drm/i915/gvt: introduce a new flag F_CMD_WRITE_PATCH

F_CMD_WRITE_PATCH means command write to this register needs to be patched

Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20201223034553.17272-1-yan.y.zhao@intel.com
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index f82ad5a93720ebc82ddab8d36a51ce748441a7f4..eb5d8dcd258d473ed52c10f5fa2858d5e4a24138 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -261,6 +261,8 @@ struct intel_gvt_mmio {
  * logical context image
  */
 #define F_SR_IN_CTX    (1 << 7)
+/* Value of command write of this reg needs to be patched */
+#define F_CMD_WRITE_PATCH      (1 << 8)
 
        struct gvt_mmio_block *mmio_block;
        unsigned int num_mmio_block;
@@ -685,6 +687,35 @@ static inline void intel_gvt_mmio_set_sr_in_ctx(
 }
 
 void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu);
+/**
+ * intel_gvt_mmio_set_cmd_write_patch -
+ *                             mark an MMIO if its cmd write needs to be
+ *                             patched
+ * @gvt: a GVT device
+ * @offset: register offset
+ *
+ */
+static inline void intel_gvt_mmio_set_cmd_write_patch(
+                       struct intel_gvt *gvt, unsigned int offset)
+{
+       gvt->mmio.mmio_attribute[offset >> 2] |= F_CMD_WRITE_PATCH;
+}
+
+/**
+ * intel_gvt_mmio_is_cmd_write_patch - check if an mmio's cmd access needs to
+ * be patched
+ * @gvt: a GVT device
+ * @offset: register offset
+ *
+ * Returns:
+ * True if GPU commmand write to an MMIO should be patched
+ */
+static inline bool intel_gvt_mmio_is_cmd_write_patch(
+                       struct intel_gvt *gvt, unsigned int offset)
+{
+       return gvt->mmio.mmio_attribute[offset >> 2] & F_CMD_WRITE_PATCH;
+}
+
 void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu);
 void intel_gvt_debugfs_init(struct intel_gvt *gvt);
 void intel_gvt_debugfs_clean(struct intel_gvt *gvt);