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-rw-r--r--shared/via_dma.c96
1 files changed, 45 insertions, 51 deletions
diff --git a/shared/via_dma.c b/shared/via_dma.c
index 9b913f36..69e71bd8 100644
--- a/shared/via_dma.c
+++ b/shared/via_dma.c
@@ -17,17 +17,57 @@
#include "via_drm.h"
#include "via_drv.h"
-
-
-
-static inline uint32_t * via_check_dma(drm_via_private_t * dev_priv,
- unsigned int size);
static void via_cmdbuf_start(drm_via_private_t * dev_priv);
static void via_cmdbuf_pause(drm_via_private_t * dev_priv);
static void via_cmdbuf_reset(drm_via_private_t * dev_priv);
static void via_cmdbuf_rewind(drm_via_private_t * dev_priv);
static int via_wait_idle(drm_via_private_t * dev_priv);
+static inline int
+via_cmdbuf_wait(drm_via_private_t * dev_priv, unsigned int size)
+{
+ uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
+ uint32_t cur_addr, hw_addr, next_addr;
+ volatile uint32_t * hw_addr_ptr;
+ uint32_t count;
+ hw_addr_ptr = dev_priv->hw_addr_ptr;
+ cur_addr = agp_base + dev_priv->dma_low;
+ /* At high resolution (i.e. 1280x1024) and with high workload within
+ * a short commmand stream, the following test will fail. It may be
+ * that the engine is too busy to update hw_addr. Therefore, add
+ * a large 64KB window between buffer head and tail.
+ */
+ next_addr = cur_addr + size + 64 * 1024;
+ count = 1000000; /* How long is this? */
+ do {
+ hw_addr = *hw_addr_ptr;
+ if (count-- == 0) {
+ DRM_ERROR("via_cmdbuf_wait timed out hw %x dma_low %x\n",
+ hw_addr, dev_priv->dma_low);
+ return -1;
+ }
+ } while ((cur_addr < hw_addr) && (next_addr >= hw_addr));
+ return 0;
+}
+
+/*
+ * Checks whether buffer head has reach the end. Rewind the ring buffer
+ * when necessary.
+ *
+ * Returns virtual pointer to ring buffer.
+ */
+static inline uint32_t *
+via_check_dma(drm_via_private_t * dev_priv, unsigned int size)
+{
+ if ((dev_priv->dma_low + size + 0x400) > dev_priv->dma_high) {
+ via_cmdbuf_rewind(dev_priv);
+ }
+ if (via_cmdbuf_wait(dev_priv, size) != 0) {
+ return NULL;
+ }
+
+ return (uint32_t*)(dev_priv->dma_ptr + dev_priv->dma_low);
+}
int via_dma_cleanup(drm_device_t *dev)
{
@@ -224,52 +264,6 @@ via_align_buffer(drm_via_private_t * dev_priv, uint32_t * vb, int qw_count)
return vb;
}
-static inline int
-via_cmdbuf_wait(drm_via_private_t * dev_priv, unsigned int size)
-{
- uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
- uint32_t cur_addr, hw_addr, next_addr;
- volatile uint32_t * hw_addr_ptr;
- uint32_t count;
- hw_addr_ptr = dev_priv->hw_addr_ptr;
- cur_addr = agp_base + dev_priv->dma_low;
- /* At high resolution (i.e. 1280x1024) and with high workload within
- * a short commmand stream, the following test will fail. It may be
- * that the engine is too busy to update hw_addr. Therefore, add
- * a large 64KB window between buffer head and tail.
- */
- next_addr = cur_addr + size + 64 * 1024;
- count = 1000000; /* How long is this? */
- do {
- hw_addr = *hw_addr_ptr;
- if (count-- == 0) {
- DRM_ERROR("via_cmdbuf_wait timed out hw %x dma_low %x\n",
- hw_addr, dev_priv->dma_low);
- return -1;
- }
- } while ((cur_addr < hw_addr) && (next_addr >= hw_addr));
- return 0;
-}
-
-/*
- * Checks whether buffer head has reach the end. Rewind the ring buffer
- * when necessary.
- *
- * Returns virtual pointer to ring buffer.
- */
-static inline uint32_t *
-via_check_dma(drm_via_private_t * dev_priv, unsigned int size)
-{
- if ((dev_priv->dma_low + size + 0x400) > dev_priv->dma_high) {
- via_cmdbuf_rewind(dev_priv);
- }
- if (via_cmdbuf_wait(dev_priv, size) != 0) {
- return NULL;
- }
-
- return (uint32_t*)(dev_priv->dma_ptr + dev_priv->dma_low);
-}
-
/*
* This function is used internally by ring buffer mangement code.
*