Mesa (main): venus: add vn_renderer_shmem_pool
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gitlab-mirror at kemper.freedesktop.org
Wed Dec 15 19:12:29 UTC 2021
Module: Mesa
Branch: main
Commit: 35c430e75a10c5ffcd6bce99dc657b196c7766f7
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=35c430e75a10c5ffcd6bce99dc657b196c7766f7
Author: Chia-I Wu <olvaffe at gmail.com>
Date: Wed Dec 8 15:32:19 2021 -0800
venus: add vn_renderer_shmem_pool
It provides shmem suballocations. It is designed to be used with
short-lived shmems. A long-lived shmem can hold on to some large
allocation while only using a likely small region of the large
allocation.
v2: cleanups suggested by Yiwei
Signed-off-by: Chia-I Wu <olvaffe at gmail.com>
Reviewed-by: Ryan Neph <ryanneph at google.com> (v1)
Reviewed-by: Yiwei Zhang <zzyiwei at chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14179>
---
src/virtio/vulkan/vn_renderer_util.c | 68 ++++++++++++++++++++++++++++++++++++
src/virtio/vulkan/vn_renderer_util.h | 24 +++++++++++++
2 files changed, 92 insertions(+)
diff --git a/src/virtio/vulkan/vn_renderer_util.c b/src/virtio/vulkan/vn_renderer_util.c
index 2eae0e697d5..656c0c1bcf3 100644
--- a/src/virtio/vulkan/vn_renderer_util.c
+++ b/src/virtio/vulkan/vn_renderer_util.c
@@ -43,3 +43,71 @@ vn_renderer_submit_simple_sync(struct vn_renderer *renderer,
return result;
}
+
+void
+vn_renderer_shmem_pool_init(UNUSED struct vn_renderer *renderer,
+ struct vn_renderer_shmem_pool *pool,
+ size_t min_alloc_size)
+{
+ *pool = (struct vn_renderer_shmem_pool){
+ /* power-of-two to hit shmem cache */
+ .min_alloc_size = util_next_power_of_two(min_alloc_size),
+ };
+}
+
+void
+vn_renderer_shmem_pool_fini(struct vn_renderer *renderer,
+ struct vn_renderer_shmem_pool *pool)
+{
+ if (pool->shmem)
+ vn_renderer_shmem_unref(renderer, pool->shmem);
+}
+
+static bool
+vn_renderer_shmem_pool_grow(struct vn_renderer *renderer,
+ struct vn_renderer_shmem_pool *pool,
+ size_t size)
+{
+ /* power-of-two to hit shmem cache */
+ size_t alloc_size = pool->min_alloc_size;
+ while (alloc_size < size) {
+ alloc_size <<= 1;
+ if (!alloc_size)
+ return false;
+ }
+
+ struct vn_renderer_shmem *shmem =
+ vn_renderer_shmem_create(renderer, alloc_size);
+ if (!shmem)
+ return false;
+
+ if (pool->shmem)
+ vn_renderer_shmem_unref(renderer, pool->shmem);
+
+ pool->shmem = shmem;
+ pool->size = alloc_size;
+ pool->used = 0;
+
+ return true;
+}
+
+struct vn_renderer_shmem *
+vn_renderer_shmem_pool_alloc(struct vn_renderer *renderer,
+ struct vn_renderer_shmem_pool *pool,
+ size_t size,
+ size_t *out_offset)
+{
+ if (unlikely(size > pool->size - pool->used)) {
+ if (!vn_renderer_shmem_pool_grow(renderer, pool, size))
+ return NULL;
+
+ assert(size <= pool->size - pool->used);
+ }
+
+ struct vn_renderer_shmem *shmem =
+ vn_renderer_shmem_ref(renderer, pool->shmem);
+ *out_offset = pool->used;
+ pool->used += size;
+
+ return shmem;
+}
diff --git a/src/virtio/vulkan/vn_renderer_util.h b/src/virtio/vulkan/vn_renderer_util.h
index cefe4bfc5e9..a5797907ac3 100644
--- a/src/virtio/vulkan/vn_renderer_util.h
+++ b/src/virtio/vulkan/vn_renderer_util.h
@@ -8,6 +8,15 @@
#include "vn_renderer.h"
+/* for suballocations of short-lived shmems, not thread-safe */
+struct vn_renderer_shmem_pool {
+ size_t min_alloc_size;
+
+ struct vn_renderer_shmem *shmem;
+ size_t size;
+ size_t used;
+};
+
static inline VkResult
vn_renderer_submit_simple(struct vn_renderer *renderer,
const void *cs_data,
@@ -29,4 +38,19 @@ vn_renderer_submit_simple_sync(struct vn_renderer *renderer,
const void *cs_data,
size_t cs_size);
+void
+vn_renderer_shmem_pool_init(struct vn_renderer *renderer,
+ struct vn_renderer_shmem_pool *pool,
+ size_t min_alloc_size);
+
+void
+vn_renderer_shmem_pool_fini(struct vn_renderer *renderer,
+ struct vn_renderer_shmem_pool *pool);
+
+struct vn_renderer_shmem *
+vn_renderer_shmem_pool_alloc(struct vn_renderer *renderer,
+ struct vn_renderer_shmem_pool *pool,
+ size_t size,
+ size_t *out_offset);
+
#endif /* VN_RENDERER_UTIL_H */
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