| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20240906215411.18770-12-saeed@kernel.org>
Date: Fri, 6 Sep 2024 14:54:06 -0700
From: Saeed Mahameed <saeed@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Eric Dumazet <edumazet@...gle.com>
Cc: Saeed Mahameed <saeedm@...dia.com>,
netdev@...r.kernel.org,
Tariq Toukan <tariqt@...dia.com>,
Gal Pressman <gal@...dia.com>,
Leon Romanovsky <leonro@...dia.com>,
Yevgeny Kliteynik <kliteyn@...dia.com>,
Itamar Gozlan <igozlan@...dia.com>
Subject: [net-next V3 11/15] net/mlx5: HWS, added memory management handling
From: Yevgeny Kliteynik <kliteyn@...dia.com>
Added object pools and buddy allocator functionality.
Reviewed-by: Itamar Gozlan <igozlan@...dia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
.../mlx5/core/steering/hws/mlx5hws_buddy.c | 149 ++++
.../mlx5/core/steering/hws/mlx5hws_buddy.h | 21 +
.../mlx5/core/steering/hws/mlx5hws_pool.c | 640 ++++++++++++++++++
.../mlx5/core/steering/hws/mlx5hws_pool.h | 151 +++++
4 files changed, 961 insertions(+)
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_buddy.c
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_buddy.h
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pool.c
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pool.h
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_buddy.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_buddy.c
new file mode 100644
index 000000000000..e6ed66202a40
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_buddy.c
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
+
+#include "mlx5hws_internal.h"
+#include "mlx5hws_buddy.h"
+
+static int hws_buddy_init(struct mlx5hws_buddy_mem *buddy, u32 max_order)
+{
+ int i, s, ret = 0;
+
+ buddy->max_order = max_order;
+
+ buddy->bitmap = kcalloc(buddy->max_order + 1,
+ sizeof(*buddy->bitmap),
+ GFP_KERNEL);
+ if (!buddy->bitmap)
+ return -ENOMEM;
+
+ buddy->num_free = kcalloc(buddy->max_order + 1,
+ sizeof(*buddy->num_free),
+ GFP_KERNEL);
+ if (!buddy->num_free) {
+ ret = -ENOMEM;
+ goto err_out_free_bits;
+ }
+
+ for (i = 0; i <= (int)buddy->max_order; ++i) {
+ s = 1 << (buddy->max_order - i);
+
+ buddy->bitmap[i] = bitmap_zalloc(s, GFP_KERNEL);
+ if (!buddy->bitmap[i]) {
+ ret = -ENOMEM;
+ goto err_out_free_num_free;
+ }
+ }
+
+ bitmap_set(buddy->bitmap[buddy->max_order], 0, 1);
+ buddy->num_free[buddy->max_order] = 1;
+
+ return 0;
+
+err_out_free_num_free:
+ for (i = 0; i <= (int)buddy->max_order; ++i)
+ bitmap_free(buddy->bitmap[i]);
+
+ kfree(buddy->num_free);
+
+err_out_free_bits:
+ kfree(buddy->bitmap);
+ return ret;
+}
+
+struct mlx5hws_buddy_mem *mlx5hws_buddy_create(u32 max_order)
+{
+ struct mlx5hws_buddy_mem *buddy;
+
+ buddy = kzalloc(sizeof(*buddy), GFP_KERNEL);
+ if (!buddy)
+ return NULL;
+
+ if (hws_buddy_init(buddy, max_order))
+ goto free_buddy;
+
+ return buddy;
+
+free_buddy:
+ kfree(buddy);
+ return NULL;
+}
+
+void mlx5hws_buddy_cleanup(struct mlx5hws_buddy_mem *buddy)
+{
+ int i;
+
+ for (i = 0; i <= (int)buddy->max_order; ++i)
+ bitmap_free(buddy->bitmap[i]);
+
+ kfree(buddy->num_free);
+ kfree(buddy->bitmap);
+}
+
+static int hws_buddy_find_free_seg(struct mlx5hws_buddy_mem *buddy,
+ u32 start_order,
+ u32 *segment,
+ u32 *order)
+{
+ unsigned int seg, order_iter, m;
+
+ for (order_iter = start_order;
+ order_iter <= buddy->max_order; ++order_iter) {
+ if (!buddy->num_free[order_iter])
+ continue;
+
+ m = 1 << (buddy->max_order - order_iter);
+ seg = find_first_bit(buddy->bitmap[order_iter], m);
+
+ if (WARN(seg >= m,
+ "ICM Buddy: failed finding free mem for order %d\n",
+ order_iter))
+ return -ENOMEM;
+
+ break;
+ }
+
+ if (order_iter > buddy->max_order)
+ return -ENOMEM;
+
+ *segment = seg;
+ *order = order_iter;
+ return 0;
+}
+
+int mlx5hws_buddy_alloc_mem(struct mlx5hws_buddy_mem *buddy, u32 order)
+{
+ u32 seg, order_iter, err;
+
+ err = hws_buddy_find_free_seg(buddy, order, &seg, &order_iter);
+ if (err)
+ return err;
+
+ bitmap_clear(buddy->bitmap[order_iter], seg, 1);
+ --buddy->num_free[order_iter];
+
+ while (order_iter > order) {
+ --order_iter;
+ seg <<= 1;
+ bitmap_set(buddy->bitmap[order_iter], seg ^ 1, 1);
+ ++buddy->num_free[order_iter];
+ }
+
+ seg <<= order;
+
+ return seg;
+}
+
+void mlx5hws_buddy_free_mem(struct mlx5hws_buddy_mem *buddy, u32 seg, u32 order)
+{
+ seg >>= order;
+
+ while (test_bit(seg ^ 1, buddy->bitmap[order])) {
+ bitmap_clear(buddy->bitmap[order], seg ^ 1, 1);
+ --buddy->num_free[order];
+ seg >>= 1;
+ ++order;
+ }
+
+ bitmap_set(buddy->bitmap[order], seg, 1);
+ ++buddy->num_free[order];
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_buddy.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_buddy.h
new file mode 100644
index 000000000000..338c44bbedaf
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_buddy.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
+
+#ifndef MLX5HWS_BUDDY_H_
+#define MLX5HWS_BUDDY_H_
+
+struct mlx5hws_buddy_mem {
+ unsigned long **bitmap;
+ unsigned int *num_free;
+ u32 max_order;
+};
+
+struct mlx5hws_buddy_mem *mlx5hws_buddy_create(u32 max_order);
+
+void mlx5hws_buddy_cleanup(struct mlx5hws_buddy_mem *buddy);
+
+int mlx5hws_buddy_alloc_mem(struct mlx5hws_buddy_mem *buddy, u32 order);
+
+void mlx5hws_buddy_free_mem(struct mlx5hws_buddy_mem *buddy, u32 seg, u32 order);
+
+#endif /* MLX5HWS_BUDDY_H_ */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pool.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pool.c
new file mode 100644
index 000000000000..3de689e74cac
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pool.c
@@ -0,0 +1,640 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
+
+#include "mlx5hws_internal.h"
+#include "mlx5hws_buddy.h"
+
+static void hws_pool_free_one_resource(struct mlx5hws_pool_resource *resource)
+{
+ switch (resource->pool->type) {
+ case MLX5HWS_POOL_TYPE_STE:
+ mlx5hws_cmd_ste_destroy(resource->pool->ctx->mdev, resource->base_id);
+ break;
+ case MLX5HWS_POOL_TYPE_STC:
+ mlx5hws_cmd_stc_destroy(resource->pool->ctx->mdev, resource->base_id);
+ break;
+ default:
+ break;
+ }
+
+ kfree(resource);
+}
+
+static void hws_pool_resource_free(struct mlx5hws_pool *pool,
+ int resource_idx)
+{
+ hws_pool_free_one_resource(pool->resource[resource_idx]);
+ pool->resource[resource_idx] = NULL;
+
+ if (pool->tbl_type == MLX5HWS_TABLE_TYPE_FDB) {
+ hws_pool_free_one_resource(pool->mirror_resource[resource_idx]);
+ pool->mirror_resource[resource_idx] = NULL;
+ }
+}
+
+static struct mlx5hws_pool_resource *
+hws_pool_create_one_resource(struct mlx5hws_pool *pool, u32 log_range,
+ u32 fw_ft_type)
+{
+ struct mlx5hws_cmd_ste_create_attr ste_attr;
+ struct mlx5hws_cmd_stc_create_attr stc_attr;
+ struct mlx5hws_pool_resource *resource;
+ u32 obj_id;
+ int ret;
+
+ resource = kzalloc(sizeof(*resource), GFP_KERNEL);
+ if (!resource)
+ return NULL;
+
+ switch (pool->type) {
+ case MLX5HWS_POOL_TYPE_STE:
+ ste_attr.log_obj_range = log_range;
+ ste_attr.table_type = fw_ft_type;
+ ret = mlx5hws_cmd_ste_create(pool->ctx->mdev, &ste_attr, &obj_id);
+ break;
+ case MLX5HWS_POOL_TYPE_STC:
+ stc_attr.log_obj_range = log_range;
+ stc_attr.table_type = fw_ft_type;
+ ret = mlx5hws_cmd_stc_create(pool->ctx->mdev, &stc_attr, &obj_id);
+ break;
+ default:
+ return NULL;
+ }
+
+ if (ret) {
+ mlx5hws_err(pool->ctx, "Failed to allocate resource objects\n");
+ goto free_resource;
+ }
+
+ resource->pool = pool;
+ resource->range = 1 << log_range;
+ resource->base_id = obj_id;
+
+ return resource;
+
+free_resource:
+ kfree(resource);
+ return NULL;
+}
+
+static int
+hws_pool_resource_alloc(struct mlx5hws_pool *pool, u32 log_range, int idx)
+{
+ struct mlx5hws_pool_resource *resource;
+ u32 fw_ft_type, opt_log_range;
+
+ fw_ft_type = mlx5hws_table_get_res_fw_ft_type(pool->tbl_type, false);
+ opt_log_range = pool->opt_type == MLX5HWS_POOL_OPTIMIZE_ORIG ? 0 : log_range;
+ resource = hws_pool_create_one_resource(pool, opt_log_range, fw_ft_type);
+ if (!resource) {
+ mlx5hws_err(pool->ctx, "Failed allocating resource\n");
+ return -EINVAL;
+ }
+
+ pool->resource[idx] = resource;
+
+ if (pool->tbl_type == MLX5HWS_TABLE_TYPE_FDB) {
+ struct mlx5hws_pool_resource *mirror_resource;
+
+ fw_ft_type = mlx5hws_table_get_res_fw_ft_type(pool->tbl_type, true);
+ opt_log_range = pool->opt_type == MLX5HWS_POOL_OPTIMIZE_MIRROR ? 0 : log_range;
+ mirror_resource = hws_pool_create_one_resource(pool, opt_log_range, fw_ft_type);
+ if (!mirror_resource) {
+ mlx5hws_err(pool->ctx, "Failed allocating mirrored resource\n");
+ hws_pool_free_one_resource(resource);
+ pool->resource[idx] = NULL;
+ return -EINVAL;
+ }
+ pool->mirror_resource[idx] = mirror_resource;
+ }
+
+ return 0;
+}
+
+static unsigned long *hws_pool_create_and_init_bitmap(u32 log_range)
+{
+ unsigned long *cur_bmp;
+
+ cur_bmp = bitmap_zalloc(1 << log_range, GFP_KERNEL);
+ if (!cur_bmp)
+ return NULL;
+
+ bitmap_fill(cur_bmp, 1 << log_range);
+
+ return cur_bmp;
+}
+
+static void hws_pool_buddy_db_put_chunk(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ struct mlx5hws_buddy_mem *buddy;
+
+ buddy = pool->db.buddy_manager->buddies[chunk->resource_idx];
+ if (!buddy) {
+ mlx5hws_err(pool->ctx, "No such buddy (%d)\n", chunk->resource_idx);
+ return;
+ }
+
+ mlx5hws_buddy_free_mem(buddy, chunk->offset, chunk->order);
+}
+
+static struct mlx5hws_buddy_mem *
+hws_pool_buddy_get_next_buddy(struct mlx5hws_pool *pool, int idx,
+ u32 order, bool *is_new_buddy)
+{
+ static struct mlx5hws_buddy_mem *buddy;
+ u32 new_buddy_size;
+
+ buddy = pool->db.buddy_manager->buddies[idx];
+ if (buddy)
+ return buddy;
+
+ new_buddy_size = max(pool->alloc_log_sz, order);
+ *is_new_buddy = true;
+ buddy = mlx5hws_buddy_create(new_buddy_size);
+ if (!buddy) {
+ mlx5hws_err(pool->ctx, "Failed to create buddy order: %d index: %d\n",
+ new_buddy_size, idx);
+ return NULL;
+ }
+
+ if (hws_pool_resource_alloc(pool, new_buddy_size, idx) != 0) {
+ mlx5hws_err(pool->ctx, "Failed to create resource type: %d: size %d index: %d\n",
+ pool->type, new_buddy_size, idx);
+ mlx5hws_buddy_cleanup(buddy);
+ return NULL;
+ }
+
+ pool->db.buddy_manager->buddies[idx] = buddy;
+
+ return buddy;
+}
+
+static int hws_pool_buddy_get_mem_chunk(struct mlx5hws_pool *pool,
+ int order,
+ u32 *buddy_idx,
+ int *seg)
+{
+ struct mlx5hws_buddy_mem *buddy;
+ bool new_mem = false;
+ int ret = 0;
+ int i;
+
+ *seg = -1;
+
+ /* Find the next free place from the buddy array */
+ while (*seg == -1) {
+ for (i = 0; i < MLX5HWS_POOL_RESOURCE_ARR_SZ; i++) {
+ buddy = hws_pool_buddy_get_next_buddy(pool, i,
+ order,
+ &new_mem);
+ if (!buddy) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ *seg = mlx5hws_buddy_alloc_mem(buddy, order);
+ if (*seg != -1)
+ goto found;
+
+ if (pool->flags & MLX5HWS_POOL_FLAGS_ONE_RESOURCE) {
+ mlx5hws_err(pool->ctx,
+ "Fail to allocate seg for one resource pool\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (new_mem) {
+ /* We have new memory pool, should be place for us */
+ mlx5hws_err(pool->ctx,
+ "No memory for order: %d with buddy no: %d\n",
+ order, i);
+ ret = -ENOMEM;
+ goto out;
+ }
+ }
+ }
+
+found:
+ *buddy_idx = i;
+out:
+ return ret;
+}
+
+static int hws_pool_buddy_db_get_chunk(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ int ret = 0;
+
+ /* Go over the buddies and find next free slot */
+ ret = hws_pool_buddy_get_mem_chunk(pool, chunk->order,
+ &chunk->resource_idx,
+ &chunk->offset);
+ if (ret)
+ mlx5hws_err(pool->ctx, "Failed to get free slot for chunk with order: %d\n",
+ chunk->order);
+
+ return ret;
+}
+
+static void hws_pool_buddy_db_uninit(struct mlx5hws_pool *pool)
+{
+ struct mlx5hws_buddy_mem *buddy;
+ int i;
+
+ for (i = 0; i < MLX5HWS_POOL_RESOURCE_ARR_SZ; i++) {
+ buddy = pool->db.buddy_manager->buddies[i];
+ if (buddy) {
+ mlx5hws_buddy_cleanup(buddy);
+ kfree(buddy);
+ pool->db.buddy_manager->buddies[i] = NULL;
+ }
+ }
+
+ kfree(pool->db.buddy_manager);
+}
+
+static int hws_pool_buddy_db_init(struct mlx5hws_pool *pool, u32 log_range)
+{
+ pool->db.buddy_manager = kzalloc(sizeof(*pool->db.buddy_manager), GFP_KERNEL);
+ if (!pool->db.buddy_manager)
+ return -ENOMEM;
+
+ if (pool->flags & MLX5HWS_POOL_FLAGS_ALLOC_MEM_ON_CREATE) {
+ bool new_buddy;
+
+ if (!hws_pool_buddy_get_next_buddy(pool, 0, log_range, &new_buddy)) {
+ mlx5hws_err(pool->ctx,
+ "Failed allocating memory on create log_sz: %d\n", log_range);
+ kfree(pool->db.buddy_manager);
+ return -ENOMEM;
+ }
+ }
+
+ pool->p_db_uninit = &hws_pool_buddy_db_uninit;
+ pool->p_get_chunk = &hws_pool_buddy_db_get_chunk;
+ pool->p_put_chunk = &hws_pool_buddy_db_put_chunk;
+
+ return 0;
+}
+
+static int hws_pool_create_resource_on_index(struct mlx5hws_pool *pool,
+ u32 alloc_size, int idx)
+{
+ int ret = hws_pool_resource_alloc(pool, alloc_size, idx);
+
+ if (ret) {
+ mlx5hws_err(pool->ctx, "Failed to create resource type: %d: size %d index: %d\n",
+ pool->type, alloc_size, idx);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct mlx5hws_pool_elements *
+hws_pool_element_create_new_elem(struct mlx5hws_pool *pool, u32 order, int idx)
+{
+ struct mlx5hws_pool_elements *elem;
+ u32 alloc_size;
+
+ alloc_size = pool->alloc_log_sz;
+
+ elem = kzalloc(sizeof(*elem), GFP_KERNEL);
+ if (!elem)
+ return NULL;
+
+ /* Sharing the same resource, also means that all the elements are with size 1 */
+ if ((pool->flags & MLX5HWS_POOL_FLAGS_FIXED_SIZE_OBJECTS) &&
+ !(pool->flags & MLX5HWS_POOL_FLAGS_RESOURCE_PER_CHUNK)) {
+ /* Currently all chunks in size 1 */
+ elem->bitmap = hws_pool_create_and_init_bitmap(alloc_size - order);
+ if (!elem->bitmap) {
+ mlx5hws_err(pool->ctx,
+ "Failed to create bitmap type: %d: size %d index: %d\n",
+ pool->type, alloc_size, idx);
+ goto free_elem;
+ }
+
+ elem->log_size = alloc_size - order;
+ }
+
+ if (hws_pool_create_resource_on_index(pool, alloc_size, idx)) {
+ mlx5hws_err(pool->ctx, "Failed to create resource type: %d: size %d index: %d\n",
+ pool->type, alloc_size, idx);
+ goto free_db;
+ }
+
+ pool->db.element_manager->elements[idx] = elem;
+
+ return elem;
+
+free_db:
+ bitmap_free(elem->bitmap);
+free_elem:
+ kfree(elem);
+ return NULL;
+}
+
+static int hws_pool_element_find_seg(struct mlx5hws_pool_elements *elem, int *seg)
+{
+ unsigned int segment, size;
+
+ size = 1 << elem->log_size;
+
+ segment = find_first_bit(elem->bitmap, size);
+ if (segment >= size) {
+ elem->is_full = true;
+ return -ENOMEM;
+ }
+
+ bitmap_clear(elem->bitmap, segment, 1);
+ *seg = segment;
+ return 0;
+}
+
+static int
+hws_pool_onesize_element_get_mem_chunk(struct mlx5hws_pool *pool, u32 order,
+ u32 *idx, int *seg)
+{
+ struct mlx5hws_pool_elements *elem;
+
+ elem = pool->db.element_manager->elements[0];
+ if (!elem)
+ elem = hws_pool_element_create_new_elem(pool, order, 0);
+ if (!elem)
+ goto err_no_elem;
+
+ if (hws_pool_element_find_seg(elem, seg) != 0) {
+ mlx5hws_err(pool->ctx, "No more resources (last request order: %d)\n", order);
+ return -ENOMEM;
+ }
+
+ *idx = 0;
+ elem->num_of_elements++;
+ return 0;
+
+err_no_elem:
+ mlx5hws_err(pool->ctx, "Failed to allocate element for order: %d\n", order);
+ return -ENOMEM;
+}
+
+static int
+hws_pool_general_element_get_mem_chunk(struct mlx5hws_pool *pool, u32 order,
+ u32 *idx, int *seg)
+{
+ int ret, i;
+
+ for (i = 0; i < MLX5HWS_POOL_RESOURCE_ARR_SZ; i++) {
+ if (!pool->resource[i]) {
+ ret = hws_pool_create_resource_on_index(pool, order, i);
+ if (ret)
+ goto err_no_res;
+ *idx = i;
+ *seg = 0; /* One memory slot in that element */
+ return 0;
+ }
+ }
+
+ mlx5hws_err(pool->ctx, "No more resources (last request order: %d)\n", order);
+ return -ENOMEM;
+
+err_no_res:
+ mlx5hws_err(pool->ctx, "Failed to allocate element for order: %d\n", order);
+ return -ENOMEM;
+}
+
+static int hws_pool_general_element_db_get_chunk(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ int ret;
+
+ /* Go over all memory elements and find/allocate free slot */
+ ret = hws_pool_general_element_get_mem_chunk(pool, chunk->order,
+ &chunk->resource_idx,
+ &chunk->offset);
+ if (ret)
+ mlx5hws_err(pool->ctx, "Failed to get free slot for chunk with order: %d\n",
+ chunk->order);
+
+ return ret;
+}
+
+static void hws_pool_general_element_db_put_chunk(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ if (unlikely(!pool->resource[chunk->resource_idx]))
+ pr_warn("HWS: invalid resource with index %d\n", chunk->resource_idx);
+
+ if (pool->flags & MLX5HWS_POOL_FLAGS_RELEASE_FREE_RESOURCE)
+ hws_pool_resource_free(pool, chunk->resource_idx);
+}
+
+static void hws_pool_general_element_db_uninit(struct mlx5hws_pool *pool)
+{
+ (void)pool;
+}
+
+/* This memory management works as the following:
+ * - At start doesn't allocate no mem at all.
+ * - When new request for chunk arrived:
+ * allocate resource and give it.
+ * - When free that chunk:
+ * the resource is freed.
+ */
+static int hws_pool_general_element_db_init(struct mlx5hws_pool *pool)
+{
+ pool->p_db_uninit = &hws_pool_general_element_db_uninit;
+ pool->p_get_chunk = &hws_pool_general_element_db_get_chunk;
+ pool->p_put_chunk = &hws_pool_general_element_db_put_chunk;
+
+ return 0;
+}
+
+static void hws_onesize_element_db_destroy_element(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_elements *elem,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ if (unlikely(!pool->resource[chunk->resource_idx]))
+ pr_warn("HWS: invalid resource with index %d\n", chunk->resource_idx);
+
+ hws_pool_resource_free(pool, chunk->resource_idx);
+ kfree(elem);
+ pool->db.element_manager->elements[chunk->resource_idx] = NULL;
+}
+
+static void hws_onesize_element_db_put_chunk(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ struct mlx5hws_pool_elements *elem;
+
+ if (unlikely(chunk->resource_idx))
+ pr_warn("HWS: invalid resource with index %d\n", chunk->resource_idx);
+
+ elem = pool->db.element_manager->elements[chunk->resource_idx];
+ if (!elem) {
+ mlx5hws_err(pool->ctx, "No such element (%d)\n", chunk->resource_idx);
+ return;
+ }
+
+ bitmap_set(elem->bitmap, chunk->offset, 1);
+ elem->is_full = false;
+ elem->num_of_elements--;
+
+ if (pool->flags & MLX5HWS_POOL_FLAGS_RELEASE_FREE_RESOURCE &&
+ !elem->num_of_elements)
+ hws_onesize_element_db_destroy_element(pool, elem, chunk);
+}
+
+static int hws_onesize_element_db_get_chunk(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ int ret = 0;
+
+ /* Go over all memory elements and find/allocate free slot */
+ ret = hws_pool_onesize_element_get_mem_chunk(pool, chunk->order,
+ &chunk->resource_idx,
+ &chunk->offset);
+ if (ret)
+ mlx5hws_err(pool->ctx, "Failed to get free slot for chunk with order: %d\n",
+ chunk->order);
+
+ return ret;
+}
+
+static void hws_onesize_element_db_uninit(struct mlx5hws_pool *pool)
+{
+ struct mlx5hws_pool_elements *elem;
+ int i;
+
+ for (i = 0; i < MLX5HWS_POOL_RESOURCE_ARR_SZ; i++) {
+ elem = pool->db.element_manager->elements[i];
+ if (elem) {
+ bitmap_free(elem->bitmap);
+ kfree(elem);
+ pool->db.element_manager->elements[i] = NULL;
+ }
+ }
+ kfree(pool->db.element_manager);
+}
+
+/* This memory management works as the following:
+ * - At start doesn't allocate no mem at all.
+ * - When new request for chunk arrived:
+ * aloocate the first and only slot of memory/resource
+ * when it ended return error.
+ */
+static int hws_pool_onesize_element_db_init(struct mlx5hws_pool *pool)
+{
+ pool->db.element_manager = kzalloc(sizeof(*pool->db.element_manager), GFP_KERNEL);
+ if (!pool->db.element_manager)
+ return -ENOMEM;
+
+ pool->p_db_uninit = &hws_onesize_element_db_uninit;
+ pool->p_get_chunk = &hws_onesize_element_db_get_chunk;
+ pool->p_put_chunk = &hws_onesize_element_db_put_chunk;
+
+ return 0;
+}
+
+static int hws_pool_db_init(struct mlx5hws_pool *pool,
+ enum mlx5hws_db_type db_type)
+{
+ int ret;
+
+ if (db_type == MLX5HWS_POOL_DB_TYPE_GENERAL_SIZE)
+ ret = hws_pool_general_element_db_init(pool);
+ else if (db_type == MLX5HWS_POOL_DB_TYPE_ONE_SIZE_RESOURCE)
+ ret = hws_pool_onesize_element_db_init(pool);
+ else
+ ret = hws_pool_buddy_db_init(pool, pool->alloc_log_sz);
+
+ if (ret) {
+ mlx5hws_err(pool->ctx, "Failed to init general db : %d (ret: %d)\n", db_type, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void hws_pool_db_unint(struct mlx5hws_pool *pool)
+{
+ pool->p_db_uninit(pool);
+}
+
+int mlx5hws_pool_chunk_alloc(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ int ret;
+
+ mutex_lock(&pool->lock);
+ ret = pool->p_get_chunk(pool, chunk);
+ mutex_unlock(&pool->lock);
+
+ return ret;
+}
+
+void mlx5hws_pool_chunk_free(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ mutex_lock(&pool->lock);
+ pool->p_put_chunk(pool, chunk);
+ mutex_unlock(&pool->lock);
+}
+
+struct mlx5hws_pool *
+mlx5hws_pool_create(struct mlx5hws_context *ctx, struct mlx5hws_pool_attr *pool_attr)
+{
+ enum mlx5hws_db_type res_db_type;
+ struct mlx5hws_pool *pool;
+
+ pool = kzalloc(sizeof(*pool), GFP_KERNEL);
+ if (!pool)
+ return NULL;
+
+ pool->ctx = ctx;
+ pool->type = pool_attr->pool_type;
+ pool->alloc_log_sz = pool_attr->alloc_log_sz;
+ pool->flags = pool_attr->flags;
+ pool->tbl_type = pool_attr->table_type;
+ pool->opt_type = pool_attr->opt_type;
+
+ /* Support general db */
+ if (pool->flags == (MLX5HWS_POOL_FLAGS_RELEASE_FREE_RESOURCE |
+ MLX5HWS_POOL_FLAGS_RESOURCE_PER_CHUNK))
+ res_db_type = MLX5HWS_POOL_DB_TYPE_GENERAL_SIZE;
+ else if (pool->flags == (MLX5HWS_POOL_FLAGS_ONE_RESOURCE |
+ MLX5HWS_POOL_FLAGS_FIXED_SIZE_OBJECTS))
+ res_db_type = MLX5HWS_POOL_DB_TYPE_ONE_SIZE_RESOURCE;
+ else
+ res_db_type = MLX5HWS_POOL_DB_TYPE_BUDDY;
+
+ pool->alloc_log_sz = pool_attr->alloc_log_sz;
+
+ if (hws_pool_db_init(pool, res_db_type))
+ goto free_pool;
+
+ mutex_init(&pool->lock);
+
+ return pool;
+
+free_pool:
+ kfree(pool);
+ return NULL;
+}
+
+int mlx5hws_pool_destroy(struct mlx5hws_pool *pool)
+{
+ int i;
+
+ mutex_destroy(&pool->lock);
+
+ for (i = 0; i < MLX5HWS_POOL_RESOURCE_ARR_SZ; i++)
+ if (pool->resource[i])
+ hws_pool_resource_free(pool, i);
+
+ hws_pool_db_unint(pool);
+
+ kfree(pool);
+ return 0;
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pool.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pool.h
new file mode 100644
index 000000000000..621298b352b2
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pool.h
@@ -0,0 +1,151 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
+
+#ifndef MLX5HWS_POOL_H_
+#define MLX5HWS_POOL_H_
+
+#define MLX5HWS_POOL_STC_LOG_SZ 15
+
+#define MLX5HWS_POOL_RESOURCE_ARR_SZ 100
+
+enum mlx5hws_pool_type {
+ MLX5HWS_POOL_TYPE_STE,
+ MLX5HWS_POOL_TYPE_STC,
+};
+
+struct mlx5hws_pool_chunk {
+ u32 resource_idx;
+ /* Internal offset, relative to base index */
+ int offset;
+ int order;
+};
+
+struct mlx5hws_pool_resource {
+ struct mlx5hws_pool *pool;
+ u32 base_id;
+ u32 range;
+};
+
+enum mlx5hws_pool_flags {
+ /* Only a one resource in that pool */
+ MLX5HWS_POOL_FLAGS_ONE_RESOURCE = 1 << 0,
+ MLX5HWS_POOL_FLAGS_RELEASE_FREE_RESOURCE = 1 << 1,
+ /* No sharing resources between chunks */
+ MLX5HWS_POOL_FLAGS_RESOURCE_PER_CHUNK = 1 << 2,
+ /* All objects are in the same size */
+ MLX5HWS_POOL_FLAGS_FIXED_SIZE_OBJECTS = 1 << 3,
+ /* Managed by buddy allocator */
+ MLX5HWS_POOL_FLAGS_BUDDY_MANAGED = 1 << 4,
+ /* Allocate pool_type memory on pool creation */
+ MLX5HWS_POOL_FLAGS_ALLOC_MEM_ON_CREATE = 1 << 5,
+
+ /* These values should be used by the caller */
+ MLX5HWS_POOL_FLAGS_FOR_STC_POOL =
+ MLX5HWS_POOL_FLAGS_ONE_RESOURCE |
+ MLX5HWS_POOL_FLAGS_FIXED_SIZE_OBJECTS,
+ MLX5HWS_POOL_FLAGS_FOR_MATCHER_STE_POOL =
+ MLX5HWS_POOL_FLAGS_RELEASE_FREE_RESOURCE |
+ MLX5HWS_POOL_FLAGS_RESOURCE_PER_CHUNK,
+ MLX5HWS_POOL_FLAGS_FOR_STE_ACTION_POOL =
+ MLX5HWS_POOL_FLAGS_ONE_RESOURCE |
+ MLX5HWS_POOL_FLAGS_BUDDY_MANAGED |
+ MLX5HWS_POOL_FLAGS_ALLOC_MEM_ON_CREATE,
+};
+
+enum mlx5hws_pool_optimize {
+ MLX5HWS_POOL_OPTIMIZE_NONE = 0x0,
+ MLX5HWS_POOL_OPTIMIZE_ORIG = 0x1,
+ MLX5HWS_POOL_OPTIMIZE_MIRROR = 0x2,
+};
+
+struct mlx5hws_pool_attr {
+ enum mlx5hws_pool_type pool_type;
+ enum mlx5hws_table_type table_type;
+ enum mlx5hws_pool_flags flags;
+ enum mlx5hws_pool_optimize opt_type;
+ /* Allocation size once memory is depleted */
+ size_t alloc_log_sz;
+};
+
+enum mlx5hws_db_type {
+ /* Uses for allocating chunk of big memory, each element has its own resource in the FW*/
+ MLX5HWS_POOL_DB_TYPE_GENERAL_SIZE,
+ /* One resource only, all the elements are with same one size */
+ MLX5HWS_POOL_DB_TYPE_ONE_SIZE_RESOURCE,
+ /* Many resources, the memory allocated with buddy mechanism */
+ MLX5HWS_POOL_DB_TYPE_BUDDY,
+};
+
+struct mlx5hws_buddy_manager {
+ struct mlx5hws_buddy_mem *buddies[MLX5HWS_POOL_RESOURCE_ARR_SZ];
+};
+
+struct mlx5hws_pool_elements {
+ u32 num_of_elements;
+ unsigned long *bitmap;
+ u32 log_size;
+ bool is_full;
+};
+
+struct mlx5hws_element_manager {
+ struct mlx5hws_pool_elements *elements[MLX5HWS_POOL_RESOURCE_ARR_SZ];
+};
+
+struct mlx5hws_pool_db {
+ enum mlx5hws_db_type type;
+ union {
+ struct mlx5hws_element_manager *element_manager;
+ struct mlx5hws_buddy_manager *buddy_manager;
+ };
+};
+
+typedef int (*mlx5hws_pool_db_get_chunk)(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk);
+typedef void (*mlx5hws_pool_db_put_chunk)(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk);
+typedef void (*mlx5hws_pool_unint_db)(struct mlx5hws_pool *pool);
+
+struct mlx5hws_pool {
+ struct mlx5hws_context *ctx;
+ enum mlx5hws_pool_type type;
+ enum mlx5hws_pool_flags flags;
+ struct mutex lock; /* protect the pool */
+ size_t alloc_log_sz;
+ enum mlx5hws_table_type tbl_type;
+ enum mlx5hws_pool_optimize opt_type;
+ struct mlx5hws_pool_resource *resource[MLX5HWS_POOL_RESOURCE_ARR_SZ];
+ struct mlx5hws_pool_resource *mirror_resource[MLX5HWS_POOL_RESOURCE_ARR_SZ];
+ /* DB */
+ struct mlx5hws_pool_db db;
+ /* Functions */
+ mlx5hws_pool_unint_db p_db_uninit;
+ mlx5hws_pool_db_get_chunk p_get_chunk;
+ mlx5hws_pool_db_put_chunk p_put_chunk;
+};
+
+struct mlx5hws_pool *
+mlx5hws_pool_create(struct mlx5hws_context *ctx,
+ struct mlx5hws_pool_attr *pool_attr);
+
+int mlx5hws_pool_destroy(struct mlx5hws_pool *pool);
+
+int mlx5hws_pool_chunk_alloc(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk);
+
+void mlx5hws_pool_chunk_free(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk);
+
+static inline u32
+mlx5hws_pool_chunk_get_base_id(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ return pool->resource[chunk->resource_idx]->base_id;
+}
+
+static inline u32
+mlx5hws_pool_chunk_get_base_mirror_id(struct mlx5hws_pool *pool,
+ struct mlx5hws_pool_chunk *chunk)
+{
+ return pool->mirror_resource[chunk->resource_idx]->base_id;
+}
+#endif /* MLX5HWS_POOL_H_ */
--
2.46.0
Powered by blists - more mailing lists