Merge "msm: kgsl: Map GPU QDSS STM through GPU IOMMU"

7 files changed, 122 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/gpu/adreno.txt b/Documentation/devicetree/bindings/gpu/adreno.txt
index ce2e38b905a1..06b8c71effcc 100644
--- a/Documentation/devicetree/bindings/gpu/adreno.txt
+++ b/Documentation/devicetree/bindings/gpu/adreno.txt
@@ -138,6 +138,11 @@ Optional Properties:
 				Specify the size of snapshot in bytes. This will override
 				snapshot size defined in the driver code.
 
+- qcom,gpu-qdss-stm:
+				<baseAddr size>
+				baseAddr - base address of the gpu channels in the qdss stm memory region
+				size     - size of the gpu stm region
+
 GPU Quirks:
 - qcom,gpu-quirk-two-pass-use-wfi:
 				Signal the GPU to set Set TWOPASSUSEWFI bit in
diff --git a/drivers/gpu/msm/adreno.c b/drivers/gpu/msm/adreno.c
index 918231b73215..3052166c7a18 100644
--- a/drivers/gpu/msm/adreno.c
+++ b/drivers/gpu/msm/adreno.c
@@ -1760,6 +1760,30 @@ static int adreno_getproperty(struct kgsl_device *device,
 			status = 0;
 		}
 		break;
+	case KGSL_PROP_DEVICE_QDSS_STM:
+		{
+			struct kgsl_qdss_stm_prop qdssprop = {0};
+			struct kgsl_memdesc *qdss_desc =
+				kgsl_mmu_get_qdss_global_entry(device);
+
+			if (sizebytes != sizeof(qdssprop)) {
+				status = -EINVAL;
+				break;
+			}
+
+			if (qdss_desc) {
+				qdssprop.gpuaddr = qdss_desc->gpuaddr;
+				qdssprop.size = qdss_desc->size;
+			}
+
+			if (copy_to_user(value, &qdssprop,
+						sizeof(qdssprop))) {
+				status = -EFAULT;
+				break;
+			}
+			status = 0;
+		}
+		break;
 	case KGSL_PROP_MMU_ENABLE:
 		{
 			/* Report MMU only if we can handle paged memory */
diff --git a/drivers/gpu/msm/adreno_compat.c b/drivers/gpu/msm/adreno_compat.c
index 582cbfb61e78..d86a0c60f0b4 100644
--- a/drivers/gpu/msm/adreno_compat.c
+++ b/drivers/gpu/msm/adreno_compat.c
@@ -89,6 +89,30 @@ int adreno_getproperty_compat(struct kgsl_device *device,
 			status = 0;
 		}
 		break;
+	case KGSL_PROP_DEVICE_QDSS_STM:
+		{
+			struct kgsl_qdss_stm_prop qdssprop = {0};
+			struct kgsl_memdesc *qdss_desc =
+				kgsl_mmu_get_qdss_global_entry(device);
+
+			if (sizebytes != sizeof(qdssprop)) {
+				status = -EINVAL;
+				break;
+			}
+
+			if (qdss_desc) {
+				qdssprop.gpuaddr = qdss_desc->gpuaddr;
+				qdssprop.size = qdss_desc->size;
+			}
+
+			if (copy_to_user(value, &qdssprop,
+						sizeof(qdssprop))) {
+				status = -EFAULT;
+				break;
+			}
+			status = 0;
+		}
+		break;
 	default:
 		/*
 		 * Call the adreno_getproperty to check if the property type
diff --git a/drivers/gpu/msm/kgsl_iommu.c b/drivers/gpu/msm/kgsl_iommu.c
index 103d290eb681..865cd9d8f498 100644
--- a/drivers/gpu/msm/kgsl_iommu.c
+++ b/drivers/gpu/msm/kgsl_iommu.c
@@ -96,6 +96,7 @@ static struct kgsl_memdesc *global_pt_entries[GLOBAL_PT_ENTRIES];
 static struct kgsl_memdesc *kgsl_global_secure_pt_entry;
 static int global_pt_count;
 uint64_t global_pt_alloc;
+static struct kgsl_memdesc gpu_qdss_desc;
 
 static void kgsl_iommu_unmap_globals(struct kgsl_pagetable *pagetable)
 {
@@ -183,6 +184,51 @@ void kgsl_add_global_secure_entry(struct kgsl_device *device,
 	kgsl_global_secure_pt_entry = memdesc;
 }
 
+struct kgsl_memdesc *kgsl_iommu_get_qdss_global_entry(void)
+{
+	return &gpu_qdss_desc;
+}
+
+static void kgsl_setup_qdss_desc(struct kgsl_device *device)
+{
+	int result = 0;
+	uint32_t gpu_qdss_entry[2];
+
+	if (!of_find_property(device->pdev->dev.of_node,
+		"qcom,gpu-qdss-stm", NULL))
+		return;
+
+	if (of_property_read_u32_array(device->pdev->dev.of_node,
+				"qcom,gpu-qdss-stm", gpu_qdss_entry, 2)) {
+		KGSL_CORE_ERR("Failed to read gpu qdss dts entry\n");
+		return;
+	}
+
+	gpu_qdss_desc.flags = 0;
+	gpu_qdss_desc.priv = 0;
+	gpu_qdss_desc.physaddr = gpu_qdss_entry[0];
+	gpu_qdss_desc.size = gpu_qdss_entry[1];
+	gpu_qdss_desc.pagetable = NULL;
+	gpu_qdss_desc.ops = NULL;
+	gpu_qdss_desc.dev = device->dev->parent;
+	gpu_qdss_desc.hostptr = NULL;
+
+	result = memdesc_sg_dma(&gpu_qdss_desc, gpu_qdss_desc.physaddr,
+			gpu_qdss_desc.size);
+	if (result) {
+		KGSL_CORE_ERR("memdesc_sg_dma failed: %d\n", result);
+		return;
+	}
+
+	kgsl_mmu_add_global(device, &gpu_qdss_desc);
+}
+
+static inline void kgsl_cleanup_qdss_desc(struct kgsl_mmu *mmu)
+{
+	kgsl_iommu_remove_global(mmu, &gpu_qdss_desc);
+	kgsl_sharedmem_free(&gpu_qdss_desc);
+}
+
 
 static inline void _iommu_sync_mmu_pc(bool lock)
 {
@@ -1265,6 +1311,7 @@ static void kgsl_iommu_close(struct kgsl_mmu *mmu)
 
 	kgsl_iommu_remove_global(mmu, &iommu->setstate);
 	kgsl_sharedmem_free(&iommu->setstate);
+	kgsl_cleanup_qdss_desc(mmu);
 }
 
 static int _setstate_alloc(struct kgsl_device *device,
@@ -1336,6 +1383,7 @@ static int kgsl_iommu_init(struct kgsl_mmu *mmu)
 	}
 
 	kgsl_iommu_add_global(mmu, &iommu->setstate);
+	kgsl_setup_qdss_desc(device);
 
 done:
 	if (status)
@@ -2341,6 +2389,7 @@ struct kgsl_mmu_ops kgsl_iommu_ops = {
 	.mmu_add_global = kgsl_iommu_add_global,
 	.mmu_remove_global = kgsl_iommu_remove_global,
 	.mmu_getpagetable = kgsl_iommu_getpagetable,
+	.mmu_get_qdss_global_entry = kgsl_iommu_get_qdss_global_entry,
 	.probe = kgsl_iommu_probe,
 };
 
diff --git a/drivers/gpu/msm/kgsl_mmu.c b/drivers/gpu/msm/kgsl_mmu.c
index f8315090ff06..8b0d93fda32c 100644
--- a/drivers/gpu/msm/kgsl_mmu.c
+++ b/drivers/gpu/msm/kgsl_mmu.c
@@ -546,6 +546,17 @@ bool kgsl_mmu_gpuaddr_in_range(struct kgsl_pagetable *pagetable,
 }
 EXPORT_SYMBOL(kgsl_mmu_gpuaddr_in_range);
 
+struct kgsl_memdesc *kgsl_mmu_get_qdss_global_entry(struct kgsl_device *device)
+{
+	struct kgsl_mmu *mmu = &device->mmu;
+
+	if (MMU_OP_VALID(mmu, mmu_get_qdss_global_entry))
+		return mmu->mmu_ops->mmu_get_qdss_global_entry();
+
+	return NULL;
+}
+EXPORT_SYMBOL(kgsl_mmu_get_qdss_global_entry);
+
 /*
  * NOMMU defintions - NOMMU really just means that the MMU is kept in pass
  * through and the GPU directly accesses physical memory. Used in debug mode and
diff --git a/drivers/gpu/msm/kgsl_mmu.h b/drivers/gpu/msm/kgsl_mmu.h
index 5339917911b1..588777af353f 100644
--- a/drivers/gpu/msm/kgsl_mmu.h
+++ b/drivers/gpu/msm/kgsl_mmu.h
@@ -80,6 +80,7 @@ struct kgsl_mmu_ops {
 			struct kgsl_memdesc *memdesc);
 	struct kgsl_pagetable * (*mmu_getpagetable)(struct kgsl_mmu *mmu,
 			unsigned long name);
+	struct kgsl_memdesc* (*mmu_get_qdss_global_entry)(void);
 };
 
 struct kgsl_mmu_pt_ops {
@@ -227,6 +228,8 @@ int kgsl_mmu_unmap_offset(struct kgsl_pagetable *pagetable,
 		struct kgsl_memdesc *memdesc, uint64_t addr, uint64_t offset,
 		uint64_t size);
 
+struct kgsl_memdesc *kgsl_mmu_get_qdss_global_entry(struct kgsl_device *device);
+
 /*
  * Static inline functions of MMU that simply call the SMMU specific
  * function using a function pointer. These functions can be thought
diff --git a/include/uapi/linux/msm_kgsl.h b/include/uapi/linux/msm_kgsl.h
index dbba773cd49d..a80278954a77 100644
--- a/include/uapi/linux/msm_kgsl.h
+++ b/include/uapi/linux/msm_kgsl.h
@@ -308,6 +308,7 @@ enum kgsl_timestamp_type {
 #define KGSL_PROP_GPMU_VERSION		0x16
 #define KGSL_PROP_HIGHEST_BANK_BIT	0x17
 #define KGSL_PROP_DEVICE_BITNESS	0x18
+#define KGSL_PROP_DEVICE_QDSS_STM	0x19
 
 struct kgsl_shadowprop {
 	unsigned long gpuaddr;
@@ -315,6 +316,11 @@ struct kgsl_shadowprop {
 	unsigned int flags; /* contains KGSL_FLAGS_ values */
 };
 
+struct kgsl_qdss_stm_prop {
+	uint64_t gpuaddr;
+	uint64_t size;
+};
+
 struct kgsl_version {
 	unsigned int drv_major;
 	unsigned int drv_minor;