A CPU job is a type of job that performs operations that requires CPU
intervention. A copy timestamp query job is a job that copy the complete
or partial result of a query to a buffer. As V3D doesn't provide any
mechanism to obtain a timestamp from the GPU, it is a job that needs
CPU intervention.
So, create a user extension for the CPU job that enables the creation
of a copy timestamp query job. This user extension will allow the creation
of a CPU job that copy the results of a timestamp query to a BO with the
possibility to indicate the timestamp availability with a availability bit.
Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
---
drivers/gpu/drm/v3d/v3d_drv.h | 20 +++++++++
drivers/gpu/drm/v3d/v3d_sched.c | 53 ++++++++++++++++++++++++
drivers/gpu/drm/v3d/v3d_submit.c | 69 ++++++++++++++++++++++++++++++++
include/uapi/drm/v3d_drm.h | 45 +++++++++++++++++++++
4 files changed, 187 insertions(+)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index 3988407635ed..5058a354fffd 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -320,6 +320,7 @@ enum v3d_cpu_job_type {
V3D_CPU_JOB_TYPE_INDIRECT_CSD = 1,
V3D_CPU_JOB_TYPE_TIMESTAMP_QUERY,
V3D_CPU_JOB_TYPE_RESET_TIMESTAMP_QUERY,
+ V3D_CPU_JOB_TYPE_COPY_TIMESTAMP_QUERY,
};
struct v3d_timestamp_query {
@@ -361,6 +362,23 @@ struct v3d_timestamp_query_info {
u32 count;
};
+struct v3d_copy_query_results_info {
+ /* Define if should write to buffer using 64 or 32 bits */
+ bool do_64bit;
+
+ /* Define if it can write to buffer even if the query is not available */
+ bool do_partial;
+
+ /* Define if it should write availability bit to buffer */
+ bool availability_bit;
+
+ /* Offset of the copy buffer in the BO */
+ u32 offset;
+
+ /* Stride of the copy buffer in the BO */
+ u32 stride;
+};
+
struct v3d_cpu_job {
struct v3d_job base;
@@ -369,6 +387,8 @@ struct v3d_cpu_job {
struct v3d_indirect_csd_info indirect_csd;
struct v3d_timestamp_query_info timestamp_query;
+
+ struct v3d_copy_query_results_info copy;
};
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 3a435f621b9b..07c897cd3423 100644
--- a/drivers/gpu/drm/v3d/v3d_sched.c
+++ b/drivers/gpu/drm/v3d/v3d_sched.c
@@ -361,11 +361,64 @@ v3d_reset_timestamp_queries(struct v3d_cpu_job *job)
v3d_put_bo_vaddr(bo);
}
+static void
+write_to_buffer(void *dst, u32 idx, bool do_64bit, u64 value)
+{
+ if (do_64bit) {
+ u64 *dst64 = (u64 *) dst;
+ dst64[idx] = value;
+ } else {
+ u32 *dst32 = (u32 *) dst;
+ dst32[idx] = (u32) value;
+ }
+}
+
+static void
+v3d_copy_query_results(struct v3d_cpu_job *job)
+{
+ struct v3d_timestamp_query_info *timestamp_query = &job->timestamp_query;
+ struct v3d_timestamp_query *queries = timestamp_query->queries;
+ struct v3d_bo *bo = to_v3d_bo(job->base.bo[0]);
+ struct v3d_bo *timestamp = to_v3d_bo(job->base.bo[1]);
+ struct v3d_copy_query_results_info *copy = &job->copy;
+ struct dma_fence *fence;
+ u8 *query_addr;
+ bool available, write_result;
+ u8 *data;
+ int i;
+
+ v3d_get_bo_vaddr(bo);
+ v3d_get_bo_vaddr(timestamp);
+
+ data = ((u8 *) bo->vaddr) + copy->offset;
+
+ for (i = 0; i < timestamp_query->count; i++) {
+ fence = drm_syncobj_fence_get(queries[i].syncobj);
+ available = fence ? dma_fence_is_signaled(fence) : false;
+
+ write_result = available || copy->do_partial;
+ if (write_result) {
+ query_addr = ((u8 *) timestamp->vaddr) + queries[i].offset;
+ write_to_buffer(data, 0, copy->do_64bit, *((u64 *) query_addr));
+ }
+
+ if (copy->availability_bit)
+ write_to_buffer(data, 1, copy->do_64bit, available ? 1u : 0u);
+
+ data += copy->stride;
+
+ dma_fence_put(fence);
+ }
+
+ v3d_put_bo_vaddr(timestamp);
+ 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,
[V3D_CPU_JOB_TYPE_TIMESTAMP_QUERY] = v3d_timestamp_query,
[V3D_CPU_JOB_TYPE_RESET_TIMESTAMP_QUERY] = v3d_reset_timestamp_queries,
+ [V3D_CPU_JOB_TYPE_COPY_TIMESTAMP_QUERY] = v3d_copy_query_results,
};
static struct dma_fence *
diff --git a/drivers/gpu/drm/v3d/v3d_submit.c b/drivers/gpu/drm/v3d/v3d_submit.c
index 1c719416e26a..bafd49c6440c 100644
--- a/drivers/gpu/drm/v3d/v3d_submit.c
+++ b/drivers/gpu/drm/v3d/v3d_submit.c
@@ -539,6 +539,71 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv,
return 0;
}
+/* Get data for the copy timestamp query results job submission. */
+static int
+v3d_get_cpu_copy_query_results_params(struct drm_file *file_priv,
+ struct drm_v3d_extension __user *ext,
+ struct v3d_cpu_job *job)
+{
+ u32 __user *offsets, *syncs;
+ struct drm_v3d_copy_timestamp_query copy;
+ int i;
+
+ 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(©, ext, sizeof(copy)))
+ return -EFAULT;
+
+ if (copy.pad)
+ return -EINVAL;
+
+ job->job_type = V3D_CPU_JOB_TYPE_COPY_TIMESTAMP_QUERY;
+
+ job->timestamp_query.queries = kvmalloc_array(copy.count,
+ sizeof(struct v3d_timestamp_query),
+ GFP_KERNEL);
+ if (!job->timestamp_query.queries)
+ return -ENOMEM;
+
+ offsets = u64_to_user_ptr(copy.offsets);
+ syncs = u64_to_user_ptr(copy.syncs);
+
+ for (i = 0; i < copy.count; i++) {
+ u32 offset, sync;
+
+ if (copy_from_user(&offset, offsets++, sizeof(offset))) {
+ kvfree(job->timestamp_query.queries);
+ return -EFAULT;
+ }
+
+ job->timestamp_query.queries[i].offset = offset;
+
+ if (copy_from_user(&sync, syncs++, sizeof(sync))) {
+ kvfree(job->timestamp_query.queries);
+ return -EFAULT;
+ }
+
+ job->timestamp_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync);
+ }
+ job->timestamp_query.count = copy.count;
+
+ job->copy.do_64bit = copy.do_64bit;
+ job->copy.do_partial = copy.do_partial;
+ job->copy.availability_bit = copy.availability_bit;
+ job->copy.offset = copy.offset;
+ job->copy.stride = copy.stride;
+
+ return 0;
+}
+
/* Whenever userspace sets ioctl extensions, v3d_get_extensions parses data
* according to the extension id (name).
*/
@@ -573,6 +638,9 @@ v3d_get_extensions(struct drm_file *file_priv,
case DRM_V3D_EXT_ID_CPU_RESET_TIMESTAMP_QUERY:
ret = v3d_get_cpu_reset_timestamp_params(file_priv, user_ext, job);
break;
+ case DRM_V3D_EXT_ID_CPU_COPY_TIMESTAMP_QUERY:
+ ret = v3d_get_cpu_copy_query_results_params(file_priv, user_ext, job);
+ break;
default:
DRM_DEBUG_DRIVER("Unknown extension id: %d\n", ext.id);
return -EINVAL;
@@ -951,6 +1019,7 @@ static const unsigned int cpu_job_bo_handle_count[] = {
[V3D_CPU_JOB_TYPE_INDIRECT_CSD] = 1,
[V3D_CPU_JOB_TYPE_TIMESTAMP_QUERY] = 1,
[V3D_CPU_JOB_TYPE_RESET_TIMESTAMP_QUERY] = 1,
+ [V3D_CPU_JOB_TYPE_COPY_TIMESTAMP_QUERY] = 2,
};
/**
diff --git a/include/uapi/drm/v3d_drm.h b/include/uapi/drm/v3d_drm.h
index 930f8d07f088..a3ae1f220291 100644
--- a/include/uapi/drm/v3d_drm.h
+++ b/include/uapi/drm/v3d_drm.h
@@ -75,6 +75,7 @@ struct drm_v3d_extension {
#define DRM_V3D_EXT_ID_CPU_INDIRECT_CSD 0x02
#define DRM_V3D_EXT_ID_CPU_TIMESTAMP_QUERY 0x03
#define DRM_V3D_EXT_ID_CPU_RESET_TIMESTAMP_QUERY 0x04
+#define DRM_V3D_EXT_ID_CPU_COPY_TIMESTAMP_QUERY 0x05
__u32 flags; /* mbz */
};
@@ -451,6 +452,46 @@ struct drm_v3d_reset_timestamp_query {
__u32 count;
};
+/**
+ * struct drm_v3d_copy_timestamp_query - ioctl extension for the CPU job to copy
+ * query results to a buffer
+ *
+ * When an extension DRM_V3D_EXT_ID_CPU_COPY_TIMESTAMP_QUERY is defined, it
+ * points to this extension to define a copy timestamp query submission. This
+ * CPU job will copy the timestamp queries results to a BO with the offset
+ * and stride defined in the extension.
+ */
+struct drm_v3d_copy_timestamp_query {
+ struct drm_v3d_extension base;
+
+ /* Define if should write to buffer using 64 or 32 bits */
+ __u8 do_64bit;
+
+ /* Define if it can write to buffer even if the query is not available */
+ __u8 do_partial;
+
+ /* Define if it should write availability bit to buffer */
+ __u8 availability_bit;
+
+ /* mbz */
+ __u8 pad;
+
+ /* Offset of the buffer in the BO */
+ __u32 offset;
+
+ /* Stride of the buffer in the BO */
+ __u32 stride;
+
+ /* Number of queries */
+ __u32 count;
+
+ /* Array of queries' offsets within the timestamp BO for their value */
+ __u64 offsets;
+
+ /* Array of timestamp's syncobjs to indicate its availability */
+ __u64 syncs;
+};
+
struct drm_v3d_submit_cpu {
/* Pointer to a u32 array of the BOs that are referenced by the job.
*
@@ -462,6 +503,10 @@ struct drm_v3d_submit_cpu {
*
* For DRM_V3D_EXT_ID_CPU_RESET_TIMESTAMP_QUERY, it must contain only
* one BO, that contains the timestamp.
+ *
+ * For DRM_V3D_EXT_ID_CPU_COPY_TIMESTAMP_QUERY, it must contain two
+ * BOs. The first is the BO for which the timestamp queries results
+ * will be written to. The second is the BO that contains the timestamp.
*/
__u64 bo_handles;
--
2.42.0
