diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libcamera/dma_buf_allocator.cpp | 162 | ||||
| -rw-r--r-- | src/libcamera/dma_heaps.cpp | 165 | ||||
| -rw-r--r-- | src/libcamera/meson.build | 2 | ||||
| -rw-r--r-- | src/libcamera/pipeline/rpi/vc4/vc4.cpp | 4 | ||||
| -rw-r--r-- | src/libcamera/software_isp/software_isp.cpp | 5 |
5 files changed, 168 insertions, 170 deletions
diff --git a/src/libcamera/dma_buf_allocator.cpp b/src/libcamera/dma_buf_allocator.cpp new file mode 100644 index 00000000..af512512 --- /dev/null +++ b/src/libcamera/dma_buf_allocator.cpp @@ -0,0 +1,162 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2024, Red Hat Inc. + * Copyright (C) 2020, Raspberry Pi Ltd + * + * Helper class for dma-buf allocations. + */ + +#include "libcamera/internal/dma_buf_allocator.h" + +#include <array> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <unistd.h> + +#include <linux/dma-buf.h> +#include <linux/dma-heap.h> + +#include <libcamera/base/log.h> + +/** + * \file dma_buf_allocator.cpp + * \brief dma-buf allocator + */ + +namespace libcamera { + +#ifndef __DOXYGEN__ +struct DmaBufAllocatorInfo { + DmaBufAllocator::DmaBufAllocatorFlag type; + const char *deviceNodeName; +}; +#endif + +static constexpr std::array<DmaBufAllocatorInfo, 3> providerInfos = { { + /* + * /dev/dma_heap/linux,cma is the CMA dma-heap. When the cma heap size is + * specified on the kernel command line, this gets renamed to "reserved". + */ + { DmaBufAllocator::DmaBufAllocatorFlag::CmaHeap, "/dev/dma_heap/linux,cma" }, + { DmaBufAllocator::DmaBufAllocatorFlag::CmaHeap, "/dev/dma_heap/reserved" }, + { DmaBufAllocator::DmaBufAllocatorFlag::SystemHeap, "/dev/dma_heap/system" }, +} }; + +LOG_DEFINE_CATEGORY(DmaBufAllocator) + +/** + * \class DmaBufAllocator + * \brief Helper class for dma-buf allocations + * + * This class wraps a userspace dma-buf provider selected at construction time, + * and exposes functions to allocate dma-buffers from this provider. + * + * Different providers may provide dma-buffers with different properties for + * the underlying memory. Which providers are acceptable is specified through + * the type argument passed to the DmaBufAllocator() constructor. + */ + +/** + * \enum DmaBufAllocator::DmaBufAllocatorFlag + * \brief Type of the dma-buf provider + * \var DmaBufAllocator::CmaHeap + * \brief Allocate from a CMA dma-heap, providing physically-contiguous memory + * \var DmaBufAllocator::SystemHeap + * \brief Allocate from the system dma-heap, using the page allocator + */ + +/** + * \typedef DmaBufAllocator::DmaBufAllocatorFlags + * \brief A bitwise combination of DmaBufAllocator::DmaBufAllocatorFlag values + */ + +/** + * \brief Construct a DmaBufAllocator of a given type + * \param[in] type The type(s) of the dma-buf providers to allocate from + * + * The dma-buf provider type is selected with the \a type parameter, which + * defaults to the CMA heap. If no provider of the given type can be accessed, + * the constructed DmaBufAllocator instance is invalid as indicated by + * the isValid() function. + * + * Multiple types can be selected by combining type flags, in which case + * the constructed DmaBufAllocator will match one of the types. If multiple + * requested types can work on the system, which provider is used is undefined. + */ +DmaBufAllocator::DmaBufAllocator(DmaBufAllocatorFlags type) +{ + for (const auto &info : providerInfos) { + if (!(type & info.type)) + continue; + + int ret = ::open(info.deviceNodeName, O_RDWR | O_CLOEXEC, 0); + if (ret < 0) { + ret = errno; + LOG(DmaBufAllocator, Debug) + << "Failed to open " << info.deviceNodeName << ": " + << strerror(ret); + continue; + } + + LOG(DmaBufAllocator, Debug) << "Using " << info.deviceNodeName; + providerHandle_ = UniqueFD(ret); + break; + } + + if (!providerHandle_.isValid()) + LOG(DmaBufAllocator, Error) << "Could not open any dma-buf provider"; +} + +/** + * \brief Destroy the DmaBufAllocator instance + */ +DmaBufAllocator::~DmaBufAllocator() = default; + +/** + * \fn DmaBufAllocator::isValid() + * \brief Check if the DmaBufAllocator instance is valid + * \return True if the DmaBufAllocator is valid, false otherwise + */ + +/** + * \brief Allocate a dma-buf from the DmaBufAllocator + * \param [in] name The name to set for the allocated buffer + * \param [in] size The size of the buffer to allocate + * + * Allocates a dma-buf with read/write access. + * + * If the allocation fails, return an invalid UniqueFD. + * + * \return The UniqueFD of the allocated buffer + */ +UniqueFD DmaBufAllocator::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(providerHandle_.get(), DMA_HEAP_IOCTL_ALLOC, &alloc); + if (ret < 0) { + LOG(DmaBufAllocator, Error) + << "dma-heap allocation failure for " << name; + return {}; + } + + UniqueFD allocFd(alloc.fd); + ret = ::ioctl(allocFd.get(), DMA_BUF_SET_NAME, name); + if (ret < 0) { + LOG(DmaBufAllocator, Error) + << "dma-heap naming failure for " << name; + return {}; + } + + return allocFd; +} + +} /* namespace libcamera */ diff --git a/src/libcamera/dma_heaps.cpp b/src/libcamera/dma_heaps.cpp deleted file mode 100644 index d4cb880b..00000000 --- a/src/libcamera/dma_heaps.cpp +++ /dev/null @@ -1,165 +0,0 @@ -/* SPDX-License-Identifier: LGPL-2.1-or-later */ -/* - * Copyright (C) 2020, Raspberry Pi Ltd - * - * Helper class for dma-heap allocations. - */ - -#include "libcamera/internal/dma_heaps.h" - -#include <array> -#include <fcntl.h> -#include <sys/ioctl.h> -#include <unistd.h> - -#include <linux/dma-buf.h> -#include <linux/dma-heap.h> - -#include <libcamera/base/log.h> - -/** - * \file dma_heaps.cpp - * \brief dma-heap allocator - */ - -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. - */ - -#ifndef __DOXYGEN__ -struct DmaHeapInfo { - DmaHeap::DmaHeapFlag type; - const char *deviceNodeName; -}; -#endif - -static constexpr std::array<DmaHeapInfo, 3> heapInfos = { { - { DmaHeap::DmaHeapFlag::Cma, "/dev/dma_heap/linux,cma" }, - { DmaHeap::DmaHeapFlag::Cma, "/dev/dma_heap/reserved" }, - { DmaHeap::DmaHeapFlag::System, "/dev/dma_heap/system" }, -} }; - -LOG_DEFINE_CATEGORY(DmaHeap) - -/** - * \class DmaHeap - * \brief Helper class for dma-heap allocations - * - * DMA heaps are kernel devices that provide an API to allocate memory from - * different pools called "heaps", wrap each allocated piece of memory in a - * dmabuf object, and return the dmabuf file descriptor to userspace. Multiple - * heaps can be provided by the system, with different properties for the - * underlying memory. - * - * This class wraps a DMA heap selected at construction time, and exposes - * functions to manage memory allocation. - */ - -/** - * \enum DmaHeap::DmaHeapFlag - * \brief Type of the dma-heap - * \var DmaHeap::Cma - * \brief Allocate from a CMA dma-heap, providing physically-contiguous memory - * \var DmaHeap::System - * \brief Allocate from the system dma-heap, using the page allocator - */ - -/** - * \typedef DmaHeap::DmaHeapFlags - * \brief A bitwise combination of DmaHeap::DmaHeapFlag values - */ - -/** - * \brief Construct a DmaHeap of a given type - * \param[in] type The type(s) of the dma-heap(s) to allocate from - * - * The DMA heap type is selected with the \a type parameter, which defaults to - * the CMA heap. If no heap of the given type can be accessed, the constructed - * DmaHeap instance is invalid as indicated by the isValid() function. - * - * Multiple types can be selected by combining type flags, in which case the - * constructed DmaHeap will match one of the types. If the system provides - * multiple heaps that match the requested types, which heap is used is - * undefined. - */ -DmaHeap::DmaHeap(DmaHeapFlags type) -{ - for (const auto &info : heapInfos) { - if (!(type & info.type)) - continue; - - int ret = ::open(info.deviceNodeName, O_RDWR | O_CLOEXEC, 0); - if (ret < 0) { - ret = errno; - LOG(DmaHeap, Debug) - << "Failed to open " << info.deviceNodeName << ": " - << strerror(ret); - continue; - } - - LOG(DmaHeap, Debug) << "Using " << info.deviceNodeName; - dmaHeapHandle_ = UniqueFD(ret); - break; - } - - if (!dmaHeapHandle_.isValid()) - LOG(DmaHeap, Error) << "Could not open any dmaHeap device"; -} - -/** - * \brief Destroy the DmaHeap instance - */ -DmaHeap::~DmaHeap() = default; - -/** - * \fn DmaHeap::isValid() - * \brief Check if the DmaHeap instance is valid - * \return True if the DmaHeap is valid, false otherwise - */ - -/** - * \brief Allocate a dma-buf from the DmaHeap - * \param [in] name The name to set for the allocated buffer - * \param [in] size The size of the buffer to allocate - * - * Allocates a dma-buf with read/write access. - * - * If the allocation fails, return an invalid UniqueFD. - * - * \return The UniqueFD of the allocated buffer - */ -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(DmaHeap, Error) << "dmaHeap allocation failure for " << name; - return {}; - } - - UniqueFD allocFd(alloc.fd); - ret = ::ioctl(allocFd.get(), DMA_BUF_SET_NAME, name); - if (ret < 0) { - LOG(DmaHeap, Error) << "dmaHeap naming failure for " << name; - return {}; - } - - return allocFd; -} - -} /* namespace libcamera */ diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build index a3b12bc1..89504cee 100644 --- a/src/libcamera/meson.build +++ b/src/libcamera/meson.build @@ -15,7 +15,7 @@ libcamera_sources = files([ 'delayed_controls.cpp', 'device_enumerator.cpp', 'device_enumerator_sysfs.cpp', - 'dma_heaps.cpp', + 'dma_buf_allocator.cpp', 'fence.cpp', 'formats.cpp', 'framebuffer.cpp', diff --git a/src/libcamera/pipeline/rpi/vc4/vc4.cpp b/src/libcamera/pipeline/rpi/vc4/vc4.cpp index 37fb310f..4a89e35f 100644 --- a/src/libcamera/pipeline/rpi/vc4/vc4.cpp +++ b/src/libcamera/pipeline/rpi/vc4/vc4.cpp @@ -12,7 +12,7 @@ #include <libcamera/formats.h> #include "libcamera/internal/device_enumerator.h" -#include "libcamera/internal/dma_heaps.h" +#include "libcamera/internal/dma_buf_allocator.h" #include "../common/pipeline_base.h" #include "../common/rpi_stream.h" @@ -86,7 +86,7 @@ public: RPi::Device<Isp, 4> isp_; /* DMAHEAP allocation helper. */ - DmaHeap dmaHeap_; + DmaBufAllocator dmaHeap_; SharedFD lsTable_; struct Config { diff --git a/src/libcamera/software_isp/software_isp.cpp b/src/libcamera/software_isp/software_isp.cpp index 0efe1d4e..034727c5 100644 --- a/src/libcamera/software_isp/software_isp.cpp +++ b/src/libcamera/software_isp/software_isp.cpp @@ -66,7 +66,8 @@ LOG_DEFINE_CATEGORY(SoftwareIsp) * handler */ SoftwareIsp::SoftwareIsp(PipelineHandler *pipe, const CameraSensor *sensor) - : dmaHeap_(DmaHeap::DmaHeapFlag::Cma | DmaHeap::DmaHeapFlag::System) + : dmaHeap_(DmaBufAllocator::DmaBufAllocatorFlag::CmaHeap | + DmaBufAllocator::DmaBufAllocatorFlag::SystemHeap) { /* * debayerParams_ must be initialized because the initial value is used for @@ -86,7 +87,7 @@ SoftwareIsp::SoftwareIsp(PipelineHandler *pipe, const CameraSensor *sensor) } if (!dmaHeap_.isValid()) { - LOG(SoftwareIsp, Error) << "Failed to create DmaHeap object"; + LOG(SoftwareIsp, Error) << "Failed to create DmaBufAllocator object"; return; } |