A CPU job is a type of job that performs operations that requires CPU
intervention. An indirect CSD job is a job that, when executed in the
queue, will map the indirect buffer, read the dispatch parameters, and
submit a regular dispatch. Therefore, it is a job that needs CPU
intervention.
So, create a user extension for the CPU job that enables the creation
of an indirect CSD. This user extension will allow the creation of a CSD
job linked to a CPU job. The CPU job will wait for the indirect CSD job
dependencies and, once they are signaled, it will update the CSD job
parameters.
Co-developed-by: Melissa Wen <mwen@xxxxxxxxxx>
Signed-off-by: Melissa Wen <mwen@xxxxxxxxxx>
Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
---
drivers/gpu/drm/v3d/v3d_drv.h | 31 ++++++++-
drivers/gpu/drm/v3d/v3d_sched.c | 41 +++++++++++-
drivers/gpu/drm/v3d/v3d_submit.c | 104 ++++++++++++++++++++++++++++++-
include/uapi/drm/v3d_drm.h | 43 ++++++++++++-
4 files changed, 213 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index 39d62915cdd6..202c0d4b04a5 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -316,12 +316,41 @@ struct v3d_csd_job {
struct drm_v3d_submit_csd args;
};
-enum v3d_cpu_job_type {};
+enum v3d_cpu_job_type {
+ V3D_CPU_JOB_TYPE_INDIRECT_CSD = 1,
+};
+
+struct v3d_indirect_csd_info {
+ /* Indirect CSD */
+ struct v3d_csd_job *job;
+
+ /* Clean cache job associated to the Indirect CSD job */
+ struct v3d_job *clean_job;
+
+ /* Offset within the BO where the workgroup counts are stored */
+ u32 offset;
+
+ /* Workgroups size */
+ u32 wg_size;
+
+ /* Indices of the uniforms with the workgroup dispatch counts
+ * in the uniform stream.
+ */
+ u32 wg_uniform_offsets[3];
+
+ /* Indirect BO */
+ struct drm_gem_object *indirect;
+
+ /* Context of the Indirect CSD job */
+ struct ww_acquire_ctx acquire_ctx;
+};
struct v3d_cpu_job {
struct v3d_job base;
enum v3d_cpu_job_type job_type;
+
+ struct v3d_indirect_csd_info indirect_csd;
};
typedef void (*v3d_cpu_job_fn)(struct v3d_cpu_job *);
diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c
index ebbd00840a73..597e4ec3d28d 100644
--- a/drivers/gpu/drm/v3d/v3d_sched.c
+++ b/drivers/gpu/drm/v3d/v3d_sched.c
@@ -25,6 +25,8 @@
#include "v3d_regs.h"
#include "v3d_trace.h"
+#define V3D_CSD_CFG012_WG_COUNT_SHIFT 16
+
static struct v3d_job *
to_v3d_job(struct drm_sched_job *sched_job)
{
@@ -268,7 +270,44 @@ v3d_csd_job_run(struct drm_sched_job *sched_job)
return fence;
}
-static const v3d_cpu_job_fn cpu_job_function[] = { };
+static void
+v3d_rewrite_csd_job_wg_counts_from_indirect(struct v3d_cpu_job *job)
+{
+ struct v3d_indirect_csd_info *indirect_csd = &job->indirect_csd;
+ struct v3d_bo *bo = to_v3d_bo(job->base.bo[0]);
+ struct v3d_bo *indirect = to_v3d_bo(indirect_csd->indirect);
+ struct drm_v3d_submit_csd *args = &indirect_csd->job->args;
+ u32 *wg_counts;
+
+ v3d_get_bo_vaddr(bo);
+ v3d_get_bo_vaddr(indirect);
+
+ wg_counts = (uint32_t *) (bo->vaddr + indirect_csd->offset);
+
+ if (wg_counts[0] == 0 || wg_counts[1] == 0 || wg_counts[2] == 0)
+ return;
+
+ args->cfg[0] = wg_counts[0] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
+ args->cfg[1] = wg_counts[1] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
+ args->cfg[2] = wg_counts[2] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
+ args->cfg[4] = DIV_ROUND_UP(indirect_csd->wg_size, 16) *
+ (wg_counts[0] * wg_counts[1] * wg_counts[2]) - 1;
+
+ for (int i = 0; i < 3; i++) {
+ /* 0xffffffff indicates that the uniform rewrite is not needed */
+ if (indirect_csd->wg_uniform_offsets[i] != 0xffffffff) {
+ u32 uniform_idx = indirect_csd->wg_uniform_offsets[i];
+ ((uint32_t *) indirect->vaddr)[uniform_idx] = wg_counts[i];
+ }
+ }
+
+ v3d_put_bo_vaddr(indirect);
+ v3d_put_bo_vaddr(bo);
+}
+
+static const v3d_cpu_job_fn cpu_job_function[] = {
+ [V3D_CPU_JOB_TYPE_INDIRECT_CSD] = v3d_rewrite_csd_job_wg_counts_from_indirect,
+};
static struct dma_fence *
v3d_cpu_job_run(struct drm_sched_job *sched_job)
diff --git a/drivers/gpu/drm/v3d/v3d_submit.c b/drivers/gpu/drm/v3d/v3d_submit.c
index eb26fe1e27e3..0320695b941b 100644
--- a/drivers/gpu/drm/v3d/v3d_submit.c
+++ b/drivers/gpu/drm/v3d/v3d_submit.c
@@ -391,6 +391,48 @@ v3d_get_multisync_submit_deps(struct drm_file *file_priv,
return 0;
}
+/* Get data for the indirect CSD job submission. */
+static int
+v3d_get_cpu_indirect_csd_params(struct drm_file *file_priv,
+ struct drm_v3d_extension __user *ext,
+ struct v3d_cpu_job *job)
+{
+ struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
+ struct v3d_dev *v3d = v3d_priv->v3d;
+ struct drm_v3d_indirect_csd indirect_csd;
+ struct v3d_indirect_csd_info *info = &job->indirect_csd;
+
+ if (!job) {
+ DRM_DEBUG("CPU job extension was attached to a GPU job.\n");
+ return -EINVAL;
+ }
+
+ if (job->job_type) {
+ DRM_DEBUG("Two CPU job extensions were added to the same CPU job.\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&indirect_csd, ext, sizeof(indirect_csd)))
+ return -EFAULT;
+
+ if (!v3d_has_csd(v3d)) {
+ DRM_DEBUG("Attempting CSD submit on non-CSD hardware.\n");
+ return -EINVAL;
+ }
+
+ job->job_type = V3D_CPU_JOB_TYPE_INDIRECT_CSD;
+ info->offset = indirect_csd.offset;
+ info->wg_size = indirect_csd.wg_size;
+ memcpy(&info->wg_uniform_offsets, &indirect_csd.wg_uniform_offsets,
+ sizeof(indirect_csd.wg_uniform_offsets));
+
+ info->indirect = drm_gem_object_lookup(file_priv, indirect_csd.indirect);
+
+ return v3d_setup_csd_jobs_and_bos(file_priv, v3d, &indirect_csd.submit,
+ &info->job, &info->clean_job,
+ NULL, &info->acquire_ctx);
+}
+
/* Whenever userspace sets ioctl extensions, v3d_get_extensions parses data
* according to the extension id (name).
*/
@@ -416,6 +458,9 @@ v3d_get_extensions(struct drm_file *file_priv,
case DRM_V3D_EXT_ID_MULTI_SYNC:
ret = v3d_get_multisync_submit_deps(file_priv, user_ext, se);
break;
+ case DRM_V3D_EXT_ID_CPU_INDIRECT_CSD:
+ ret = v3d_get_cpu_indirect_csd_params(file_priv, user_ext, job);
+ break;
default:
DRM_DEBUG_DRIVER("Unknown extension id: %d\n", ext.id);
return -EINVAL;
@@ -790,7 +835,9 @@ v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
return ret;
}
-static const unsigned int cpu_job_bo_handle_count[] = { };
+static const unsigned int cpu_job_bo_handle_count[] = {
+ [V3D_CPU_JOB_TYPE_INDIRECT_CSD] = 1,
+};
/**
* v3d_submit_cpu_ioctl() - Submits a CPU job to the V3D.
@@ -808,7 +855,10 @@ v3d_submit_cpu_ioctl(struct drm_device *dev, void *data,
struct v3d_dev *v3d = to_v3d_dev(dev);
struct drm_v3d_submit_cpu *args = data;
struct v3d_submit_ext se = {0};
+ struct v3d_submit_ext *out_se = NULL;
struct v3d_cpu_job *cpu_job = NULL;
+ struct v3d_csd_job *csd_job = NULL;
+ struct v3d_job *clean_job = NULL;
struct ww_acquire_ctx acquire_ctx;
int ret;
@@ -847,6 +897,9 @@ v3d_submit_cpu_ioctl(struct drm_device *dev, void *data,
if (ret)
goto fail;
+ clean_job = cpu_job->indirect_csd.clean_job;
+ csd_job = cpu_job->indirect_csd.job;
+
if (args->bo_handle_count) {
ret = v3d_lookup_bos(dev, file_priv, &cpu_job->base,
args->bo_handles, args->bo_handle_count);
@@ -860,19 +913,66 @@ v3d_submit_cpu_ioctl(struct drm_device *dev, void *data,
mutex_lock(&v3d->sched_lock);
v3d_push_job(&cpu_job->base);
+
+ switch (cpu_job->job_type) {
+ case V3D_CPU_JOB_TYPE_INDIRECT_CSD:
+ ret = drm_sched_job_add_dependency(&csd_job->base.base,
+ dma_fence_get(cpu_job->base.done_fence));
+ if (ret)
+ goto fail_unreserve;
+
+ v3d_push_job(&csd_job->base);
+
+ ret = drm_sched_job_add_dependency(&clean_job->base,
+ dma_fence_get(csd_job->base.done_fence));
+ if (ret)
+ goto fail_unreserve;
+
+ v3d_push_job(clean_job);
+
+ break;
+ default:
+ break;
+ }
mutex_unlock(&v3d->sched_lock);
+ out_se = (cpu_job->job_type == V3D_CPU_JOB_TYPE_INDIRECT_CSD) ? NULL : &se;
+
v3d_attach_fences_and_unlock_reservation(file_priv,
&cpu_job->base,
&acquire_ctx, 0,
- NULL, cpu_job->base.done_fence);
+ out_se, cpu_job->base.done_fence);
+
+ switch (cpu_job->job_type) {
+ case V3D_CPU_JOB_TYPE_INDIRECT_CSD:
+ v3d_attach_fences_and_unlock_reservation(file_priv,
+ clean_job,
+ &cpu_job->indirect_csd.acquire_ctx,
+ 0, &se, clean_job->done_fence);
+ break;
+ default:
+ break;
+ }
v3d_job_put(&cpu_job->base);
+ v3d_job_put(&csd_job->base);
+ v3d_job_put(clean_job);
return 0;
+fail_unreserve:
+ mutex_unlock(&v3d->sched_lock);
+
+ drm_gem_unlock_reservations(cpu_job->base.bo, cpu_job->base.bo_count,
+ &acquire_ctx);
+
+ drm_gem_unlock_reservations(clean_job->bo, clean_job->bo_count,
+ &cpu_job->indirect_csd.acquire_ctx);
+
fail:
v3d_job_cleanup((void *)cpu_job);
+ v3d_job_cleanup((void *)csd_job);
+ v3d_job_cleanup(clean_job);
v3d_put_multisync_post_deps(&se);
return ret;
diff --git a/include/uapi/drm/v3d_drm.h b/include/uapi/drm/v3d_drm.h
index 00abef9d0db7..0c0f47782528 100644
--- a/include/uapi/drm/v3d_drm.h
+++ b/include/uapi/drm/v3d_drm.h
@@ -71,7 +71,8 @@ extern "C" {
struct drm_v3d_extension {
__u64 next;
__u32 id;
-#define DRM_V3D_EXT_ID_MULTI_SYNC 0x01
+#define DRM_V3D_EXT_ID_MULTI_SYNC 0x01
+#define DRM_V3D_EXT_ID_CPU_INDIRECT_CSD 0x02
__u32 flags; /* mbz */
};
@@ -365,8 +366,46 @@ struct drm_v3d_submit_csd {
__u32 pad;
};
+/**
+ * struct drm_v3d_indirect_csd - ioctl extension for the CPU job to create an
+ * indirect CSD
+ *
+ * When an extension of DRM_V3D_EXT_ID_CPU_INDIRECT_CSD id is defined, it
+ * points to this extension to define a indirect CSD submission. It creates a
+ * CPU job linked to a CSD job. The CPU job waits for the indirect CSD
+ * dependencies and, once they are signaled, it updates the CSD job config
+ * before allowing the CSD job execution.
+ */
+struct drm_v3d_indirect_csd {
+ struct drm_v3d_extension base;
+
+ /* Indirect CSD */
+ struct drm_v3d_submit_csd submit;
+
+ /* Handle of the indirect BO, that should be also attached to the
+ * indirect CSD.
+ */
+ __u32 indirect;
+
+ /* Offset within the BO where the workgroup counts are stored */
+ __u32 offset;
+
+ /* Workgroups size */
+ __u32 wg_size;
+
+ /* Indices of the uniforms with the workgroup dispatch counts
+ * in the uniform stream. If the uniform rewrite is not needed,
+ * the offset must be 0xffffffff.
+ */
+ __u32 wg_uniform_offsets[3];
+};
+
struct drm_v3d_submit_cpu {
- /* Pointer to a u32 array of the BOs that are referenced by the job. */
+ /* Pointer to a u32 array of the BOs that are referenced by the job.
+ *
+ * For DRM_V3D_EXT_ID_CPU_INDIRECT_CSD, it must contain only one BO,
+ * that contains the workgroup counts.
+ */
__u64 bo_handles;
/* Number of BO handles passed in (size is that times 4). */
--
2.42.0
