drm/i915: introduce intel_ring_buffer structure (V2)

[net-next-2.6.git] / drivers / gpu / drm / i915 / i915_drv.c

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index cc03537bb883e06fd37a5e8bab8ce348e58062ad..c57c54f403da8fd70f2c4b86e5acb1a3933664a1 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -188,6 +188,35 @@ const static struct pci_device_id pciidlist[] = {
 MODULE_DEVICE_TABLE(pci, pciidlist);
 #endif
 
+#define INTEL_PCH_DEVICE_ID_MASK       0xff00
+#define INTEL_PCH_CPT_DEVICE_ID_TYPE   0x1c00
+
+void intel_detect_pch (struct drm_device *dev)
+{
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       struct pci_dev *pch;
+
+       /*
+        * The reason to probe ISA bridge instead of Dev31:Fun0 is to
+        * make graphics device passthrough work easy for VMM, that only
+        * need to expose ISA bridge to let driver know the real hardware
+        * underneath. This is a requirement from virtualization team.
+        */
+       pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
+       if (pch) {
+               if (pch->vendor == PCI_VENDOR_ID_INTEL) {
+                       int id;
+                       id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
+
+                       if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
+                               dev_priv->pch_type = PCH_CPT;
+                               DRM_DEBUG_KMS("Found CougarPoint PCH\n");
+                       }
+               }
+               pci_dev_put(pch);
+       }
+}
+
 static int i915_drm_freeze(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -359,33 +388,10 @@ int i965_reset(struct drm_device *dev, u8 flags)
         * switched away).
         */
        if (drm_core_check_feature(dev, DRIVER_MODESET) ||
-           !dev_priv->mm.suspended) {
-               drm_i915_ring_buffer_t *ring = &dev_priv->ring;
-               struct drm_gem_object *obj = ring->ring_obj;
-               struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);
+                       !dev_priv->mm.suspended) {
+               struct intel_ring_buffer *ring = &dev_priv->render_ring;
                dev_priv->mm.suspended = 0;
-
-               /* Stop the ring if it's running. */
-               I915_WRITE(PRB0_CTL, 0);
-               I915_WRITE(PRB0_TAIL, 0);
-               I915_WRITE(PRB0_HEAD, 0);
-
-               /* Initialize the ring. */
-               I915_WRITE(PRB0_START, obj_priv->gtt_offset);
-               I915_WRITE(PRB0_CTL,
-                          ((obj->size - 4096) & RING_NR_PAGES) |
-                          RING_NO_REPORT |
-                          RING_VALID);
-               if (!drm_core_check_feature(dev, DRIVER_MODESET))
-                       i915_kernel_lost_context(dev);
-               else {
-                       ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-                       ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
-                       ring->space = ring->head - (ring->tail + 8);
-                       if (ring->space < 0)
-                               ring->space += ring->Size;
-               }
-
+               ring->init(dev, ring);
                mutex_unlock(&dev->struct_mutex);
                drm_irq_uninstall(dev);
                drm_irq_install(dev);