msm: kgsl: Map GPU QTimer through GPU IOMMU
Map the GPU QTimer area as a global into the GPU
IOMMU so that the GPU can access the QTimer.
Change-Id: If50bd36681123adde7e3a37644c41316f101154c
Signed-off-by: Jonathan Wicks <jwicks@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/gpu/adreno.txt b/Documentation/devicetree/bindings/gpu/adreno.txt
index b6544961..f4b6013 100644
--- a/Documentation/devicetree/bindings/gpu/adreno.txt
+++ b/Documentation/devicetree/bindings/gpu/adreno.txt
@@ -152,6 +152,11 @@
baseAddr - base address of the gpu channels in the qdss stm memory region
size - size of the gpu stm region
+- qcom,gpu-qtimer:
+ <baseAddr size>
+ baseAddr - base address of the qtimer memory region
+ size - size of the qtimer region
+
- qcom,tsens-name:
Specify the name of GPU temperature sensor. This name will be used
to get the temperature from the thermal driver API.
diff --git a/drivers/gpu/msm/adreno.c b/drivers/gpu/msm/adreno.c
index f0d8746..1c37978 100644
--- a/drivers/gpu/msm/adreno.c
+++ b/drivers/gpu/msm/adreno.c
@@ -1854,6 +1854,30 @@
status = 0;
}
break;
+ case KGSL_PROP_DEVICE_QTIMER:
+ {
+ struct kgsl_qtimer_prop qtimerprop = {0};
+ struct kgsl_memdesc *qtimer_desc =
+ kgsl_mmu_get_qtimer_global_entry(device);
+
+ if (sizebytes != sizeof(qtimerprop)) {
+ status = -EINVAL;
+ break;
+ }
+
+ if (qtimer_desc) {
+ qtimerprop.gpuaddr = qtimer_desc->gpuaddr;
+ qtimerprop.size = qtimer_desc->size;
+ }
+
+ if (copy_to_user(value, &qtimerprop,
+ sizeof(qtimerprop))) {
+ 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 d86a0c6..5a8d587 100644
--- a/drivers/gpu/msm/adreno_compat.c
+++ b/drivers/gpu/msm/adreno_compat.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -113,6 +113,30 @@
status = 0;
}
break;
+ case KGSL_PROP_DEVICE_QTIMER:
+ {
+ struct kgsl_qtimer_prop qtimerprop = {0};
+ struct kgsl_memdesc *qtimer_desc =
+ kgsl_mmu_get_qtimer_global_entry(device);
+
+ if (sizebytes != sizeof(qtimerprop)) {
+ status = -EINVAL;
+ break;
+ }
+
+ if (qtimer_desc) {
+ qtimerprop.gpuaddr = qtimer_desc->gpuaddr;
+ qtimerprop.size = qtimer_desc->size;
+ }
+
+ if (copy_to_user(value, &qtimerprop,
+ sizeof(qtimerprop))) {
+ 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 cfd5cd1..0325db8 100644
--- a/drivers/gpu/msm/kgsl_iommu.c
+++ b/drivers/gpu/msm/kgsl_iommu.c
@@ -113,6 +113,7 @@
static int global_pt_count;
uint64_t global_pt_alloc;
static struct kgsl_memdesc gpu_qdss_desc;
+static struct kgsl_memdesc gpu_qtimer_desc;
void kgsl_print_global_pt_entries(struct seq_file *s)
{
@@ -272,6 +273,50 @@
kgsl_sharedmem_free(&gpu_qdss_desc);
}
+struct kgsl_memdesc *kgsl_iommu_get_qtimer_global_entry(void)
+{
+ return &gpu_qtimer_desc;
+}
+
+static void kgsl_setup_qtimer_desc(struct kgsl_device *device)
+{
+ int result = 0;
+ uint32_t gpu_qtimer_entry[2];
+
+ if (!of_find_property(device->pdev->dev.of_node,
+ "qcom,gpu-qtimer", NULL))
+ return;
+
+ if (of_property_read_u32_array(device->pdev->dev.of_node,
+ "qcom,gpu-qtimer", gpu_qtimer_entry, 2)) {
+ KGSL_CORE_ERR("Failed to read gpu qtimer dts entry\n");
+ return;
+ }
+
+ gpu_qtimer_desc.flags = 0;
+ gpu_qtimer_desc.priv = 0;
+ gpu_qtimer_desc.physaddr = gpu_qtimer_entry[0];
+ gpu_qtimer_desc.size = gpu_qtimer_entry[1];
+ gpu_qtimer_desc.pagetable = NULL;
+ gpu_qtimer_desc.ops = NULL;
+ gpu_qtimer_desc.dev = device->dev->parent;
+ gpu_qtimer_desc.hostptr = NULL;
+
+ result = memdesc_sg_dma(&gpu_qtimer_desc, gpu_qtimer_desc.physaddr,
+ gpu_qtimer_desc.size);
+ if (result) {
+ KGSL_CORE_ERR("memdesc_sg_dma failed: %d\n", result);
+ return;
+ }
+
+ kgsl_mmu_add_global(device, &gpu_qtimer_desc, "gpu-qtimer");
+}
+
+static inline void kgsl_cleanup_qtimer_desc(struct kgsl_mmu *mmu)
+{
+ kgsl_iommu_remove_global(mmu, &gpu_qtimer_desc);
+ kgsl_sharedmem_free(&gpu_qtimer_desc);
+}
static inline void _iommu_sync_mmu_pc(bool lock)
{
@@ -1452,6 +1497,7 @@
kgsl_iommu_remove_global(mmu, &iommu->setstate);
kgsl_sharedmem_free(&iommu->setstate);
kgsl_cleanup_qdss_desc(mmu);
+ kgsl_cleanup_qtimer_desc(mmu);
}
static int _setstate_alloc(struct kgsl_device *device,
@@ -1523,6 +1569,7 @@
kgsl_iommu_add_global(mmu, &iommu->setstate, "setstate");
kgsl_setup_qdss_desc(device);
+ kgsl_setup_qtimer_desc(device);
done:
if (status)
@@ -2671,6 +2718,7 @@
.mmu_remove_global = kgsl_iommu_remove_global,
.mmu_getpagetable = kgsl_iommu_getpagetable,
.mmu_get_qdss_global_entry = kgsl_iommu_get_qdss_global_entry,
+ .mmu_get_qtimer_global_entry = kgsl_iommu_get_qtimer_global_entry,
.probe = kgsl_iommu_probe,
};
diff --git a/drivers/gpu/msm/kgsl_mmu.c b/drivers/gpu/msm/kgsl_mmu.c
index 9e516e1..8ea4492 100644
--- a/drivers/gpu/msm/kgsl_mmu.c
+++ b/drivers/gpu/msm/kgsl_mmu.c
@@ -617,6 +617,18 @@
}
EXPORT_SYMBOL(kgsl_mmu_get_qdss_global_entry);
+struct kgsl_memdesc *kgsl_mmu_get_qtimer_global_entry(
+ struct kgsl_device *device)
+{
+ struct kgsl_mmu *mmu = &device->mmu;
+
+ if (MMU_OP_VALID(mmu, mmu_get_qtimer_global_entry))
+ return mmu->mmu_ops->mmu_get_qtimer_global_entry();
+
+ return NULL;
+}
+EXPORT_SYMBOL(kgsl_mmu_get_qtimer_global_entry);
+
/*
* NOMMU definitions - NOMMU really just means that the MMU is kept in pass
* through and the GPU directly accesses physical memory. Used in debug mode
diff --git a/drivers/gpu/msm/kgsl_mmu.h b/drivers/gpu/msm/kgsl_mmu.h
index 0f9f486..56bb317 100644
--- a/drivers/gpu/msm/kgsl_mmu.h
+++ b/drivers/gpu/msm/kgsl_mmu.h
@@ -83,6 +83,7 @@
struct kgsl_pagetable * (*mmu_getpagetable)(struct kgsl_mmu *mmu,
unsigned long name);
struct kgsl_memdesc* (*mmu_get_qdss_global_entry)(void);
+ struct kgsl_memdesc* (*mmu_get_qtimer_global_entry)(void);
};
struct kgsl_mmu_pt_ops {
@@ -233,6 +234,9 @@
struct kgsl_memdesc *kgsl_mmu_get_qdss_global_entry(struct kgsl_device *device);
+struct kgsl_memdesc *kgsl_mmu_get_qtimer_global_entry(
+ struct kgsl_device *device);
+
int kgsl_mmu_sparse_dummy_map(struct kgsl_pagetable *pagetable,
struct kgsl_memdesc *memdesc, uint64_t offset, uint64_t size);
diff --git a/include/uapi/linux/msm_kgsl.h b/include/uapi/linux/msm_kgsl.h
index 941a816..c190446 100644
--- a/include/uapi/linux/msm_kgsl.h
+++ b/include/uapi/linux/msm_kgsl.h
@@ -327,6 +327,7 @@
#define KGSL_PROP_DEVICE_QDSS_STM 0x19
#define KGSL_PROP_MIN_ACCESS_LENGTH 0x1A
#define KGSL_PROP_UBWC_MODE 0x1B
+#define KGSL_PROP_DEVICE_QTIMER 0x20
struct kgsl_shadowprop {
unsigned long gpuaddr;
@@ -339,6 +340,11 @@
uint64_t size;
};
+struct kgsl_qtimer_prop {
+ uint64_t gpuaddr;
+ uint64_t size;
+};
+
struct kgsl_version {
unsigned int drv_major;
unsigned int drv_minor;