address_space: Address feedback
This commit is contained in:
Morph
Fernando Sahmkow
parent
fedd983f96
commit
fa342cae22
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@ -23,9 +23,29 @@ template <typename VaType, VaType UnmappedVa, typename PaType, PaType UnmappedPa
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bool PaContigSplit, size_t AddressSpaceBits, typename ExtraBlockInfo = EmptyStruct>
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requires AddressSpaceValid<VaType, AddressSpaceBits>
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class FlatAddressSpaceMap {
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private:
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std::function<void(VaType, VaType)>
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unmapCallback{}; //!< Callback called when the mappings in an region have changed
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public:
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/// The maximum VA that this AS can technically reach
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static constexpr VaType VaMaximum{(1ULL << (AddressSpaceBits - 1)) +
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((1ULL << (AddressSpaceBits - 1)) - 1)};
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explicit FlatAddressSpaceMap(VaType va_limit,
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std::function<void(VaType, VaType)> unmap_callback = {});
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FlatAddressSpaceMap() = default;
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void Map(VaType virt, PaType phys, VaType size, ExtraBlockInfo extra_info = {}) {
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std::scoped_lock lock(block_mutex);
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MapLocked(virt, phys, size, extra_info);
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}
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void Unmap(VaType virt, VaType size) {
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std::scoped_lock lock(block_mutex);
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UnmapLocked(virt, size);
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}
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VaType GetVALimit() const {
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return va_limit;
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}
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protected:
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/**
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@ -33,68 +53,55 @@ protected:
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* another block with a different phys address is hit
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*/
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struct Block {
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VaType virt{UnmappedVa}; //!< VA of the block
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PaType phys{UnmappedPa}; //!< PA of the block, will increase 1-1 with VA until a new block
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//!< is encountered
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[[no_unique_address]] ExtraBlockInfo extraInfo;
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/// VA of the block
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VaType virt{UnmappedVa};
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/// PA of the block, will increase 1-1 with VA until a new block is encountered
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PaType phys{UnmappedPa};
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[[no_unique_address]] ExtraBlockInfo extra_info;
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Block() = default;
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Block(VaType virt_, PaType phys_, ExtraBlockInfo extraInfo_)
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: virt(virt_), phys(phys_), extraInfo(extraInfo_) {}
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Block(VaType virt_, PaType phys_, ExtraBlockInfo extra_info_)
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: virt(virt_), phys(phys_), extra_info(extra_info_) {}
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constexpr bool Valid() {
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bool Valid() const {
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return virt != UnmappedVa;
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}
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constexpr bool Mapped() {
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bool Mapped() const {
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return phys != UnmappedPa;
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}
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constexpr bool Unmapped() {
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bool Unmapped() const {
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return phys == UnmappedPa;
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}
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bool operator<(const VaType& pVirt) const {
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return virt < pVirt;
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bool operator<(const VaType& p_virt) const {
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return virt < p_virt;
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}
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};
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std::mutex blockMutex;
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std::vector<Block> blocks{Block{}};
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/**
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* @brief Maps a PA range into the given AS region
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* @note blockMutex MUST be locked when calling this
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* @note block_mutex MUST be locked when calling this
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*/
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void MapLocked(VaType virt, PaType phys, VaType size, ExtraBlockInfo extraInfo);
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void MapLocked(VaType virt, PaType phys, VaType size, ExtraBlockInfo extra_info);
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/**
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* @brief Unmaps the given range and merges it with other unmapped regions
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* @note blockMutex MUST be locked when calling this
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* @note block_mutex MUST be locked when calling this
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*/
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void UnmapLocked(VaType virt, VaType size);
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public:
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static constexpr VaType VaMaximum{(1ULL << (AddressSpaceBits - 1)) +
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((1ULL << (AddressSpaceBits - 1)) -
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1)}; //!< The maximum VA that this AS can technically reach
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std::mutex block_mutex;
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std::vector<Block> blocks{Block{}};
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VaType vaLimit{VaMaximum}; //!< A soft limit on the maximum VA of the AS
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/// a soft limit on the maximum VA of the AS
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VaType va_limit{VaMaximum};
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FlatAddressSpaceMap(VaType vaLimit, std::function<void(VaType, VaType)> unmapCallback = {});
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FlatAddressSpaceMap() = default;
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void Map(VaType virt, PaType phys, VaType size, ExtraBlockInfo extraInfo = {}) {
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std::scoped_lock lock(blockMutex);
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MapLocked(virt, phys, size, extraInfo);
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}
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void Unmap(VaType virt, VaType size) {
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std::scoped_lock lock(blockMutex);
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UnmapLocked(virt, size);
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}
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private:
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/// Callback called when the mappings in an region have changed
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std::function<void(VaType, VaType)> unmap_callback{};
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};
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/**
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@ -108,14 +115,8 @@ class FlatAllocator
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private:
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using Base = FlatAddressSpaceMap<VaType, UnmappedVa, bool, false, false, AddressSpaceBits>;
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VaType currentLinearAllocEnd; //!< The end address for the initial linear allocation pass, once
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//!< this reaches the AS limit the slower allocation path will be
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//!< used
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public:
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VaType vaStart; //!< The base VA of the allocator, no allocations will be below this
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FlatAllocator(VaType vaStart, VaType vaLimit = Base::VaMaximum);
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explicit FlatAllocator(VaType va_start, VaType va_limit = Base::VaMaximum);
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/**
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* @brief Allocates a region in the AS of the given size and returns its address
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@ -131,5 +132,19 @@ public:
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* @brief Frees an AS region so it can be used again
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*/
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void Free(VaType virt, VaType size);
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VaType GetVAStart() const {
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return va_start;
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}
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private:
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/// The base VA of the allocator, no allocations will be below this
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VaType va_start;
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/**
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* The end address for the initial linear allocation pass
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* Once this reaches the AS limit the slower allocation path will be used
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*/
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VaType current_linear_alloc_end;
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};
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} // namespace Common
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@ -30,137 +30,151 @@
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FlatAllocator<VaType, UnmappedVa, AddressSpaceBits>
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namespace Common {
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MAP_MEMBER_CONST()::FlatAddressSpaceMap(VaType vaLimit_,
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std::function<void(VaType, VaType)> unmapCallback_)
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: unmapCallback(std::move(unmapCallback_)), vaLimit(vaLimit_) {
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if (vaLimit > VaMaximum)
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MAP_MEMBER_CONST()::FlatAddressSpaceMap(VaType va_limit_,
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std::function<void(VaType, VaType)> unmap_callback_)
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: va_limit{va_limit_}, unmap_callback{std::move(unmap_callback_)} {
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if (va_limit > VaMaximum) {
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UNREACHABLE_MSG("Invalid VA limit!");
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}
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}
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MAP_MEMBER(void)::MapLocked(VaType virt, PaType phys, VaType size, ExtraBlockInfo extraInfo) {
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VaType virtEnd{virt + size};
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MAP_MEMBER(void)::MapLocked(VaType virt, PaType phys, VaType size, ExtraBlockInfo extra_info) {
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VaType virt_end{virt + size};
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if (virtEnd > vaLimit)
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UNREACHABLE_MSG("Trying to map a block past the VA limit: virtEnd: 0x{:X}, vaLimit: 0x{:X}",
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virtEnd, vaLimit);
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if (virt_end > va_limit) {
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UNREACHABLE_MSG(
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"Trying to map a block past the VA limit: virt_end: 0x{:X}, va_limit: 0x{:X}", virt_end,
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va_limit);
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}
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auto blockEndSuccessor{std::lower_bound(blocks.begin(), blocks.end(), virtEnd)};
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if (blockEndSuccessor == blocks.begin())
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UNREACHABLE_MSG("Trying to map a block before the VA start: virtEnd: 0x{:X}", virtEnd);
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auto block_end_successor{std::lower_bound(blocks.begin(), blocks.end(), virt_end)};
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if (block_end_successor == blocks.begin()) {
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UNREACHABLE_MSG("Trying to map a block before the VA start: virt_end: 0x{:X}", virt_end);
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}
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auto blockEndPredecessor{std::prev(blockEndSuccessor)};
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auto block_end_predecessor{std::prev(block_end_successor)};
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if (blockEndSuccessor != blocks.end()) {
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if (block_end_successor != blocks.end()) {
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// We have blocks in front of us, if one is directly in front then we don't have to add a
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// tail
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if (blockEndSuccessor->virt != virtEnd) {
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if (block_end_successor->virt != virt_end) {
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PaType tailPhys{[&]() -> PaType {
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if constexpr (!PaContigSplit) {
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return blockEndPredecessor
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->phys; // Always propagate unmapped regions rather than calculating offset
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// Always propagate unmapped regions rather than calculating offset
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return block_end_predecessor->phys;
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} else {
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if (blockEndPredecessor->Unmapped())
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return blockEndPredecessor->phys; // Always propagate unmapped regions
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// rather than calculating offset
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else
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return blockEndPredecessor->phys + virtEnd - blockEndPredecessor->virt;
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if (block_end_predecessor->Unmapped()) {
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// Always propagate unmapped regions rather than calculating offset
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return block_end_predecessor->phys;
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} else {
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return block_end_predecessor->phys + virt_end - block_end_predecessor->virt;
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}
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}
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}()};
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if (blockEndPredecessor->virt >= virt) {
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if (block_end_predecessor->virt >= virt) {
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// If this block's start would be overlapped by the map then reuse it as a tail
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// block
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blockEndPredecessor->virt = virtEnd;
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blockEndPredecessor->phys = tailPhys;
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blockEndPredecessor->extraInfo = blockEndPredecessor->extraInfo;
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block_end_predecessor->virt = virt_end;
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block_end_predecessor->phys = tailPhys;
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block_end_predecessor->extra_info = block_end_predecessor->extra_info;
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// No longer predecessor anymore
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blockEndSuccessor = blockEndPredecessor--;
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block_end_successor = block_end_predecessor--;
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} else {
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// Else insert a new one and we're done
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blocks.insert(blockEndSuccessor,
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{Block(virt, phys, extraInfo),
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Block(virtEnd, tailPhys, blockEndPredecessor->extraInfo)});
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if (unmapCallback)
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unmapCallback(virt, size);
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blocks.insert(block_end_successor,
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{Block(virt, phys, extra_info),
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Block(virt_end, tailPhys, block_end_predecessor->extra_info)});
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if (unmap_callback) {
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unmap_callback(virt, size);
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}
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return;
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}
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}
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} else {
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// blockEndPredecessor will always be unmapped as blocks has to be terminated by an unmapped
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// chunk
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if (blockEndPredecessor != blocks.begin() && blockEndPredecessor->virt >= virt) {
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// block_end_predecessor will always be unmapped as blocks has to be terminated by an
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// unmapped chunk
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if (block_end_predecessor != blocks.begin() && block_end_predecessor->virt >= virt) {
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// Move the unmapped block start backwards
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blockEndPredecessor->virt = virtEnd;
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block_end_predecessor->virt = virt_end;
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// No longer predecessor anymore
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blockEndSuccessor = blockEndPredecessor--;
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block_end_successor = block_end_predecessor--;
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} else {
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// Else insert a new one and we're done
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blocks.insert(blockEndSuccessor,
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{Block(virt, phys, extraInfo), Block(virtEnd, UnmappedPa, {})});
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if (unmapCallback)
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unmapCallback(virt, size);
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blocks.insert(block_end_successor,
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{Block(virt, phys, extra_info), Block(virt_end, UnmappedPa, {})});
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if (unmap_callback) {
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unmap_callback(virt, size);
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}
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return;
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}
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}
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auto blockStartSuccessor{blockEndSuccessor};
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auto block_start_successor{block_end_successor};
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// Walk the block vector to find the start successor as this is more efficient than another
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// binary search in most scenarios
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while (std::prev(blockStartSuccessor)->virt >= virt)
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blockStartSuccessor--;
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// Check that the start successor is either the end block or something in between
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if (blockStartSuccessor->virt > virtEnd) {
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UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", blockStartSuccessor->virt);
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} else if (blockStartSuccessor->virt == virtEnd) {
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// We need to create a new block as there are none spare that we would overwrite
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blocks.insert(blockStartSuccessor, Block(virt, phys, extraInfo));
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} else {
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// Erase overwritten blocks
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if (auto eraseStart{std::next(blockStartSuccessor)}; eraseStart != blockEndSuccessor)
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blocks.erase(eraseStart, blockEndSuccessor);
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// Reuse a block that would otherwise be overwritten as a start block
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blockStartSuccessor->virt = virt;
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blockStartSuccessor->phys = phys;
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blockStartSuccessor->extraInfo = extraInfo;
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while (std::prev(block_start_successor)->virt >= virt) {
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block_start_successor--;
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}
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if (unmapCallback)
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unmapCallback(virt, size);
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// Check that the start successor is either the end block or something in between
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if (block_start_successor->virt > virt_end) {
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UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", block_start_successor->virt);
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} else if (block_start_successor->virt == virt_end) {
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// We need to create a new block as there are none spare that we would overwrite
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blocks.insert(block_start_successor, Block(virt, phys, extra_info));
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} else {
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// Erase overwritten blocks
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if (auto eraseStart{std::next(block_start_successor)}; eraseStart != block_end_successor) {
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blocks.erase(eraseStart, block_end_successor);
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}
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// Reuse a block that would otherwise be overwritten as a start block
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block_start_successor->virt = virt;
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block_start_successor->phys = phys;
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block_start_successor->extra_info = extra_info;
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}
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if (unmap_callback) {
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unmap_callback(virt, size);
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}
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}
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MAP_MEMBER(void)::UnmapLocked(VaType virt, VaType size) {
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VaType virtEnd{virt + size};
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VaType virt_end{virt + size};
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if (virtEnd > vaLimit)
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UNREACHABLE_MSG("Trying to map a block past the VA limit: virtEnd: 0x{:X}, vaLimit: 0x{:X}",
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virtEnd, vaLimit);
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if (virt_end > va_limit) {
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UNREACHABLE_MSG(
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"Trying to map a block past the VA limit: virt_end: 0x{:X}, va_limit: 0x{:X}", virt_end,
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va_limit);
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}
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auto blockEndSuccessor{std::lower_bound(blocks.begin(), blocks.end(), virtEnd)};
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if (blockEndSuccessor == blocks.begin())
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UNREACHABLE_MSG("Trying to unmap a block before the VA start: virtEnd: 0x{:X}", virtEnd);
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auto block_end_successor{std::lower_bound(blocks.begin(), blocks.end(), virt_end)};
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if (block_end_successor == blocks.begin()) {
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UNREACHABLE_MSG("Trying to unmap a block before the VA start: virt_end: 0x{:X}", virt_end);
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}
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auto blockEndPredecessor{std::prev(blockEndSuccessor)};
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auto block_end_predecessor{std::prev(block_end_successor)};
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auto walkBackToPredecessor{[&](auto iter) {
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while (iter->virt >= virt)
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auto walk_back_to_predecessor{[&](auto iter) {
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while (iter->virt >= virt) {
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iter--;
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}
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return iter;
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}};
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auto eraseBlocksWithEndUnmapped{[&](auto unmappedEnd) {
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auto blockStartPredecessor{walkBackToPredecessor(unmappedEnd)};
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auto blockStartSuccessor{std::next(blockStartPredecessor)};
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auto erase_blocks_with_end_unmapped{[&](auto unmappedEnd) {
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auto block_start_predecessor{walk_back_to_predecessor(unmappedEnd)};
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auto block_start_successor{std::next(block_start_predecessor)};
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auto eraseEnd{[&]() {
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if (blockStartPredecessor->Unmapped()) {
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if (block_start_predecessor->Unmapped()) {
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// If the start predecessor is unmapped then we can erase everything in our region
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// and be done
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return std::next(unmappedEnd);
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@ -174,158 +188,171 @@ MAP_MEMBER(void)::UnmapLocked(VaType virt, VaType size) {
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// We can't have two unmapped regions after each other
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if (eraseEnd != blocks.end() &&
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(eraseEnd == blockStartSuccessor ||
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(blockStartPredecessor->Unmapped() && eraseEnd->Unmapped())))
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(eraseEnd == block_start_successor ||
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(block_start_predecessor->Unmapped() && eraseEnd->Unmapped()))) {
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UNREACHABLE_MSG("Multiple contiguous unmapped regions are unsupported!");
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}
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blocks.erase(blockStartSuccessor, eraseEnd);
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blocks.erase(block_start_successor, eraseEnd);
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}};
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// We can avoid any splitting logic if these are the case
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if (blockEndPredecessor->Unmapped()) {
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if (blockEndPredecessor->virt > virt)
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eraseBlocksWithEndUnmapped(blockEndPredecessor);
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if (block_end_predecessor->Unmapped()) {
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if (block_end_predecessor->virt > virt) {
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erase_blocks_with_end_unmapped(block_end_predecessor);
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}
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if (unmapCallback)
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unmapCallback(virt, size);
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if (unmap_callback) {
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unmap_callback(virt, size);
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}
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return; // The region is unmapped, bail out early
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} else if (blockEndSuccessor->virt == virtEnd && blockEndSuccessor->Unmapped()) {
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eraseBlocksWithEndUnmapped(blockEndSuccessor);
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} else if (block_end_successor->virt == virt_end && block_end_successor->Unmapped()) {
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erase_blocks_with_end_unmapped(block_end_successor);
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if (unmapCallback)
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unmapCallback(virt, size);
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if (unmap_callback) {
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unmap_callback(virt, size);
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}
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return; // The region is unmapped here and doesn't need splitting, bail out early
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} else if (blockEndSuccessor == blocks.end()) {
|
||||
} else if (block_end_successor == blocks.end()) {
|
||||
// This should never happen as the end should always follow an unmapped block
|
||||
UNREACHABLE_MSG("Unexpected Memory Manager state!");
|
||||
} else if (blockEndSuccessor->virt != virtEnd) {
|
||||
} else if (block_end_successor->virt != virt_end) {
|
||||
// If one block is directly in front then we don't have to add a tail
|
||||
|
||||
// The previous block is mapped so we will need to add a tail with an offset
|
||||
PaType tailPhys{[&]() {
|
||||
if constexpr (PaContigSplit)
|
||||
return blockEndPredecessor->phys + virtEnd - blockEndPredecessor->virt;
|
||||
else
|
||||
return blockEndPredecessor->phys;
|
||||
if constexpr (PaContigSplit) {
|
||||
return block_end_predecessor->phys + virt_end - block_end_predecessor->virt;
|
||||
} else {
|
||||
return block_end_predecessor->phys;
|
||||
}
|
||||
}()};
|
||||
|
||||
if (blockEndPredecessor->virt >= virt) {
|
||||
if (block_end_predecessor->virt >= virt) {
|
||||
// If this block's start would be overlapped by the unmap then reuse it as a tail block
|
||||
blockEndPredecessor->virt = virtEnd;
|
||||
blockEndPredecessor->phys = tailPhys;
|
||||
block_end_predecessor->virt = virt_end;
|
||||
block_end_predecessor->phys = tailPhys;
|
||||
|
||||
// No longer predecessor anymore
|
||||
blockEndSuccessor = blockEndPredecessor--;
|
||||
block_end_successor = block_end_predecessor--;
|
||||
} else {
|
||||
blocks.insert(blockEndSuccessor,
|
||||
blocks.insert(block_end_successor,
|
||||
{Block(virt, UnmappedPa, {}),
|
||||
Block(virtEnd, tailPhys, blockEndPredecessor->extraInfo)});
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
Block(virt_end, tailPhys, block_end_predecessor->extra_info)});
|
||||
if (unmap_callback) {
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
|
||||
return; // The previous block is mapped and ends before
|
||||
// The previous block is mapped and ends before
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
// Walk the block vector to find the start predecessor as this is more efficient than another
|
||||
// binary search in most scenarios
|
||||
auto blockStartPredecessor{walkBackToPredecessor(blockEndSuccessor)};
|
||||
auto blockStartSuccessor{std::next(blockStartPredecessor)};
|
||||
auto block_start_predecessor{walk_back_to_predecessor(block_end_successor)};
|
||||
auto block_start_successor{std::next(block_start_predecessor)};
|
||||
|
||||
if (blockStartSuccessor->virt > virtEnd) {
|
||||
UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", blockStartSuccessor->virt);
|
||||
} else if (blockStartSuccessor->virt == virtEnd) {
|
||||
if (block_start_successor->virt > virt_end) {
|
||||
UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", block_start_successor->virt);
|
||||
} else if (block_start_successor->virt == virt_end) {
|
||||
// There are no blocks between the start and the end that would let us skip inserting a new
|
||||
// one for head
|
||||
|
||||
// The previous block is may be unmapped, if so we don't need to insert any unmaps after it
|
||||
if (blockStartPredecessor->Mapped())
|
||||
blocks.insert(blockStartSuccessor, Block(virt, UnmappedPa, {}));
|
||||
} else if (blockStartPredecessor->Unmapped()) {
|
||||
if (block_start_predecessor->Mapped()) {
|
||||
blocks.insert(block_start_successor, Block(virt, UnmappedPa, {}));
|
||||
}
|
||||
} else if (block_start_predecessor->Unmapped()) {
|
||||
// If the previous block is unmapped
|
||||
blocks.erase(blockStartSuccessor, blockEndPredecessor);
|
||||
blocks.erase(block_start_successor, block_end_predecessor);
|
||||
} else {
|
||||
// Erase overwritten blocks, skipping the first one as we have written the unmapped start
|
||||
// block there
|
||||
if (auto eraseStart{std::next(blockStartSuccessor)}; eraseStart != blockEndSuccessor)
|
||||
blocks.erase(eraseStart, blockEndSuccessor);
|
||||
if (auto eraseStart{std::next(block_start_successor)}; eraseStart != block_end_successor) {
|
||||
blocks.erase(eraseStart, block_end_successor);
|
||||
}
|
||||
|
||||
// Add in the unmapped block header
|
||||
blockStartSuccessor->virt = virt;
|
||||
blockStartSuccessor->phys = UnmappedPa;
|
||||
block_start_successor->virt = virt;
|
||||
block_start_successor->phys = UnmappedPa;
|
||||
}
|
||||
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
if (unmap_callback)
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
|
||||
ALLOC_MEMBER_CONST()::FlatAllocator(VaType vaStart_, VaType vaLimit_)
|
||||
: Base(vaLimit_), currentLinearAllocEnd(vaStart_), vaStart(vaStart_) {}
|
||||
ALLOC_MEMBER_CONST()::FlatAllocator(VaType va_start_, VaType va_limit_)
|
||||
: Base{va_limit_}, va_start{va_start_}, current_linear_alloc_end{va_start_} {}
|
||||
|
||||
ALLOC_MEMBER(VaType)::Allocate(VaType size) {
|
||||
std::scoped_lock lock(this->blockMutex);
|
||||
std::scoped_lock lock(this->block_mutex);
|
||||
|
||||
VaType allocStart{UnmappedVa};
|
||||
VaType allocEnd{currentLinearAllocEnd + size};
|
||||
VaType alloc_start{UnmappedVa};
|
||||
VaType alloc_end{current_linear_alloc_end + size};
|
||||
|
||||
// Avoid searching backwards in the address space if possible
|
||||
if (allocEnd >= currentLinearAllocEnd && allocEnd <= this->vaLimit) {
|
||||
auto allocEndSuccessor{
|
||||
std::lower_bound(this->blocks.begin(), this->blocks.end(), allocEnd)};
|
||||
if (allocEndSuccessor == this->blocks.begin())
|
||||
if (alloc_end >= current_linear_alloc_end && alloc_end <= this->va_limit) {
|
||||
auto alloc_end_successor{
|
||||
std::lower_bound(this->blocks.begin(), this->blocks.end(), alloc_end)};
|
||||
if (alloc_end_successor == this->blocks.begin()) {
|
||||
UNREACHABLE_MSG("First block in AS map is invalid!");
|
||||
}
|
||||
|
||||
auto allocEndPredecessor{std::prev(allocEndSuccessor)};
|
||||
if (allocEndPredecessor->virt <= currentLinearAllocEnd) {
|
||||
allocStart = currentLinearAllocEnd;
|
||||
auto alloc_end_predecessor{std::prev(alloc_end_successor)};
|
||||
if (alloc_end_predecessor->virt <= current_linear_alloc_end) {
|
||||
alloc_start = current_linear_alloc_end;
|
||||
} else {
|
||||
// Skip over fixed any mappings in front of us
|
||||
while (allocEndSuccessor != this->blocks.end()) {
|
||||
if (allocEndSuccessor->virt - allocEndPredecessor->virt < size ||
|
||||
allocEndPredecessor->Mapped()) {
|
||||
allocStart = allocEndPredecessor->virt;
|
||||
while (alloc_end_successor != this->blocks.end()) {
|
||||
if (alloc_end_successor->virt - alloc_end_predecessor->virt < size ||
|
||||
alloc_end_predecessor->Mapped()) {
|
||||
alloc_start = alloc_end_predecessor->virt;
|
||||
break;
|
||||
}
|
||||
|
||||
allocEndPredecessor = allocEndSuccessor++;
|
||||
alloc_end_predecessor = alloc_end_successor++;
|
||||
|
||||
// Use the VA limit to calculate if we can fit in the final block since it has no
|
||||
// successor
|
||||
if (allocEndSuccessor == this->blocks.end()) {
|
||||
allocEnd = allocEndPredecessor->virt + size;
|
||||
if (alloc_end_successor == this->blocks.end()) {
|
||||
alloc_end = alloc_end_predecessor->virt + size;
|
||||
|
||||
if (allocEnd >= allocEndPredecessor->virt && allocEnd <= this->vaLimit)
|
||||
allocStart = allocEndPredecessor->virt;
|
||||
if (alloc_end >= alloc_end_predecessor->virt && alloc_end <= this->va_limit) {
|
||||
alloc_start = alloc_end_predecessor->virt;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (allocStart != UnmappedVa) {
|
||||
currentLinearAllocEnd = allocStart + size;
|
||||
if (alloc_start != UnmappedVa) {
|
||||
current_linear_alloc_end = alloc_start + size;
|
||||
} else { // If linear allocation overflows the AS then find a gap
|
||||
if (this->blocks.size() <= 2)
|
||||
if (this->blocks.size() <= 2) {
|
||||
UNREACHABLE_MSG("Unexpected allocator state!");
|
||||
|
||||
auto searchPredecessor{this->blocks.begin()};
|
||||
auto searchSuccessor{std::next(searchPredecessor)};
|
||||
|
||||
while (searchSuccessor != this->blocks.end() &&
|
||||
(searchSuccessor->virt - searchPredecessor->virt < size ||
|
||||
searchPredecessor->Mapped())) {
|
||||
searchPredecessor = searchSuccessor++;
|
||||
}
|
||||
|
||||
if (searchSuccessor != this->blocks.end())
|
||||
allocStart = searchPredecessor->virt;
|
||||
else
|
||||
auto search_predecessor{this->blocks.begin()};
|
||||
auto search_successor{std::next(search_predecessor)};
|
||||
|
||||
while (search_successor != this->blocks.end() &&
|
||||
(search_successor->virt - search_predecessor->virt < size ||
|
||||
search_predecessor->Mapped())) {
|
||||
search_predecessor = search_successor++;
|
||||
}
|
||||
|
||||
if (search_successor != this->blocks.end()) {
|
||||
alloc_start = search_predecessor->virt;
|
||||
} else {
|
||||
return {}; // AS is full
|
||||
}
|
||||
}
|
||||
|
||||
this->MapLocked(allocStart, true, size, {});
|
||||
return allocStart;
|
||||
this->MapLocked(alloc_start, true, size, {});
|
||||
return alloc_start;
|
||||
}
|
||||
|
||||
ALLOC_MEMBER(void)::AllocateFixed(VaType virt, VaType size) {
|
||||
|
|
|
|||
|
|
@ -472,16 +472,16 @@ void nvhost_as_gpu::GetVARegionsImpl(IoctlGetVaRegions& params) {
|
|||
|
||||
params.regions = std::array<VaRegion, 2>{
|
||||
VaRegion{
|
||||
.offset = vm.small_page_allocator->vaStart << VM::PAGE_SIZE_BITS,
|
||||
.offset = vm.small_page_allocator->GetVAStart() << VM::PAGE_SIZE_BITS,
|
||||
.page_size = VM::YUZU_PAGESIZE,
|
||||
._pad0_{},
|
||||
.pages = vm.small_page_allocator->vaLimit - vm.small_page_allocator->vaStart,
|
||||
.pages = vm.small_page_allocator->GetVALimit() - vm.small_page_allocator->GetVAStart(),
|
||||
},
|
||||
VaRegion{
|
||||
.offset = vm.big_page_allocator->vaStart << vm.big_page_size_bits,
|
||||
.offset = vm.big_page_allocator->GetVAStart() << vm.big_page_size_bits,
|
||||
.page_size = vm.big_page_size,
|
||||
._pad0_{},
|
||||
.pages = vm.big_page_allocator->vaLimit - vm.big_page_allocator->vaStart,
|
||||
.pages = vm.big_page_allocator->GetVALimit() - vm.big_page_allocator->GetVAStart(),
|
||||
},
|
||||
};
|
||||
}
|
||||
|
|
|
|||
Reference in New Issue