radeon: setup the ring buffer fetcher to be less agressive.

Signed-off-by: Dave Airlie <airlied@linux.ie>

2 files changed, 62 insertions, 3 deletions

diff --git a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c
index e16294c039e4..020323bd1626 100644
--- a/drivers/char/drm/radeon_cp.c
+++ b/drivers/char/drm/radeon_cp.c
@@ -1190,9 +1190,15 @@ static void radeon_cp_init_ring_buffer(struct drm_device * dev,
         /* Set ring buffer size */
 #ifdef __BIG_ENDIAN
         RADEON_WRITE(RADEON_CP_RB_CNTL,
-                     dev_priv->ring.size_l2qw | RADEON_BUF_SWAP_32BIT);
+                     RADEON_BUF_SWAP_32BIT |
+                     (dev_priv->ring.fetch_size_l2ow << 18) |
+                     (dev_priv->ring.rptr_update_l2qw << 8) |
+                     dev_priv->ring.size_l2qw);
 #else
-        RADEON_WRITE(RADEON_CP_RB_CNTL, dev_priv->ring.size_l2qw);
+        RADEON_WRITE(RADEON_CP_RB_CNTL,
+                     (dev_priv->ring.fetch_size_l2ow << 18) |
+                     (dev_priv->ring.rptr_update_l2qw << 8) |
+                     dev_priv->ring.size_l2qw);
 #endif
 
         /* Start with assuming that writeback doesn't work */
@@ -1663,6 +1669,11 @@ static int radeon_do_init_cp(struct drm_device * dev, drm_radeon_init_t * init)
         dev_priv->ring.size = init->ring_size;
         dev_priv->ring.size_l2qw = drm_order(init->ring_size / 8);
 
+        dev_priv->ring.rptr_update = /* init->rptr_update */ 4096;
+        dev_priv->ring.rptr_update_l2qw = drm_order( /* init->rptr_update */ 4096 / 8);
+
+        dev_priv->ring.fetch_size = /* init->fetch_size */ 32;
+        dev_priv->ring.fetch_size_l2ow = drm_order( /* init->fetch_size */ 32 / 16);
         dev_priv->ring.tail_mask = (dev_priv->ring.size / sizeof(u32)) - 1;
 
         dev_priv->ring.high_mark = RADEON_RING_HIGH_MARK;
diff --git a/drivers/char/drm/radeon_drv.h b/drivers/char/drm/radeon_drv.h
index 8ce4940aba75..443a8952eced 100644
--- a/drivers/char/drm/radeon_drv.h
+++ b/drivers/char/drm/radeon_drv.h
@@ -166,6 +166,12 @@ typedef struct drm_radeon_ring_buffer {
         int size;
         int size_l2qw;
 
+        int rptr_update; /* Double Words */
+        int rptr_update_l2qw; /* log2 Quad Words */
+
+        int fetch_size; /* Double Words */
+        int fetch_size_l2ow; /* log2 Oct Words */
+
         u32 tail;
         u32 tail_mask;
         int space;
@@ -615,9 +621,51 @@ extern int r300_do_cp_cmdbuf(struct drm_device * dev,
 #       define RADEON_SOFT_RESET_E2             (1 <<  5)
 #       define RADEON_SOFT_RESET_RB             (1 <<  6)
 #       define RADEON_SOFT_RESET_HDP            (1 <<  7)
+/*
+ *   6:0  Available slots in the FIFO
+ *   8    Host Interface active
+ *   9    CP request active
+ *   10   FIFO request active
+ *   11   Host Interface retry active
+ *   12   CP retry active
+ *   13   FIFO retry active
+ *   14   FIFO pipeline busy
+ *   15   Event engine busy
+ *   16   CP command stream busy
+ *   17   2D engine busy
+ *   18   2D portion of render backend busy
+ *   20   3D setup engine busy
+ *   26   GA engine busy
+ *   27   CBA 2D engine busy
+ *   31   2D engine busy or 3D engine busy or FIFO not empty or CP busy or
+ *           command stream queue not empty or Ring Buffer not empty
+ */
 #define RADEON_RBBM_STATUS              0x0e40
+/* Same as the previous RADEON_RBBM_STATUS; this is a mirror of that register.  */
+/* #define RADEON_RBBM_STATUS           0x1740 */
+/* bits 6:0 are dword slots available in the cmd fifo */
 #       define RADEON_RBBM_FIFOCNT_MASK         0x007f
-#       define RADEON_RBBM_ACTIVE               (1 << 31)
+#       define RADEON_HIRQ_ON_RBB       (1 <<  8)
+#       define RADEON_CPRQ_ON_RBB       (1 <<  9)
+#       define RADEON_CFRQ_ON_RBB       (1 << 10)
+#       define RADEON_HIRQ_IN_RTBUF     (1 << 11)
+#       define RADEON_CPRQ_IN_RTBUF     (1 << 12)
+#       define RADEON_CFRQ_IN_RTBUF     (1 << 13)
+#       define RADEON_PIPE_BUSY         (1 << 14)
+#       define RADEON_ENG_EV_BUSY       (1 << 15)
+#       define RADEON_CP_CMDSTRM_BUSY   (1 << 16)
+#       define RADEON_E2_BUSY           (1 << 17)
+#       define RADEON_RB2D_BUSY         (1 << 18)
+#       define RADEON_RB3D_BUSY         (1 << 19) /* not used on r300 */
+#       define RADEON_VAP_BUSY          (1 << 20)
+#       define RADEON_RE_BUSY           (1 << 21) /* not used on r300 */
+#       define RADEON_TAM_BUSY          (1 << 22) /* not used on r300 */
+#       define RADEON_TDM_BUSY          (1 << 23) /* not used on r300 */
+#       define RADEON_PB_BUSY           (1 << 24) /* not used on r300 */
+#       define RADEON_TIM_BUSY          (1 << 25) /* not used on r300 */
+#       define RADEON_GA_BUSY           (1 << 26)
+#       define RADEON_CBA2D_BUSY        (1 << 27)
+#       define RADEON_RBBM_ACTIVE       (1 << 31)
 #define RADEON_RE_LINE_PATTERN          0x1cd0
 #define RADEON_RE_MISC                  0x26c4
 #define RADEON_RE_TOP_LEFT              0x26c0