drm/i915/query: Expose memory regions through the query uAPI

[linux-2.6-microblaze.git] / drivers / gpu / drm / i915 / i915_query.c

diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
index fed337a..5e2b909 100644 (file)
--- a/drivers/gpu/drm/i915/i915_query.c
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -419,11 +419,70 @@ static int query_perf_config(struct drm_i915_private *i915,
        }
 }
 
+static int query_memregion_info(struct drm_i915_private *i915,
+                               struct drm_i915_query_item *query_item)
+{
+       struct drm_i915_query_memory_regions __user *query_ptr =
+               u64_to_user_ptr(query_item->data_ptr);
+       struct drm_i915_memory_region_info __user *info_ptr =
+               &query_ptr->regions[0];
+       struct drm_i915_memory_region_info info = { };
+       struct drm_i915_query_memory_regions query;
+       struct intel_memory_region *mr;
+       u32 total_length;
+       int ret, id, i;
+
+       if (query_item->flags != 0)
+               return -EINVAL;
+
+       total_length = sizeof(query);
+       for_each_memory_region(mr, i915, id) {
+               if (mr->private)
+                       continue;
+
+               total_length += sizeof(info);
+       }
+
+       ret = copy_query_item(&query, sizeof(query), total_length, query_item);
+       if (ret != 0)
+               return ret;
+
+       if (query.num_regions)
+               return -EINVAL;
+
+       for (i = 0; i < ARRAY_SIZE(query.rsvd); i++) {
+               if (query.rsvd[i])
+                       return -EINVAL;
+       }
+
+       for_each_memory_region(mr, i915, id) {
+               if (mr->private)
+                       continue;
+
+               info.region.memory_class = mr->type;
+               info.region.memory_instance = mr->instance;
+               info.probed_size = mr->total;
+               info.unallocated_size = mr->avail;
+
+               if (__copy_to_user(info_ptr, &info, sizeof(info)))
+                       return -EFAULT;
+
+               query.num_regions++;
+               info_ptr++;
+       }
+
+       if (__copy_to_user(query_ptr, &query, sizeof(query)))
+               return -EFAULT;
+
+       return total_length;
+}
+
 static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
                                        struct drm_i915_query_item *query_item) = {
        query_topology_info,
        query_engine_info,
        query_perf_config,
+       query_memregion_info,
 };
 
 int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)