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[35.221.247.27]) by smtp.gmail.com with ESMTPSA id d14-20020aa7868e000000b0065980654baasm9142154pfo.130.2023.08.01.23.54.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Aug 2023 23:54:57 -0700 (PDT) To: libcamera-devel@lists.libcamera.org Date: Wed, 2 Aug 2023 06:51:43 +0000 Message-ID: <20230802065449.2904457-2-chenghaoyang@chromium.org> X-Mailer: git-send-email 2.41.0.585.gd2178a4bd4-goog In-Reply-To: <20230802065449.2904457-1-chenghaoyang@chromium.org> References: <20230802065449.2904457-1-chenghaoyang@chromium.org> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v7 1/3] libcamera: Move DmaHeap to HeapAllocator as a base class X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Harvey Yang via libcamera-devel From: Cheng-Hao Yang Reply-To: Harvey Yang Cc: Harvey Yang Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" As other components (like the WIP virtual pipeline handler) also need a heap allocator, move DmaHeap from raspberry pi pipeline handler to a general HeapAllocator as a base class. Signed-off-by: Harvey Yang --- .../libcamera/internal/heap_allocator.h | 18 +- include/libcamera/internal/meson.build | 1 + src/libcamera/heap_allocator.cpp | 192 ++++++++++++++++++ src/libcamera/meson.build | 1 + src/libcamera/pipeline/rpi/vc4/dma_heaps.cpp | 90 -------- src/libcamera/pipeline/rpi/vc4/meson.build | 5 +- src/libcamera/pipeline/rpi/vc4/vc4.cpp | 11 +- 7 files changed, 209 insertions(+), 109 deletions(-) rename src/libcamera/pipeline/rpi/vc4/dma_heaps.h => include/libcamera/internal/heap_allocator.h (57%) create mode 100644 src/libcamera/heap_allocator.cpp delete mode 100644 src/libcamera/pipeline/rpi/vc4/dma_heaps.cpp diff --git a/src/libcamera/pipeline/rpi/vc4/dma_heaps.h b/include/libcamera/internal/heap_allocator.h similarity index 57% rename from src/libcamera/pipeline/rpi/vc4/dma_heaps.h rename to include/libcamera/internal/heap_allocator.h index 0a4a8d86..6620fa23 100644 --- a/src/libcamera/pipeline/rpi/vc4/dma_heaps.h +++ b/include/libcamera/internal/heap_allocator.h @@ -1,8 +1,9 @@ /* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2020, Raspberry Pi Ltd + * Copyright (C) 2023, Google Inc. * - * dma_heaps.h - Helper class for dma-heap allocations. + * heap_allocator.h - Helper class for heap buffer allocations. */ #pragma once @@ -13,20 +14,19 @@ namespace libcamera { -namespace RPi { +class Heap; -class DmaHeap +class HeapAllocator { public: - DmaHeap(); - ~DmaHeap(); - bool isValid() const { return dmaHeapHandle_.isValid(); } + HeapAllocator(); + ~HeapAllocator(); + + bool isValid() const; UniqueFD alloc(const char *name, std::size_t size); private: - UniqueFD dmaHeapHandle_; + std::unique_ptr heap_; }; -} /* namespace RPi */ - } /* namespace libcamera */ diff --git a/include/libcamera/internal/meson.build b/include/libcamera/internal/meson.build index 7f1f3440..3030d039 100644 --- a/include/libcamera/internal/meson.build +++ b/include/libcamera/internal/meson.build @@ -27,6 +27,7 @@ libcamera_internal_headers = files([ 'device_enumerator_udev.h', 'formats.h', 'framebuffer.h', + 'heap_allocator.h', 'ipa_manager.h', 'ipa_module.h', 'ipa_proxy.h', diff --git a/src/libcamera/heap_allocator.cpp b/src/libcamera/heap_allocator.cpp new file mode 100644 index 00000000..2a825d93 --- /dev/null +++ b/src/libcamera/heap_allocator.cpp @@ -0,0 +1,192 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2020, Raspberry Pi Ltd + * Copyright (C) 2023, Google Inc. + * + * heap_allocator.cpp - Helper class for heap buffer allocations. + */ + +#include "libcamera/internal/heap_allocator.h" + +#include +#include +#include +#include + +#include +#include + +#include + +/** + * \file libcamera/internal/heap_allocator.h + * \brief Internal heap buffer allocator support + */ + +namespace libcamera { + +/* + * /dev/dma-heap/linux,cma is the dma-heap allocator, which allows dmaheap-cma + * to only have to worry about importing. + * + * Annoyingly, should the cma heap size be specified on the kernel command line + * instead of DT, the heap gets named "reserved" instead. + */ +static constexpr std::array dmaHeapNames = { + "/dev/dma_heap/linux,cma", + "/dev/dma_heap/reserved", + "/dev/dma_heap/system" +}; + +LOG_DEFINE_CATEGORY(HeapAllocator) + +/** + * \class Heap + * \brief The virtual base class for different implementations + */ +class Heap +{ +public: + virtual ~Heap() = default; + bool isValid() const { return handle_.isValid(); } + virtual UniqueFD alloc(const char *name, std::size_t size) = 0; + +protected: + UniqueFD handle_; +}; + +/** + * \var Heap::handle_ + * \brief A common UniqueFD to allocate buffers + */ + +/** + * \fn Heap::isValid() + * \brief Return true if the heap is valid + */ + +/** + * \fn Heap::alloc() + * \brief Return a valid UniqueFD if a heap buffer is allocated + * \param[in] name The name of the allocated buffer + * \param[in] size The size in byte of the allocated buffer + */ + +/** + * \class DmaHeap + * \brief The derived class of Heap with DMA implementation + */ +class DmaHeap : public Heap +{ +public: + DmaHeap(); + ~DmaHeap(); + UniqueFD alloc(const char *name, std::size_t size) override; +}; + +/** + * \brief Construct a DmaHeap with a list of |dmaHeapNames| + */ +DmaHeap::DmaHeap() +{ + for (const char *name : dmaHeapNames) { + int ret = ::open(name, O_RDWR | O_CLOEXEC); + if (ret < 0) { + ret = errno; + LOG(HeapAllocator, Debug) << "DmaHeap failed to open " << name << ": " + << strerror(ret); + continue; + } + + handle_ = UniqueFD(ret); + break; + } + + if (!handle_.isValid()) + LOG(HeapAllocator, Error) << "DmaHeap could not open any dmaHeap device"; +} + +DmaHeap::~DmaHeap() = default; + +UniqueFD DmaHeap::alloc(const char *name, std::size_t size) +{ + int ret; + + if (!name) + return {}; + + struct dma_heap_allocation_data alloc = {}; + + alloc.len = size; + alloc.fd_flags = O_CLOEXEC | O_RDWR; + + ret = ::ioctl(handle_.get(), DMA_HEAP_IOCTL_ALLOC, &alloc); + if (ret < 0) { + LOG(HeapAllocator, Error) << "DmaHeap allocation failure for " + << name; + return {}; + } + + UniqueFD allocFd(alloc.fd); + ret = ::ioctl(allocFd.get(), DMA_BUF_SET_NAME, name); + if (ret < 0) { + LOG(HeapAllocator, Error) << "DmaHeap naming failure for " + << name; + return {}; + } + + return allocFd; +} + +/** + * \class HeapAllocator + * \brief The allocator that allocates heap buffers + * + * HeapAllocator class is the interface for pipeline handlers to allocate heap + * buffers. It finds a usable heap implementation, if any, and users don't need + * to know the details. Users should check if the HeapAllocator instance is + * valid though before using it. + */ + +/** + * \var HeapAllocator::heap_ + * \brief The heap instance used to allocate heap buffers. + * Should be initialized in the c'tor. + */ + +/** + * \brief Construct a HeapAllocator with DmaHeap implementation + */ +HeapAllocator::HeapAllocator() +{ + heap_ = std::make_unique(); +} + +HeapAllocator::~HeapAllocator() = default; + +/** + * \fn HeapAllocator::isValid() + * \brief Return true if the HeapAllocator works with a Heap implementation + */ +bool HeapAllocator::isValid() const +{ + return heap_->isValid(); +} + +/** + * \fn HeapAllocator::alloc() + * \brief Return a valid UniqueFD if a heap buffer is allocated + * \param[in] name The name of the allocated buffer + * \param[in] size The size in byte of the allocated buffer + */ +UniqueFD HeapAllocator::alloc(const char *name, std::size_t size) +{ + if (!isValid()) { + LOG(HeapAllocator, Fatal) << "Allocation attempted without allocator" << name; + return {}; + } + + return heap_->alloc(name, size); +} + +} /* namespace libcamera */ diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build index b24f8296..967f08e6 100644 --- a/src/libcamera/meson.build +++ b/src/libcamera/meson.build @@ -22,6 +22,7 @@ libcamera_sources = files([ 'framebuffer.cpp', 'framebuffer_allocator.cpp', 'geometry.cpp', + 'heap_allocator.cpp', 'ipa_controls.cpp', 'ipa_data_serializer.cpp', 'ipa_interface.cpp', diff --git a/src/libcamera/pipeline/rpi/vc4/dma_heaps.cpp b/src/libcamera/pipeline/rpi/vc4/dma_heaps.cpp deleted file mode 100644 index 317b1fc1..00000000 --- a/src/libcamera/pipeline/rpi/vc4/dma_heaps.cpp +++ /dev/null @@ -1,90 +0,0 @@ -/* SPDX-License-Identifier: LGPL-2.1-or-later */ -/* - * Copyright (C) 2020, Raspberry Pi Ltd - * - * dma_heaps.h - Helper class for dma-heap allocations. - */ - -#include "dma_heaps.h" - -#include -#include -#include -#include -#include -#include - -#include - -/* - * /dev/dma-heap/linux,cma is the dma-heap allocator, which allows dmaheap-cma - * to only have to worry about importing. - * - * Annoyingly, should the cma heap size be specified on the kernel command line - * instead of DT, the heap gets named "reserved" instead. - */ -static constexpr std::array heapNames = { - "/dev/dma_heap/linux,cma", - "/dev/dma_heap/reserved" -}; - -namespace libcamera { - -LOG_DECLARE_CATEGORY(RPI) - -namespace RPi { - -DmaHeap::DmaHeap() -{ - for (const char *name : heapNames) { - int ret = ::open(name, O_RDWR | O_CLOEXEC, 0); - if (ret < 0) { - ret = errno; - LOG(RPI, Debug) << "Failed to open " << name << ": " - << strerror(ret); - continue; - } - - dmaHeapHandle_ = UniqueFD(ret); - break; - } - - if (!dmaHeapHandle_.isValid()) - LOG(RPI, Error) << "Could not open any dmaHeap device"; -} - -DmaHeap::~DmaHeap() = default; - -UniqueFD DmaHeap::alloc(const char *name, std::size_t size) -{ - int ret; - - if (!name) - return {}; - - struct dma_heap_allocation_data alloc = {}; - - alloc.len = size; - alloc.fd_flags = O_CLOEXEC | O_RDWR; - - ret = ::ioctl(dmaHeapHandle_.get(), DMA_HEAP_IOCTL_ALLOC, &alloc); - if (ret < 0) { - LOG(RPI, Error) << "dmaHeap allocation failure for " - << name; - return {}; - } - - UniqueFD allocFd(alloc.fd); - ret = ::ioctl(allocFd.get(), DMA_BUF_SET_NAME, name); - if (ret < 0) { - LOG(RPI, Error) << "dmaHeap naming failure for " - << name; - return {}; - } - - return allocFd; -} - -} /* namespace RPi */ - -} /* namespace libcamera */ diff --git a/src/libcamera/pipeline/rpi/vc4/meson.build b/src/libcamera/pipeline/rpi/vc4/meson.build index cdb049c5..b2b79735 100644 --- a/src/libcamera/pipeline/rpi/vc4/meson.build +++ b/src/libcamera/pipeline/rpi/vc4/meson.build @@ -1,8 +1,5 @@ # SPDX-License-Identifier: CC0-1.0 -libcamera_sources += files([ - 'dma_heaps.cpp', - 'vc4.cpp', -]) +libcamera_sources += files(['vc4.cpp']) subdir('data') diff --git a/src/libcamera/pipeline/rpi/vc4/vc4.cpp b/src/libcamera/pipeline/rpi/vc4/vc4.cpp index 018cf488..410ecfaf 100644 --- a/src/libcamera/pipeline/rpi/vc4/vc4.cpp +++ b/src/libcamera/pipeline/rpi/vc4/vc4.cpp @@ -12,12 +12,11 @@ #include #include "libcamera/internal/device_enumerator.h" +#include "libcamera/internal/heap_allocator.h" #include "../common/pipeline_base.h" #include "../common/rpi_stream.h" -#include "dma_heaps.h" - using namespace std::chrono_literals; namespace libcamera { @@ -87,7 +86,7 @@ public: RPi::Device isp_; /* DMAHEAP allocation helper. */ - RPi::DmaHeap dmaHeap_; + HeapAllocator heapAllocator_; SharedFD lsTable_; struct Config { @@ -296,7 +295,7 @@ int PipelineHandlerVc4::platformRegister(std::unique_ptr &camer { Vc4CameraData *data = static_cast(cameraData.get()); - if (!data->dmaHeap_.isValid()) + if (!data->heapAllocator_.isValid()) return -ENOMEM; MediaEntity *unicamImage = unicam->getEntityByName("unicam-image"); @@ -670,9 +669,9 @@ int Vc4CameraData::platformConfigureIpa(ipa::RPi::ConfigParams ¶ms) { params.ispControls = isp_[Isp::Input].dev()->controls(); - /* Allocate the lens shading table via dmaHeap and pass to the IPA. */ + /* Allocate the lens shading table via heapAllocator and pass to the IPA. */ if (!lsTable_.isValid()) { - lsTable_ = SharedFD(dmaHeap_.alloc("ls_grid", ipa::RPi::MaxLsGridSize)); + lsTable_ = SharedFD(heapAllocator_.alloc("ls_grid", ipa::RPi::MaxLsGridSize)); if (!lsTable_.isValid()) return -ENOMEM;