From 96e50c6a43352a9cb81d558fea27e580f2b26585 Mon Sep 17 00:00:00 2001
From: Andrey Konovalov <andrey.konovalov@linaro.org>
Date: Mon, 11 Mar 2024 15:15:06 +0100
Subject: [PATCH 02/21] libcamera: internal: Move dma_heaps.[h, cpp] to common
directories
DmaHeap class is useful outside the RPi pipeline handler too.
Move dma_heaps.h and dma_heaps.cpp to common directories. Update
the build files and RPi vc4 pipeline handler accordingly.
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # sc8280xp Lenovo x13s
Tested-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
---
.../libcamera/internal}/dma_heaps.h | 4 -
include/libcamera/internal/meson.build | 1 +
src/libcamera/dma_heaps.cpp | 127 ++++++++++++++++++
src/libcamera/meson.build | 1 +
src/libcamera/pipeline/rpi/vc4/dma_heaps.cpp | 90 -------------
src/libcamera/pipeline/rpi/vc4/meson.build | 1 -
src/libcamera/pipeline/rpi/vc4/vc4.cpp | 5 +-
7 files changed, 131 insertions(+), 98 deletions(-)
rename {src/libcamera/pipeline/rpi/vc4 => include/libcamera/internal}/dma_heaps.h (92%)
create mode 100644 src/libcamera/dma_heaps.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/dma_heaps.h
similarity index 92%
rename from src/libcamera/pipeline/rpi/vc4/dma_heaps.h
rename to include/libcamera/internal/dma_heaps.h
index 0a4a8d86..cff8f140 100644
--- a/src/libcamera/pipeline/rpi/vc4/dma_heaps.h
+++ b/include/libcamera/internal/dma_heaps.h
@@ -13,8 +13,6 @@
namespace libcamera {
-namespace RPi {
-
class DmaHeap
{
public:
@@ -27,6 +25,4 @@ private:
UniqueFD dmaHeapHandle_;
};
-} /* namespace RPi */
-
} /* namespace libcamera */
diff --git a/include/libcamera/internal/meson.build b/include/libcamera/internal/meson.build
index 7f1f3440..33eb0fb3 100644
--- a/include/libcamera/internal/meson.build
+++ b/include/libcamera/internal/meson.build
@@ -25,6 +25,7 @@ libcamera_internal_headers = files([
'device_enumerator.h',
'device_enumerator_sysfs.h',
'device_enumerator_udev.h',
+ 'dma_heaps.h',
'formats.h',
'framebuffer.h',
'ipa_manager.h',
diff --git a/src/libcamera/dma_heaps.cpp b/src/libcamera/dma_heaps.cpp
new file mode 100644
index 00000000..38ef175a
--- /dev/null
+++ b/src/libcamera/dma_heaps.cpp
@@ -0,0 +1,127 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2020, Raspberry Pi Ltd
+ *
+ * dma_heaps.h - 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 CMA dma-heap allocator
+ */
+
+/*
+ * /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<const char *, 2> heapNames = {
+ "/dev/dma_heap/linux,cma",
+ "/dev/dma_heap/reserved"
+};
+
+namespace libcamera {
+
+LOG_DEFINE_CATEGORY(DmaHeap)
+
+/**
+ * \class DmaHeap
+ * \brief Helper class for CMA dma-heap allocations
+ */
+
+/**
+ * \brief Construct a DmaHeap that owns a CMA dma-heap file descriptor
+ *
+ * Goes through the internal list of possible names of the CMA dma-heap devices
+ * until a CMA dma-heap device is successfully opened. If it fails to open any
+ * dma-heap device, an invalid DmaHeap object is constructed. A valid DmaHeap
+ * object owns a wrapped dma-heap file descriptor.
+ *
+ * Please check the new DmaHeap object with \ref DmaHeap::isValid before using it.
+ */
+DmaHeap::DmaHeap()
+{
+ for (const char *name : heapNames) {
+ int ret = ::open(name, O_RDWR | O_CLOEXEC, 0);
+ if (ret < 0) {
+ ret = errno;
+ LOG(DmaHeap, Debug)
+ << "Failed to open " << name << ": "
+ << strerror(ret);
+ continue;
+ }
+
+ dmaHeapHandle_ = UniqueFD(ret);
+ break;
+ }
+
+ if (!dmaHeapHandle_.isValid())
+ LOG(DmaHeap, Error) << "Could not open any dmaHeap device";
+}
+
+/**
+ * \brief Destroy the DmaHeap instance
+ *
+ * Destroying a DmaHeap instance which owns a wrapped dma-heap file descriptor
+ * closes the descriptor automatically.
+ */
+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
+ * \return The \ref UniqueFD of the allocated buffer
+ *
+ * Allocates a dma-buf with read/write access.
+ * If the allocation fails returns invalid UniqueFD.
+ */
+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 45f63e93..3c5e43df 100644
--- a/src/libcamera/meson.build
+++ b/src/libcamera/meson.build
@@ -17,6 +17,7 @@ libcamera_sources = files([
'delayed_controls.cpp',
'device_enumerator.cpp',
'device_enumerator_sysfs.cpp',
+ 'dma_heaps.cpp',
'fence.cpp',
'formats.cpp',
'framebuffer.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 <array>
-#include <fcntl.h>
-#include <linux/dma-buf.h>
-#include <linux/dma-heap.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
-
-#include <libcamera/base/log.h>
-
-/*
- * /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<const char *, 2> 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..386e2296 100644
--- a/src/libcamera/pipeline/rpi/vc4/meson.build
+++ b/src/libcamera/pipeline/rpi/vc4/meson.build
@@ -1,7 +1,6 @@
# SPDX-License-Identifier: CC0-1.0
libcamera_sources += files([
- 'dma_heaps.cpp',
'vc4.cpp',
])
diff --git a/src/libcamera/pipeline/rpi/vc4/vc4.cpp b/src/libcamera/pipeline/rpi/vc4/vc4.cpp
index 26102ea7..3a42e75e 100644
--- a/src/libcamera/pipeline/rpi/vc4/vc4.cpp
+++ b/src/libcamera/pipeline/rpi/vc4/vc4.cpp
@@ -12,12 +12,11 @@
#include <libcamera/formats.h>
#include "libcamera/internal/device_enumerator.h"
+#include "libcamera/internal/dma_heaps.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, 4> isp_;
/* DMAHEAP allocation helper. */
- RPi::DmaHeap dmaHeap_;
+ DmaHeap dmaHeap_;
SharedFD lsTable_;
struct Config {
--
2.43.2
