}
}
+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)
#define DRM_I915_QUERY_TOPOLOGY_INFO 1
#define DRM_I915_QUERY_ENGINE_INFO 2
#define DRM_I915_QUERY_PERF_CONFIG 3
+#define DRM_I915_QUERY_MEMORY_REGIONS 4
/* Must be kept compact -- no holes and well documented */
/**
__u8 data[];
};
+/**
+ * enum drm_i915_gem_memory_class - Supported memory classes
+ */
+enum drm_i915_gem_memory_class {
+ /** @I915_MEMORY_CLASS_SYSTEM: System memory */
+ I915_MEMORY_CLASS_SYSTEM = 0,
+ /** @I915_MEMORY_CLASS_DEVICE: Device local-memory */
+ I915_MEMORY_CLASS_DEVICE,
+};
+
+/**
+ * struct drm_i915_gem_memory_class_instance - Identify particular memory region
+ */
+struct drm_i915_gem_memory_class_instance {
+ /** @memory_class: See enum drm_i915_gem_memory_class */
+ __u16 memory_class;
+
+ /** @memory_instance: Which instance */
+ __u16 memory_instance;
+};
+
+/**
+ * struct drm_i915_memory_region_info - Describes one region as known to the
+ * driver.
+ *
+ * Note that we reserve some stuff here for potential future work. As an example
+ * we might want expose the capabilities for a given region, which could include
+ * things like if the region is CPU mappable/accessible, what are the supported
+ * mapping types etc.
+ *
+ * Note that to extend struct drm_i915_memory_region_info and struct
+ * drm_i915_query_memory_regions in the future the plan is to do the following:
+ *
+ * .. code-block:: C
+ *
+ * struct drm_i915_memory_region_info {
+ * struct drm_i915_gem_memory_class_instance region;
+ * union {
+ * __u32 rsvd0;
+ * __u32 new_thing1;
+ * };
+ * ...
+ * union {
+ * __u64 rsvd1[8];
+ * struct {
+ * __u64 new_thing2;
+ * __u64 new_thing3;
+ * ...
+ * };
+ * };
+ * };
+ *
+ * With this things should remain source compatible between versions for
+ * userspace, even as we add new fields.
+ *
+ * Note this is using both struct drm_i915_query_item and struct drm_i915_query.
+ * For this new query we are adding the new query id DRM_I915_QUERY_MEMORY_REGIONS
+ * at &drm_i915_query_item.query_id.
+ */
+struct drm_i915_memory_region_info {
+ /** @region: The class:instance pair encoding */
+ struct drm_i915_gem_memory_class_instance region;
+
+ /** @rsvd0: MBZ */
+ __u32 rsvd0;
+
+ /** @probed_size: Memory probed by the driver (-1 = unknown) */
+ __u64 probed_size;
+
+ /** @unallocated_size: Estimate of memory remaining (-1 = unknown) */
+ __u64 unallocated_size;
+
+ /** @rsvd1: MBZ */
+ __u64 rsvd1[8];
+};
+
+/**
+ * struct drm_i915_query_memory_regions
+ *
+ * The region info query enumerates all regions known to the driver by filling
+ * in an array of struct drm_i915_memory_region_info structures.
+ *
+ * Example for getting the list of supported regions:
+ *
+ * .. code-block:: C
+ *
+ * struct drm_i915_query_memory_regions *info;
+ * struct drm_i915_query_item item = {
+ * .query_id = DRM_I915_QUERY_MEMORY_REGIONS;
+ * };
+ * struct drm_i915_query query = {
+ * .num_items = 1,
+ * .items_ptr = (uintptr_t)&item,
+ * };
+ * int err, i;
+ *
+ * // First query the size of the blob we need, this needs to be large
+ * // enough to hold our array of regions. The kernel will fill out the
+ * // item.length for us, which is the number of bytes we need.
+ * err = ioctl(fd, DRM_IOCTL_I915_QUERY, &query);
+ * if (err) ...
+ *
+ * info = calloc(1, item.length);
+ * // Now that we allocated the required number of bytes, we call the ioctl
+ * // again, this time with the data_ptr pointing to our newly allocated
+ * // blob, which the kernel can then populate with the all the region info.
+ * item.data_ptr = (uintptr_t)&info,
+ *
+ * err = ioctl(fd, DRM_IOCTL_I915_QUERY, &query);
+ * if (err) ...
+ *
+ * // We can now access each region in the array
+ * for (i = 0; i < info->num_regions; i++) {
+ * struct drm_i915_memory_region_info mr = info->regions[i];
+ * u16 class = mr.region.class;
+ * u16 instance = mr.region.instance;
+ *
+ * ....
+ * }
+ *
+ * free(info);
+ */
+struct drm_i915_query_memory_regions {
+ /** @num_regions: Number of supported regions */
+ __u32 num_regions;
+
+ /** @rsvd: MBZ */
+ __u32 rsvd[3];
+
+ /** @regions: Info about each supported region */
+ struct drm_i915_memory_region_info regions[];
+};
+
#if defined(__cplusplus)
}
#endif
projects / platform / kernel / linux-starfive.git / commitdiff