From b03e0caf5e153551cb71065ffaa4361b7f7e492b Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sat, 25 Jun 2011 01:49:35 +0300
Subject: [PATCH] gpus: return DMA word count to avoid 1 list walk

---
 libpcsxcore/psxdma.c     | 5 +++--
 plugins/dfxvideo/gpu.c   | 4 +++-
 plugins/gpu_unai/gpu.cpp | 6 +++++-
 plugins/gpu_unai/port.h  | 2 +-
 4 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/libpcsxcore/psxdma.c b/libpcsxcore/psxdma.c
index 1274d930..df79b6d3 100644
--- a/libpcsxcore/psxdma.c
+++ b/libpcsxcore/psxdma.c
@@ -167,8 +167,9 @@ void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
 			PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
 #endif
 
-			size = gpuDmaChainSize(madr);
-			GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
+			size = GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
+			if ((int)size <= 0)
+				size = gpuDmaChainSize(madr);
 			
 			// Tekken 3 = use 1.0 only (not 1.5x)
 
diff --git a/plugins/dfxvideo/gpu.c b/plugins/dfxvideo/gpu.c
index 9a614de2..0d105f89 100644
--- a/plugins/dfxvideo/gpu.c
+++ b/plugins/dfxvideo/gpu.c
@@ -1042,6 +1042,7 @@ long CALLBACK GPUdmaChain(uint32_t * baseAddrL, uint32_t addr)
  uint32_t dmaMem;
  unsigned char * baseAddrB;
  short count;unsigned int DMACommandCounter = 0;
+ long dmaWords = 0;
 
  GPUIsBusy;
 
@@ -1056,6 +1057,7 @@ long CALLBACK GPUdmaChain(uint32_t * baseAddrL, uint32_t addr)
    if(CheckForEndlessLoop(addr)) break;
 
    count = baseAddrB[addr+3];
+   dmaWords += 1 + count;
 
    dmaMem=addr+4;
 
@@ -1067,7 +1069,7 @@ long CALLBACK GPUdmaChain(uint32_t * baseAddrL, uint32_t addr)
 
  GPUIsIdle;
 
- return 0;
+ return dmaWords;
 }
 
 ////////////////////////////////////////////////////////////////////////
diff --git a/plugins/gpu_unai/gpu.cpp b/plugins/gpu_unai/gpu.cpp
index 808c8916..9b0a0dc4 100644
--- a/plugins/gpu_unai/gpu.cpp
+++ b/plugins/gpu_unai/gpu.cpp
@@ -331,7 +331,7 @@ INLINE int CheckForEndlessLoop(u32 *laddr)
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-void  GPU_dmaChain(u32* baseAddr, u32 dmaVAddr)
+long GPU_dmaChain(u32* baseAddr, u32 dmaVAddr)
 {
 #ifdef DEBUG_ANALYSIS
 	dbg_anacnt_GPU_dmaChain++;
@@ -339,6 +339,7 @@ void  GPU_dmaChain(u32* baseAddr, u32 dmaVAddr)
 	pcsx4all_prof_start_with_pause(PCSX4ALL_PROF_GPU,PCSX4ALL_PROF_HW_WRITE);
 	u32 data, *address, count, offset;
 	unsigned int DMACommandCounter = 0;
+	long dma_words = 0;
 
 	GPU_GP1 &= ~0x14000000;
 	lUsedAddr[0]=lUsedAddr[1]=lUsedAddr[2]=(u32*)0x1fffff;
@@ -355,9 +356,12 @@ void  GPU_dmaChain(u32* baseAddr, u32 dmaVAddr)
 		else dmaVAddr = 0x1FFFFF;
 
 		if(count>0) GPU_writeDataMem(address,count);
+		dma_words += 1 + count;
 	}
 	GPU_GP1 = (GPU_GP1 | 0x14000000) & ~0x60000000;
 	pcsx4all_prof_end_with_resume(PCSX4ALL_PROF_GPU,PCSX4ALL_PROF_HW_WRITE);
+
+	return dma_words;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/plugins/gpu_unai/port.h b/plugins/gpu_unai/port.h
index 3561acdc..238b98bc 100644
--- a/plugins/gpu_unai/port.h
+++ b/plugins/gpu_unai/port.h
@@ -23,7 +23,7 @@ extern "C" {
 bool GPUinit(void);
 void GPUshutdown(void);
 void GPUwriteDataMem(u32* dmaAddress, s32 dmaCount);
-void GPUdmaChain(u32* baseAddr, u32 dmaVAddr);
+long GPUdmaChain(u32* baseAddr, u32 dmaVAddr);
 void GPUwriteData(u32 data);
 void GPUreadDataMem(u32* dmaAddress, s32 dmaCount);
 u32  GPUreadData(void);
-- 
2.39.2