This should help limit the number of ioctls when submitting multiple
jobs. The new ioctl also supports syncobj timelines and BO access flags.
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
---
drivers/gpu/drm/panfrost/panfrost_drv.c | 303 ++++++++++++++++++++++++
include/uapi/drm/panfrost_drm.h | 79 ++++++
2 files changed, 382 insertions(+)
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index be45efee47a2..3f8addab8bab 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -446,6 +446,308 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
return ret;
}
+static int
+panfrost_get_job_in_syncs(struct drm_file *file_priv,
+ u64 refs, u32 ref_stride,
+ u32 count, struct panfrost_job *job)
+{
+ const void __user *in = u64_to_user_ptr(refs);
+ unsigned int i;
+ int ret;
+
+ if (!count)
+ return 0;
+
+ for (i = 0; i < count; i++) {
+ struct drm_panfrost_syncobj_ref ref = { };
+ struct dma_fence *fence;
+
+ ret = copy_struct_from_user(&ref, sizeof(ref),
+ in + (i * ref_stride),
+ ref_stride);
+ if (ret)
+ return ret;
+
+ if (ref.pad)
+ return -EINVAL;
+
+ ret = drm_syncobj_find_fence(file_priv, ref.handle, ref.point,
+ 0, &fence);
+ if (ret)
+ return ret;
+
+ ret = drm_gem_fence_array_add(&job->deps, fence);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+struct panfrost_job_out_sync {
+ struct drm_syncobj *syncobj;
+ struct dma_fence_chain *chain;
+ u64 point;
+};
+
+static void
+panfrost_put_job_out_syncs(struct panfrost_job_out_sync *out_syncs, u32 count)
+{
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ if (!out_syncs[i].syncobj)
+ break;
+
+ drm_syncobj_put(out_syncs[i].syncobj);
+ kvfree(out_syncs[i].chain);
+ }
+
+ kvfree(out_syncs);
+}
+
+static struct panfrost_job_out_sync *
+panfrost_get_job_out_syncs(struct drm_file *file_priv,
+ u64 refs, u32 ref_stride,
+ u32 count)
+{
+ void __user *in = u64_to_user_ptr(refs);
+ struct panfrost_job_out_sync *out_syncs;
+ unsigned int i;
+ int ret;
+
+ if (!count)
+ return NULL;
+
+ out_syncs = kvmalloc_array(count, sizeof(*out_syncs),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!out_syncs)
+ return ERR_PTR(-ENOMEM);
+
+ for (i = 0; i < count; i++) {
+ struct drm_panfrost_syncobj_ref ref = { };
+
+ ret = copy_struct_from_user(&ref, sizeof(ref),
+ in + (i * ref_stride),
+ ref_stride);
+ if (ret)
+ goto err_free_out_syncs;
+
+ if (ref.pad) {
+ ret = -EINVAL;
+ goto err_free_out_syncs;
+ }
+
+ out_syncs[i].syncobj = drm_syncobj_find(file_priv, ref.handle);
+ if (!out_syncs[i].syncobj) {
+ ret = -EINVAL;
+ goto err_free_out_syncs;
+ }
+
+ out_syncs[i].point = ref.point;
+ if (!out_syncs[i].point)
+ continue;
+
+ out_syncs[i].chain = kmalloc(sizeof(*out_syncs[i].chain),
+ GFP_KERNEL);
+ if (!out_syncs[i].chain) {
+ ret = -ENOMEM;
+ goto err_free_out_syncs;
+ }
+ }
+
+ return out_syncs;
+
+err_free_out_syncs:
+ panfrost_put_job_out_syncs(out_syncs, count);
+ return ERR_PTR(ret);
+}
+
+static void
+panfrost_set_job_out_fence(struct panfrost_job_out_sync *out_syncs,
+ unsigned int count, struct dma_fence *fence)
+{
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ if (out_syncs[i].chain) {
+ drm_syncobj_add_point(out_syncs[i].syncobj,
+ out_syncs[i].chain,
+ fence, out_syncs[i].point);
+ out_syncs[i].chain = NULL;
+ } else {
+ drm_syncobj_replace_fence(out_syncs[i].syncobj,
+ fence);
+ }
+ }
+}
+
+#define PANFROST_BO_REF_ALLOWED_FLAGS PANFROST_BO_REF_RW
+
+static int
+panfrost_get_job_bos(struct drm_file *file_priv,
+ u64 refs, u32 ref_stride, u32 count,
+ struct panfrost_job *job)
+{
+ void __user *in = u64_to_user_ptr(refs);
+ unsigned int i;
+
+ job->bo_count = count;
+
+ if (!count)
+ return 0;
+
+ job->bos = kvmalloc_array(job->bo_count, sizeof(*job->bos),
+ GFP_KERNEL | __GFP_ZERO);
+ job->bo_flags = kvmalloc_array(job->bo_count,
+ sizeof(*job->bo_flags),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!job->bos || !job->bo_flags)
+ return -ENOMEM;
+
+ for (i = 0; i < count; i++) {
+ struct drm_panfrost_bo_ref ref = { };
+ int ret;
+
+ ret = copy_struct_from_user(&ref, sizeof(ref),
+ in + (i * ref_stride),
+ ref_stride);
+ if (ret)
+ return ret;
+
+ if ((ref.flags & ~PANFROST_BO_REF_ALLOWED_FLAGS))
+ return -EINVAL;
+
+ /* We need to know the access type. */
+ if (!(ref.flags & PANFROST_BO_REF_RW))
+ return -EINVAL;
+
+ job->bos[i] = drm_gem_object_lookup(file_priv, ref.handle);
+ if (!job->bos[i])
+ return -EINVAL;
+
+ job->bo_flags[i] = ref.flags;
+ }
+
+ return 0;
+}
+
+#define PANFROST_JD_ALLOWED_REQS PANFROST_JD_REQ_FS
+
+static int
+panfrost_submit_job(struct drm_device *dev, struct drm_file *file_priv,
+ const struct drm_panfrost_job *args,
+ u32 bo_stride, u32 syncobj_stride)
+{
+ struct panfrost_device *pfdev = dev->dev_private;
+ struct panfrost_job_out_sync *out_syncs;
+ struct panfrost_job *job;
+ int ret;
+
+ if (!args->head)
+ return -EINVAL;
+
+ if (args->requirements & ~PANFROST_JD_ALLOWED_REQS)
+ return -EINVAL;
+
+ job = kzalloc(sizeof(*job), GFP_KERNEL);
+ if (!job)
+ return -ENOMEM;
+
+ kref_init(&job->refcount);
+
+ job->pfdev = pfdev;
+ job->jc = args->head;
+ job->requirements = args->requirements;
+ job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
+ job->file_priv = file_priv->driver_priv;
+ xa_init_flags(&job->deps, XA_FLAGS_ALLOC);
+
+ ret = panfrost_get_job_in_syncs(file_priv,
+ args->in_syncs,
+ syncobj_stride,
+ args->in_sync_count,
+ job);
+ if (ret)
+ goto err_put_job;
+
+ out_syncs = panfrost_get_job_out_syncs(file_priv,
+ args->out_syncs,
+ syncobj_stride,
+ args->out_sync_count);
+ if (IS_ERR(out_syncs)) {
+ ret = PTR_ERR(out_syncs);
+ goto err_put_job;
+ }
+
+ ret = panfrost_get_job_bos(file_priv, args->bos, bo_stride,
+ args->bo_count, job);
+ if (ret)
+ goto err_put_job;
+
+ ret = panfrost_get_job_mappings(file_priv, job);
+ if (ret)
+ goto err_put_job;
+
+ ret = panfrost_job_push(job);
+ if (ret) {
+ panfrost_put_job_out_syncs(out_syncs, args->out_sync_count);
+ goto err_put_job;
+ }
+
+ panfrost_set_job_out_fence(out_syncs, args->out_sync_count,
+ job->render_done_fence);
+ panfrost_put_job_out_syncs(out_syncs, args->out_sync_count);
+ return 0;
+
+err_put_job:
+ panfrost_job_put(job);
+ return ret;
+}
+
+static int
+panfrost_ioctl_batch_submit(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_panfrost_batch_submit *args = data;
+ void __user *jobs_args = u64_to_user_ptr(args->jobs);
+ unsigned int i;
+ int ret;
+
+ if (args->pad)
+ return -EINVAL;
+
+ /* Relax this test if new fields are added to
+ * drm_panfrost_{bo_ref,syncobj_ref,job}.
+ */
+ if (args->job_stride < sizeof(struct drm_panfrost_job) ||
+ args->bo_ref_stride < sizeof(struct drm_panfrost_bo_ref) ||
+ args->syncobj_ref_stride < sizeof(struct drm_panfrost_syncobj_ref))
+ return -EINVAL;
+
+ for (i = 0; i < args->job_count; i++) {
+ struct drm_panfrost_job job_args = { };
+
+ ret = copy_struct_from_user(&job_args, sizeof(job_args),
+ jobs_args + (i * args->job_stride),
+ args->job_stride);
+ if (ret) {
+ args->fail_idx = i;
+ return ret;
+ }
+
+ ret = panfrost_submit_job(dev, file_priv, &job_args,
+ args->bo_ref_stride,
+ args->syncobj_ref_stride);
+ if (ret) {
+ args->fail_idx = i;
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
int panfrost_unstable_ioctl_check(void)
{
if (!unstable_ioctls)
@@ -544,6 +846,7 @@ 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(BATCH_SUBMIT, batch_submit, DRM_RENDER_ALLOW),
};
DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
diff --git a/include/uapi/drm/panfrost_drm.h b/include/uapi/drm/panfrost_drm.h
index eab96d7e0e0e..34a10dac7ade 100644
--- a/include/uapi/drm/panfrost_drm.h
+++ b/include/uapi/drm/panfrost_drm.h
@@ -21,6 +21,7 @@ extern "C" {
#define DRM_PANFROST_PERFCNT_ENABLE 0x06
#define DRM_PANFROST_PERFCNT_DUMP 0x07
#define DRM_PANFROST_MADVISE 0x08
+#define DRM_PANFROST_BATCH_SUBMIT 0x09
#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 +30,7 @@ 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_BATCH_SUBMIT DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_BATCH_SUBMIT, struct drm_panfrost_batch_submit)
/*
* Unstable ioctl(s): only exposed when the unsafe unstable_ioctls module
@@ -223,10 +225,87 @@ struct drm_panfrost_madvise {
__u32 retained; /* out, whether backing store still exists */
};
+/* Syncobj reference passed at job submission time to encode explicit
+ * input/output fences.
+ */
+struct drm_panfrost_syncobj_ref {
+ __u32 handle;
+ __u32 pad;
+ __u64 point;
+};
+
#define PANFROST_BO_REF_READ 0x1
#define PANFROST_BO_REF_WRITE 0x2
#define PANFROST_BO_REF_RW (PANFROST_BO_REF_READ | PANFROST_BO_REF_WRITE)
+/* Describes a BO referenced by a job and the type of access. */
+struct drm_panfrost_bo_ref {
+ __u32 handle;
+ __u32 flags;
+};
+
+/* Describes a GPU job and the resources attached to it. */
+struct drm_panfrost_job {
+ /** GPU pointer to the head of the job chain. */
+ __u64 head;
+
+ /**
+ * Array of drm_panfrost_bo_ref objects describing the BOs referenced
+ * by this job.
+ */
+ __u64 bos;
+
+ /**
+ * Arrays of drm_panfrost_syncobj_ref objects describing the input
+ * and output fences.
+ */
+ __u64 in_syncs;
+ __u64 out_syncs;
+
+ /** Syncobj reference array sizes. */
+ __u32 in_sync_count;
+ __u32 out_sync_count;
+
+ /** BO reference array size. */
+ __u32 bo_count;
+
+ /** Combination of PANFROST_JD_REQ_* flags. */
+ __u32 requirements;
+};
+
+/* Used to submit multiple jobs in one call */
+struct drm_panfrost_batch_submit {
+ /**
+ * Stride of the jobs array (needed to ease extension of the
+ * BATCH_SUBMIT ioctl). Should be set to
+ * sizeof(struct drm_panfrost_job).
+ */
+ __u32 job_stride;
+
+ /** Number of jobs to submit. */
+ __u32 job_count;
+
+ /* Pointer to a job array. */
+ __u64 jobs;
+
+ /**
+ * Stride of the BO and syncobj reference arrays (needed to ease
+ * extension of the BATCH_SUBMIT ioctl). Should be set to
+ * sizeof(struct drm_panfrost_bo_ref).
+ */
+ __u32 bo_ref_stride;
+ __u32 syncobj_ref_stride;
+
+ /**
+ * If the submission fails, this encodes the index of the job
+ * failed.
+ */
+ __u32 fail_idx;
+
+ /** Always 0. */
+ __u32 pad;
+};
+
#if defined(__cplusplus)
}
#endif
--
2.26.2
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