--- /dev/null
+/*
+ * Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * 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.
+ */
+
+#include <linux/export.h>
+#include <linux/mlx5/driver.h>
+#include <linux/mlx5/flow_table.h>
+#include "mlx5_core.h"
+
+struct mlx5_ftg {
+ struct mlx5_flow_table_group g;
+ u32 id;
+ u32 start_ix;
+};
+
+struct mlx5_flow_table {
+ struct mlx5_core_dev *dev;
+ u8 level;
+ u8 type;
+ u32 id;
+ struct mutex mutex; /* sync bitmap alloc */
+ u16 num_groups;
+ struct mlx5_ftg *group;
+ unsigned long *bitmap;
+ u32 size;
+};
+
+static int mlx5_set_flow_entry_cmd(struct mlx5_flow_table *ft, u32 group_ix,
+ u32 flow_index, void *flow_context)
+{
+ u32 out[MLX5_ST_SZ_DW(set_fte_out)];
+ u32 *in;
+ void *in_flow_context;
+ int fcdls =
+ MLX5_GET(flow_context, flow_context, destination_list_size) *
+ MLX5_ST_SZ_BYTES(dest_format_struct);
+ int inlen = MLX5_ST_SZ_BYTES(set_fte_in) + fcdls;
+ int err;
+
+ in = mlx5_vzalloc(inlen);
+ if (!in) {
+ mlx5_core_warn(ft->dev, "failed to allocate inbox\n");
+ return -ENOMEM;
+ }
+
+ MLX5_SET(set_fte_in, in, table_type, ft->type);
+ MLX5_SET(set_fte_in, in, table_id, ft->id);
+ MLX5_SET(set_fte_in, in, flow_index, flow_index);
+ MLX5_SET(set_fte_in, in, opcode, MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY);
+
+ in_flow_context = MLX5_ADDR_OF(set_fte_in, in, flow_context);
+ memcpy(in_flow_context, flow_context,
+ MLX5_ST_SZ_BYTES(flow_context) + fcdls);
+
+ MLX5_SET(flow_context, in_flow_context, group_id,
+ ft->group[group_ix].id);
+
+ memset(out, 0, sizeof(out));
+ err = mlx5_cmd_exec_check_status(ft->dev, in, inlen, out,
+ sizeof(out));
+ kvfree(in);
+
+ return err;
+}
+
+static void mlx5_del_flow_entry_cmd(struct mlx5_flow_table *ft, u32 flow_index)
+{
+ u32 in[MLX5_ST_SZ_DW(delete_fte_in)];
+ u32 out[MLX5_ST_SZ_DW(delete_fte_out)];
+
+ memset(in, 0, sizeof(in));
+ memset(out, 0, sizeof(out));
+
+#define MLX5_SET_DFTEI(p, x, v) MLX5_SET(delete_fte_in, p, x, v)
+ MLX5_SET_DFTEI(in, table_type, ft->type);
+ MLX5_SET_DFTEI(in, table_id, ft->id);
+ MLX5_SET_DFTEI(in, flow_index, flow_index);
+ MLX5_SET_DFTEI(in, opcode, MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
+
+ mlx5_cmd_exec_check_status(ft->dev, in, sizeof(in), out, sizeof(out));
+}
+
+static void mlx5_destroy_flow_group_cmd(struct mlx5_flow_table *ft, int i)
+{
+ u32 in[MLX5_ST_SZ_DW(destroy_flow_group_in)];
+ u32 out[MLX5_ST_SZ_DW(destroy_flow_group_out)];
+
+ memset(in, 0, sizeof(in));
+ memset(out, 0, sizeof(out));
+
+#define MLX5_SET_DFGI(p, x, v) MLX5_SET(destroy_flow_group_in, p, x, v)
+ MLX5_SET_DFGI(in, table_type, ft->type);
+ MLX5_SET_DFGI(in, table_id, ft->id);
+ MLX5_SET_DFGI(in, opcode, MLX5_CMD_OP_DESTROY_FLOW_GROUP);
+ MLX5_SET_DFGI(in, group_id, ft->group[i].id);
+ mlx5_cmd_exec_check_status(ft->dev, in, sizeof(in), out, sizeof(out));
+}
+
+static int mlx5_create_flow_group_cmd(struct mlx5_flow_table *ft, int i)
+{
+ u32 out[MLX5_ST_SZ_DW(create_flow_group_out)];
+ u32 *in;
+ void *in_match_criteria;
+ int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
+ struct mlx5_flow_table_group *g = &ft->group[i].g;
+ u32 start_ix = ft->group[i].start_ix;
+ u32 end_ix = start_ix + (1 << g->log_sz) - 1;
+ int err;
+
+ in = mlx5_vzalloc(inlen);
+ if (!in) {
+ mlx5_core_warn(ft->dev, "failed to allocate inbox\n");
+ return -ENOMEM;
+ }
+ in_match_criteria = MLX5_ADDR_OF(create_flow_group_in, in,
+ match_criteria);
+
+ memset(out, 0, sizeof(out));
+
+#define MLX5_SET_CFGI(p, x, v) MLX5_SET(create_flow_group_in, p, x, v)
+ MLX5_SET_CFGI(in, table_type, ft->type);
+ MLX5_SET_CFGI(in, table_id, ft->id);
+ MLX5_SET_CFGI(in, opcode, MLX5_CMD_OP_CREATE_FLOW_GROUP);
+ MLX5_SET_CFGI(in, start_flow_index, start_ix);
+ MLX5_SET_CFGI(in, end_flow_index, end_ix);
+ MLX5_SET_CFGI(in, match_criteria_enable, g->match_criteria_enable);
+
+ memcpy(in_match_criteria, g->match_criteria,
+ MLX5_ST_SZ_BYTES(fte_match_param));
+
+ err = mlx5_cmd_exec_check_status(ft->dev, in, inlen, out,
+ sizeof(out));
+ if (!err)
+ ft->group[i].id = MLX5_GET(create_flow_group_out, out,
+ group_id);
+
+ kvfree(in);
+
+ return err;
+}
+
+static void mlx5_destroy_flow_table_groups(struct mlx5_flow_table *ft)
+{
+ int i;
+
+ for (i = 0; i < ft->num_groups; i++)
+ mlx5_destroy_flow_group_cmd(ft, i);
+}
+
+static int mlx5_create_flow_table_groups(struct mlx5_flow_table *ft)
+{
+ int err;
+ int i;
+
+ for (i = 0; i < ft->num_groups; i++) {
+ err = mlx5_create_flow_group_cmd(ft, i);
+ if (err)
+ goto err_destroy_flow_table_groups;
+ }
+
+ return 0;
+
+err_destroy_flow_table_groups:
+ for (i--; i >= 0; i--)
+ mlx5_destroy_flow_group_cmd(ft, i);
+
+ return err;
+}
+
+static int mlx5_create_flow_table_cmd(struct mlx5_flow_table *ft)
+{
+ u32 in[MLX5_ST_SZ_DW(create_flow_table_in)];
+ u32 out[MLX5_ST_SZ_DW(create_flow_table_out)];
+ int err;
+
+ memset(in, 0, sizeof(in));
+
+ MLX5_SET(create_flow_table_in, in, table_type, ft->type);
+ MLX5_SET(create_flow_table_in, in, level, ft->level);
+ MLX5_SET(create_flow_table_in, in, log_size, order_base_2(ft->size));
+
+ MLX5_SET(create_flow_table_in, in, opcode,
+ MLX5_CMD_OP_CREATE_FLOW_TABLE);
+
+ memset(out, 0, sizeof(out));
+ err = mlx5_cmd_exec_check_status(ft->dev, in, sizeof(in), out,
+ sizeof(out));
+ if (err)
+ return err;
+
+ ft->id = MLX5_GET(create_flow_table_out, out, table_id);
+
+ return 0;
+}
+
+static void mlx5_destroy_flow_table_cmd(struct mlx5_flow_table *ft)
+{
+ u32 in[MLX5_ST_SZ_DW(destroy_flow_table_in)];
+ u32 out[MLX5_ST_SZ_DW(destroy_flow_table_out)];
+
+ memset(in, 0, sizeof(in));
+ memset(out, 0, sizeof(out));
+
+#define MLX5_SET_DFTI(p, x, v) MLX5_SET(destroy_flow_table_in, p, x, v)
+ MLX5_SET_DFTI(in, table_type, ft->type);
+ MLX5_SET_DFTI(in, table_id, ft->id);
+ MLX5_SET_DFTI(in, opcode, MLX5_CMD_OP_DESTROY_FLOW_TABLE);
+
+ mlx5_cmd_exec_check_status(ft->dev, in, sizeof(in), out, sizeof(out));
+}
+
+static int mlx5_find_group(struct mlx5_flow_table *ft, u8 match_criteria_enable,
+ u32 *match_criteria, int *group_ix)
+{
+ void *mc_outer = MLX5_ADDR_OF(fte_match_param, match_criteria,
+ outer_headers);
+ void *mc_misc = MLX5_ADDR_OF(fte_match_param, match_criteria,
+ misc_parameters);
+ void *mc_inner = MLX5_ADDR_OF(fte_match_param, match_criteria,
+ inner_headers);
+ int mc_outer_sz = MLX5_ST_SZ_BYTES(fte_match_set_lyr_2_4);
+ int mc_misc_sz = MLX5_ST_SZ_BYTES(fte_match_set_misc);
+ int mc_inner_sz = MLX5_ST_SZ_BYTES(fte_match_set_lyr_2_4);
+ int i;
+
+ for (i = 0; i < ft->num_groups; i++) {
+ struct mlx5_flow_table_group *g = &ft->group[i].g;
+ void *gmc_outer = MLX5_ADDR_OF(fte_match_param,
+ g->match_criteria,
+ outer_headers);
+ void *gmc_misc = MLX5_ADDR_OF(fte_match_param,
+ g->match_criteria,
+ misc_parameters);
+ void *gmc_inner = MLX5_ADDR_OF(fte_match_param,
+ g->match_criteria,
+ inner_headers);
+
+ if (g->match_criteria_enable != match_criteria_enable)
+ continue;
+
+ if (match_criteria_enable & MLX5_MATCH_OUTER_HEADERS)
+ if (memcmp(mc_outer, gmc_outer, mc_outer_sz))
+ continue;
+
+ if (match_criteria_enable & MLX5_MATCH_MISC_PARAMETERS)
+ if (memcmp(mc_misc, gmc_misc, mc_misc_sz))
+ continue;
+
+ if (match_criteria_enable & MLX5_MATCH_INNER_HEADERS)
+ if (memcmp(mc_inner, gmc_inner, mc_inner_sz))
+ continue;
+
+ *group_ix = i;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int alloc_flow_index(struct mlx5_flow_table *ft, int group_ix, u32 *ix)
+{
+ struct mlx5_ftg *g = &ft->group[group_ix];
+ int err = 0;
+
+ mutex_lock(&ft->mutex);
+
+ *ix = find_next_zero_bit(ft->bitmap, ft->size, g->start_ix);
+ if (*ix >= (g->start_ix + (1 << g->g.log_sz)))
+ err = -ENOSPC;
+ else
+ __set_bit(*ix, ft->bitmap);
+
+ mutex_unlock(&ft->mutex);
+
+ return err;
+}
+
+static void mlx5_free_flow_index(struct mlx5_flow_table *ft, u32 ix)
+{
+ __clear_bit(ix, ft->bitmap);
+}
+
+int mlx5_add_flow_table_entry(void *flow_table, u8 match_criteria_enable,
+ void *match_criteria, void *flow_context,
+ u32 *flow_index)
+{
+ struct mlx5_flow_table *ft = flow_table;
+ int group_ix;
+ int err;
+
+ err = mlx5_find_group(ft, match_criteria_enable, match_criteria,
+ &group_ix);
+ if (err) {
+ mlx5_core_warn(ft->dev, "mlx5_find_group failed\n");
+ return err;
+ }
+
+ err = alloc_flow_index(ft, group_ix, flow_index);
+ if (err) {
+ mlx5_core_warn(ft->dev, "alloc_flow_index failed\n");
+ return err;
+ }
+
+ return mlx5_set_flow_entry_cmd(ft, group_ix, *flow_index, flow_context);
+}
+EXPORT_SYMBOL(mlx5_add_flow_table_entry);
+
+void mlx5_del_flow_table_entry(void *flow_table, u32 flow_index)
+{
+ struct mlx5_flow_table *ft = flow_table;
+
+ mlx5_del_flow_entry_cmd(ft, flow_index);
+ mlx5_free_flow_index(ft, flow_index);
+}
+EXPORT_SYMBOL(mlx5_del_flow_table_entry);
+
+void *mlx5_create_flow_table(struct mlx5_core_dev *dev, u8 level, u8 table_type,
+ u16 num_groups,
+ struct mlx5_flow_table_group *group)
+{
+ struct mlx5_flow_table *ft;
+ u32 start_ix = 0;
+ u32 ft_size = 0;
+ void *gr;
+ void *bm;
+ int err;
+ int i;
+
+ for (i = 0; i < num_groups; i++)
+ ft_size += (1 << group[i].log_sz);
+
+ ft = kzalloc(sizeof(*ft), GFP_KERNEL);
+ gr = kcalloc(num_groups, sizeof(struct mlx5_ftg), GFP_KERNEL);
+ bm = kcalloc(BITS_TO_LONGS(ft_size), sizeof(uintptr_t), GFP_KERNEL);
+ if (!ft || !gr || !bm)
+ goto err_free_ft;
+
+ ft->group = gr;
+ ft->bitmap = bm;
+ ft->num_groups = num_groups;
+ ft->level = level;
+ ft->type = table_type;
+ ft->size = ft_size;
+ ft->dev = dev;
+ mutex_init(&ft->mutex);
+
+ for (i = 0; i < ft->num_groups; i++) {
+ memcpy(&ft->group[i].g, &group[i], sizeof(*group));
+ ft->group[i].start_ix = start_ix;
+ start_ix += 1 << group[i].log_sz;
+ }
+
+ err = mlx5_create_flow_table_cmd(ft);
+ if (err)
+ goto err_free_ft;
+
+ err = mlx5_create_flow_table_groups(ft);
+ if (err)
+ goto err_destroy_flow_table_cmd;
+
+ return ft;
+
+err_destroy_flow_table_cmd:
+ mlx5_destroy_flow_table_cmd(ft);
+
+err_free_ft:
+ mlx5_core_warn(dev, "failed to alloc flow table\n");
+ kfree(bm);
+ kfree(gr);
+ kfree(ft);
+
+ return NULL;
+}
+EXPORT_SYMBOL(mlx5_create_flow_table);
+
+void mlx5_destroy_flow_table(void *flow_table)
+{
+ struct mlx5_flow_table *ft = flow_table;
+
+ mlx5_destroy_flow_table_groups(ft);
+ mlx5_destroy_flow_table_cmd(ft);
+ kfree(ft->bitmap);
+ kfree(ft->group);
+ kfree(ft);
+}
+EXPORT_SYMBOL(mlx5_destroy_flow_table);
+
+u32 mlx5_get_flow_table_id(void *flow_table)
+{
+ struct mlx5_flow_table *ft = flow_table;
+
+ return ft->id;
+}
+EXPORT_SYMBOL(mlx5_get_flow_table_id);
Code Review / kvmfornfv.git / blobdiff