[PATCH v3 36/37] drm/i915/query: Expose memory regions through the query uAPI

Matthew Auld
2019-08-09T22:26:42Z

From: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>

Returns the available memory region areas supported by the HW.

Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
---
drivers/gpu/drm/i915/i915_query.c | 57 +++++++++++++++++++++++++++++++
include/uapi/drm/i915_drm.h | 39 +++++++++++++++++++++
2 files changed, 96 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
index ad9240a0817a..69a2a906feef 100644
--- a/drivers/gpu/drm/i915/i915_query.c
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -142,10 +142,67 @@ query_engine_info(struct drm_i915_private *i915,
return len;
}

+static int query_memregion_info(struct drm_i915_private *dev_priv,
+ struct drm_i915_query_item *query_item)
+{
+ struct drm_i915_query_memory_region_info __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_region_info query;
+ u32 total_length;
+ int ret, i;
+
+ if (query_item->flags != 0)
+ return -EINVAL;
+
+ total_length = sizeof(struct drm_i915_query_memory_region_info);
+ for (i = 0; i < ARRAY_SIZE(dev_priv->regions); ++i) {
+ struct intel_memory_region *region = dev_priv->regions[i];
+
+ if (!region)
+ continue;
+
+ total_length += sizeof(struct drm_i915_memory_region_info);
+ }
+
+ ret = copy_query_item(&query, sizeof(query), total_length,
+ query_item);
+ if (ret != 0)
+ return ret;
+
+ if (query.num_regions || query.rsvd[0] || query.rsvd[1] ||
+ query.rsvd[2])
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(dev_priv->regions); ++i) {
+ struct intel_memory_region *region = dev_priv->regions[i];
+
+ if (!region)
+ continue;
+
+ info.id = region->id;
+ info.size = resource_size(&region->region);
+
+ 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_memregion_info,
};

int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 75d79c17e91b..7ef037f58e1b 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -2038,6 +2038,7 @@ struct drm_i915_query_item {
__u64 query_id;
#define DRM_I915_QUERY_TOPOLOGY_INFO 1
#define DRM_I915_QUERY_ENGINE_INFO 2
+#define DRM_I915_QUERY_MEMREGION_INFO 3
/* Must be kept compact -- no holes and well documented */

/*
@@ -2177,6 +2178,44 @@ struct drm_i915_query_engine_info {
struct drm_i915_engine_info engines[];
};

+struct drm_i915_memory_region_info {
+
+ /** Base type of a region
+ */
+#define I915_SYSTEM_MEMORY 0
+#define I915_DEVICE_MEMORY 1
+
+ /** The region id is encoded in a layout which makes it possible to
+ * retrieve the following information:
+ *
+ * Base type: log2(ID >> 16)
+ * Instance: log2(ID & 0xffff)
+ */
+ __u32 id;
+
+ /** Reserved field. MBZ */
+ __u32 rsvd0;
+
+ /** Unused for now. MBZ */
+ __u64 flags;
+
+ __u64 size;
+
+ /** Reserved fields must be cleared to zero. */
+ __u64 rsvd1[4];
+};
+
+struct drm_i915_query_memory_region_info {
+
+ /** Number of struct drm_i915_memory_region_info structs */
+ __u32 num_regions;
+
+ /** MBZ */
+ __u32 rsvd[3];
+
+ struct drm_i915_memory_region_info regions[];
+};
+
#if defined(__cplusplus)
}
#endif
--
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org