drm: SiS 315 Awareness.

Add support for the SiS 315 to the DRM.

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

4 files changed, 84 insertions, 1 deletions

diff --git a/drivers/char/drm/drm_pciids.h b/drivers/char/drm/drm_pciids.h
index bf9bdc50c1e3..8c16cde91133 100644
--- a/drivers/char/drm/drm_pciids.h
+++ b/drivers/char/drm/drm_pciids.h
@@ -209,6 +209,7 @@
         {0x1039, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
         {0x1039, 0x5300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
         {0x1039, 0x6300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
+        {0x1039, 0x6330, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_CHIP_315}, \
         {0x1039, 0x7300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
         {0, 0, 0}
 
diff --git a/drivers/char/drm/sis_drv.c b/drivers/char/drm/sis_drv.c
index 93880e449201..3d5b3218b6ff 100644
--- a/drivers/char/drm/sis_drv.c
+++ b/drivers/char/drm/sis_drv.c
@@ -69,6 +69,7 @@ static struct drm_driver driver = {
         .load = sis_driver_load,
         .unload = sis_driver_unload,
         .context_dtor = NULL,
+        .dma_quiescent = sis_idle,
         .reclaim_buffers = NULL,
         .reclaim_buffers_locked = sis_reclaim_buffers_locked,
         .lastclose = sis_lastclose,
diff --git a/drivers/char/drm/sis_drv.h b/drivers/char/drm/sis_drv.h
index 330a2c4eade2..2b8d6f6ed7c0 100644
--- a/drivers/char/drm/sis_drv.h
+++ b/drivers/char/drm/sis_drv.h
@@ -34,13 +34,22 @@
 #define DRIVER_AUTHOR           "SIS, Tungsten Graphics"
 #define DRIVER_NAME             "sis"
 #define DRIVER_DESC             "SIS 300/630/540"
-#define DRIVER_DATE             "20060529"
+#define DRIVER_DATE             "20060704"
 #define DRIVER_MAJOR            1
 #define DRIVER_MINOR            2
 #define DRIVER_PATCHLEVEL       1
 
+enum sis_family {
+        SIS_OTHER = 0,
+        SIS_CHIP_315 = 1,
+};
+
 #include "drm_sman.h"
 
+#define SIS_BASE (dev_priv->mmio)
+#define SIS_READ(reg)         DRM_READ32(SIS_BASE, reg);
+#define SIS_WRITE(reg, val)   DRM_WRITE32(SIS_BASE, reg, val);
+
 typedef struct drm_sis_private {
         drm_local_map_t *mmio;
         unsigned int idle_fault;
@@ -52,6 +61,7 @@ typedef struct drm_sis_private {
         unsigned long agp_offset;
 } drm_sis_private_t;
 
+extern int sis_idle(drm_device_t *dev);
 extern void sis_reclaim_buffers_locked(drm_device_t *dev, struct file *filp);
 extern void sis_lastclose(drm_device_t *dev);
 
diff --git a/drivers/char/drm/sis_mm.c b/drivers/char/drm/sis_mm.c
index 0eb1dca232b7..3041c5b42d56 100644
--- a/drivers/char/drm/sis_mm.c
+++ b/drivers/char/drm/sis_mm.c
@@ -226,6 +226,76 @@ static int sis_ioctl_agp_alloc(DRM_IOCTL_ARGS)
         return sis_drm_alloc(dev, priv, data, AGP_TYPE);
 }
 
+static drm_local_map_t *sis_reg_init(drm_device_t *dev)
+{
+        drm_map_list_t *entry;
+        drm_local_map_t *map;
+
+        list_for_each_entry(entry, &dev->maplist->head, head) {
+                map = entry->map;
+                if (!map)
+                        continue;
+                if (map->type == _DRM_REGISTERS) {
+                        return map;
+                }
+        }
+        return NULL;
+}
+
+int sis_idle(drm_device_t *dev)
+{
+        drm_sis_private_t *dev_priv = dev->dev_private;
+        uint32_t idle_reg;
+        unsigned long end;
+        int i;
+
+        if (dev_priv->idle_fault)
+                return 0;
+
+        if (dev_priv->mmio == NULL) {
+                dev_priv->mmio = sis_reg_init(dev);
+                if (dev_priv->mmio == NULL) {
+                        DRM_ERROR("Could not find register map.\n");
+                        return 0;
+                }
+        }
+        
+        /*
+         * Implement a device switch here if needed
+         */
+
+        if (dev_priv->chipset != SIS_CHIP_315)
+                return 0;
+
+        /*
+         * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
+         * because its polling frequency is too low.
+         */
+
+        end = jiffies + (DRM_HZ * 3);
+
+        for (i=0; i<4; ++i) {
+                do {
+                        idle_reg = SIS_READ(0x85cc);
+                } while ( !time_after_eq(jiffies, end) &&
+                          ((idle_reg & 0x80000000) != 0x80000000));
+        }
+
+        if (time_after_eq(jiffies, end)) {
+                DRM_ERROR("Graphics engine idle timeout. "
+                          "Disabling idle check\n");
+                dev_priv->idle_fault = TRUE;
+        }
+
+        /*
+         * The caller never sees an error code. It gets trapped
+         * in libdrm.
+         */
+
+        return 0;
+}
+
+
 void sis_lastclose(struct drm_device *dev)
 {
         drm_sis_private_t *dev_priv = dev->dev_private;
@@ -237,6 +307,7 @@ void sis_lastclose(struct drm_device *dev)
         drm_sman_cleanup(&dev_priv->sman);
         dev_priv->vram_initialized = FALSE;
         dev_priv->agp_initialized = FALSE;
+        dev_priv->mmio = NULL;
         mutex_unlock(&dev->struct_mutex);
 }