[PATCH v4 01/13] drm/msm: Docs and misc cleanup

Rob Clark
2021-07-28T01:02:33Z

From: Rob Clark <robdclark@chromium.org>

Fix a couple incorrect or misspelt comments, and add submitqueue doc
comment.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/msm/msm_gem.h | 3 +--
drivers/gpu/drm/msm/msm_gem_submit.c | 1 +
drivers/gpu/drm/msm/msm_gpu.h | 15 +++++++++++++++
drivers/gpu/drm/msm/msm_ringbuffer.c | 2 +-
drivers/gpu/drm/msm/msm_submitqueue.c | 9 +++++----
5 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h
index 405f8411e395..d69fcb37ce17 100644
--- a/drivers/gpu/drm/msm/msm_gem.h
+++ b/drivers/gpu/drm/msm/msm_gem.h
@@ -313,8 +313,7 @@ void msm_gem_vunmap(struct drm_gem_object *obj);

/* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
* associated with the cmdstream submission for synchronization (and
- * make it easier to unwind when things go wrong, etc). This only
- * lasts for the duration of the submit-ioctl.
+ * make it easier to unwind when things go wrong, etc).
*/
struct msm_gem_submit {
struct kref ref;
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 44f84bfd0c0e..6d46f9275a40 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -655,6 +655,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
bool has_ww_ticket = false;
unsigned i;
int ret, submitid;
+
if (!gpu)
return -ENXIO;

diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index 710c3fedfbf3..96efcb31e502 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -250,6 +250,21 @@ struct msm_gpu_perfcntr {
const char *name;
};

+/**
+ * A submitqueue is associated with a gl context or vk queue (or equiv)
+ * in userspace.
+ *
+ * @id: userspace id for the submitqueue, unique within the drm_file
+ * @flags: userspace flags for the submitqueue, specified at creation
+ * (currently unusued)
+ * @prio: the submitqueue priority
+ * @faults: the number of GPU hangs associated with this submitqueue
+ * @ctx: the per-drm_file context associated with the submitqueue (ie.
+ * which set of pgtables do submits jobs associated with the
+ * submitqueue use)
+ * @node: node in the context's list of submitqueues
+ * @ref: reference count
+ */
struct msm_gpu_submitqueue {
int id;
u32 flags;
diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c b/drivers/gpu/drm/msm/msm_ringbuffer.c
index 7e92d9532454..054461662af5 100644
--- a/drivers/gpu/drm/msm/msm_ringbuffer.c
+++ b/drivers/gpu/drm/msm/msm_ringbuffer.c
@@ -32,7 +32,7 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,

if (IS_ERR(ring->start)) {
ret = PTR_ERR(ring->start);
- ring->start = 0;
+ ring->start = NULL;
goto fail;
}

diff --git a/drivers/gpu/drm/msm/msm_submitqueue.c b/drivers/gpu/drm/msm/msm_submitqueue.c
index c3d206105d28..e5eef11ed014 100644
--- a/drivers/gpu/drm/msm/msm_submitqueue.c
+++ b/drivers/gpu/drm/msm/msm_submitqueue.c
@@ -98,17 +98,18 @@ int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
return 0;
}

+/*
+ * Create the default submit-queue (id==0), used for backwards compatibility
+ * for userspace that pre-dates the introduction of submitqueues.
+ */
int msm_submitqueue_init(struct drm_device *drm, struct msm_file_private *ctx)
{
struct msm_drm_private *priv = drm->dev_private;
int default_prio;

- if (!ctx)
- return 0;
-
/*
* Select priority 2 as the "default priority" unless nr_rings is less
- * than 2 and then pick the lowest pirority
+ * than 2 and then pick the lowest priority
*/
default_prio = priv->gpu ?
clamp_t(uint32_t, 2, 0, priv->gpu->nr_rings - 1) : 0;
--
2.31.1