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Message-Id: <20220328035951.1817417-5-tjmercier@google.com>
Date: Mon, 28 Mar 2022 03:59:43 +0000
From: "T.J. Mercier" <tjmercier@...gle.com>
To: tjmercier@...gle.com, David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
Jonathan Corbet <corbet@....net>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Arve Hjønnevåg" <arve@...roid.com>,
Todd Kjos <tkjos@...roid.com>,
Martijn Coenen <maco@...roid.com>,
Joel Fernandes <joel@...lfernandes.org>,
Christian Brauner <brauner@...nel.org>,
Hridya Valsaraju <hridya@...gle.com>,
Suren Baghdasaryan <surenb@...gle.com>,
Sumit Semwal <sumit.semwal@...aro.org>,
"Christian König" <christian.koenig@....com>,
Benjamin Gaignard <benjamin.gaignard@...aro.org>,
Liam Mark <lmark@...eaurora.org>,
Laura Abbott <labbott@...hat.com>,
Brian Starkey <Brian.Starkey@....com>,
John Stultz <john.stultz@...aro.org>,
Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
Johannes Weiner <hannes@...xchg.org>,
Shuah Khan <shuah@...nel.org>
Cc: kaleshsingh@...gle.com, Kenny.Ho@....com, mkoutny@...e.com,
skhan@...uxfoundation.org, dri-devel@...ts.freedesktop.org,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org,
cgroups@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [RFC v4 4/8] dmabuf: heaps: export system_heap buffers with GPU
cgroup charging
From: Hridya Valsaraju <hridya@...gle.com>
All DMA heaps now register a new GPU cgroup device upon creation, and the
system_heap now exports buffers associated with its GPU cgroup device for
tracking purposes.
Signed-off-by: Hridya Valsaraju <hridya@...gle.com>
Signed-off-by: T.J. Mercier <tjmercier@...gle.com>
---
v3 changes
Use more common dual author commit message format per John Stultz.
v2 changes
Move dma-buf cgroup charge transfer from a dma_buf_op defined by every
heap to a single dma-buf function for all heaps per Daniel Vetter and
Christian König.
---
drivers/dma-buf/dma-heap.c | 27 +++++++++++++++++++++++++++
drivers/dma-buf/heaps/system_heap.c | 3 +++
include/linux/dma-heap.h | 11 +++++++++++
3 files changed, 41 insertions(+)
diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index 8f5848aa144f..885072427775 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c
@@ -7,6 +7,7 @@
*/
#include <linux/cdev.h>
+#include <linux/cgroup_gpu.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/dma-buf.h>
@@ -31,6 +32,7 @@
* @heap_devt heap device node
* @list list head connecting to list of heaps
* @heap_cdev heap char device
+ * @gpucg_dev gpu cgroup device for memory accounting
*
* Represents a heap of memory from which buffers can be made.
*/
@@ -41,6 +43,9 @@ struct dma_heap {
dev_t heap_devt;
struct list_head list;
struct cdev heap_cdev;
+#ifdef CONFIG_CGROUP_GPU
+ struct gpucg_device gpucg_dev;
+#endif
};
static LIST_HEAD(heap_list);
@@ -216,6 +221,26 @@ const char *dma_heap_get_name(struct dma_heap *heap)
return heap->name;
}
+#ifdef CONFIG_CGROUP_GPU
+/**
+ * dma_heap_get_gpucg_dev() - get struct gpucg_device for the heap.
+ * @heap: DMA-Heap to get the gpucg_device struct for.
+ *
+ * Returns:
+ * The gpucg_device struct for the heap. NULL if the GPU cgroup controller is
+ * not enabled.
+ */
+struct gpucg_device *dma_heap_get_gpucg_dev(struct dma_heap *heap)
+{
+ return &heap->gpucg_dev;
+}
+#else /* CONFIG_CGROUP_GPU */
+struct gpucg_device *dma_heap_get_gpucg_dev(struct dma_heap *heap)
+{
+ return NULL;
+}
+#endif /* CONFIG_CGROUP_GPU */
+
struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
{
struct dma_heap *heap, *h, *err_ret;
@@ -288,6 +313,8 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
list_add(&heap->list, &heap_list);
mutex_unlock(&heap_list_lock);
+ gpucg_register_device(dma_heap_get_gpucg_dev(heap), exp_info->name);
+
return heap;
err2:
diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c
index ab7fd896d2c4..752a05c3cfe2 100644
--- a/drivers/dma-buf/heaps/system_heap.c
+++ b/drivers/dma-buf/heaps/system_heap.c
@@ -395,6 +395,9 @@ static struct dma_buf *system_heap_allocate(struct dma_heap *heap,
exp_info.ops = &system_heap_buf_ops;
exp_info.size = buffer->len;
exp_info.flags = fd_flags;
+#ifdef CONFIG_CGROUP_GPU
+ exp_info.gpucg_dev = dma_heap_get_gpucg_dev(heap);
+#endif
exp_info.priv = buffer;
dmabuf = dma_buf_export(&exp_info);
if (IS_ERR(dmabuf)) {
diff --git a/include/linux/dma-heap.h b/include/linux/dma-heap.h
index 0c05561cad6e..e447a61d054e 100644
--- a/include/linux/dma-heap.h
+++ b/include/linux/dma-heap.h
@@ -10,6 +10,7 @@
#define _DMA_HEAPS_H
#include <linux/cdev.h>
+#include <linux/cgroup_gpu.h>
#include <linux/types.h>
struct dma_heap;
@@ -59,6 +60,16 @@ void *dma_heap_get_drvdata(struct dma_heap *heap);
*/
const char *dma_heap_get_name(struct dma_heap *heap);
+/**
+ * dma_heap_get_gpucg_dev() - get a pointer to the struct gpucg_device for the
+ * heap.
+ * @heap: DMA-Heap to retrieve gpucg_device for.
+ *
+ * Returns:
+ * The gpucg_device struct for the heap.
+ */
+struct gpucg_device *dma_heap_get_gpucg_dev(struct dma_heap *heap);
+
/**
* dma_heap_add - adds a heap to dmabuf heaps
* @exp_info: information needed to register this heap
--
2.35.1.1021.g381101b075-goog
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