libpacket2 with VU support (#149)

* added VU1 support!

* small fixes

* fixed documentation

* added packet2 structs and enums

* added packet2 send wrapper in libdma

* fixed enums, added tte

* added chain functions

* added unpack modes to types

* added vif related functions

* removed unecessary comment

* changed naming convention

* changed naming convention

* fixed include dependency

* added packet2

* moved vu1 class from libdraw to sample

* implemented packet2 in sample

* refactored vu1.c to libvu

* moved vif_added_bytes to packet2

* fixed flush cache bug

* refactored libvu

* fixed spaces

* small naming fix

* added channel choice in upload_program()

* naming fixes + wait gif tag

* small upgrade to start program

* removed unecessary flush

* refactored to one create() func

* moved vu stuff from libvu to libpacket2

* fixed typo

* -_vu_unpack_add*, refactored _vu to _helpers

* comments fix

* changed helpers to utils

* added print(), fixed bug in add()

* added offset, double buffer to open_unpack()

* moved func upload_program() added "utils_"

* +print_qw(), changed packet2_add()

* added some warning in comment

* changed offset to dest_address, fixed counting bug

* refactored sample

* dma wait() before send()

ee/Makefile

@@ -8,7 +8,7 @@
 
 SUBDIRS = erl kernel kernel-nopatch libc rpc debug \
 	eedebug sbv dma graph math3d \
-	packet draw erl-loader mpeg libgs \
+	packet packet2 draw erl-loader mpeg libgs \
 	libvux font input inputx network iopreboot \
 	elf-loader
 

ee/dma/Makefile

@@ -8,6 +8,8 @@
 
 EE_OBJS = dma.o erl-support.o
 
+EE_INCS := $(EE_INCS) -I$(PS2SDKSRC)/ee/packet2/include
+
 include $(PS2SDKSRC)/Defs.make
 include $(PS2SDKSRC)/ee/Rules.lib.make
 include $(PS2SDKSRC)/ee/Rules.make

ee/dma/include/dma.h

@@ -17,6 +17,7 @@
 #define __DMA_H__
 
 #include <tamtypes.h>
+#include <packet2_types.h>
 
 #define DMA_CHANNEL_VIF0     0x00
 #define DMA_CHANNEL_VIF1     0x01
@@ -50,6 +51,15 @@ void dma_wait_fast(void);
 /** Wait until the specified dma channel is ready. */
 int dma_channel_wait(int channel, int timeout);
 
+/** 
+ * Send packet2. 
+ * Type chain/normal is choosen from packet2_t. 
+ * @param packet2 Pointer to packet. 
+ * @param channel DMA channel. 
+ * @param flush_cache Should be cache flushed before send? 
+ */
+void dma_channel_send_packet2(packet2_t *packet2, int channel, u8 flush_cache);
+
 /** Send a dmachain to the specified dma channel. */
 int dma_channel_send_chain(int channel, void *data, int qwc, int flags, int spr);
 

ee/dma/src/dma.c

@@ -154,6 +154,33 @@ int dma_channel_wait(int channel, int timeout)
 
 }
 
+void dma_channel_send_packet2(packet2_t *packet2, int channel, u8 flush_cache)
+{
+	// dma_channel_send_chain does NOT flush all data that is "source chained"
+	if (packet2->mode == P2_MODE_CHAIN)
+	{
+		// "dma_channel_send_normal always flushes the data cache"
+		if (flush_cache)
+			FlushCache(0);
+		dma_channel_send_chain(
+			channel,
+			(void *)((u32)packet2->base & 0x0FFFFFFF),
+			0,
+			packet2->tte ? DMA_FLAG_TRANSFERTAG : 0,
+			0);
+	}
+	else
+	{
+		dma_channel_send_normal(
+			channel,
+			(void *)((u32)packet2->base & 0x0FFFFFFF),		// make ptr normal
+			((u32)packet2->next - (u32)packet2->base) >> 4, // length in qwords
+			0,
+			0);
+	}
+}
+
+
 int dma_channel_send_chain(int channel, void *data, int data_size, int flags, int spr)
 {
 

ee/draw/include/draw3d.h

@@ -35,6 +35,28 @@
 	((u64)GIF_REG_ST)     << 4 | \
 	((u64)GIF_REG_XYZ2)   << 8
 
+/** 
+ * Sandro: 
+ * Similar to DRAW_STQ_REGLIST, but order of ST and RGBAQ is swapped. 
+ * Needed for REGLIST mode which is used mostly in VU1, because of nature of 128bit registers. 
+ * Without that, texture perspective correction will not work. 
+ * Bad example: 
+ * 1. RGBA -> RGBAQ (q was not set!) 
+ * 2. STQ  -> ST 
+ * 3. XYZ2 
+ * Good example: 
+ * 1. STQ  -> ST 
+ * 2. RGBA -> RGBAQ (q grabbed from STQ) 
+ * 3. XYZ2 
+ * For more details, please check: 
+ * EE_Overview_Manual.pdf - 3.3 Data transfer to GS 
+ * GS_Users_Manual.pdf - 3.4.10 Perspective correction
+ */
+#define DRAW_STQ2_REGLIST \
+	((u64)GIF_REG_ST)     << 0 | \
+	((u64)GIF_REG_RGBAQ)  << 4 | \
+	((u64)GIF_REG_XYZ2)   << 8
+
 #ifdef __cplusplus
 extern "C" {
 #endif

ee/draw/samples/vu1/Makefile

@@ -0,0 +1,12 @@
+# _____     ___ ____     ___ ____
+#  ____|   |    ____|   |        | |____|
+# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
+#-----------------------------------------------------------------------
+# Copyright 2001-2004, ps2dev - http://www.ps2dev.org
+# Licenced under Academic Free License version 2.0
+# Review ps2sdk README & LICENSE files for further details.
+
+SAMPLE_DIR = draw/vu1
+
+include $(PS2SDKSRC)/Defs.make
+include $(PS2SDKSRC)/samples/Rules.samples

ee/draw/samples/vu1/Makefile.sample

@@ -0,0 +1,41 @@
+# _____     ___ ____     ___ ____
+#  ____|   |    ____|   |        | |____|
+# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
+#-----------------------------------------------------------------------
+# Copyright 2001-2004, ps2dev - http://www.ps2dev.org
+# Licenced under Academic Free License version 2.0
+# Review ps2sdk README & LICENSE files for further details.
+
+EE_BIN = vu1.elf
+EE_OBJS = micro_programs/draw_3D.o	\
+		  main.o
+EE_LIBS = -ldraw -lgraph -lmath3d -lpacket2 -ldma
+EE_DVP = dvp-as
+#EE_VCL = vcl
+
+all: zbyszek.c $(EE_BIN)
+	$(EE_STRIP) --strip-all $(EE_BIN)
+
+# Original VCL tool preferred. 
+# It can be runned on WSL, but with some tricky commands: 
+# https://github.com/microsoft/wsl/issues/2468#issuecomment-374904520
+#%.vsm: %.vcl
+#	$(EE_VCL) $< >> $@
+
+%.o: %.vsm
+	$(EE_DVP) $< -o $@
+
+zbyszek.c:
+	bin2c zbyszek.raw zbyszek.c zbyszek
+
+clean:
+	rm -f $(EE_BIN) $(EE_OBJS) zbyszek.c
+
+run: $(EE_BIN)
+	ps2client execee host:$(EE_BIN)
+
+reset:
+	ps2client reset
+
+include $(PS2SDK)/samples/Makefile.pref
+include $(PS2SDK)/samples/Makefile.eeglobal