407 lines
10 KiB
C
407 lines
10 KiB
C
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// SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
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/* Copyright (c) 2017 - 2021 Intel Corporation */
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#include "osdep.h"
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#include "hmc.h"
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#include "defs.h"
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#include "type.h"
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#include "protos.h"
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#include "ws.h"
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/**
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* irdma_alloc_node - Allocate a WS node and init
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* @vsi: vsi pointer
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* @user_pri: user priority
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* @node_type: Type of node, leaf or parent
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* @parent: parent node pointer
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*/
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static struct irdma_ws_node *irdma_alloc_node(struct irdma_sc_vsi *vsi,
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u8 user_pri,
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enum irdma_ws_node_type node_type,
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struct irdma_ws_node *parent)
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{
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struct irdma_virt_mem ws_mem;
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struct irdma_ws_node *node;
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u16 node_index = 0;
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ws_mem.size = sizeof(struct irdma_ws_node);
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ws_mem.va = kzalloc(ws_mem.size, GFP_KERNEL);
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if (!ws_mem.va)
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return NULL;
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if (parent) {
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node_index = irdma_alloc_ws_node_id(vsi->dev);
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if (node_index == IRDMA_WS_NODE_INVALID) {
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kfree(ws_mem.va);
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return NULL;
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}
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}
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node = ws_mem.va;
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node->index = node_index;
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node->vsi_index = vsi->vsi_idx;
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INIT_LIST_HEAD(&node->child_list_head);
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if (node_type == WS_NODE_TYPE_LEAF) {
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node->type_leaf = true;
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node->traffic_class = vsi->qos[user_pri].traffic_class;
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node->user_pri = user_pri;
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node->rel_bw = vsi->qos[user_pri].rel_bw;
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if (!node->rel_bw)
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node->rel_bw = 1;
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node->lan_qs_handle = vsi->qos[user_pri].lan_qos_handle;
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node->prio_type = IRDMA_PRIO_WEIGHTED_RR;
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} else {
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node->rel_bw = 1;
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node->prio_type = IRDMA_PRIO_WEIGHTED_RR;
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node->enable = true;
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}
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node->parent = parent;
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return node;
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}
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/**
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* irdma_free_node - Free a WS node
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* @vsi: VSI stricture of device
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* @node: Pointer to node to free
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*/
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static void irdma_free_node(struct irdma_sc_vsi *vsi,
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struct irdma_ws_node *node)
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{
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struct irdma_virt_mem ws_mem;
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if (node->index)
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irdma_free_ws_node_id(vsi->dev, node->index);
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ws_mem.va = node;
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ws_mem.size = sizeof(struct irdma_ws_node);
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kfree(ws_mem.va);
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}
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/**
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* irdma_ws_cqp_cmd - Post CQP work scheduler node cmd
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* @vsi: vsi pointer
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* @node: pointer to node
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* @cmd: add, remove or modify
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*/
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static int irdma_ws_cqp_cmd(struct irdma_sc_vsi *vsi,
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struct irdma_ws_node *node, u8 cmd)
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{
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struct irdma_ws_node_info node_info = {};
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node_info.id = node->index;
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node_info.vsi = node->vsi_index;
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if (node->parent)
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node_info.parent_id = node->parent->index;
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else
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node_info.parent_id = node_info.id;
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node_info.weight = node->rel_bw;
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node_info.tc = node->traffic_class;
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node_info.prio_type = node->prio_type;
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node_info.type_leaf = node->type_leaf;
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node_info.enable = node->enable;
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if (irdma_cqp_ws_node_cmd(vsi->dev, cmd, &node_info)) {
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ibdev_dbg(to_ibdev(vsi->dev), "WS: CQP WS CMD failed\n");
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return -ENOMEM;
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}
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if (node->type_leaf && cmd == IRDMA_OP_WS_ADD_NODE) {
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node->qs_handle = node_info.qs_handle;
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vsi->qos[node->user_pri].qs_handle = node_info.qs_handle;
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}
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return 0;
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}
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/**
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* ws_find_node - Find SC WS node based on VSI id or TC
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* @parent: parent node of First VSI or TC node
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* @match_val: value to match
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* @type: match type VSI/TC
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*/
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static struct irdma_ws_node *ws_find_node(struct irdma_ws_node *parent,
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u16 match_val,
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enum irdma_ws_match_type type)
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{
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struct irdma_ws_node *node;
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switch (type) {
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case WS_MATCH_TYPE_VSI:
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list_for_each_entry(node, &parent->child_list_head, siblings) {
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if (node->vsi_index == match_val)
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return node;
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}
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break;
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case WS_MATCH_TYPE_TC:
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list_for_each_entry(node, &parent->child_list_head, siblings) {
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if (node->traffic_class == match_val)
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return node;
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}
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break;
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default:
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break;
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}
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return NULL;
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}
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/**
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* irdma_tc_in_use - Checks to see if a leaf node is in use
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* @vsi: vsi pointer
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* @user_pri: user priority
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*/
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static bool irdma_tc_in_use(struct irdma_sc_vsi *vsi, u8 user_pri)
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{
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int i;
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mutex_lock(&vsi->qos[user_pri].qos_mutex);
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if (!list_empty(&vsi->qos[user_pri].qplist)) {
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mutex_unlock(&vsi->qos[user_pri].qos_mutex);
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return true;
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}
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/* Check if the traffic class associated with the given user priority
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* is in use by any other user priority. If so, nothing left to do
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*/
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for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) {
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if (vsi->qos[i].traffic_class == vsi->qos[user_pri].traffic_class &&
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!list_empty(&vsi->qos[i].qplist)) {
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mutex_unlock(&vsi->qos[user_pri].qos_mutex);
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return true;
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}
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}
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mutex_unlock(&vsi->qos[user_pri].qos_mutex);
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return false;
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}
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/**
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* irdma_remove_leaf - Remove leaf node unconditionally
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* @vsi: vsi pointer
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* @user_pri: user priority
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*/
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static void irdma_remove_leaf(struct irdma_sc_vsi *vsi, u8 user_pri)
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{
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struct irdma_ws_node *ws_tree_root, *vsi_node, *tc_node;
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int i;
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u16 traffic_class;
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traffic_class = vsi->qos[user_pri].traffic_class;
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for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++)
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if (vsi->qos[i].traffic_class == traffic_class)
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vsi->qos[i].valid = false;
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ws_tree_root = vsi->dev->ws_tree_root;
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if (!ws_tree_root)
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return;
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vsi_node = ws_find_node(ws_tree_root, vsi->vsi_idx,
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WS_MATCH_TYPE_VSI);
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if (!vsi_node)
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return;
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tc_node = ws_find_node(vsi_node,
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vsi->qos[user_pri].traffic_class,
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WS_MATCH_TYPE_TC);
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if (!tc_node)
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return;
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irdma_ws_cqp_cmd(vsi, tc_node, IRDMA_OP_WS_DELETE_NODE);
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vsi->unregister_qset(vsi, tc_node);
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list_del(&tc_node->siblings);
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irdma_free_node(vsi, tc_node);
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/* Check if VSI node can be freed */
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if (list_empty(&vsi_node->child_list_head)) {
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irdma_ws_cqp_cmd(vsi, vsi_node, IRDMA_OP_WS_DELETE_NODE);
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list_del(&vsi_node->siblings);
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irdma_free_node(vsi, vsi_node);
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/* Free head node there are no remaining VSI nodes */
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if (list_empty(&ws_tree_root->child_list_head)) {
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irdma_ws_cqp_cmd(vsi, ws_tree_root,
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IRDMA_OP_WS_DELETE_NODE);
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irdma_free_node(vsi, ws_tree_root);
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vsi->dev->ws_tree_root = NULL;
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}
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}
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}
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/**
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* irdma_ws_add - Build work scheduler tree, set RDMA qs_handle
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* @vsi: vsi pointer
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* @user_pri: user priority
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*/
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int irdma_ws_add(struct irdma_sc_vsi *vsi, u8 user_pri)
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{
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struct irdma_ws_node *ws_tree_root;
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struct irdma_ws_node *vsi_node;
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struct irdma_ws_node *tc_node;
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u16 traffic_class;
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int ret = 0;
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int i;
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mutex_lock(&vsi->dev->ws_mutex);
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if (vsi->tc_change_pending) {
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ret = -EBUSY;
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goto exit;
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}
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if (vsi->qos[user_pri].valid)
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goto exit;
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ws_tree_root = vsi->dev->ws_tree_root;
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if (!ws_tree_root) {
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ibdev_dbg(to_ibdev(vsi->dev), "WS: Creating root node\n");
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ws_tree_root = irdma_alloc_node(vsi, user_pri,
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WS_NODE_TYPE_PARENT, NULL);
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if (!ws_tree_root) {
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ret = -ENOMEM;
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goto exit;
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}
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ret = irdma_ws_cqp_cmd(vsi, ws_tree_root, IRDMA_OP_WS_ADD_NODE);
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if (ret) {
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irdma_free_node(vsi, ws_tree_root);
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goto exit;
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}
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vsi->dev->ws_tree_root = ws_tree_root;
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}
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/* Find a second tier node that matches the VSI */
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vsi_node = ws_find_node(ws_tree_root, vsi->vsi_idx,
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WS_MATCH_TYPE_VSI);
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/* If VSI node doesn't exist, add one */
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if (!vsi_node) {
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ibdev_dbg(to_ibdev(vsi->dev),
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"WS: Node not found matching VSI %d\n",
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vsi->vsi_idx);
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vsi_node = irdma_alloc_node(vsi, user_pri, WS_NODE_TYPE_PARENT,
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ws_tree_root);
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if (!vsi_node) {
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ret = -ENOMEM;
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goto vsi_add_err;
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}
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ret = irdma_ws_cqp_cmd(vsi, vsi_node, IRDMA_OP_WS_ADD_NODE);
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if (ret) {
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irdma_free_node(vsi, vsi_node);
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goto vsi_add_err;
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}
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list_add(&vsi_node->siblings, &ws_tree_root->child_list_head);
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}
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ibdev_dbg(to_ibdev(vsi->dev),
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"WS: Using node %d which represents VSI %d\n",
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vsi_node->index, vsi->vsi_idx);
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traffic_class = vsi->qos[user_pri].traffic_class;
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tc_node = ws_find_node(vsi_node, traffic_class,
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WS_MATCH_TYPE_TC);
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if (!tc_node) {
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/* Add leaf node */
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ibdev_dbg(to_ibdev(vsi->dev),
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"WS: Node not found matching VSI %d and TC %d\n",
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vsi->vsi_idx, traffic_class);
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tc_node = irdma_alloc_node(vsi, user_pri, WS_NODE_TYPE_LEAF,
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vsi_node);
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if (!tc_node) {
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ret = -ENOMEM;
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goto leaf_add_err;
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}
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ret = irdma_ws_cqp_cmd(vsi, tc_node, IRDMA_OP_WS_ADD_NODE);
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if (ret) {
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irdma_free_node(vsi, tc_node);
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goto leaf_add_err;
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}
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list_add(&tc_node->siblings, &vsi_node->child_list_head);
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/*
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* callback to LAN to update the LAN tree with our node
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*/
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ret = vsi->register_qset(vsi, tc_node);
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if (ret)
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goto reg_err;
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tc_node->enable = true;
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ret = irdma_ws_cqp_cmd(vsi, tc_node, IRDMA_OP_WS_MODIFY_NODE);
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if (ret) {
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vsi->unregister_qset(vsi, tc_node);
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goto reg_err;
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}
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}
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ibdev_dbg(to_ibdev(vsi->dev),
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"WS: Using node %d which represents VSI %d TC %d\n",
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tc_node->index, vsi->vsi_idx, traffic_class);
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/*
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* Iterate through other UPs and update the QS handle if they have
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* a matching traffic class.
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*/
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for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) {
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if (vsi->qos[i].traffic_class == traffic_class) {
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vsi->qos[i].qs_handle = tc_node->qs_handle;
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vsi->qos[i].lan_qos_handle = tc_node->lan_qs_handle;
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vsi->qos[i].l2_sched_node_id = tc_node->l2_sched_node_id;
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vsi->qos[i].valid = true;
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}
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}
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goto exit;
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reg_err:
|
||
|
|
irdma_ws_cqp_cmd(vsi, tc_node, IRDMA_OP_WS_DELETE_NODE);
|
||
|
|
list_del(&tc_node->siblings);
|
||
|
|
irdma_free_node(vsi, tc_node);
|
||
|
|
leaf_add_err:
|
||
|
|
if (list_empty(&vsi_node->child_list_head)) {
|
||
|
|
if (irdma_ws_cqp_cmd(vsi, vsi_node, IRDMA_OP_WS_DELETE_NODE))
|
||
|
|
goto exit;
|
||
|
|
list_del(&vsi_node->siblings);
|
||
|
|
irdma_free_node(vsi, vsi_node);
|
||
|
|
}
|
||
|
|
|
||
|
|
vsi_add_err:
|
||
|
|
/* Free head node there are no remaining VSI nodes */
|
||
|
|
if (list_empty(&ws_tree_root->child_list_head)) {
|
||
|
|
irdma_ws_cqp_cmd(vsi, ws_tree_root, IRDMA_OP_WS_DELETE_NODE);
|
||
|
|
vsi->dev->ws_tree_root = NULL;
|
||
|
|
irdma_free_node(vsi, ws_tree_root);
|
||
|
|
}
|
||
|
|
|
||
|
|
exit:
|
||
|
|
mutex_unlock(&vsi->dev->ws_mutex);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* irdma_ws_remove - Free WS scheduler node, update WS tree
|
||
|
|
* @vsi: vsi pointer
|
||
|
|
* @user_pri: user priority
|
||
|
|
*/
|
||
|
|
void irdma_ws_remove(struct irdma_sc_vsi *vsi, u8 user_pri)
|
||
|
|
{
|
||
|
|
mutex_lock(&vsi->dev->ws_mutex);
|
||
|
|
if (irdma_tc_in_use(vsi, user_pri))
|
||
|
|
goto exit;
|
||
|
|
irdma_remove_leaf(vsi, user_pri);
|
||
|
|
exit:
|
||
|
|
mutex_unlock(&vsi->dev->ws_mutex);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* irdma_ws_reset - Reset entire WS tree
|
||
|
|
* @vsi: vsi pointer
|
||
|
|
*/
|
||
|
|
void irdma_ws_reset(struct irdma_sc_vsi *vsi)
|
||
|
|
{
|
||
|
|
u8 i;
|
||
|
|
|
||
|
|
mutex_lock(&vsi->dev->ws_mutex);
|
||
|
|
for (i = 0; i < IRDMA_MAX_USER_PRIORITY; ++i)
|
||
|
|
irdma_remove_leaf(vsi, i);
|
||
|
|
mutex_unlock(&vsi->dev->ws_mutex);
|
||
|
|
}
|