/drm_dma.c +++ b/linux-core/drm_dma.c @@ -36,7 +36,6 @@ #define __NO_VERSION__ #include "drmP.h" -#include /* For task queue support */ #ifndef __HAVE_DMA_WAITQUEUE #define __HAVE_DMA_WAITQUEUE 0 @@ -44,15 +43,6 @@ #ifndef __HAVE_DMA_RECLAIM #define __HAVE_DMA_RECLAIM 0 #endif -#ifndef __HAVE_SHARED_IRQ -#define __HAVE_SHARED_IRQ 0 -#endif - -#if __HAVE_SHARED_IRQ -#define DRM_IRQ_TYPE SA_SHIRQ -#else -#define DRM_IRQ_TYPE 0 -#endif #if __HAVE_DMA @@ -215,300 +205,11 @@ void DRM(reclaim_buffers)( struct file *filp ) } #endif - - - -#if __HAVE_DMA_IRQ - -/** - * Install IRQ handler. - * - * \param dev DRM device. - * \param irq IRQ number. - * - * Initializes the IRQ related data, and setups drm_device::vbl_queue. Installs the handler, calling the driver - * \c DRM(driver_irq_preinstall)() and \c DRM(driver_irq_postinstall)() functions - * before and after the installation. - */ -int DRM(irq_install)( drm_device_t *dev, int irq ) -{ - int ret; - - if ( !irq ) - return -EINVAL; - - down( &dev->struct_sem ); - - /* Driver must have been initialized */ - if ( !dev->dev_private ) { - up( &dev->struct_sem ); - return -EINVAL; - } - - if ( dev->irq ) { - up( &dev->struct_sem ); - return -EBUSY; - } - dev->irq = irq; - up( &dev->struct_sem ); - - DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, irq ); - - dev->context_flag = 0; - dev->interrupt_flag = 0; - dev->dma_flag = 0; - - dev->dma->next_buffer = NULL; - dev->dma->next_queue = NULL; - dev->dma->this_buffer = NULL; - -#if __HAVE_DMA_IRQ_BH -#if !HAS_WORKQUEUE - INIT_LIST_HEAD( &dev->tq.list ); - dev->tq.sync = 0; - dev->tq.routine = DRM(dma_immediate_bh); - dev->tq.data = dev; -#else - INIT_WORK(&dev->work, DRM(dma_immediate_bh), dev); -#endif -#endif - -#if __HAVE_VBL_IRQ - init_waitqueue_head(&dev->vbl_queue); - - spin_lock_init( &dev->vbl_lock ); - - INIT_LIST_HEAD( &dev->vbl_sigs.head ); - - dev->vbl_pending = 0; -#endif - - /* Before installing handler */ - DRM(driver_irq_preinstall)(dev); - - /* Install handler */ - ret = request_irq( dev->irq, DRM(dma_service), - DRM_IRQ_TYPE, dev->devname, dev ); - if ( ret < 0 ) { - down( &dev->struct_sem ); - dev->irq = 0; - up( &dev->struct_sem ); - return ret; - } - - /* After installing handler */ - DRM(driver_irq_postinstall)(dev); - - return 0; -} - -/** - * Uninstall the IRQ handler. - * - * \param dev DRM device. - * - * Calls the driver's \c DRM(driver_irq_uninstall)() function, and stops the irq. - */ -int DRM(irq_uninstall)( drm_device_t *dev ) -{ - int irq; - - down( &dev->struct_sem ); - irq = dev->irq; - dev->irq = 0; - up( &dev->struct_sem ); - - if ( !irq ) - return -EINVAL; - - DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, irq ); - - DRM(driver_irq_uninstall)( dev ); - - free_irq( irq, dev ); - - return 0; -} - -/** - * IRQ control ioctl. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg user argument, pointing to a drm_control structure. - * \return zero on success or a negative number on failure. - * - * Calls irq_install() or irq_uninstall() according to \p arg. +#if !__HAVE_IRQ +/* This stub DRM_IOCTL_CONTROL handler is for the drivers that used to require + * IRQs for DMA but no longer do. It maintains compatibility with the X Servers + * that try to use the control ioctl by simply returning success. */ -int DRM(control)( 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_control_t ctl; - - if ( copy_from_user( &ctl, (drm_control_t *)arg, sizeof(ctl) ) ) - return -EFAULT; - - switch ( ctl.func ) { - case DRM_INST_HANDLER: - return DRM(irq_install)( dev, ctl.irq ); - case DRM_UNINST_HANDLER: - return DRM(irq_uninstall)( dev ); - default: - return -EINVAL; - } -} - -#if __HAVE_VBL_IRQ - -/** - * Wait for VBLANK. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param data user argument, pointing to a drm_wait_vblank structure. - * \return zero on success or a negative number on failure. - * - * Verifies the IRQ is installed. - * - * If a signal is requested checks if this task has already scheduled the same signal - * for the same vblank sequence number - nothing to be done in - * that case. If the number of tasks waiting for the interrupt exceeds 100 the - * function fails. Otherwise adds a new entry to drm_device::vbl_sigs for this - * task. - * - * If a signal is not requested, then calls vblank_wait(). - */ -int DRM(wait_vblank)( DRM_IOCTL_ARGS ) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->dev; - drm_wait_vblank_t vblwait; - struct timeval now; - int ret = 0; - unsigned int flags; - - if (!dev->irq) - return -EINVAL; - - DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data, - sizeof(vblwait) ); - - switch ( vblwait.request.type & ~_DRM_VBLANK_FLAGS_MASK ) { - case _DRM_VBLANK_RELATIVE: - vblwait.request.sequence += atomic_read( &dev->vbl_received ); - vblwait.request.type &= ~_DRM_VBLANK_RELATIVE; - case _DRM_VBLANK_ABSOLUTE: - break; - default: - return -EINVAL; - } - - flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK; - - if ( flags & _DRM_VBLANK_SIGNAL ) { - unsigned long irqflags; - drm_vbl_sig_t *vbl_sig; - - vblwait.reply.sequence = atomic_read( &dev->vbl_received ); - - spin_lock_irqsave( &dev->vbl_lock, irqflags ); - - /* Check if this task has already scheduled the same signal - * for the same vblank sequence number; nothing to be done in - * that case - */ - list_for_each_entry( vbl_sig, &dev->vbl_sigs.head, head ) { - if (vbl_sig->sequence == vblwait.request.sequence - && vbl_sig->info.si_signo == vblwait.request.signal - && vbl_sig->task == current) - { - spin_unlock_irqrestore( &dev->vbl_lock, irqflags ); - goto done; - } - } - - if ( dev->vbl_pending >= 100 ) { - spin_unlock_irqrestore( &dev->vbl_lock, irqflags ); - return -EBUSY; - } - - dev->vbl_pending++; - - spin_unlock_irqrestore( &dev->vbl_lock, irqflags ); - - if ( !( vbl_sig = DRM_MALLOC( sizeof( drm_vbl_sig_t ) ) ) ) { - return -ENOMEM; - } - - memset( (void *)vbl_sig, 0, sizeof(*vbl_sig) ); - - vbl_sig->sequence = vblwait.request.sequence; - vbl_sig->info.si_signo = vblwait.request.signal; - vbl_sig->task = current; - - spin_lock_irqsave( &dev->vbl_lock, irqflags ); - - list_add_tail( (struct list_head *) vbl_sig, &dev->vbl_sigs.head ); - - spin_unlock_irqrestore( &dev->vbl_lock, irqflags ); - } else { - ret = DRM(vblank_wait)( dev, &vblwait.request.sequence ); - - do_gettimeofday( &now ); - vblwait.reply.tval_sec = now.tv_sec; - vblwait.reply.tval_usec = now.tv_usec; - } - -done: - DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait, - sizeof(vblwait) ); - - return ret; -} - -/** - * Send the VBLANK signals. - * - * \param dev DRM device. - * - * Sends a signal for each task in drm_device::vbl_sigs and empties the list. - * - * If a signal is not requested, then calls vblank_wait(). - */ -void DRM(vbl_send_signals)( drm_device_t *dev ) -{ - struct list_head *list, *tmp; - drm_vbl_sig_t *vbl_sig; - unsigned int vbl_seq = atomic_read( &dev->vbl_received ); - unsigned long flags; - - spin_lock_irqsave( &dev->vbl_lock, flags ); - - list_for_each_safe( list, tmp, &dev->vbl_sigs.head ) { - vbl_sig = list_entry( list, drm_vbl_sig_t, head ); - if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) { - vbl_sig->info.si_code = vbl_seq; - send_sig_info( vbl_sig->info.si_signo, &vbl_sig->info, vbl_sig->task ); - - list_del( list ); - - DRM_FREE( vbl_sig, sizeof(*vbl_sig) ); - - dev->vbl_pending--; - } - } - - spin_unlock_irqrestore( &dev->vbl_lock, flags ); -} - -#endif /* __HAVE_VBL_IRQ */ - -#else - int DRM(control)( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { @@ -525,7 +226,6 @@ int DRM(control)( struct inode *inode, struct file *filp, return -EINVAL; } } - -#endif /* __HAVE_DMA_IRQ */ +#endif #endif /* __HAVE_DMA */ -- cgit v1.2.3