51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
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/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2018 Intel Corporation
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*/
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#include "i915_drv.h"
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#include "i915_query.h"
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#include <uapi/drm/i915_drm.h>
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static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
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struct drm_i915_query_item *query_item) = {
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};
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int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
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{
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struct drm_i915_private *dev_priv = to_i915(dev);
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struct drm_i915_query *args = data;
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struct drm_i915_query_item __user *user_item_ptr =
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u64_to_user_ptr(args->items_ptr);
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u32 i;
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if (args->flags != 0)
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return -EINVAL;
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for (i = 0; i < args->num_items; i++, user_item_ptr++) {
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struct drm_i915_query_item item;
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u64 func_idx;
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int ret;
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if (copy_from_user(&item, user_item_ptr, sizeof(item)))
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return -EFAULT;
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if (item.query_id == 0)
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return -EINVAL;
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func_idx = item.query_id - 1;
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if (func_idx < ARRAY_SIZE(i915_query_funcs))
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ret = i915_query_funcs[func_idx](dev_priv, &item);
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else
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ret = -EINVAL;
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/* Only write the length back to userspace if they differ. */
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if (ret != item.length && put_user(ret, &user_item_ptr->length))
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return -EFAULT;
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}
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return 0;
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}
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