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authorDave Airlie <airlied@linux.ie>2007-10-29 15:14:03 +1000
committerDave Airlie <airlied@redhat.com>2008-02-05 14:33:32 +1000
commita13af4b4d842da6d7065b8c73fa8f0ac58fea1b6 (patch)
tree3269002c62ee1f10728cfa5a9782225329166d6b /drivers
parent9ef9dc69d4167276c04590d67ee55de8380bc1ad (diff)
agp: add chipset flushing support to AGP interface
This bumps the AGP interface to 0.103. Certain Intel chipsets contains a global write buffer, and this can require flushing from the drm or X.org to make sure all data has hit RAM before initiating a GPU transfer, due to a lack of coherency with the integrated graphics device and this buffer. This just adds generic support to the AGP interfaces, a follow-on patch will add support to the Intel driver to use this interface. Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/agp/agp.h3
-rw-r--r--drivers/char/agp/backend.c2
-rw-r--r--drivers/char/agp/compat_ioctl.c4
-rw-r--r--drivers/char/agp/compat_ioctl.h2
-rw-r--r--drivers/char/agp/frontend.c11
-rw-r--r--drivers/char/agp/generic.c7
6 files changed, 27 insertions, 2 deletions
diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index b83824c4132..9ec9374ccc4 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -117,7 +117,8 @@ struct agp_bridge_driver {
void (*free_by_type)(struct agp_memory *);
void *(*agp_alloc_page)(struct agp_bridge_data *);
void (*agp_destroy_page)(void *, int flags);
- int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);
+ int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);
+ void (*chipset_flush)(struct agp_bridge_data *);
};
struct agp_bridge_data {
diff --git a/drivers/char/agp/backend.c b/drivers/char/agp/backend.c
index 2720882e66f..b1bdd015165 100644
--- a/drivers/char/agp/backend.c
+++ b/drivers/char/agp/backend.c
@@ -43,7 +43,7 @@
* fix some real stupidity. It's only by chance we can bump
* past 0.99 at all due to some boolean logic error. */
#define AGPGART_VERSION_MAJOR 0
-#define AGPGART_VERSION_MINOR 102
+#define AGPGART_VERSION_MINOR 103
static const struct agp_version agp_current_version =
{
.major = AGPGART_VERSION_MAJOR,
diff --git a/drivers/char/agp/compat_ioctl.c b/drivers/char/agp/compat_ioctl.c
index ecd4248861b..39275794fe6 100644
--- a/drivers/char/agp/compat_ioctl.c
+++ b/drivers/char/agp/compat_ioctl.c
@@ -273,6 +273,10 @@ long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case AGPIOC_UNBIND32:
ret_val = compat_agpioc_unbind_wrap(curr_priv, (void __user *) arg);
break;
+
+ case AGPIOC_CHIPSET_FLUSH32:
+ ret_val = agpioc_chipset_flush_wrap(curr_priv);
+ break;
}
ioctl_out:
diff --git a/drivers/char/agp/compat_ioctl.h b/drivers/char/agp/compat_ioctl.h
index 71939d63723..0c9678ac037 100644
--- a/drivers/char/agp/compat_ioctl.h
+++ b/drivers/char/agp/compat_ioctl.h
@@ -39,6 +39,7 @@
#define AGPIOC_DEALLOCATE32 _IOW (AGPIOC_BASE, 7, compat_int_t)
#define AGPIOC_BIND32 _IOW (AGPIOC_BASE, 8, compat_uptr_t)
#define AGPIOC_UNBIND32 _IOW (AGPIOC_BASE, 9, compat_uptr_t)
+#define AGPIOC_CHIPSET_FLUSH32 _IO (AGPIOC_BASE, 10)
struct agp_info32 {
struct agp_version version; /* version of the driver */
@@ -101,5 +102,6 @@ void agp_free_memory_wrap(struct agp_memory *memory);
struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type);
struct agp_memory *agp_find_mem_by_key(int key);
struct agp_client *agp_find_client_by_pid(pid_t id);
+int agpioc_chipset_flush_wrap(struct agp_file_private *priv);
#endif /* _AGP_COMPAT_H */
diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c
index 7791e98de51..9bd5a958954 100644
--- a/drivers/char/agp/frontend.c
+++ b/drivers/char/agp/frontend.c
@@ -960,6 +960,13 @@ static int agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg)
return agp_unbind_memory(memory);
}
+int agpioc_chipset_flush_wrap(struct agp_file_private *priv)
+{
+ DBG("");
+ agp_flush_chipset(agp_bridge);
+ return 0;
+}
+
static int agp_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
@@ -1033,6 +1040,10 @@ static int agp_ioctl(struct inode *inode, struct file *file,
case AGPIOC_UNBIND:
ret_val = agpioc_unbind_wrap(curr_priv, (void __user *) arg);
break;
+
+ case AGPIOC_CHIPSET_FLUSH:
+ ret_val = agpioc_chipset_flush_wrap(curr_priv);
+ break;
}
ioctl_out:
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index 1a4674ce0c7..7484bc759c4 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -80,6 +80,13 @@ static int agp_get_key(void)
return -1;
}
+void agp_flush_chipset(struct agp_bridge_data *bridge)
+{
+ if (bridge->driver->chipset_flush)
+ bridge->driver->chipset_flush(bridge);
+}
+EXPORT_SYMBOL(agp_flush_chipset);
+
/*
* Use kmalloc if possible for the page list. Otherwise fall back to
* vmalloc. This speeds things up and also saves memory for small AGP