From 72b5c448cfe5d21fea9dd7a996ca8b50539ec64a Mon Sep 17 00:00:00 2001 From: Subv Date: Sun, 20 May 2018 14:21:06 -0500 Subject: GPU: Implemented nvhost-as-gpu's UnmapBuffer ioctl. It removes a mapping previously created with the MapBufferEx ioctl. --- src/video_core/memory_manager.cpp | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'src/video_core/memory_manager.cpp') diff --git a/src/video_core/memory_manager.cpp b/src/video_core/memory_manager.cpp index 25984439d..5cefce9fc 100644 --- a/src/video_core/memory_manager.cpp +++ b/src/video_core/memory_manager.cpp @@ -58,6 +58,25 @@ GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size) return gpu_addr; } +GPUVAddr MemoryManager::UnmapBuffer(GPUVAddr gpu_addr, u64 size) { + ASSERT((gpu_addr & PAGE_MASK) == 0); + + for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { + ASSERT(PageSlot(gpu_addr + offset) != static_cast(PageStatus::Allocated) && + PageSlot(gpu_addr + offset) != static_cast(PageStatus::Unmapped)); + PageSlot(gpu_addr + offset) = static_cast(PageStatus::Unmapped); + } + + // Delete the region mappings that are contained within the unmapped region + mapped_regions.erase(std::remove_if(mapped_regions.begin(), mapped_regions.end(), + [&](const MappedRegion& region) { + return region.gpu_addr <= gpu_addr && + region.gpu_addr + region.size < gpu_addr + size; + }), + mapped_regions.end()); + return gpu_addr; +} + boost::optional MemoryManager::FindFreeBlock(u64 size, u64 align) { GPUVAddr gpu_addr = 0; u64 free_space = 0; -- cgit v1.2.3