Re: [PATCH drm-misc-next v7 1/7] drm/gpuvm: convert WARN() to drm_WARN() variants
From: Danilo Krummrich
Date: Tue Oct 31 2023 - 12:48:42 EST
On 10/31/23 11:08, Thomas Hellström wrote:
On Mon, 2023-10-23 at 22:16 +0200, Danilo Krummrich wrote:
Use drm_WARN() and drm_WARN_ON() variants to indicate drivers the
context the failing VM resides in.
Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
---
drivers/gpu/drm/drm_gpuvm.c | 32 ++++++++++++++----------
--
drivers/gpu/drm/nouveau/nouveau_uvmm.c | 3 ++-
include/drm/drm_gpuvm.h | 7 ++++++
3 files changed, 26 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/drm_gpuvm.c
b/drivers/gpu/drm/drm_gpuvm.c
index 08c088319652..d7367a202fee 100644
--- a/drivers/gpu/drm/drm_gpuvm.c
+++ b/drivers/gpu/drm/drm_gpuvm.c
@@ -614,12 +614,12 @@ static int __drm_gpuva_insert(struct drm_gpuvm
*gpuvm,
static void __drm_gpuva_remove(struct drm_gpuva *va);
static bool
-drm_gpuvm_check_overflow(u64 addr, u64 range)
+drm_gpuvm_check_overflow(struct drm_gpuvm *gpuvm, u64 addr, u64
range)
{
u64 end;
- return WARN(check_add_overflow(addr, range, &end),
- "GPUVA address limited to %zu bytes.\n",
sizeof(end));
+ return drm_WARN(gpuvm->drm, check_add_overflow(addr, range,
&end),
+ "GPUVA address limited to %zu bytes.\n",
sizeof(end));
}
static bool
@@ -647,7 +647,7 @@ static bool
drm_gpuvm_range_valid(struct drm_gpuvm *gpuvm,
u64 addr, u64 range)
{
- return !drm_gpuvm_check_overflow(addr, range) &&
+ return !drm_gpuvm_check_overflow(gpuvm, addr, range) &&
drm_gpuvm_in_mm_range(gpuvm, addr, range) &&
!drm_gpuvm_in_kernel_node(gpuvm, addr, range);
}
@@ -656,6 +656,7 @@ drm_gpuvm_range_valid(struct drm_gpuvm *gpuvm,
* drm_gpuvm_init() - initialize a &drm_gpuvm
* @gpuvm: pointer to the &drm_gpuvm to initialize
* @name: the name of the GPU VA space
+ * @drm: the &drm_device this VM resides in
* @start_offset: the start offset of the GPU VA space
* @range: the size of the GPU VA space
* @reserve_offset: the start of the kernel reserved GPU VA area
@@ -668,8 +669,8 @@ drm_gpuvm_range_valid(struct drm_gpuvm *gpuvm,
* &name is expected to be managed by the surrounding driver
structures.
*/
void
-drm_gpuvm_init(struct drm_gpuvm *gpuvm,
- const char *name,
+drm_gpuvm_init(struct drm_gpuvm *gpuvm, const char *name,
+ struct drm_device *drm,
u64 start_offset, u64 range,
u64 reserve_offset, u64 reserve_range,
const struct drm_gpuvm_ops *ops)
@@ -677,20 +678,20 @@ drm_gpuvm_init(struct drm_gpuvm *gpuvm,
gpuvm->rb.tree = RB_ROOT_CACHED;
INIT_LIST_HEAD(&gpuvm->rb.list);
- drm_gpuvm_check_overflow(start_offset, range);
- gpuvm->mm_start = start_offset;
- gpuvm->mm_range = range;
-
gpuvm->name = name ? name : "unknown";
gpuvm->ops = ops;
+ gpuvm->drm = drm;
- memset(&gpuvm->kernel_alloc_node, 0, sizeof(struct
drm_gpuva));
+ drm_gpuvm_check_overflow(gpuvm, start_offset, range);
+ gpuvm->mm_start = start_offset;
+ gpuvm->mm_range = range;
+ memset(&gpuvm->kernel_alloc_node, 0, sizeof(struct
drm_gpuva));
if (reserve_range) {
gpuvm->kernel_alloc_node.va.addr = reserve_offset;
gpuvm->kernel_alloc_node.va.range = reserve_range;
- if (likely(!drm_gpuvm_check_overflow(reserve_offset,
+ if (likely(!drm_gpuvm_check_overflow(gpuvm,
reserve_offset,
reserve_range)))
__drm_gpuva_insert(gpuvm, &gpuvm-
kernel_alloc_node);
}
@@ -712,8 +713,8 @@ drm_gpuvm_destroy(struct drm_gpuvm *gpuvm)
if (gpuvm->kernel_alloc_node.va.range)
__drm_gpuva_remove(&gpuvm->kernel_alloc_node);
- WARN(!RB_EMPTY_ROOT(&gpuvm->rb.tree.rb_root),
- "GPUVA tree is not empty, potentially leaking memory.");
+ drm_WARN(gpuvm->drm, !RB_EMPTY_ROOT(&gpuvm->rb.tree.rb_root),
+ "GPUVA tree is not empty, potentially leaking
memory.\n");
}
EXPORT_SYMBOL_GPL(drm_gpuvm_destroy);
@@ -795,7 +796,8 @@ drm_gpuva_remove(struct drm_gpuva *va)
struct drm_gpuvm *gpuvm = va->vm;
if (unlikely(va == &gpuvm->kernel_alloc_node)) {
- WARN(1, "Can't destroy kernel reserved node.\n");
+ drm_WARN(gpuvm->drm, 1,
+ "Can't destroy kernel reserved node.\n");
return;
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_uvmm.c
b/drivers/gpu/drm/nouveau/nouveau_uvmm.c
index 5cf892c50f43..aaf5d28bd587 100644
--- a/drivers/gpu/drm/nouveau/nouveau_uvmm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_uvmm.c
@@ -1808,6 +1808,7 @@ int
nouveau_uvmm_init(struct nouveau_uvmm *uvmm, struct nouveau_cli
*cli,
u64 kernel_managed_addr, u64 kernel_managed_size)
{
+ struct drm_device *drm = cli->drm->dev;
int ret;
u64 kernel_managed_end = kernel_managed_addr +
kernel_managed_size;
@@ -1836,7 +1837,7 @@ nouveau_uvmm_init(struct nouveau_uvmm *uvmm,
struct nouveau_cli *cli,
uvmm->kernel_managed_addr = kernel_managed_addr;
uvmm->kernel_managed_size = kernel_managed_size;
- drm_gpuvm_init(&uvmm->base, cli->name,
+ drm_gpuvm_init(&uvmm->base, cli->name, drm,
NOUVEAU_VA_SPACE_START,
NOUVEAU_VA_SPACE_END,
kernel_managed_addr, kernel_managed_size,
diff --git a/include/drm/drm_gpuvm.h b/include/drm/drm_gpuvm.h
index bdfafc4a7705..687fd5893624 100644
--- a/include/drm/drm_gpuvm.h
+++ b/include/drm/drm_gpuvm.h
@@ -29,6 +29,7 @@
#include <linux/rbtree.h>
#include <linux/types.h>
+#include <drm/drm_device.h>
#include <drm/drm_gem.h>
struct drm_gpuvm;
@@ -201,6 +202,11 @@ struct drm_gpuvm {
*/
const char *name;
+ /**
+ * @drm: the &drm_device this VM lives in
+ */
Could a one-liner do?
/** <comment> */
There are a few more existing ones that could be a one-liner as well and
I like consistency. If you think it's preferrable to keep those ones in
one line, I'd probably do it for all in a follow-up patch.
+ struct drm_device *drm;
+
/**
* @mm_start: start of the VA space
*/
@@ -241,6 +247,7 @@ struct drm_gpuvm {
};
void drm_gpuvm_init(struct drm_gpuvm *gpuvm, const char *name,
+ struct drm_device *drm,
u64 start_offset, u64 range,
u64 reserve_offset, u64 reserve_range,
const struct drm_gpuvm_ops *ops);
I figure Christian's commend can be addressed in a follow-up patch if
neeed.
I already addressed his comment in a local branch, I can also just add the
patch to this series.
Reviewed-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>