drm/i915: Update gen12 forcewake table

The bspec's forcewake page was very stale and out of date for recent
platforms.  The hardware team finally provided us with an updated gen12
table (which applies to TGL, RKL, and DG1) and there are a lot of
changes.

v2:
 - Add comments showing the subregions of ranges that we've combined for
   ease of code review.  (Jose)
 - Rebase on the s/FORCEWAKE_BLITTER/FORCEWAKE_GT/ patch

Bspec: 66696
Cc: Caz Yokoyama <caz.yokoyama@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201009194442.3668677-3-matthew.d.roper@intel.comReviewed-by: José Roberto de Souza <jose.souza@intel.com>

drivers/gpu/drm/i915/intel_uncore.c

@@ -1124,44 +1124,113 @@ static const struct intel_forcewake_range __gen11_fw_ranges[] = {
 	GEN_FW_RANGE(0x1d4000, 0x1dbfff, 0)
 };
 
-/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
+/*
+ * *Must* be sorted by offset ranges! See intel_fw_table_check().
+ *
+ * Note that the spec lists several reserved/unused ranges that don't
+ * actually contain any registers.  In the table below we'll combine those
+ * reserved ranges with either the preceding or following range to keep the
+ * table small and lookups fast.
+ */
 static const struct intel_forcewake_range __gen12_fw_ranges[] = {
-	GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
+	GEN_FW_RANGE(0x0, 0x1fff, 0), /*
+		0x0   -  0xaff: reserved
+		0xb00 - 0x1fff: always on */
 	GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_GT),
+	GEN_FW_RANGE(0x2700, 0x27ff, FORCEWAKE_GT),
+	GEN_FW_RANGE(0x2800, 0x2aff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x2b00, 0x2fff, FORCEWAKE_GT),
 	GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_GT), /*
+		0x4000 - 0x48ff: gt
+		0x4900 - 0x51ff: reserved */
+	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER), /*
+		0x5200 - 0x53ff: render
+		0x5400 - 0x54ff: reserved
+		0x5500 - 0x7fff: render */
 	GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_GT),
 	GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_GT),
+	GEN_FW_RANGE(0x8160, 0x81ff, 0), /*
+		0x8160 - 0x817f: reserved
+		0x8180 - 0x81ff: always on */
+	GEN_FW_RANGE(0x8200, 0x82ff, FORCEWAKE_GT),
 	GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x8500, 0x8bff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_ALL),
+	GEN_FW_RANGE(0x8500, 0x94cf, FORCEWAKE_GT), /*
+		0x8500 - 0x87ff: gt
+		0x8800 - 0x8fff: reserved
+		0x9000 - 0x947f: gt
+		0x9480 - 0x94cf: reserved */
+	GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x9560, 0x97ff, 0), /*
+		0x9560 - 0x95ff: always on
+		0x9600 - 0x97ff: reserved */
 	GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0xb480, 0xdfff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0xe900, 0x147ff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0x14800, 0x148ff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x14900, 0x19fff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0x1a000, 0x1a7ff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x1a800, 0x1afff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0x1b000, 0x1bfff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x1c000, 0x243ff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0x24800, 0x3ffff, FORCEWAKE_GT),
+	GEN_FW_RANGE(0xb000, 0xb3ff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0xb400, 0xcfff, FORCEWAKE_GT), /*
+		0xb400 - 0xbf7f: gt
+		0xb480 - 0xbfff: reserved
+		0xc000 - 0xcfff: gt */
+	GEN_FW_RANGE(0xd000, 0xd7ff, 0),
+	GEN_FW_RANGE(0xd800, 0xd8ff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0xd900, 0xdbff, FORCEWAKE_GT),
+	GEN_FW_RANGE(0xdc00, 0xefff, FORCEWAKE_RENDER), /*
+		0xdc00 - 0xddff: render
+		0xde00 - 0xde7f: reserved
+		0xde80 - 0xe8ff: render
+		0xe900 - 0xefff: reserved */
+	GEN_FW_RANGE(0xf000, 0x147ff, FORCEWAKE_GT), /*
+		 0xf000 - 0xffff: gt
+		0x10000 - 0x147ff: reserved */
+	GEN_FW_RANGE(0x14800, 0x1ffff, FORCEWAKE_RENDER), /*
+		0x14800 - 0x14fff: render
+		0x15000 - 0x16dff: reserved
+		0x16e00 - 0x1bfff: render
+		0x1c000 - 0x1ffff: reserved */
+	GEN_FW_RANGE(0x20000, 0x20fff, FORCEWAKE_MEDIA_VDBOX0),
+	GEN_FW_RANGE(0x21000, 0x21fff, FORCEWAKE_MEDIA_VDBOX2),
+	GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_GT),
+	GEN_FW_RANGE(0x24000, 0x2417f, 0), /*
+		0x24000 - 0x2407f: always on
+		0x24080 - 0x2417f: reserved */
+	GEN_FW_RANGE(0x24180, 0x249ff, FORCEWAKE_GT), /*
+		0x24180 - 0x241ff: gt
+		0x24200 - 0x249ff: reserved */
+	GEN_FW_RANGE(0x24a00, 0x251ff, FORCEWAKE_RENDER), /*
+		0x24a00 - 0x24a7f: render
+		0x24a80 - 0x251ff: reserved */
+	GEN_FW_RANGE(0x25200, 0x255ff, FORCEWAKE_GT), /*
+		0x25200 - 0x252ff: gt
+		0x25300 - 0x255ff: reserved */
+	GEN_FW_RANGE(0x25600, 0x2567f, FORCEWAKE_MEDIA_VDBOX0),
+	GEN_FW_RANGE(0x25680, 0x259ff, FORCEWAKE_MEDIA_VDBOX2), /*
+		0x25680 - 0x256ff: VD2
+		0x25700 - 0x259ff: reserved */
+	GEN_FW_RANGE(0x25a00, 0x25a7f, FORCEWAKE_MEDIA_VDBOX0),
+	GEN_FW_RANGE(0x25a80, 0x2ffff, FORCEWAKE_MEDIA_VDBOX2), /*
+		0x25a80 - 0x25aff: VD2
+		0x25b00 - 0x2ffff: reserved */
+	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_GT),
 	GEN_FW_RANGE(0x40000, 0x1bffff, 0),
-	GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
-	GEN_FW_RANGE(0x1c4000, 0x1c7fff, FORCEWAKE_MEDIA_VDBOX1),
-	GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0),
-	GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_GT),
-	GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
-	GEN_FW_RANGE(0x1d4000, 0x1d7fff, FORCEWAKE_MEDIA_VDBOX3),
-	GEN_FW_RANGE(0x1d8000, 0x1dbfff, FORCEWAKE_MEDIA_VEBOX1)
+	GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0), /*
+		0x1c0000 - 0x1c2bff: VD0
+		0x1c2c00 - 0x1c2cff: reserved
+		0x1c2d00 - 0x1c2dff: VD0
+		0x1c2e00 - 0x1c3eff: reserved
+		0x1c3f00 - 0x1c3fff: VD0 */
+	GEN_FW_RANGE(0x1c4000, 0x1c7fff, 0),
+	GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0), /*
+		0x1c8000 - 0x1ca0ff: VE0
+		0x1ca100 - 0x1cbeff: reserved
+		0x1cbf00 - 0x1cbfff: VE0 */
+	GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_MEDIA_VDBOX0), /*
+		0x1cc000 - 0x1ccfff: VD0
+		0x1cd000 - 0x1cffff: reserved */
+	GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2), /*
+		0x1d0000 - 0x1d2bff: VD2
+		0x1d2c00 - 0x1d2cff: reserved
+		0x1d2d00 - 0x1d2dff: VD2
+		0x1d2e00 - 0x1d3eff: reserved
+		0x1d3f00 - 0x1d3fff: VD2 */
 };
 
 static void