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GPU: Implemented nvhost-as-gpu's UnmapBuffer ioctl.
It removes a mapping previously created with the MapBufferEx ioctl.
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1b5c02fc37
commit
72b5c448cf
4 changed files with 70 additions and 0 deletions
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@ -26,6 +26,8 @@ u32 nvhost_as_gpu::ioctl(Ioctl command, const std::vector<u8>& input, std::vecto
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return BindChannel(input, output);
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case IoctlCommand::IocGetVaRegionsCommand:
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return GetVARegions(input, output);
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case IoctlCommand::IocUnmapBufferCommand:
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return UnmapBuffer(input, output);
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}
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if (static_cast<IoctlCommand>(command.cmd.Value()) == IoctlCommand::IocRemapCommand)
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@ -125,6 +127,37 @@ u32 nvhost_as_gpu::MapBufferEx(const std::vector<u8>& input, std::vector<u8>& ou
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params.offset = gpu.memory_manager->MapBufferEx(object->addr, object->size);
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}
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// Create a new mapping entry for this operation.
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ASSERT_MSG(buffer_mappings.find(params.offset) == buffer_mappings.end(),
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"Offset is already mapped");
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BufferMapping mapping{};
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mapping.nvmap_handle = params.nvmap_handle;
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mapping.offset = params.offset;
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mapping.size = object->size;
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buffer_mappings[params.offset] = mapping;
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std::memcpy(output.data(), ¶ms, output.size());
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return 0;
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}
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u32 nvhost_as_gpu::UnmapBuffer(const std::vector<u8>& input, std::vector<u8>& output) {
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IoctlUnmapBuffer params{};
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std::memcpy(¶ms, input.data(), input.size());
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NGLOG_DEBUG(Service_NVDRV, "called, offset=0x{:X}", params.offset);
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auto& gpu = Core::System::GetInstance().GPU();
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auto itr = buffer_mappings.find(params.offset);
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ASSERT_MSG(itr != buffer_mappings.end(), "Tried to unmap invalid mapping");
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params.offset = gpu.memory_manager->UnmapBuffer(params.offset, itr->second.size);
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buffer_mappings.erase(itr->second.offset);
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std::memcpy(output.data(), ¶ms, output.size());
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return 0;
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}
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@ -5,6 +5,7 @@
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#pragma once
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#include <memory>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include "common/common_types.h"
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@ -30,6 +31,7 @@ private:
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IocMapBufferExCommand = 0xC0284106,
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IocBindChannelCommand = 0x40044101,
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IocGetVaRegionsCommand = 0xC0404108,
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IocUnmapBufferCommand = 0xC0084105,
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};
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struct IoctlInitalizeEx {
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@ -76,6 +78,11 @@ private:
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};
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static_assert(sizeof(IoctlMapBufferEx) == 40, "IoctlMapBufferEx is incorrect size");
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struct IoctlUnmapBuffer {
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u64_le offset;
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};
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static_assert(sizeof(IoctlUnmapBuffer) == 8, "IoctlUnmapBuffer is incorrect size");
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struct IoctlBindChannel {
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u32_le fd;
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};
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@ -98,12 +105,22 @@ private:
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static_assert(sizeof(IoctlGetVaRegions) == 16 + sizeof(IoctlVaRegion) * 2,
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"IoctlGetVaRegions is incorrect size");
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struct BufferMapping {
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u64 offset;
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u64 size;
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u32 nvmap_handle;
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};
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/// Map containing the nvmap object mappings in GPU memory.
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std::unordered_map<u64, BufferMapping> buffer_mappings;
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u32 channel{};
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u32 InitalizeEx(const std::vector<u8>& input, std::vector<u8>& output);
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u32 AllocateSpace(const std::vector<u8>& input, std::vector<u8>& output);
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u32 Remap(const std::vector<u8>& input, std::vector<u8>& output);
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u32 MapBufferEx(const std::vector<u8>& input, std::vector<u8>& output);
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u32 UnmapBuffer(const std::vector<u8>& input, std::vector<u8>& output);
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u32 BindChannel(const std::vector<u8>& input, std::vector<u8>& output);
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u32 GetVARegions(const std::vector<u8>& input, std::vector<u8>& output);
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@ -58,6 +58,25 @@ GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size)
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return gpu_addr;
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}
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GPUVAddr MemoryManager::UnmapBuffer(GPUVAddr gpu_addr, u64 size) {
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ASSERT((gpu_addr & PAGE_MASK) == 0);
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for (u64 offset = 0; offset < size; offset += PAGE_SIZE) {
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ASSERT(PageSlot(gpu_addr + offset) != static_cast<u64>(PageStatus::Allocated) &&
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PageSlot(gpu_addr + offset) != static_cast<u64>(PageStatus::Unmapped));
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PageSlot(gpu_addr + offset) = static_cast<u64>(PageStatus::Unmapped);
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}
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// Delete the region mappings that are contained within the unmapped region
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mapped_regions.erase(std::remove_if(mapped_regions.begin(), mapped_regions.end(),
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[&](const MappedRegion& region) {
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return region.gpu_addr <= gpu_addr &&
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region.gpu_addr + region.size < gpu_addr + size;
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}),
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mapped_regions.end());
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return gpu_addr;
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}
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boost::optional<GPUVAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) {
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GPUVAddr gpu_addr = 0;
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u64 free_space = 0;
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@ -25,6 +25,7 @@ public:
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GPUVAddr AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align);
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GPUVAddr MapBufferEx(VAddr cpu_addr, u64 size);
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GPUVAddr MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size);
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GPUVAddr UnmapBuffer(GPUVAddr gpu_addr, u64 size);
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boost::optional<VAddr> GpuToCpuAddress(GPUVAddr gpu_addr);
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std::vector<GPUVAddr> CpuToGpuAddress(VAddr cpu_addr) const;
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