arm: tegra: smmu: Remove IORESOURCE use from SMMU IOVA range

SMMU simply needs to know its assigned IOVA range, but does not need
address space resources.
Bug 874438

Change-Id: I96a8718e692bbb96b5fce6ec7ebc90f6930f358c
Reviewed-on: http://git-master/r/52670
Tested-by: Hiro Sugawara <hsugawara@nvidia.com>
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-by: Scott Williams <scwilliams@nvidia.com>

4 files changed, 52 insertions, 15 deletions

diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index 1e911a3c80b8..694d598d8b36 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -45,6 +45,9 @@
 #include "fuse.h"
 #include "power.h"
 #include "reset.h"
+#ifdef CONFIG_TEGRA_IOVMM_SMMU
+#include "tegra_smmu.h"
+#endif
 
 #define MC_SECURITY_CFG2	0x7c
 
@@ -690,11 +693,8 @@ void __init tegra_reserve(unsigned long carveout_size, unsigned long fb_size,
 	unsigned long fb2_size)
 {
 #ifdef SUPPORT_TEGRA_3_IOVMM_SMMU_A01
-	extern struct platform_device tegra_smmu_device;
 	int smmu_reserved = 0;
-	struct resource *smmu_window =
-		    platform_get_resource_byname(&tegra_smmu_device,
-						IORESOURCE_MEM, "smmu");
+	struct tegra_smmu_window *smmu_window = tegra_smmu_window(0);
 #endif
 
 	if (carveout_size) {
@@ -744,7 +744,7 @@ void __init tegra_reserve(unsigned long carveout_size, unsigned long fb_size,
 
 #ifdef SUPPORT_TEGRA_3_IOVMM_SMMU_A01
 	if (!smmu_window) {
-		pr_err("No SMMU resources\n");
+		pr_err("No SMMU resource\n");
 	} else {
 		size_t smmu_window_size;
 
@@ -819,7 +819,7 @@ void __init tegra_reserve(unsigned long carveout_size, unsigned long fb_size,
 
 #ifdef SUPPORT_TEGRA_3_IOVMM_SMMU_A01
 	if (smmu_reserved)
-		pr_info("SMMU:                   %08x - %08x\n",
+		pr_info("SMMU:                   %08lx - %08lx\n",
 			smmu_window->start, smmu_window->end);
 #endif
 }
diff --git a/arch/arm/mach-tegra/devices.c b/arch/arm/mach-tegra/devices.c
index d3865628e610..2c8f07ef9bec 100644
--- a/arch/arm/mach-tegra/devices.c
+++ b/arch/arm/mach-tegra/devices.c
@@ -836,12 +836,6 @@ static struct resource tegra_smmu_resources[] = {
 		.end	= TEGRA_MC_BASE + TEGRA_MC_SIZE - 1,
 	},
 	[1] = {
-		.name	= "smmu",
-		.flags	= IORESOURCE_MEM,
-		.start	= TEGRA_SMMU_BASE,
-		.end	= TEGRA_SMMU_BASE + TEGRA_SMMU_SIZE - 1,
-	},
-	[2] = {
 		.name   = "ahbarb",
 		.flags  = IORESOURCE_MEM,
 		.start  = TEGRA_AHB_ARB_BASE,
@@ -855,6 +849,26 @@ struct platform_device tegra_smmu_device = {
 	.num_resources	= ARRAY_SIZE(tegra_smmu_resources),
 	.resource	= tegra_smmu_resources
 };
+
+
+#include "tegra_smmu.h"
+
+static struct tegra_smmu_window tegra_smmu[] = {
+	[0] = {
+		.start	= TEGRA_SMMU_BASE,
+		.end	= TEGRA_SMMU_BASE + TEGRA_SMMU_SIZE - 1,
+	},
+};
+
+struct tegra_smmu_window *tegra_smmu_window(int wnum)
+{
+	return &tegra_smmu[wnum];
+}
+
+int tegra_smmu_window_count(void)
+{
+	return ARRAY_SIZE(tegra_smmu);
+}
 #endif
 
 static struct resource pmu_resources[] = {
diff --git a/arch/arm/mach-tegra/iovmm-smmu.c b/arch/arm/mach-tegra/iovmm-smmu.c
index f5053b04315d..97a61f0fed34 100644
--- a/arch/arm/mach-tegra/iovmm-smmu.c
+++ b/arch/arm/mach-tegra/iovmm-smmu.c
@@ -34,7 +34,7 @@
 #include <asm/cacheflush.h>
 #include <asm/page.h>
 #include <asm/cacheflush.h>
-
+#include "tegra_smmu.h"
 #include <mach/iovmm.h>
 #include <mach/iomap.h>
 
@@ -923,7 +923,8 @@ static struct tegra_iovmm_device_ops tegra_iovmm_smmu_ops = {
 static int smmu_probe(struct platform_device *pdev)
 {
 	struct smmu_device *smmu = NULL;
-	struct resource *regs = NULL, *window = NULL, *regs2 = NULL;
+	struct resource *regs = NULL, *regs2 = NULL;
+	struct tegra_smmu_window *window = NULL;
 	int e, asid;
 
 	if (!pdev) {
@@ -944,7 +945,7 @@ static int smmu_probe(struct platform_device *pdev)
 
 	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mc");
 	regs2 = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ahbarb");
-	window = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smmu");
+	window = tegra_smmu_window(0);
 
 	if (!regs || !regs2 || !window) {
 		pr_err(DRIVER_NAME ": No SMMU resources\n");
diff --git a/arch/arm/mach-tegra/tegra_smmu.h b/arch/arm/mach-tegra/tegra_smmu.h
new file mode 100644
index 000000000000..aba140e0f2d0
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra_smmu.h
@@ -0,0 +1,22 @@
+/*
+ * arch/arm/mach-tegra/tegra_smmu.h
+ *
+ * Copyright (C) 2011 NVIDIA Corporation.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+struct tegra_smmu_window {
+	unsigned long start;
+	unsigned long end;
+};
+
+extern struct tegra_smmu_window *tegra_smmu_window(int wnum);
+extern int tegra_smmu_window_count(void);