Mesa (master): anv: add a comment describing has_relocs field

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Module: Mesa
Branch: master
Commit: e93344288b7e6ae35fba9b7898388e4b6c1f2698
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e93344288b7e6ae35fba9b7898388e4b6c1f2698

Author: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Date:   Sun Dec  6 22:23:17 2020 +0200

anv: add a comment describing has_relocs field

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8934>

---

 src/intel/vulkan/anv_batch_chain.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/intel/vulkan/anv_batch_chain.c b/src/intel/vulkan/anv_batch_chain.c
index fd197930aaa..5ea24bb3945 100644
--- a/src/intel/vulkan/anv_batch_chain.c
+++ b/src/intel/vulkan/anv_batch_chain.c
@@ -1110,6 +1110,11 @@ struct anv_execbuf {
    /* Allocated length of the 'objects' and 'bos' arrays */
    uint32_t                                  array_length;
 
+   /* Indicates whether any of the command buffers have relocations. This
+    * doesn't not necessarily mean we'll need the kernel to process them. It
+    * might be that a previous execbuf has already placed things in the VMA
+    * and we can make i915 skip the relocations.
+    */
    bool                                      has_relocs;
 
    const VkAllocationCallbacks *             alloc;