[PATCH v4 4/7] drm/panfrost: Add the ability to create submit queues
Boris Brezillon
boris.brezillon at collabora.com
Mon Jul 5 08:29:47 UTC 2021
Needed to keep VkQueues isolated from each other.
v4:
* Make panfrost_ioctl_create_submitqueue() return the queue ID
instead of a queue object
v3:
* Limit the number of submitqueue per context to 16
* Fix a deadlock
Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>
---
drivers/gpu/drm/panfrost/Makefile | 3 +-
drivers/gpu/drm/panfrost/panfrost_device.h | 2 +-
drivers/gpu/drm/panfrost/panfrost_drv.c | 69 ++++++++-
drivers/gpu/drm/panfrost/panfrost_job.c | 47 ++-----
drivers/gpu/drm/panfrost/panfrost_job.h | 9 +-
.../gpu/drm/panfrost/panfrost_submitqueue.c | 132 ++++++++++++++++++
.../gpu/drm/panfrost/panfrost_submitqueue.h | 26 ++++
include/uapi/drm/panfrost_drm.h | 17 +++
8 files changed, 260 insertions(+), 45 deletions(-)
create mode 100644 drivers/gpu/drm/panfrost/panfrost_submitqueue.c
create mode 100644 drivers/gpu/drm/panfrost/panfrost_submitqueue.h
diff --git a/drivers/gpu/drm/panfrost/Makefile b/drivers/gpu/drm/panfrost/Makefile
index b71935862417..e99192b66ec9 100644
--- a/drivers/gpu/drm/panfrost/Makefile
+++ b/drivers/gpu/drm/panfrost/Makefile
@@ -9,6 +9,7 @@ panfrost-y := \
panfrost_gpu.o \
panfrost_job.o \
panfrost_mmu.o \
- panfrost_perfcnt.o
+ panfrost_perfcnt.o \
+ panfrost_submitqueue.o
obj-$(CONFIG_DRM_PANFROST) += panfrost.o
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
index 8b25278f34c8..51c0ba4e50f5 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -137,7 +137,7 @@ struct panfrost_mmu {
struct panfrost_file_priv {
struct panfrost_device *pfdev;
- struct drm_sched_entity sched_entity[NUM_JOB_SLOTS];
+ struct idr queues;
struct panfrost_mmu *mmu;
};
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index b6b5997c9366..8e28ef30310b 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -19,6 +19,7 @@
#include "panfrost_job.h"
#include "panfrost_gpu.h"
#include "panfrost_perfcnt.h"
+#include "panfrost_submitqueue.h"
static bool unstable_ioctls;
module_param_unsafe(unstable_ioctls, bool, 0600);
@@ -250,6 +251,7 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
struct panfrost_device *pfdev = dev->dev_private;
struct drm_panfrost_submit *args = data;
struct drm_syncobj *sync_out = NULL;
+ struct panfrost_submitqueue *queue;
struct panfrost_job *job;
int ret = 0;
@@ -259,10 +261,16 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
return -EINVAL;
+ queue = panfrost_submitqueue_get(file->driver_priv, 0);
+ if (IS_ERR(queue))
+ return PTR_ERR(queue);
+
if (args->out_sync > 0) {
sync_out = drm_syncobj_find(file, args->out_sync);
- if (!sync_out)
- return -ENODEV;
+ if (!sync_out) {
+ ret = -ENODEV;
+ goto fail_put_queue;
+ }
}
job = kzalloc(sizeof(*job), GFP_KERNEL);
@@ -289,7 +297,7 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
if (ret)
goto fail_job;
- ret = panfrost_job_push(job);
+ ret = panfrost_job_push(queue, job);
if (ret)
goto fail_job;
@@ -302,6 +310,8 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
fail_out_sync:
if (sync_out)
drm_syncobj_put(sync_out);
+fail_put_queue:
+ panfrost_submitqueue_put(queue);
return ret;
}
@@ -451,6 +461,36 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
return ret;
}
+static int
+panfrost_ioctl_create_submitqueue(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct panfrost_file_priv *priv = file_priv->driver_priv;
+ struct drm_panfrost_create_submitqueue *args = data;
+ int ret;
+
+ ret = panfrost_submitqueue_create(priv, args->priority, args->flags);
+ if (ret < 0)
+ return ret;
+
+ args->id = ret;
+ return 0;
+}
+
+static int
+panfrost_ioctl_destroy_submitqueue(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct panfrost_file_priv *priv = file_priv->driver_priv;
+ u32 id = *((u32 *)data);
+
+ /* Default queue can't be destroyed. */
+ if (!id)
+ return -ENOENT;
+
+ return panfrost_submitqueue_destroy(priv, id);
+}
+
int panfrost_unstable_ioctl_check(void)
{
if (!unstable_ioctls)
@@ -479,13 +519,22 @@ panfrost_open(struct drm_device *dev, struct drm_file *file)
goto err_free;
}
- ret = panfrost_job_open(panfrost_priv);
+ idr_init(&panfrost_priv->queues);
+
+ ret = panfrost_submitqueue_create(panfrost_priv,
+ PANFROST_SUBMITQUEUE_PRIORITY_MEDIUM,
+ 0);
+
+ /* We expect the default queue to get id 0, a positive queue id is
+ * considered a failure in that case.
+ */
if (ret)
- goto err_job;
+ goto err_destroy_idr;
return 0;
-err_job:
+err_destroy_idr:
+ idr_destroy(&panfrost_priv->queues);
panfrost_mmu_ctx_put(panfrost_priv->mmu);
err_free:
kfree(panfrost_priv);
@@ -496,11 +545,15 @@ static void
panfrost_postclose(struct drm_device *dev, struct drm_file *file)
{
struct panfrost_file_priv *panfrost_priv = file->driver_priv;
+ u32 id;
panfrost_perfcnt_close(file);
- panfrost_job_close(panfrost_priv);
+
+ for (id = 0; idr_get_next(&panfrost_priv->queues, &id); id++)
+ panfrost_submitqueue_destroy(panfrost_priv, id);
panfrost_mmu_ctx_put(panfrost_priv->mmu);
+ idr_destroy(&panfrost_priv->queues);
kfree(panfrost_priv);
}
@@ -517,6 +570,8 @@ static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW),
PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW),
PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW),
+ PANFROST_IOCTL(CREATE_SUBMITQUEUE, create_submitqueue, DRM_RENDER_ALLOW),
+ PANFROST_IOCTL(DESTROY_SUBMITQUEUE, destroy_submitqueue, DRM_RENDER_ALLOW),
};
DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
index 152245b122be..56ae89272e19 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -20,6 +20,7 @@
#include "panfrost_regs.h"
#include "panfrost_gpu.h"
#include "panfrost_mmu.h"
+#include "panfrost_submitqueue.h"
#define JOB_TIMEOUT_MS 500
@@ -276,15 +277,15 @@ static void panfrost_attach_object_fences(struct panfrost_job *job)
}
}
-int panfrost_job_push(struct panfrost_job *job)
+int panfrost_job_push(struct panfrost_submitqueue *queue,
+ struct panfrost_job *job)
{
struct panfrost_device *pfdev = job->pfdev;
int slot = panfrost_job_get_slot(job);
- struct drm_sched_entity *entity = &job->file_priv->sched_entity[slot];
+ struct drm_sched_entity *entity = &queue->sched_entity[slot];
struct ww_acquire_ctx acquire_ctx;
int ret = 0;
-
ret = drm_gem_lock_reservations(job->bos, job->bo_count,
&acquire_ctx);
if (ret)
@@ -881,43 +882,18 @@ void panfrost_job_fini(struct panfrost_device *pfdev)
destroy_workqueue(pfdev->reset.wq);
}
-int panfrost_job_open(struct panfrost_file_priv *panfrost_priv)
+void panfrost_job_kill_queue(struct panfrost_submitqueue *queue)
{
- struct panfrost_device *pfdev = panfrost_priv->pfdev;
- struct panfrost_job_slot *js = pfdev->js;
- struct drm_gpu_scheduler *sched;
- int ret, i;
+ struct panfrost_device *pfdev = queue->pfdev;
+ int i, j;
- for (i = 0; i < NUM_JOB_SLOTS; i++) {
- sched = &js->queue[i].sched;
- ret = drm_sched_entity_init(&panfrost_priv->sched_entity[i],
- DRM_SCHED_PRIORITY_NORMAL, &sched,
- 1, NULL);
- if (WARN_ON(ret))
- return ret;
- }
- return 0;
-}
-
-void panfrost_job_close(struct panfrost_file_priv *panfrost_priv)
-{
- struct panfrost_device *pfdev = panfrost_priv->pfdev;
- int i;
-
- for (i = 0; i < NUM_JOB_SLOTS; i++)
- drm_sched_entity_destroy(&panfrost_priv->sched_entity[i]);
-
- /* Kill in-flight jobs */
spin_lock(&pfdev->js->job_lock);
for (i = 0; i < NUM_JOB_SLOTS; i++) {
- struct drm_sched_entity *entity = &panfrost_priv->sched_entity[i];
- int j;
-
for (j = ARRAY_SIZE(pfdev->jobs[0]) - 1; j >= 0; j--) {
struct panfrost_job *job = pfdev->jobs[i][j];
u32 cmd;
- if (!job || job->base.entity != entity)
+ if (!job || job->base.entity != &queue->sched_entity[i])
continue;
if (j == 1) {
@@ -936,7 +912,6 @@ void panfrost_job_close(struct panfrost_file_priv *panfrost_priv)
} else {
cmd = JS_COMMAND_HARD_STOP;
}
-
job_write(pfdev, JS_COMMAND(i), cmd);
}
}
@@ -956,3 +931,9 @@ int panfrost_job_is_idle(struct panfrost_device *pfdev)
return true;
}
+
+struct drm_gpu_scheduler *
+panfrost_job_get_sched(struct panfrost_device *pfdev, unsigned int js)
+{
+ return &pfdev->js->queue[js].sched;
+}
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.h b/drivers/gpu/drm/panfrost/panfrost_job.h
index 1cbc3621b663..5c228bb431c0 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.h
+++ b/drivers/gpu/drm/panfrost/panfrost_job.h
@@ -10,6 +10,7 @@
struct panfrost_device;
struct panfrost_gem_object;
struct panfrost_file_priv;
+struct panfrost_submitqueue;
struct panfrost_job {
struct drm_sched_job base;
@@ -41,11 +42,13 @@ struct panfrost_job {
int panfrost_job_init(struct panfrost_device *pfdev);
void panfrost_job_fini(struct panfrost_device *pfdev);
-int panfrost_job_open(struct panfrost_file_priv *panfrost_priv);
-void panfrost_job_close(struct panfrost_file_priv *panfrost_priv);
-int panfrost_job_push(struct panfrost_job *job);
+int panfrost_job_push(struct panfrost_submitqueue *queue,
+ struct panfrost_job *job);
void panfrost_job_put(struct panfrost_job *job);
void panfrost_job_enable_interrupts(struct panfrost_device *pfdev);
int panfrost_job_is_idle(struct panfrost_device *pfdev);
+void panfrost_job_kill_queue(struct panfrost_submitqueue *queue);
+struct drm_gpu_scheduler *
+panfrost_job_get_sched(struct panfrost_device *pfdev, unsigned int js);
#endif
diff --git a/drivers/gpu/drm/panfrost/panfrost_submitqueue.c b/drivers/gpu/drm/panfrost/panfrost_submitqueue.c
new file mode 100644
index 000000000000..8944b4410be3
--- /dev/null
+++ b/drivers/gpu/drm/panfrost/panfrost_submitqueue.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright 2021 Collabora ltd. */
+
+#include <linux/idr.h>
+
+#include "panfrost_device.h"
+#include "panfrost_job.h"
+#include "panfrost_submitqueue.h"
+
+#define PAN_MAX_SUBMITQUEUES 16
+
+static enum drm_sched_priority
+to_sched_prio(enum panfrost_submitqueue_priority priority)
+{
+ switch (priority) {
+ case PANFROST_SUBMITQUEUE_PRIORITY_LOW:
+ return DRM_SCHED_PRIORITY_MIN;
+ case PANFROST_SUBMITQUEUE_PRIORITY_MEDIUM:
+ return DRM_SCHED_PRIORITY_NORMAL;
+ case PANFROST_SUBMITQUEUE_PRIORITY_HIGH:
+ return DRM_SCHED_PRIORITY_HIGH;
+ default:
+ break;
+ }
+
+ return DRM_SCHED_PRIORITY_UNSET;
+}
+
+static void
+panfrost_submitqueue_cleanup(struct kref *ref)
+{
+ struct panfrost_submitqueue *queue;
+ unsigned int i;
+
+ queue = container_of(ref, struct panfrost_submitqueue, refcount);
+
+ for (i = 0; i < NUM_JOB_SLOTS; i++)
+ drm_sched_entity_destroy(&queue->sched_entity[i]);
+
+ /* Kill in-flight jobs */
+ panfrost_job_kill_queue(queue);
+
+ kfree(queue);
+}
+
+void panfrost_submitqueue_put(struct panfrost_submitqueue *queue)
+{
+ if (!IS_ERR_OR_NULL(queue))
+ kref_put(&queue->refcount, panfrost_submitqueue_cleanup);
+}
+
+int
+panfrost_submitqueue_create(struct panfrost_file_priv *ctx,
+ enum panfrost_submitqueue_priority priority,
+ u32 flags)
+{
+ struct panfrost_submitqueue *queue;
+ enum drm_sched_priority sched_prio;
+ int ret, i;
+
+ if (flags || priority >= PANFROST_SUBMITQUEUE_PRIORITY_COUNT)
+ return -EINVAL;
+
+ queue = kzalloc(sizeof(*queue), GFP_KERNEL);
+ if (!queue)
+ return -ENOMEM;
+
+ queue->pfdev = ctx->pfdev;
+ sched_prio = to_sched_prio(priority);
+ for (i = 0; i < NUM_JOB_SLOTS; i++) {
+ struct drm_gpu_scheduler *sched;
+
+ sched = panfrost_job_get_sched(ctx->pfdev, i);
+ ret = drm_sched_entity_init(&queue->sched_entity[i],
+ sched_prio, &sched, 1, NULL);
+ if (ret)
+ break;
+ }
+
+ if (ret) {
+ for (i--; i >= 0; i--)
+ drm_sched_entity_destroy(&queue->sched_entity[i]);
+
+ return ret;
+ }
+
+ kref_init(&queue->refcount);
+
+ idr_preload(GFP_KERNEL);
+ idr_lock(&ctx->queues);
+ ret = idr_alloc(&ctx->queues, queue, 0, PAN_MAX_SUBMITQUEUES,
+ GFP_NOWAIT);
+ idr_unlock(&ctx->queues);
+ idr_preload_end();
+
+ if (ret < 0)
+ panfrost_submitqueue_put(queue);
+
+ return ret;
+}
+
+int panfrost_submitqueue_destroy(struct panfrost_file_priv *ctx, u32 id)
+{
+ struct panfrost_submitqueue *queue;
+
+ idr_lock(&ctx->queues);
+ queue = idr_remove(&ctx->queues, id);
+ idr_unlock(&ctx->queues);
+
+ if (!queue)
+ return -ENOENT;
+
+ panfrost_submitqueue_put(queue);
+ return 0;
+}
+
+struct panfrost_submitqueue *
+panfrost_submitqueue_get(struct panfrost_file_priv *ctx, u32 id)
+{
+ struct panfrost_submitqueue *queue;
+
+ idr_lock(&ctx->queues);
+ queue = idr_find(&ctx->queues, id);
+ if (queue)
+ kref_get(&queue->refcount);
+ idr_unlock(&ctx->queues);
+
+ if (!queue)
+ return ERR_PTR(-ENOENT);
+
+ return queue;
+}
diff --git a/drivers/gpu/drm/panfrost/panfrost_submitqueue.h b/drivers/gpu/drm/panfrost/panfrost_submitqueue.h
new file mode 100644
index 000000000000..ade224725844
--- /dev/null
+++ b/drivers/gpu/drm/panfrost/panfrost_submitqueue.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright 2032 Collabora ltd. */
+
+#ifndef __PANFROST_SUBMITQUEUE_H__
+#define __PANFROST_SUBMITQUEUE_H__
+
+#include <drm/panfrost_drm.h>
+
+struct panfrost_submitqueue {
+ struct kref refcount;
+ struct panfrost_device *pfdev;
+ struct drm_sched_entity sched_entity[NUM_JOB_SLOTS];
+};
+
+struct panfrost_file_priv;
+
+int
+panfrost_submitqueue_create(struct panfrost_file_priv *ctx,
+ enum panfrost_submitqueue_priority priority,
+ u32 flags);
+int panfrost_submitqueue_destroy(struct panfrost_file_priv *ctx, u32 id);
+struct panfrost_submitqueue *
+panfrost_submitqueue_get(struct panfrost_file_priv *ctx, u32 id);
+void panfrost_submitqueue_put(struct panfrost_submitqueue *queue);
+
+#endif
diff --git a/include/uapi/drm/panfrost_drm.h b/include/uapi/drm/panfrost_drm.h
index 3723c9d231b5..e31a22c176d9 100644
--- a/include/uapi/drm/panfrost_drm.h
+++ b/include/uapi/drm/panfrost_drm.h
@@ -21,6 +21,8 @@ extern "C" {
#define DRM_PANFROST_PERFCNT_ENABLE 0x06
#define DRM_PANFROST_PERFCNT_DUMP 0x07
#define DRM_PANFROST_MADVISE 0x08
+#define DRM_PANFROST_CREATE_SUBMITQUEUE 0x09
+#define DRM_PANFROST_DESTROY_SUBMITQUEUE 0x0a
#define DRM_IOCTL_PANFROST_SUBMIT DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_SUBMIT, struct drm_panfrost_submit)
#define DRM_IOCTL_PANFROST_WAIT_BO DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_WAIT_BO, struct drm_panfrost_wait_bo)
@@ -29,6 +31,8 @@ extern "C" {
#define DRM_IOCTL_PANFROST_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_GET_PARAM, struct drm_panfrost_get_param)
#define DRM_IOCTL_PANFROST_GET_BO_OFFSET DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_GET_BO_OFFSET, struct drm_panfrost_get_bo_offset)
#define DRM_IOCTL_PANFROST_MADVISE DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_MADVISE, struct drm_panfrost_madvise)
+#define DRM_IOCTL_PANFROST_CREATE_SUBMITQUEUE DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_CREATE_SUBMITQUEUE, struct drm_panfrost_create_submitqueue)
+#define DRM_IOCTL_PANFROST_DESTROY_SUBMITQUEUE DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_DESTROY_SUBMITQUEUE, __u32)
/*
* Unstable ioctl(s): only exposed when the unsafe unstable_ioctls module
@@ -224,6 +228,19 @@ struct drm_panfrost_madvise {
__u32 retained; /* out, whether backing store still exists */
};
+enum panfrost_submitqueue_priority {
+ PANFROST_SUBMITQUEUE_PRIORITY_LOW = 0,
+ PANFROST_SUBMITQUEUE_PRIORITY_MEDIUM,
+ PANFROST_SUBMITQUEUE_PRIORITY_HIGH,
+ PANFROST_SUBMITQUEUE_PRIORITY_COUNT,
+};
+
+struct drm_panfrost_create_submitqueue {
+ __u32 flags; /* in, PANFROST_SUBMITQUEUE_x */
+ __u32 priority; /* in, enum panfrost_submitqueue_priority */
+ __u32 id; /* out, identifier */
+};
+
/* Exclusive (AKA write) access to the BO */
#define PANFROST_BO_REF_EXCLUSIVE 0x1
--
2.31.1
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