msm: kgsl: Add sparse memory support

Add support to allocate/reserve a virtual address range without
physically backing. Add support to allocate physically backing memory
without assigning it a virtual address. Add support to unite
the two forementioned allocations together. Add support to
divorce them from one another. Add support to let their kids
do cache operations as they see fit.

Create a 'dummy' page that is used to back virtual allocations
that are not yet backed by physical memory.

CRs-Fixed: 1046456
Change-Id: Ifaa687b036eeab22ab4cf0238abdfbe7b2311ed3
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>

1 files changed, 99 insertions, 0 deletions

diff --git a/include/uapi/linux/msm_kgsl.h b/include/uapi/linux/msm_kgsl.h
index a80278954a77..aac11dbe5984 100644
--- a/include/uapi/linux/msm_kgsl.h
+++ b/include/uapi/linux/msm_kgsl.h
@@ -121,6 +121,11 @@
 #define KGSL_MEMFLAGS_GPUWRITEONLY 0x02000000U
 #define KGSL_MEMFLAGS_FORCE_32BIT 0x100000000ULL
 
+/* Flag for binding all the virt range to single phys data */
+#define KGSL_SPARSE_BIND_MULTIPLE_TO_PHYS 0x400000000ULL
+#define KGSL_SPARSE_BIND 0x1ULL
+#define KGSL_SPARSE_UNBIND 0x2ULL
+
 /* Memory caching hints */
 #define KGSL_CACHEMODE_MASK       0x0C000000U
 #define KGSL_CACHEMODE_SHIFT 26
@@ -131,6 +136,8 @@
 #define KGSL_CACHEMODE_WRITEBACK 3
 
 #define KGSL_MEMFLAGS_USE_CPU_MAP 0x10000000ULL
+#define KGSL_MEMFLAGS_SPARSE_PHYS 0x20000000ULL
+#define KGSL_MEMFLAGS_SPARSE_VIRT 0x40000000ULL
 
 /* Memory types for which allocations are made */
 #define KGSL_MEMTYPE_MASK		0x0000FF00
@@ -1457,4 +1464,96 @@ struct kgsl_gpuobj_set_info {
 #define IOCTL_KGSL_GPUOBJ_SET_INFO \
 	_IOW(KGSL_IOC_TYPE, 0x4C, struct kgsl_gpuobj_set_info)
 
+/**
+ * struct kgsl_sparse_phys_alloc - Argument for IOCTL_KGSL_SPARSE_PHYS_ALLOC
+ * @size: Size in bytes to back
+ * @pagesize: Pagesize alignment required
+ * @flags: Flags for this allocation
+ * @id: Returned ID for this allocation
+ */
+struct kgsl_sparse_phys_alloc {
+	uint64_t size;
+	uint64_t pagesize;
+	uint64_t flags;
+	unsigned int id;
+};
+
+#define IOCTL_KGSL_SPARSE_PHYS_ALLOC \
+	_IOWR(KGSL_IOC_TYPE, 0x50, struct kgsl_sparse_phys_alloc)
+
+/**
+ * struct kgsl_sparse_phys_free - Argument for IOCTL_KGSL_SPARSE_PHYS_FREE
+ * @id: ID to free
+ */
+struct kgsl_sparse_phys_free {
+	unsigned int id;
+};
+
+#define IOCTL_KGSL_SPARSE_PHYS_FREE \
+	_IOW(KGSL_IOC_TYPE, 0x51, struct kgsl_sparse_phys_free)
+
+/**
+ * struct kgsl_sparse_virt_alloc - Argument for IOCTL_KGSL_SPARSE_VIRT_ALLOC
+ * @size: Size in bytes to reserve
+ * @pagesize: Pagesize alignment required
+ * @flags: Flags for this allocation
+ * @id: Returned ID for this allocation
+ * @gpuaddr: Returned GPU address for this allocation
+ */
+struct kgsl_sparse_virt_alloc {
+	uint64_t size;
+	uint64_t pagesize;
+	uint64_t flags;
+	uint64_t gpuaddr;
+	unsigned int id;
+};
+
+#define IOCTL_KGSL_SPARSE_VIRT_ALLOC \
+	_IOWR(KGSL_IOC_TYPE, 0x52, struct kgsl_sparse_virt_alloc)
+
+/**
+ * struct kgsl_sparse_virt_free - Argument for IOCTL_KGSL_SPARSE_VIRT_FREE
+ * @id: ID to free
+ */
+struct kgsl_sparse_virt_free {
+	unsigned int id;
+};
+
+#define IOCTL_KGSL_SPARSE_VIRT_FREE \
+	_IOW(KGSL_IOC_TYPE, 0x53, struct kgsl_sparse_virt_free)
+
+/**
+ * struct kgsl_sparse_binding_object - Argument for kgsl_sparse_bind
+ * @virtoffset: Offset into the virtual ID
+ * @physoffset: Offset into the physical ID (bind only)
+ * @size: Size in bytes to reserve
+ * @flags: Flags for this kgsl_sparse_binding_object
+ * @id: Physical ID to bind (bind only)
+ */
+struct kgsl_sparse_binding_object {
+	uint64_t virtoffset;
+	uint64_t physoffset;
+	uint64_t size;
+	uint64_t flags;
+	unsigned int id;
+};
+
+/**
+ * struct kgsl_sparse_bind - Argument for IOCTL_KGSL_SPARSE_BIND
+ * @list: List of kgsl_sparse_bind_objects to bind/unbind
+ * @id: Virtual ID to bind/unbind
+ * @size: Size of kgsl_sparse_bind_object
+ * @count: Number of elements in list
+ *
+ */
+struct kgsl_sparse_bind {
+	uint64_t __user list;
+	unsigned int id;
+	unsigned int size;
+	unsigned int count;
+};
+
+#define IOCTL_KGSL_SPARSE_BIND \
+	_IOW(KGSL_IOC_TYPE, 0x54, struct kgsl_sparse_bind)
+
 #endif /* _UAPI_MSM_KGSL_H */