Tegra: memctrl: check GPU reset state from common place

This patch moves the GPU reset state check, during VideoMem resize, to the
common SiP handler, to reduce code duplication.

Change-Id: I3818c5f104b809da83dc2a61d6a8149606f81c13
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/common/drivers/memctrl/memctrl_v1.c

@@ -15,9 +15,6 @@
 #include <utils.h>
 #include <xlat_tables_v2.h>
 
-#define TEGRA_GPU_RESET_REG_OFFSET	0x28c
-#define  GPU_RESET_BIT			(1 << 24)
-
 /* Video Memory base and size (live values) */
 static uint64_t video_mem_base;
 static uint64_t video_mem_size;
@@ -135,20 +132,8 @@ void tegra_memctrl_videomem_setup(uint64_t phys_base, uint32_t size_in_bytes)
 {
 	uintptr_t vmem_end_old = video_mem_base + (video_mem_size << 20);
 	uintptr_t vmem_end_new = phys_base + size_in_bytes;
-	uint32_t regval;
 	unsigned long long non_overlap_area_size;
 
-	/*
-	 * The GPU is the user of the Video Memory region. In order to
-	 * transition to the new memory region smoothly, we program the
-	 * new base/size ONLY if the GPU is in reset mode.
-	 */
-	regval = mmio_read_32(TEGRA_CAR_RESET_BASE + TEGRA_GPU_RESET_REG_OFFSET);
-	if ((regval & GPU_RESET_BIT) == 0) {
-		ERROR("GPU not in reset! Video Memory setup failed\n");
-		return;
-	}
-
 	/*
 	 * Setup the Memory controller to restrict CPU accesses to the Video
 	 * Memory region

plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c

@@ -19,9 +19,6 @@
 #include <utils.h>
 #include <xlat_tables_v2.h>
 
-#define TEGRA_GPU_RESET_REG_OFFSET	0x30
-#define  GPU_RESET_BIT			(1 << 0)
-
 /* Video Memory base and size (live values) */
 static uint64_t video_mem_base;
 static uint64_t video_mem_size_mb;
@@ -603,20 +600,8 @@ void tegra_memctrl_videomem_setup(uint64_t phys_base, uint32_t size_in_bytes)
 {
 	uintptr_t vmem_end_old = video_mem_base + (video_mem_size_mb << 20);
 	uintptr_t vmem_end_new = phys_base + size_in_bytes;
-	uint32_t regval;
 	unsigned long long non_overlap_area_size;
 
-	/*
-	 * The GPU is the user of the Video Memory region. In order to
-	 * transition to the new memory region smoothly, we program the
-	 * new base/size ONLY if the GPU is in reset mode.
-	 */
-	regval = mmio_read_32(TEGRA_CAR_RESET_BASE + TEGRA_GPU_RESET_REG_OFFSET);
-	if ((regval & GPU_RESET_BIT) == 0U) {
-		ERROR("GPU not in reset! Video Memory setup failed\n");
-		return;
-	}
-
 	/*
 	 * Setup the Memory controller to restrict CPU accesses to the Video
 	 * Memory region

plat/nvidia/tegra/common/tegra_sip_calls.c

@@ -11,6 +11,7 @@
 #include <debug.h>
 #include <errno.h>
 #include <memctrl.h>
+#include <mmio.h>
 #include <runtime_svc.h>
 #include <tegra_private.h>
 #include <tegra_platform.h>
@@ -57,6 +58,7 @@ uint64_t tegra_sip_handler(uint32_t smc_fid,
 			   void *handle,
 			   uint64_t flags)
 {
+	uint32_t regval;
 	int err;
 
 	/* Check if this is a SoC specific SiP */
@@ -87,6 +89,18 @@ uint64_t tegra_sip_handler(uint32_t smc_fid,
 			SMC_RET1(handle, -ENOTSUP);
 		}
 
+		/*
+		 * The GPU is the user of the Video Memory region. In order to
+		 * transition to the new memory region smoothly, we program the
+		 * new base/size ONLY if the GPU is in reset mode.
+		 */
+		regval = mmio_read_32(TEGRA_CAR_RESET_BASE +
+				      TEGRA_GPU_RESET_REG_OFFSET);
+		if ((regval & GPU_RESET_BIT) == 0U) {
+			ERROR("GPU not in reset! Video Memory setup failed\n");
+			SMC_RET1(handle, -ENOTSUP);
+		}
+
 		/* new video memory carveout settings */
 		tegra_memctrl_videomem_setup(x1, x2);
 

plat/nvidia/tegra/include/t132/tegra_def.h

@@ -40,6 +40,8 @@
  * Tegra Clock and Reset Controller constants
  ******************************************************************************/
 #define TEGRA_CAR_RESET_BASE		U(0x60006000)
+#define TEGRA_GPU_RESET_REG_OFFSET	U(0x28C)
+#define  GPU_RESET_BIT			(U(1) << 24)
 
 /*******************************************************************************
  * Tegra Flow Controller constants

plat/nvidia/tegra/include/t186/tegra_def.h

@@ -196,6 +196,8 @@
  * Tegra Clock and Reset Controller constants
  ******************************************************************************/
 #define TEGRA_CAR_RESET_BASE		U(0x05000000)
+#define TEGRA_GPU_RESET_REG_OFFSET	U(0x30)
+#define  GPU_RESET_BIT			(U(1) << 0)
 
 /*******************************************************************************
  * Tegra micro-seconds timer constants

plat/nvidia/tegra/include/t210/tegra_def.h

@@ -65,6 +65,8 @@
  * Tegra Clock and Reset Controller constants
  ******************************************************************************/
 #define TEGRA_CAR_RESET_BASE		U(0x60006000)
+#define TEGRA_GPU_RESET_REG_OFFSET	U(0x28C)
+#define  GPU_RESET_BIT			(U(1) << 24)
 
 /*******************************************************************************
  * Tegra Flow Controller constants