From: Brad Volkin <bradley.d.vol...@intel.com>
The command parser needs to know a few things about certain commands
in order to process them correctly. Add structures for storing that
information.
OTC-Tracker: AXIA-4631
Change-Id: I50b98c71c6655893291c78a2d1b8954577b37a30
Signed-off-by: Brad Volkin <bradley.d.vol...@intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 51 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 14f250a..ff1e201 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1731,6 +1731,57 @@ struct drm_i915_file_private {
atomic_t rps_wait_boost;
};
+/**
+ * A command that requires special handling by the command parser.
+ */
+struct drm_i915_cmd_descriptor {
+ /**
+ * Flags describing how the command parser processes the command.
+ *
+ * CMD_DESC_FIXED: The command has a fixed length if this is set,
+ * a length mask if not set
+ * CMD_DESC_SKIP: The command is allowed but does not follow the
+ * standard length encoding for the opcode range in
+ * which it falls
+ */
+ u32 flags;
+#define CMD_DESC_FIXED (1<<0)
+#define CMD_DESC_SKIP (1<<1)
+
+ /**
+ * The command's unique identification bits and the bitmask to get them.
+ * This isn't strictly the opcode field as defined in the spec and may
+ * also include type, subtype, and/or subop fields.
+ */
+ struct {
+ u32 value;
+ u32 mask;
+ } cmd;
+
+ /**
+ * The command's length. The command is either fixed length (i.e. does
+ * not include a length field) or has a length field mask. The flag
+ * CMD_DESC_FIXED indicates a fixed length. Otherwise, the command has
+ * a length mask. All command entries in a command table must include
+ * length information.
+ */
+ union {
+ u32 fixed;
+ u32 mask;
+ } length;
+};
+
+/**
+ * A table of commands requiring special handling by the command parser.
+ *
+ * Each ring has an array of tables. Each table consists of an array of command
+ * descriptors, which must be sorted with command opcodes in ascending order.
+ */
+struct drm_i915_cmd_table {
+ const struct drm_i915_cmd_descriptor *table;
+ int count;
+};
+
#define INTEL_INFO(dev) (to_i915(dev)->info)
#define IS_I830(dev) ((dev)->pdev->device == 0x3577)
--
1.8.4.4
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