From e15b0b6a1b95e4145363b15e1a581ee230b2f9a2 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Wed, 23 Apr 2003 23:42:29 +0000
Subject: Install dummy/noop read & poll fops unless the driver has
 replacements.

---
 linux/drmP.h     |  2 ++
 linux/drm_drv.h  |  8 ++++++++
 linux/drm_fops.h | 13 +++++++++++++
 linux/gamma.h    | 22 ++++------------------
 4 files changed, 27 insertions(+), 18 deletions(-)

(limited to 'linux')

diff --git a/linux/drmP.h b/linux/drmP.h
index 2cdc5f09..8ebd1ec8 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -684,6 +684,8 @@ extern void	     DRM(vm_shm_close)(struct vm_area_struct *vma);
 extern int	     DRM(mmap_dma)(struct file *filp,
 				   struct vm_area_struct *vma);
 extern int	     DRM(mmap)(struct file *filp, struct vm_area_struct *vma);
+extern unsigned int  DRM(poll)(struct file *filp, struct poll_table_struct *wait);
+extern ssize_t       DRM(read)(struct file *filp, char *buf, size_t count, loff_t *off);
 
 				/* Memory management support (drm_memory.h) */
 extern void	     DRM(mem_init)(void);
diff --git a/linux/drm_drv.h b/linux/drm_drv.h
index 036cee35..dad961f8 100644
--- a/linux/drm_drv.h
+++ b/linux/drm_drv.h
@@ -84,6 +84,12 @@
 #ifndef __HAVE_SG
 #define __HAVE_SG			0
 #endif
+#ifndef __HAVE_DRIVER_FOPS_READ
+#define __HAVE_DRIVER_FOPS_READ		0
+#endif
+#ifndef __HAVE_DRIVER_FOPS_POLL
+#define __HAVE_DRIVER_FOPS_POLL		0
+#endif
 
 #ifndef DRIVER_PREINIT
 #define DRIVER_PREINIT()
@@ -119,6 +125,8 @@ static struct file_operations	DRM(fops) = {	\
 	.ioctl	 = DRM(ioctl),			\
 	.mmap	 = DRM(mmap),			\
 	.fasync  = DRM(fasync),			\
+	.poll	 = DRM(poll),			\
+	.read	 = DRM(read),			\
 }
 #endif
 
diff --git a/linux/drm_fops.h b/linux/drm_fops.h
index 3baac693..fc8618e1 100644
--- a/linux/drm_fops.h
+++ b/linux/drm_fops.h
@@ -113,4 +113,17 @@ int DRM(fasync)(int fd, struct file *filp, int on)
 	return 0;
 }
 
+#if !__HAVE_DRIVER_FOPS_POLL
+unsigned int DRM(poll)(struct file *filp, struct poll_table_struct *wait)
+{
+	return 0;
+}
+#endif
+
 
+#if !__HAVE_DRIVER_FOPS_READ
+ssize_t DRM(read)(struct file *filp, char *buf, size_t count, loff_t *off)
+{
+	return 0;
+}
+#endif
diff --git a/linux/gamma.h b/linux/gamma.h
index a5090c84..bff3f909 100644
--- a/linux/gamma.h
+++ b/linux/gamma.h
@@ -71,6 +71,9 @@
 #define __HAVE_OLD_DMA			1
 #define __HAVE_PCI_DMA			1
 
+#define __HAVE_DRIVER_FOPS_READ		1
+#define __HAVE_DRIVER_FOPS_POLL		1
+
 #define __HAVE_MULTIPLE_DMA_QUEUES	1
 #define __HAVE_DMA_WAITQUEUE		1
 
@@ -88,7 +91,7 @@
 #define __HAVE_DMA_QUIESCENT		1
 #define DRIVER_DMA_QUIESCENT() do {					\
 	/* FIXME ! */ 							\
-	gamma_dma_quiescent_single(dev);					\
+	gamma_dma_quiescent_single(dev);				\
 	return 0;							\
 } while (0)
 
@@ -98,22 +101,5 @@
 #define DRIVER_AGP_BUFFERS_MAP( dev )					\
 	((drm_gamma_private_t *)((dev)->dev_private))->buffers
 
-/* Gamma makes use of a wierd mechanism to get the DDX driver to do
- * context switches on behalf of the 3d clients via a trip to the
- * kernel module.  This requires read/poll functionality on the drm
- * file descriptor not normally present:
- */
-#define DRIVER_FOPS				\
-static struct file_operations	DRM(fops) = {	\
-	.owner   = THIS_MODULE,			\
-	.open	 = DRM(open),			\
-	.flush	 = DRM(flush),			\
-	.release = DRM(release),		\
-	.ioctl	 = DRM(ioctl),			\
-	.mmap	 = DRM(mmap),			\
-	.read	 = DRM(read),			\
-	.fasync  = DRM(fasync),			\
-	.poll	 = DRM(poll),			\
-}
 
 #endif /* __GAMMA_H__ */
-- 
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