freedreno/registers: Add prefix="variant"

To merge a7xx and a6xx regs, using variant property to manage the
differences, we'll want regs/etc to be named according to the first
generation it is use rather than the domain name.  Add a new prefix
type to accomplish this.  By default, if no variant property, things
will still be named based on domain (ie. REG_A6XX_...), and things
that have variant="A6XX" will also end up as they currently are
(since the chip enum matches domain name), but things that have
variant="A7XX" will end up as REG_A7XX_...

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21846>

src/freedreno/registers/gen_header.py

@@ -296,6 +296,7 @@ class Parser(object):
 		self.current_array = None
 		self.current_domain = None
 		self.current_prefix = None
+		self.current_prefix_type = None
 		self.current_stripe = None
 		self.current_bitset = None
 		self.current_bitsize = 32
@@ -307,8 +308,10 @@ class Parser(object):
 		parser, filename = self.stack[-1]
 		return Error("%s:%d:%d: %s" % (filename, parser.CurrentLineNumber, parser.CurrentColumnNumber, message))
 
-	def prefix(self):
-		if self.current_stripe:
+	def prefix(self, variant=None):
+		if self.current_prefix_type == "variant" and variant:
+			return variant
+		elif self.current_stripe:
 			return self.current_stripe + "_" + self.current_domain
 		elif self.current_prefix:
 			return self.current_prefix + "_" + self.current_domain
@@ -407,7 +410,8 @@ class Parser(object):
 			if "type" in attrs:
 				self.parse_field(None, attrs)
 
-		self.current_reg = Reg(attrs, self.prefix(), self.current_array, bit_size)
+		variant = parse_variants(attrs)
+		self.current_reg = Reg(attrs, self.prefix(variant), self.current_array, bit_size)
 		self.current_reg.bitset = self.current_bitset
 
 		if len(self.stack) == 1:
@@ -419,8 +423,12 @@ class Parser(object):
 			self.do_parse(os.path.join(self.path, filename))
 		elif name == "domain":
 			self.current_domain = attrs["name"]
-			if "prefix" in attrs and attrs["prefix"] == "chip":
+			if "prefix" in attrs:
 				self.current_prefix = parse_variants(attrs)
+				self.current_prefix_type = attrs["prefix"]
+			else:
+				self.current_prefix = None
+				self.current_prefix_type = None
 		elif name == "stripe":
 			self.current_stripe = parse_variants(attrs)
 		elif name == "enum":
@@ -442,7 +450,8 @@ class Parser(object):
 			self.parse_reg(attrs, 64)
 		elif name == "array":
 			self.current_bitsize = 32
-			self.current_array = Array(attrs, self.prefix())
+			variant = parse_variants(attrs)
+			self.current_array = Array(attrs, self.prefix(variant))
 			if len(self.stack) == 1:
 				self.file.append(self.current_array)
 		elif name == "bitset":
@@ -461,6 +470,7 @@ class Parser(object):
 		if name == "domain":
 			self.current_domain = None
 			self.current_prefix = None
+			self.current_prefix_type = None
 		elif name == "stripe":
 			self.current_stripe = None
 		elif name == "bitset":

src/freedreno/registers/rules-ng.xsd

@@ -218,6 +218,7 @@
 		<attribute name="inline" type="rng:Boolean" use="optional" />
 		<attribute name="bare" type="rng:Boolean" use="optional" />
 		<attribute name="prefix" type="NMTOKENS" use="optional" />
+		<attribute name="varset" type="NMTOKEN" use="optional" />
 	</complexType>
 
 	<complexType name="bitfieldType">