freedreno: move drm to common location

So that we can re-use at least parts of it for vulkan driver, and so
that we can move ir3 to a common location (which uses fd_bo to allocate
storage for shaders)

Signed-off-by: Rob Clark <[email protected]>

1 files changed, 218 insertions, 0 deletions

diff --git a/src/freedreno/drm/freedreno_bo_cache.c b/src/freedreno/drm/freedreno_bo_cache.c
new file mode 100644
index 00000000000..e8193caa721
--- /dev/null
+++ b/src/freedreno/drm/freedreno_bo_cache.c
@@ -0,0 +1,218 @@
+/*
+ * Copyright (C) 2012-2018 Rob Clark <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#include "freedreno_drmif.h"
+#include "freedreno_priv.h"
+
+void bo_del(struct fd_bo *bo);
+extern pthread_mutex_t table_lock;
+
+static void
+add_bucket(struct fd_bo_cache *cache, int size)
+{
+	unsigned int i = cache->num_buckets;
+
+	assert(i < ARRAY_SIZE(cache->cache_bucket));
+
+	list_inithead(&cache->cache_bucket[i].list);
+	cache->cache_bucket[i].size = size;
+	cache->num_buckets++;
+}
+
+/**
+ * @coarse: if true, only power-of-two bucket sizes, otherwise
+ *    fill in for a bit smoother size curve..
+ */
+void
+fd_bo_cache_init(struct fd_bo_cache *cache, int coarse)
+{
+	unsigned long size, cache_max_size = 64 * 1024 * 1024;
+
+	/* OK, so power of two buckets was too wasteful of memory.
+	 * Give 3 other sizes between each power of two, to hopefully
+	 * cover things accurately enough.  (The alternative is
+	 * probably to just go for exact matching of sizes, and assume
+	 * that for things like composited window resize the tiled
+	 * width/height alignment and rounding of sizes to pages will
+	 * get us useful cache hit rates anyway)
+	 */
+	add_bucket(cache, 4096);
+	add_bucket(cache, 4096 * 2);
+	if (!coarse)
+		add_bucket(cache, 4096 * 3);
+
+	/* Initialize the linked lists for BO reuse cache. */
+	for (size = 4 * 4096; size <= cache_max_size; size *= 2) {
+		add_bucket(cache, size);
+		if (!coarse) {
+			add_bucket(cache, size + size * 1 / 4);
+			add_bucket(cache, size + size * 2 / 4);
+			add_bucket(cache, size + size * 3 / 4);
+		}
+	}
+}
+
+/* Frees older cached buffers.  Called under table_lock */
+void
+fd_bo_cache_cleanup(struct fd_bo_cache *cache, time_t time)
+{
+	int i;
+
+	if (cache->time == time)
+		return;
+
+	for (i = 0; i < cache->num_buckets; i++) {
+		struct fd_bo_bucket *bucket = &cache->cache_bucket[i];
+		struct fd_bo *bo;
+
+		while (!LIST_IS_EMPTY(&bucket->list)) {
+			bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list);
+
+			/* keep things in cache for at least 1 second: */
+			if (time && ((time - bo->free_time) <= 1))
+				break;
+
+			VG_BO_OBTAIN(bo);
+			list_del(&bo->list);
+			bo_del(bo);
+		}
+	}
+
+	cache->time = time;
+}
+
+static struct fd_bo_bucket * get_bucket(struct fd_bo_cache *cache, uint32_t size)
+{
+	int i;
+
+	/* hmm, this is what intel does, but I suppose we could calculate our
+	 * way to the correct bucket size rather than looping..
+	 */
+	for (i = 0; i < cache->num_buckets; i++) {
+		struct fd_bo_bucket *bucket = &cache->cache_bucket[i];
+		if (bucket->size >= size) {
+			return bucket;
+		}
+	}
+
+	return NULL;
+}
+
+static int is_idle(struct fd_bo *bo)
+{
+	return fd_bo_cpu_prep(bo, NULL,
+			DRM_FREEDRENO_PREP_READ |
+			DRM_FREEDRENO_PREP_WRITE |
+			DRM_FREEDRENO_PREP_NOSYNC) == 0;
+}
+
+static struct fd_bo *find_in_bucket(struct fd_bo_bucket *bucket, uint32_t flags)
+{
+	struct fd_bo *bo = NULL;
+
+	/* TODO .. if we had an ALLOC_FOR_RENDER flag like intel, we could
+	 * skip the busy check.. if it is only going to be a render target
+	 * then we probably don't need to stall..
+	 *
+	 * NOTE that intel takes ALLOC_FOR_RENDER bo's from the list tail
+	 * (MRU, since likely to be in GPU cache), rather than head (LRU)..
+	 */
+	pthread_mutex_lock(&table_lock);
+	if (!LIST_IS_EMPTY(&bucket->list)) {
+		bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list);
+		/* TODO check for compatible flags? */
+		if (is_idle(bo)) {
+			list_del(&bo->list);
+		} else {
+			bo = NULL;
+		}
+	}
+	pthread_mutex_unlock(&table_lock);
+
+	return bo;
+}
+
+/* NOTE: size is potentially rounded up to bucket size: */
+struct fd_bo *
+fd_bo_cache_alloc(struct fd_bo_cache *cache, uint32_t *size, uint32_t flags)
+{
+	struct fd_bo *bo = NULL;
+	struct fd_bo_bucket *bucket;
+
+	*size = align(*size, 4096);
+	bucket = get_bucket(cache, *size);
+
+	/* see if we can be green and recycle: */
+retry:
+	if (bucket) {
+		*size = bucket->size;
+		bo = find_in_bucket(bucket, flags);
+		if (bo) {
+			VG_BO_OBTAIN(bo);
+			if (bo->funcs->madvise(bo, TRUE) <= 0) {
+				/* we've lost the backing pages, delete and try again: */
+				pthread_mutex_lock(&table_lock);
+				bo_del(bo);
+				pthread_mutex_unlock(&table_lock);
+				goto retry;
+			}
+			p_atomic_set(&bo->refcnt, 1);
+			fd_device_ref(bo->dev);
+			return bo;
+		}
+	}
+
+	return NULL;
+}
+
+int
+fd_bo_cache_free(struct fd_bo_cache *cache, struct fd_bo *bo)
+{
+	struct fd_bo_bucket *bucket = get_bucket(cache, bo->size);
+
+	/* see if we can be green and recycle: */
+	if (bucket) {
+		struct timespec time;
+
+		bo->funcs->madvise(bo, FALSE);
+
+		clock_gettime(CLOCK_MONOTONIC, &time);
+
+		bo->free_time = time.tv_sec;
+		VG_BO_RELEASE(bo);
+		list_addtail(&bo->list, &bucket->list);
+		fd_bo_cache_cleanup(cache, time.tv_sec);
+
+		/* bo's in the bucket cache don't have a ref and
+		 * don't hold a ref to the dev:
+		 */
+		fd_device_del_locked(bo->dev);
+
+		return 0;
+	}
+
+	return -1;
+}