drm/nouveau/kms: Don't change EDID when it hasn't actually changed

[linux.git] / drivers / net / ethernet / intel / ice / ice_sched.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018, Intel Corporation. */

#include "ice_sched.h"

/**
 * ice_sched_add_root_node - Insert the Tx scheduler root node in SW DB
 * @pi: port information structure
 * @info: Scheduler element information from firmware
 *
 * This function inserts the root node of the scheduling tree topology
 * to the SW DB.
 */
static enum ice_status
ice_sched_add_root_node(struct ice_port_info *pi,
                        struct ice_aqc_txsched_elem_data *info)
{
        struct ice_sched_node *root;
        struct ice_hw *hw;

        if (!pi)
                return ICE_ERR_PARAM;

        hw = pi->hw;

        root = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*root), GFP_KERNEL);
        if (!root)
                return ICE_ERR_NO_MEMORY;

        /* coverity[suspicious_sizeof] */
        root->children = devm_kcalloc(ice_hw_to_dev(hw), hw->max_children[0],
                                      sizeof(*root), GFP_KERNEL);
        if (!root->children) {
                devm_kfree(ice_hw_to_dev(hw), root);
                return ICE_ERR_NO_MEMORY;
        }

        memcpy(&root->info, info, sizeof(*info));
        pi->root = root;
        return 0;
}

/**
 * ice_sched_find_node_by_teid - Find the Tx scheduler node in SW DB
 * @start_node: pointer to the starting ice_sched_node struct in a sub-tree
 * @teid: node TEID to search
 *
 * This function searches for a node matching the TEID in the scheduling tree
 * from the SW DB. The search is recursive and is restricted by the number of
 * layers it has searched through; stopping at the max supported layer.
 *
 * This function needs to be called when holding the port_info->sched_lock
 */
struct ice_sched_node *
ice_sched_find_node_by_teid(struct ice_sched_node *start_node, u32 teid)
{
        u16 i;

        /* The TEID is same as that of the start_node */
        if (ICE_TXSCHED_GET_NODE_TEID(start_node) == teid)
                return start_node;

        /* The node has no children or is at the max layer */
        if (!start_node->num_children ||
            start_node->tx_sched_layer >= ICE_AQC_TOPO_MAX_LEVEL_NUM ||
            start_node->info.data.elem_type == ICE_AQC_ELEM_TYPE_LEAF)
                return NULL;

        /* Check if TEID matches to any of the children nodes */
        for (i = 0; i < start_node->num_children; i++)
                if (ICE_TXSCHED_GET_NODE_TEID(start_node->children[i]) == teid)
                        return start_node->children[i];

        /* Search within each child's sub-tree */
        for (i = 0; i < start_node->num_children; i++) {
                struct ice_sched_node *tmp;

                tmp = ice_sched_find_node_by_teid(start_node->children[i],
                                                  teid);
                if (tmp)
                        return tmp;
        }

        return NULL;
}

/**
 * ice_aqc_send_sched_elem_cmd - send scheduling elements cmd
 * @hw: pointer to the HW struct
 * @cmd_opc: cmd opcode
 * @elems_req: number of elements to request
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @elems_resp: returns total number of elements response
 * @cd: pointer to command details structure or NULL
 *
 * This function sends a scheduling elements cmd (cmd_opc)
 */
static enum ice_status
ice_aqc_send_sched_elem_cmd(struct ice_hw *hw, enum ice_adminq_opc cmd_opc,
                            u16 elems_req, void *buf, u16 buf_size,
                            u16 *elems_resp, struct ice_sq_cd *cd)
{
        struct ice_aqc_sched_elem_cmd *cmd;
        struct ice_aq_desc desc;
        enum ice_status status;

        cmd = &desc.params.sched_elem_cmd;
        ice_fill_dflt_direct_cmd_desc(&desc, cmd_opc);
        cmd->num_elem_req = cpu_to_le16(elems_req);
        desc.flags |= cpu_to_le16(ICE_AQ_FLAG_RD);
        status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
        if (!status && elems_resp)
                *elems_resp = le16_to_cpu(cmd->num_elem_resp);

        return status;
}

/**
 * ice_aq_query_sched_elems - query scheduler elements
 * @hw: pointer to the HW struct
 * @elems_req: number of elements to query
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @elems_ret: returns total number of elements returned
 * @cd: pointer to command details structure or NULL
 *
 * Query scheduling elements (0x0404)
 */
enum ice_status
ice_aq_query_sched_elems(struct ice_hw *hw, u16 elems_req,
                         struct ice_aqc_txsched_elem_data *buf, u16 buf_size,
                         u16 *elems_ret, struct ice_sq_cd *cd)
{
        return ice_aqc_send_sched_elem_cmd(hw, ice_aqc_opc_get_sched_elems,
                                           elems_req, (void *)buf, buf_size,
                                           elems_ret, cd);
}

/**
 * ice_sched_add_node - Insert the Tx scheduler node in SW DB
 * @pi: port information structure
 * @layer: Scheduler layer of the node
 * @info: Scheduler element information from firmware
 *
 * This function inserts a scheduler node to the SW DB.
 */
enum ice_status
ice_sched_add_node(struct ice_port_info *pi, u8 layer,
                   struct ice_aqc_txsched_elem_data *info)
{
        struct ice_aqc_txsched_elem_data elem;
        struct ice_sched_node *parent;
        struct ice_sched_node *node;
        enum ice_status status;
        struct ice_hw *hw;

        if (!pi)
                return ICE_ERR_PARAM;

        hw = pi->hw;

        /* A valid parent node should be there */
        parent = ice_sched_find_node_by_teid(pi->root,
                                             le32_to_cpu(info->parent_teid));
        if (!parent) {
                ice_debug(hw, ICE_DBG_SCHED,
                          "Parent Node not found for parent_teid=0x%x\n",
                          le32_to_cpu(info->parent_teid));
                return ICE_ERR_PARAM;
        }

        /* query the current node information from FW before adding it
         * to the SW DB
         */
        status = ice_sched_query_elem(hw, le32_to_cpu(info->node_teid), &elem);
        if (status)
                return status;

        node = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*node), GFP_KERNEL);
        if (!node)
                return ICE_ERR_NO_MEMORY;
        if (hw->max_children[layer]) {
                /* coverity[suspicious_sizeof] */
                node->children = devm_kcalloc(ice_hw_to_dev(hw),
                                              hw->max_children[layer],
                                              sizeof(*node), GFP_KERNEL);
                if (!node->children) {
                        devm_kfree(ice_hw_to_dev(hw), node);
                        return ICE_ERR_NO_MEMORY;
                }
        }

        node->in_use = true;
        node->parent = parent;
        node->tx_sched_layer = layer;
        parent->children[parent->num_children++] = node;
        node->info = elem;
        return 0;
}

/**
 * ice_aq_delete_sched_elems - delete scheduler elements
 * @hw: pointer to the HW struct
 * @grps_req: number of groups to delete
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @grps_del: returns total number of elements deleted
 * @cd: pointer to command details structure or NULL
 *
 * Delete scheduling elements (0x040F)
 */
static enum ice_status
ice_aq_delete_sched_elems(struct ice_hw *hw, u16 grps_req,
                          struct ice_aqc_delete_elem *buf, u16 buf_size,
                          u16 *grps_del, struct ice_sq_cd *cd)
{
        return ice_aqc_send_sched_elem_cmd(hw, ice_aqc_opc_delete_sched_elems,
                                           grps_req, (void *)buf, buf_size,
                                           grps_del, cd);
}

/**
 * ice_sched_remove_elems - remove nodes from HW
 * @hw: pointer to the HW struct
 * @parent: pointer to the parent node
 * @num_nodes: number of nodes
 * @node_teids: array of node teids to be deleted
 *
 * This function remove nodes from HW
 */
static enum ice_status
ice_sched_remove_elems(struct ice_hw *hw, struct ice_sched_node *parent,
                       u16 num_nodes, u32 *node_teids)
{
        struct ice_aqc_delete_elem *buf;
        u16 i, num_groups_removed = 0;
        enum ice_status status;
        u16 buf_size;

        buf_size = struct_size(buf, teid, num_nodes);
        buf = devm_kzalloc(ice_hw_to_dev(hw), buf_size, GFP_KERNEL);
        if (!buf)
                return ICE_ERR_NO_MEMORY;

        buf->hdr.parent_teid = parent->info.node_teid;
        buf->hdr.num_elems = cpu_to_le16(num_nodes);
        for (i = 0; i < num_nodes; i++)
                buf->teid[i] = cpu_to_le32(node_teids[i]);

        status = ice_aq_delete_sched_elems(hw, 1, buf, buf_size,
                                           &num_groups_removed, NULL);
        if (status || num_groups_removed != 1)
                ice_debug(hw, ICE_DBG_SCHED, "remove node failed FW error %d\n",
                          hw->adminq.sq_last_status);

        devm_kfree(ice_hw_to_dev(hw), buf);
        return status;
}

/**
 * ice_sched_get_first_node - get the first node of the given layer
 * @pi: port information structure
 * @parent: pointer the base node of the subtree
 * @layer: layer number
 *
 * This function retrieves the first node of the given layer from the subtree
 */
static struct ice_sched_node *
ice_sched_get_first_node(struct ice_port_info *pi,
                         struct ice_sched_node *parent, u8 layer)
{
        return pi->sib_head[parent->tc_num][layer];
}

/**
 * ice_sched_get_tc_node - get pointer to TC node
 * @pi: port information structure
 * @tc: TC number
 *
 * This function returns the TC node pointer
 */
struct ice_sched_node *ice_sched_get_tc_node(struct ice_port_info *pi, u8 tc)
{
        u8 i;

        if (!pi || !pi->root)
                return NULL;
        for (i = 0; i < pi->root->num_children; i++)
                if (pi->root->children[i]->tc_num == tc)
                        return pi->root->children[i];
        return NULL;
}

/**
 * ice_free_sched_node - Free a Tx scheduler node from SW DB
 * @pi: port information structure
 * @node: pointer to the ice_sched_node struct
 *
 * This function frees up a node from SW DB as well as from HW
 *
 * This function needs to be called with the port_info->sched_lock held
 */
void ice_free_sched_node(struct ice_port_info *pi, struct ice_sched_node *node)
{
        struct ice_sched_node *parent;
        struct ice_hw *hw = pi->hw;
        u8 i, j;

        /* Free the children before freeing up the parent node
         * The parent array is updated below and that shifts the nodes
         * in the array. So always pick the first child if num children > 0
         */
        while (node->num_children)
                ice_free_sched_node(pi, node->children[0]);

        /* Leaf, TC and root nodes can't be deleted by SW */
        if (node->tx_sched_layer >= hw->sw_entry_point_layer &&
            node->info.data.elem_type != ICE_AQC_ELEM_TYPE_TC &&
            node->info.data.elem_type != ICE_AQC_ELEM_TYPE_ROOT_PORT &&
            node->info.data.elem_type != ICE_AQC_ELEM_TYPE_LEAF) {
                u32 teid = le32_to_cpu(node->info.node_teid);

                ice_sched_remove_elems(hw, node->parent, 1, &teid);
        }
        parent = node->parent;
        /* root has no parent */
        if (parent) {
                struct ice_sched_node *p;

                /* update the parent */
                for (i = 0; i < parent->num_children; i++)
                        if (parent->children[i] == node) {
                                for (j = i + 1; j < parent->num_children; j++)
                                        parent->children[j - 1] =
                                                parent->children[j];
                                parent->num_children--;
                                break;
                        }

                p = ice_sched_get_first_node(pi, node, node->tx_sched_layer);
                while (p) {
                        if (p->sibling == node) {
                                p->sibling = node->sibling;
                                break;
                        }
                        p = p->sibling;
                }

                /* update the sibling head if head is getting removed */
                if (pi->sib_head[node->tc_num][node->tx_sched_layer] == node)
                        pi->sib_head[node->tc_num][node->tx_sched_layer] =
                                node->sibling;
        }

        /* leaf nodes have no children */
        if (node->children)
                devm_kfree(ice_hw_to_dev(hw), node->children);
        devm_kfree(ice_hw_to_dev(hw), node);
}

/**
 * ice_aq_get_dflt_topo - gets default scheduler topology
 * @hw: pointer to the HW struct
 * @lport: logical port number
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @num_branches: returns total number of queue to port branches
 * @cd: pointer to command details structure or NULL
 *
 * Get default scheduler topology (0x400)
 */
static enum ice_status
ice_aq_get_dflt_topo(struct ice_hw *hw, u8 lport,
                     struct ice_aqc_get_topo_elem *buf, u16 buf_size,
                     u8 *num_branches, struct ice_sq_cd *cd)
{
        struct ice_aqc_get_topo *cmd;
        struct ice_aq_desc desc;
        enum ice_status status;

        cmd = &desc.params.get_topo;
        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_get_dflt_topo);
        cmd->port_num = lport;
        status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
        if (!status && num_branches)
                *num_branches = cmd->num_branches;

        return status;
}

/**
 * ice_aq_add_sched_elems - adds scheduling element
 * @hw: pointer to the HW struct
 * @grps_req: the number of groups that are requested to be added
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @grps_added: returns total number of groups added
 * @cd: pointer to command details structure or NULL
 *
 * Add scheduling elements (0x0401)
 */
static enum ice_status
ice_aq_add_sched_elems(struct ice_hw *hw, u16 grps_req,
                       struct ice_aqc_add_elem *buf, u16 buf_size,
                       u16 *grps_added, struct ice_sq_cd *cd)
{
        return ice_aqc_send_sched_elem_cmd(hw, ice_aqc_opc_add_sched_elems,
                                           grps_req, (void *)buf, buf_size,
                                           grps_added, cd);
}

/**
 * ice_aq_cfg_sched_elems - configures scheduler elements
 * @hw: pointer to the HW struct
 * @elems_req: number of elements to configure
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @elems_cfgd: returns total number of elements configured
 * @cd: pointer to command details structure or NULL
 *
 * Configure scheduling elements (0x0403)
 */
static enum ice_status
ice_aq_cfg_sched_elems(struct ice_hw *hw, u16 elems_req,
                       struct ice_aqc_txsched_elem_data *buf, u16 buf_size,
                       u16 *elems_cfgd, struct ice_sq_cd *cd)
{
        return ice_aqc_send_sched_elem_cmd(hw, ice_aqc_opc_cfg_sched_elems,
                                           elems_req, (void *)buf, buf_size,
                                           elems_cfgd, cd);
}

/**
 * ice_aq_suspend_sched_elems - suspend scheduler elements
 * @hw: pointer to the HW struct
 * @elems_req: number of elements to suspend
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @elems_ret: returns total number of elements suspended
 * @cd: pointer to command details structure or NULL
 *
 * Suspend scheduling elements (0x0409)
 */
static enum ice_status
ice_aq_suspend_sched_elems(struct ice_hw *hw, u16 elems_req, __le32 *buf,
                           u16 buf_size, u16 *elems_ret, struct ice_sq_cd *cd)
{
        return ice_aqc_send_sched_elem_cmd(hw, ice_aqc_opc_suspend_sched_elems,
                                           elems_req, (void *)buf, buf_size,
                                           elems_ret, cd);
}

/**
 * ice_aq_resume_sched_elems - resume scheduler elements
 * @hw: pointer to the HW struct
 * @elems_req: number of elements to resume
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @elems_ret: returns total number of elements resumed
 * @cd: pointer to command details structure or NULL
 *
 * resume scheduling elements (0x040A)
 */
static enum ice_status
ice_aq_resume_sched_elems(struct ice_hw *hw, u16 elems_req, __le32 *buf,
                          u16 buf_size, u16 *elems_ret, struct ice_sq_cd *cd)
{
        return ice_aqc_send_sched_elem_cmd(hw, ice_aqc_opc_resume_sched_elems,
                                           elems_req, (void *)buf, buf_size,
                                           elems_ret, cd);
}

/**
 * ice_aq_query_sched_res - query scheduler resource
 * @hw: pointer to the HW struct
 * @buf_size: buffer size in bytes
 * @buf: pointer to buffer
 * @cd: pointer to command details structure or NULL
 *
 * Query scheduler resource allocation (0x0412)
 */
static enum ice_status
ice_aq_query_sched_res(struct ice_hw *hw, u16 buf_size,
                       struct ice_aqc_query_txsched_res_resp *buf,
                       struct ice_sq_cd *cd)
{
        struct ice_aq_desc desc;

        ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_query_sched_res);
        return ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
}

/**
 * ice_sched_suspend_resume_elems - suspend or resume HW nodes
 * @hw: pointer to the HW struct
 * @num_nodes: number of nodes
 * @node_teids: array of node teids to be suspended or resumed
 * @suspend: true means suspend / false means resume
 *
 * This function suspends or resumes HW nodes
 */
static enum ice_status
ice_sched_suspend_resume_elems(struct ice_hw *hw, u8 num_nodes, u32 *node_teids,
                               bool suspend)
{
        u16 i, buf_size, num_elem_ret = 0;
        enum ice_status status;
        __le32 *buf;

        buf_size = sizeof(*buf) * num_nodes;
        buf = devm_kzalloc(ice_hw_to_dev(hw), buf_size, GFP_KERNEL);
        if (!buf)
                return ICE_ERR_NO_MEMORY;

        for (i = 0; i < num_nodes; i++)
                buf[i] = cpu_to_le32(node_teids[i]);

        if (suspend)
                status = ice_aq_suspend_sched_elems(hw, num_nodes, buf,
                                                    buf_size, &num_elem_ret,
                                                    NULL);
        else
                status = ice_aq_resume_sched_elems(hw, num_nodes, buf,
                                                   buf_size, &num_elem_ret,
                                                   NULL);
        if (status || num_elem_ret != num_nodes)
                ice_debug(hw, ICE_DBG_SCHED, "suspend/resume failed\n");

        devm_kfree(ice_hw_to_dev(hw), buf);
        return status;
}

/**
 * ice_alloc_lan_q_ctx - allocate LAN queue contexts for the given VSI and TC
 * @hw: pointer to the HW struct
 * @vsi_handle: VSI handle
 * @tc: TC number
 * @new_numqs: number of queues
 */
static enum ice_status
ice_alloc_lan_q_ctx(struct ice_hw *hw, u16 vsi_handle, u8 tc, u16 new_numqs)
{
        struct ice_vsi_ctx *vsi_ctx;
        struct ice_q_ctx *q_ctx;

        vsi_ctx = ice_get_vsi_ctx(hw, vsi_handle);
        if (!vsi_ctx)
                return ICE_ERR_PARAM;
        /* allocate LAN queue contexts */
        if (!vsi_ctx->lan_q_ctx[tc]) {
                vsi_ctx->lan_q_ctx[tc] = devm_kcalloc(ice_hw_to_dev(hw),
                                                      new_numqs,
                                                      sizeof(*q_ctx),
                                                      GFP_KERNEL);
                if (!vsi_ctx->lan_q_ctx[tc])
                        return ICE_ERR_NO_MEMORY;
                vsi_ctx->num_lan_q_entries[tc] = new_numqs;
                return 0;
        }
        /* num queues are increased, update the queue contexts */
        if (new_numqs > vsi_ctx->num_lan_q_entries[tc]) {
                u16 prev_num = vsi_ctx->num_lan_q_entries[tc];

                q_ctx = devm_kcalloc(ice_hw_to_dev(hw), new_numqs,
                                     sizeof(*q_ctx), GFP_KERNEL);
                if (!q_ctx)
                        return ICE_ERR_NO_MEMORY;
                memcpy(q_ctx, vsi_ctx->lan_q_ctx[tc],
                       prev_num * sizeof(*q_ctx));
                devm_kfree(ice_hw_to_dev(hw), vsi_ctx->lan_q_ctx[tc]);
                vsi_ctx->lan_q_ctx[tc] = q_ctx;
                vsi_ctx->num_lan_q_entries[tc] = new_numqs;
        }
        return 0;
}

/**
 * ice_aq_rl_profile - performs a rate limiting task
 * @hw: pointer to the HW struct
 * @opcode: opcode for add, query, or remove profile(s)
 * @num_profiles: the number of profiles
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @num_processed: number of processed add or remove profile(s) to return
 * @cd: pointer to command details structure
 *
 * RL profile function to add, query, or remove profile(s)
 */
static enum ice_status
ice_aq_rl_profile(struct ice_hw *hw, enum ice_adminq_opc opcode,
                  u16 num_profiles, struct ice_aqc_rl_profile_elem *buf,
                  u16 buf_size, u16 *num_processed, struct ice_sq_cd *cd)
{
        struct ice_aqc_rl_profile *cmd;
        struct ice_aq_desc desc;
        enum ice_status status;

        cmd = &desc.params.rl_profile;

        ice_fill_dflt_direct_cmd_desc(&desc, opcode);
        desc.flags |= cpu_to_le16(ICE_AQ_FLAG_RD);
        cmd->num_profiles = cpu_to_le16(num_profiles);
        status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
        if (!status && num_processed)
                *num_processed = le16_to_cpu(cmd->num_processed);
        return status;
}

/**
 * ice_aq_add_rl_profile - adds rate limiting profile(s)
 * @hw: pointer to the HW struct
 * @num_profiles: the number of profile(s) to be add
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @num_profiles_added: total number of profiles added to return
 * @cd: pointer to command details structure
 *
 * Add RL profile (0x0410)
 */
static enum ice_status
ice_aq_add_rl_profile(struct ice_hw *hw, u16 num_profiles,
                      struct ice_aqc_rl_profile_elem *buf, u16 buf_size,
                      u16 *num_profiles_added, struct ice_sq_cd *cd)
{
        return ice_aq_rl_profile(hw, ice_aqc_opc_add_rl_profiles, num_profiles,
                                 buf, buf_size, num_profiles_added, cd);
}

/**
 * ice_aq_remove_rl_profile - removes RL profile(s)
 * @hw: pointer to the HW struct
 * @num_profiles: the number of profile(s) to remove
 * @buf: pointer to buffer
 * @buf_size: buffer size in bytes
 * @num_profiles_removed: total number of profiles removed to return
 * @cd: pointer to command details structure or NULL
 *
 * Remove RL profile (0x0415)
 */
static enum ice_status
ice_aq_remove_rl_profile(struct ice_hw *hw, u16 num_profiles,
                         struct ice_aqc_rl_profile_elem *buf, u16 buf_size,
                         u16 *num_profiles_removed, struct ice_sq_cd *cd)
{
        return ice_aq_rl_profile(hw, ice_aqc_opc_remove_rl_profiles,
                                 num_profiles, buf, buf_size,
                                 num_profiles_removed, cd);
}

/**
 * ice_sched_del_rl_profile - remove RL profile
 * @hw: pointer to the HW struct
 * @rl_info: rate limit profile information
 *
 * If the profile ID is not referenced anymore, it removes profile ID with
 * its associated parameters from HW DB,and locally. The caller needs to
 * hold scheduler lock.
 */
static enum ice_status
ice_sched_del_rl_profile(struct ice_hw *hw,
                         struct ice_aqc_rl_profile_info *rl_info)
{
        struct ice_aqc_rl_profile_elem *buf;
        u16 num_profiles_removed;
        enum ice_status status;
        u16 num_profiles = 1;

        if (rl_info->prof_id_ref != 0)
                return ICE_ERR_IN_USE;

        /* Safe to remove profile ID */
        buf = &rl_info->profile;
        status = ice_aq_remove_rl_profile(hw, num_profiles, buf, sizeof(*buf),
                                          &num_profiles_removed, NULL);
        if (status || num_profiles_removed != num_profiles)
                return ICE_ERR_CFG;

        /* Delete stale entry now */
        list_del(&rl_info->list_entry);
        devm_kfree(ice_hw_to_dev(hw), rl_info);
        return status;
}

/**
 * ice_sched_clear_rl_prof - clears RL prof entries
 * @pi: port information structure
 *
 * This function removes all RL profile from HW as well as from SW DB.
 */
static void ice_sched_clear_rl_prof(struct ice_port_info *pi)
{
        u16 ln;

        for (ln = 0; ln < pi->hw->num_tx_sched_layers; ln++) {
                struct ice_aqc_rl_profile_info *rl_prof_elem;
                struct ice_aqc_rl_profile_info *rl_prof_tmp;

                list_for_each_entry_safe(rl_prof_elem, rl_prof_tmp,
                                         &pi->rl_prof_list[ln], list_entry) {
                        struct ice_hw *hw = pi->hw;
                        enum ice_status status;

                        rl_prof_elem->prof_id_ref = 0;
                        status = ice_sched_del_rl_profile(hw, rl_prof_elem);
                        if (status) {
                                ice_debug(hw, ICE_DBG_SCHED,
                                          "Remove rl profile failed\n");
                                /* On error, free mem required */
                                list_del(&rl_prof_elem->list_entry);
                                devm_kfree(ice_hw_to_dev(hw), rl_prof_elem);
                        }
                }
        }
}

/**
 * ice_sched_clear_agg - clears the aggregator related information
 * @hw: pointer to the hardware structure
 *
 * This function removes aggregator list and free up aggregator related memory
 * previously allocated.
 */
void ice_sched_clear_agg(struct ice_hw *hw)
{
        struct ice_sched_agg_info *agg_info;
        struct ice_sched_agg_info *atmp;

        list_for_each_entry_safe(agg_info, atmp, &hw->agg_list, list_entry) {
                struct ice_sched_agg_vsi_info *agg_vsi_info;
                struct ice_sched_agg_vsi_info *vtmp;

                list_for_each_entry_safe(agg_vsi_info, vtmp,
                                         &agg_info->agg_vsi_list, list_entry) {
                        list_del(&agg_vsi_info->list_entry);
                        devm_kfree(ice_hw_to_dev(hw), agg_vsi_info);
                }
                list_del(&agg_info->list_entry);
                devm_kfree(ice_hw_to_dev(hw), agg_info);
        }
}

/**
 * ice_sched_clear_tx_topo - clears the scheduler tree nodes
 * @pi: port information structure
 *
 * This function removes all the nodes from HW as well as from SW DB.
 */
static void ice_sched_clear_tx_topo(struct ice_port_info *pi)
{
        if (!pi)
                return;
        /* remove RL profiles related lists */
        ice_sched_clear_rl_prof(pi);
        if (pi->root) {
                ice_free_sched_node(pi, pi->root);
                pi->root = NULL;
        }
}

/**
 * ice_sched_clear_port - clear the scheduler elements from SW DB for a port
 * @pi: port information structure
 *
 * Cleanup scheduling elements from SW DB
 */
void ice_sched_clear_port(struct ice_port_info *pi)
{
        if (!pi || pi->port_state != ICE_SCHED_PORT_STATE_READY)
                return;

        pi->port_state = ICE_SCHED_PORT_STATE_INIT;
        mutex_lock(&pi->sched_lock);
        ice_sched_clear_tx_topo(pi);
        mutex_unlock(&pi->sched_lock);
        mutex_destroy(&pi->sched_lock);
}

/**
 * ice_sched_cleanup_all - cleanup scheduler elements from SW DB for all ports
 * @hw: pointer to the HW struct
 *
 * Cleanup scheduling elements from SW DB for all the ports
 */
void ice_sched_cleanup_all(struct ice_hw *hw)
{
        if (!hw)
                return;

        if (hw->layer_info) {
                devm_kfree(ice_hw_to_dev(hw), hw->layer_info);
                hw->layer_info = NULL;
        }

        ice_sched_clear_port(hw->port_info);

        hw->num_tx_sched_layers = 0;
        hw->num_tx_sched_phys_layers = 0;
        hw->flattened_layers = 0;
        hw->max_cgds = 0;
}

/**
 * ice_sched_add_elems - add nodes to HW and SW DB
 * @pi: port information structure
 * @tc_node: pointer to the branch node
 * @parent: pointer to the parent node
 * @layer: layer number to add nodes
 * @num_nodes: number of nodes
 * @num_nodes_added: pointer to num nodes added
 * @first_node_teid: if new nodes are added then return the TEID of first node
 *
 * This function add nodes to HW as well as to SW DB for a given layer
 */
static enum ice_status
ice_sched_add_elems(struct ice_port_info *pi, struct ice_sched_node *tc_node,
                    struct ice_sched_node *parent, u8 layer, u16 num_nodes,
                    u16 *num_nodes_added, u32 *first_node_teid)
{
        struct ice_sched_node *prev, *new_node;
        struct ice_aqc_add_elem *buf;
        u16 i, num_groups_added = 0;
        enum ice_status status = 0;
        struct ice_hw *hw = pi->hw;
        size_t buf_size;
        u32 teid;

        buf_size = struct_size(buf, generic, num_nodes);
        buf = devm_kzalloc(ice_hw_to_dev(hw), buf_size, GFP_KERNEL);
        if (!buf)
                return ICE_ERR_NO_MEMORY;

        buf->hdr.parent_teid = parent->info.node_teid;
        buf->hdr.num_elems = cpu_to_le16(num_nodes);
        for (i = 0; i < num_nodes; i++) {
                buf->generic[i].parent_teid = parent->info.node_teid;
                buf->generic[i].data.elem_type = ICE_AQC_ELEM_TYPE_SE_GENERIC;
                buf->generic[i].data.valid_sections =
                        ICE_AQC_ELEM_VALID_GENERIC | ICE_AQC_ELEM_VALID_CIR |
                        ICE_AQC_ELEM_VALID_EIR;
                buf->generic[i].data.generic = 0;
                buf->generic[i].data.cir_bw.bw_profile_idx =
                        cpu_to_le16(ICE_SCHED_DFLT_RL_PROF_ID);
                buf->generic[i].data.cir_bw.bw_alloc =
                        cpu_to_le16(ICE_SCHED_DFLT_BW_WT);
                buf->generic[i].data.eir_bw.bw_profile_idx =
                        cpu_to_le16(ICE_SCHED_DFLT_RL_PROF_ID);
                buf->generic[i].data.eir_bw.bw_alloc =
                        cpu_to_le16(ICE_SCHED_DFLT_BW_WT);
        }

        status = ice_aq_add_sched_elems(hw, 1, buf, buf_size,
                                        &num_groups_added, NULL);
        if (status || num_groups_added != 1) {
                ice_debug(hw, ICE_DBG_SCHED, "add node failed FW Error %d\n",
                          hw->adminq.sq_last_status);
                devm_kfree(ice_hw_to_dev(hw), buf);
                return ICE_ERR_CFG;
        }

        *num_nodes_added = num_nodes;
        /* add nodes to the SW DB */
        for (i = 0; i < num_nodes; i++) {
                status = ice_sched_add_node(pi, layer, &buf->generic[i]);
                if (status) {
                        ice_debug(hw, ICE_DBG_SCHED,
                                  "add nodes in SW DB failed status =%d\n",
                                  status);
                        break;
                }

                teid = le32_to_cpu(buf->generic[i].node_teid);
                new_node = ice_sched_find_node_by_teid(parent, teid);
                if (!new_node) {
                        ice_debug(hw, ICE_DBG_SCHED,
                                  "Node is missing for teid =%d\n", teid);
                        break;
                }

                new_node->sibling = NULL;
                new_node->tc_num = tc_node->tc_num;

                /* add it to previous node sibling pointer */
                /* Note: siblings are not linked across branches */
                prev = ice_sched_get_first_node(pi, tc_node, layer);
                if (prev && prev != new_node) {
                        while (prev->sibling)
                                prev = prev->sibling;
                        prev->sibling = new_node;
                }

                /* initialize the sibling head */
                if (!pi->sib_head[tc_node->tc_num][layer])
                        pi->sib_head[tc_node->tc_num][layer] = new_node;

                if (i == 0)
                        *first_node_teid = teid;
        }

        devm_kfree(ice_hw_to_dev(hw), buf);
        return status;
}

/**
 * ice_sched_add_nodes_to_layer - Add nodes to a given layer
 * @pi: port information structure
 * @tc_node: pointer to TC node
 * @parent: pointer to parent node
 * @layer: layer number to add nodes
 * @num_nodes: number of nodes to be added
 * @first_node_teid: pointer to the first node TEID
 * @num_nodes_added: pointer to number of nodes added
 *
 * This function add nodes to a given layer.
 */
static enum ice_status
ice_sched_add_nodes_to_layer(struct ice_port_info *pi,
                             struct ice_sched_node *tc_node,
                             struct ice_sched_node *parent, u8 layer,
                             u16 num_nodes, u32 *first_node_teid,
                             u16 *num_nodes_added)
{
        u32 *first_teid_ptr = first_node_teid;
        u16 new_num_nodes, max_child_nodes;
        enum ice_status status = 0;
        struct ice_hw *hw = pi->hw;
        u16 num_added = 0;
        u32 temp;

        *num_nodes_added = 0;

        if (!num_nodes)
                return status;

        if (!parent || layer < hw->sw_entry_point_layer)
                return ICE_ERR_PARAM;

        /* max children per node per layer */
        max_child_nodes = hw->max_children[parent->tx_sched_layer];

        /* current number of children + required nodes exceed max children ? */
        if ((parent->num_children + num_nodes) > max_child_nodes) {
                /* Fail if the parent is a TC node */
                if (parent == tc_node)
                        return ICE_ERR_CFG;

                /* utilize all the spaces if the parent is not full */
                if (parent->num_children < max_child_nodes) {
                        new_num_nodes = max_child_nodes - parent->num_children;
                        /* this recursion is intentional, and wouldn't
                         * go more than 2 calls
                         */
                        status = ice_sched_add_nodes_to_layer(pi, tc_node,
                                                              parent, layer,
                                                              new_num_nodes,
                                                              first_node_teid,
                                                              &num_added);
                        if (status)
                                return status;

                        *num_nodes_added += num_added;
                }
                /* Don't modify the first node TEID memory if the first node was
                 * added already in the above call. Instead send some temp
                 * memory for all other recursive calls.
                 */
                if (num_added)
                        first_teid_ptr = &temp;

                new_num_nodes = num_nodes - num_added;

                /* This parent is full, try the next sibling */
                parent = parent->sibling;

                /* this recursion is intentional, for 1024 queues
                 * per VSI, it goes max of 16 iterations.
                 * 1024 / 8 = 128 layer 8 nodes
                 * 128 /8 = 16 (add 8 nodes per iteration)
                 */
                status = ice_sched_add_nodes_to_layer(pi, tc_node, parent,
                                                      layer, new_num_nodes,
                                                      first_teid_ptr,
                                                      &num_added);
                *num_nodes_added += num_added;
                return status;
        }

        status = ice_sched_add_elems(pi, tc_node, parent, layer, num_nodes,
                                     num_nodes_added, first_node_teid);
        return status;
}

/**
 * ice_sched_get_qgrp_layer - get the current queue group layer number
 * @hw: pointer to the HW struct
 *
 * This function returns the current queue group layer number
 */
static u8 ice_sched_get_qgrp_layer(struct ice_hw *hw)
{
        /* It's always total layers - 1, the array is 0 relative so -2 */
        return hw->num_tx_sched_layers - ICE_QGRP_LAYER_OFFSET;
}

/**
 * ice_sched_get_vsi_layer - get the current VSI layer number
 * @hw: pointer to the HW struct
 *
 * This function returns the current VSI layer number
 */
static u8 ice_sched_get_vsi_layer(struct ice_hw *hw)
{
        /* Num Layers       VSI layer
         *     9               6
         *     7               4
         *     5 or less       sw_entry_point_layer
         */
        /* calculate the VSI layer based on number of layers. */
        if (hw->num_tx_sched_layers > ICE_VSI_LAYER_OFFSET + 1) {
                u8 layer = hw->num_tx_sched_layers - ICE_VSI_LAYER_OFFSET;

                if (layer > hw->sw_entry_point_layer)
                        return layer;
        }
        return hw->sw_entry_point_layer;
}

/**
 * ice_rm_dflt_leaf_node - remove the default leaf node in the tree
 * @pi: port information structure
 *
 * This function removes the leaf node that was created by the FW
 * during initialization
 */
static void ice_rm_dflt_leaf_node(struct ice_port_info *pi)
{
        struct ice_sched_node *node;

        node = pi->root;
        while (node) {
                if (!node->num_children)
                        break;
                node = node->children[0];
        }
        if (node && node->info.data.elem_type == ICE_AQC_ELEM_TYPE_LEAF) {
                u32 teid = le32_to_cpu(node->info.node_teid);
                enum ice_status status;

                /* remove the default leaf node */
                status = ice_sched_remove_elems(pi->hw, node->parent, 1, &teid);
                if (!status)
                        ice_free_sched_node(pi, node);
        }
}

/**
 * ice_sched_rm_dflt_nodes - free the default nodes in the tree
 * @pi: port information structure
 *
 * This function frees all the nodes except root and TC that were created by
 * the FW during initialization
 */
static void ice_sched_rm_dflt_nodes(struct ice_port_info *pi)
{
        struct ice_sched_node *node;

        ice_rm_dflt_leaf_node(pi);

        /* remove the default nodes except TC and root nodes */
        node = pi->root;
        while (node) {
                if (node->tx_sched_layer >= pi->hw->sw_entry_point_layer &&
                    node->info.data.elem_type != ICE_AQC_ELEM_TYPE_TC &&
                    node->info.data.elem_type != ICE_AQC_ELEM_TYPE_ROOT_PORT) {
                        ice_free_sched_node(pi, node);
                        break;
                }

                if (!node->num_children)
                        break;
                node = node->children[0];
        }
}

/**
 * ice_sched_init_port - Initialize scheduler by querying information from FW
 * @pi: port info structure for the tree to cleanup
 *
 * This function is the initial call to find the total number of Tx scheduler
 * resources, default topology created by firmware and storing the information
 * in SW DB.
 */
enum ice_status ice_sched_init_port(struct ice_port_info *pi)
{
        struct ice_aqc_get_topo_elem *buf;
        enum ice_status status;
        struct ice_hw *hw;
        u8 num_branches;
        u16 num_elems;
        u8 i, j;

        if (!pi)
                return ICE_ERR_PARAM;
        hw = pi->hw;

        /* Query the Default Topology from FW */
        buf = devm_kzalloc(ice_hw_to_dev(hw), ICE_AQ_MAX_BUF_LEN, GFP_KERNEL);
        if (!buf)
                return ICE_ERR_NO_MEMORY;

        /* Query default scheduling tree topology */
        status = ice_aq_get_dflt_topo(hw, pi->lport, buf, ICE_AQ_MAX_BUF_LEN,
                                      &num_branches, NULL);
        if (status)
                goto err_init_port;

        /* num_branches should be between 1-8 */
        if (num_branches < 1 || num_branches > ICE_TXSCHED_MAX_BRANCHES) {
                ice_debug(hw, ICE_DBG_SCHED, "num_branches unexpected %d\n",
                          num_branches);
                status = ICE_ERR_PARAM;
                goto err_init_port;
        }

        /* get the number of elements on the default/first branch */
        num_elems = le16_to_cpu(buf[0].hdr.num_elems);

        /* num_elems should always be between 1-9 */
        if (num_elems < 1 || num_elems > ICE_AQC_TOPO_MAX_LEVEL_NUM) {
                ice_debug(hw, ICE_DBG_SCHED, "num_elems unexpected %d\n",
                          num_elems);
                status = ICE_ERR_PARAM;
                goto err_init_port;
        }

        /* If the last node is a leaf node then the index of the queue group
         * layer is two less than the number of elements.
         */
        if (num_elems > 2 && buf[0].generic[num_elems - 1].data.elem_type ==
            ICE_AQC_ELEM_TYPE_LEAF)
                pi->last_node_teid =
                        le32_to_cpu(buf[0].generic[num_elems - 2].node_teid);
        else
                pi->last_node_teid =
                        le32_to_cpu(buf[0].generic[num_elems - 1].node_teid);

        /* Insert the Tx Sched root node */
        status = ice_sched_add_root_node(pi, &buf[0].generic[0]);
        if (status)
                goto err_init_port;

        /* Parse the default tree and cache the information */
        for (i = 0; i < num_branches; i++) {
                num_elems = le16_to_cpu(buf[i].hdr.num_elems);

                /* Skip root element as already inserted */
                for (j = 1; j < num_elems; j++) {
                        /* update the sw entry point */
                        if (buf[0].generic[j].data.elem_type ==
                            ICE_AQC_ELEM_TYPE_ENTRY_POINT)
                                hw->sw_entry_point_layer = j;

                        status = ice_sched_add_node(pi, j, &buf[i].generic[j]);
                        if (status)
                                goto err_init_port;
                }
        }

        /* Remove the default nodes. */
        if (pi->root)
                ice_sched_rm_dflt_nodes(pi);

        /* initialize the port for handling the scheduler tree */
        pi->port_state = ICE_SCHED_PORT_STATE_READY;
        mutex_init(&pi->sched_lock);
        for (i = 0; i < ICE_AQC_TOPO_MAX_LEVEL_NUM; i++)
                INIT_LIST_HEAD(&pi->rl_prof_list[i]);

err_init_port:
        if (status && pi->root) {
                ice_free_sched_node(pi, pi->root);
                pi->root = NULL;
        }

        devm_kfree(ice_hw_to_dev(hw), buf);
        return status;
}

/**
 * ice_sched_query_res_alloc - query the FW for num of logical sched layers
 * @hw: pointer to the HW struct
 *
 * query FW for allocated scheduler resources and store in HW struct
 */
enum ice_status ice_sched_query_res_alloc(struct ice_hw *hw)
{
        struct ice_aqc_query_txsched_res_resp *buf;
        enum ice_status status = 0;
        __le16 max_sibl;
        u16 i;

        if (hw->layer_info)
                return status;

        buf = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*buf), GFP_KERNEL);
        if (!buf)
                return ICE_ERR_NO_MEMORY;

        status = ice_aq_query_sched_res(hw, sizeof(*buf), buf, NULL);
        if (status)
                goto sched_query_out;

        hw->num_tx_sched_layers = le16_to_cpu(buf->sched_props.logical_levels);
        hw->num_tx_sched_phys_layers =
                le16_to_cpu(buf->sched_props.phys_levels);
        hw->flattened_layers = buf->sched_props.flattening_bitmap;
        hw->max_cgds = buf->sched_props.max_pf_cgds;

        /* max sibling group size of current layer refers to the max children
         * of the below layer node.
         * layer 1 node max children will be layer 2 max sibling group size
         * layer 2 node max children will be layer 3 max sibling group size
         * and so on. This array will be populated from root (index 0) to
         * qgroup layer 7. Leaf node has no children.
         */
        for (i = 0; i < hw->num_tx_sched_layers - 1; i++) {
                max_sibl = buf->layer_props[i + 1].max_sibl_grp_sz;
                hw->max_children[i] = le16_to_cpu(max_sibl);
        }

        hw->layer_info = devm_kmemdup(ice_hw_to_dev(hw), buf->layer_props,
                                      (hw->num_tx_sched_layers *
                                       sizeof(*hw->layer_info)),
                                      GFP_KERNEL);
        if (!hw->layer_info) {
                status = ICE_ERR_NO_MEMORY;
                goto sched_query_out;
        }

sched_query_out:
        devm_kfree(ice_hw_to_dev(hw), buf);
        return status;
}

/**
 * ice_sched_find_node_in_subtree - Find node in part of base node subtree
 * @hw: pointer to the HW struct
 * @base: pointer to the base node
 * @node: pointer to the node to search
 *
 * This function checks whether a given node is part of the base node
 * subtree or not
 */
static bool
ice_sched_find_node_in_subtree(struct ice_hw *hw, struct ice_sched_node *base,
                               struct ice_sched_node *node)
{
        u8 i;

        for (i = 0; i < base->num_children; i++) {
                struct ice_sched_node *child = base->children[i];

                if (node == child)
                        return true;

                if (child->tx_sched_layer > node->tx_sched_layer)
                        return false;

                /* this recursion is intentional, and wouldn't
                 * go more than 8 calls
                 */
                if (ice_sched_find_node_in_subtree(hw, child, node))
                        return true;
        }
        return false;
}

/**
 * ice_sched_get_free_qgrp - Scan all queue group siblings and find a free node
 * @pi: port information structure
 * @vsi_node: software VSI handle
 * @qgrp_node: first queue group node identified for scanning
 * @owner: LAN or RDMA
 *
 * This function retrieves a free LAN or RDMA queue group node by scanning
 * qgrp_node and its siblings for the queue group with the fewest number
 * of queues currently assigned.
 */
static struct ice_sched_node *
ice_sched_get_free_qgrp(struct ice_port_info *pi,
                        struct ice_sched_node *vsi_node,
                        struct ice_sched_node *qgrp_node, u8 owner)
{
        struct ice_sched_node *min_qgrp;
        u8 min_children;

        if (!qgrp_node)
                return qgrp_node;
        min_children = qgrp_node->num_children;
        if (!min_children)
                return qgrp_node;
        min_qgrp = qgrp_node;
        /* scan all queue groups until find a node which has less than the
         * minimum number of children. This way all queue group nodes get
         * equal number of shares and active. The bandwidth will be equally
         * distributed across all queues.
         */
        while (qgrp_node) {
                /* make sure the qgroup node is part of the VSI subtree */
                if (ice_sched_find_node_in_subtree(pi->hw, vsi_node, qgrp_node))
                        if (qgrp_node->num_children < min_children &&
                            qgrp_node->owner == owner) {
                                /* replace the new min queue group node */
                                min_qgrp = qgrp_node;
                                min_children = min_qgrp->num_children;
                                /* break if it has no children, */
                                if (!min_children)
                                        break;
                        }
                qgrp_node = qgrp_node->sibling;
        }
        return min_qgrp;
}

/**
 * ice_sched_get_free_qparent - Get a free LAN or RDMA queue group node
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 * @tc: branch number
 * @owner: LAN or RDMA
 *
 * This function retrieves a free LAN or RDMA queue group node
 */
struct ice_sched_node *
ice_sched_get_free_qparent(struct ice_port_info *pi, u16 vsi_handle, u8 tc,
                           u8 owner)
{
        struct ice_sched_node *vsi_node, *qgrp_node;
        struct ice_vsi_ctx *vsi_ctx;
        u16 max_children;
        u8 qgrp_layer;

        qgrp_layer = ice_sched_get_qgrp_layer(pi->hw);
        max_children = pi->hw->max_children[qgrp_layer];

        vsi_ctx = ice_get_vsi_ctx(pi->hw, vsi_handle);
        if (!vsi_ctx)
                return NULL;
        vsi_node = vsi_ctx->sched.vsi_node[tc];
        /* validate invalid VSI ID */
        if (!vsi_node)
                return NULL;

        /* get the first queue group node from VSI sub-tree */
        qgrp_node = ice_sched_get_first_node(pi, vsi_node, qgrp_layer);
        while (qgrp_node) {
                /* make sure the qgroup node is part of the VSI subtree */
                if (ice_sched_find_node_in_subtree(pi->hw, vsi_node, qgrp_node))
                        if (qgrp_node->num_children < max_children &&
                            qgrp_node->owner == owner)
                                break;
                qgrp_node = qgrp_node->sibling;
        }

        /* Select the best queue group */
        return ice_sched_get_free_qgrp(pi, vsi_node, qgrp_node, owner);
}

/**
 * ice_sched_get_vsi_node - Get a VSI node based on VSI ID
 * @hw: pointer to the HW struct
 * @tc_node: pointer to the TC node
 * @vsi_handle: software VSI handle
 *
 * This function retrieves a VSI node for a given VSI ID from a given
 * TC branch
 */
static struct ice_sched_node *
ice_sched_get_vsi_node(struct ice_hw *hw, struct ice_sched_node *tc_node,
                       u16 vsi_handle)
{
        struct ice_sched_node *node;
        u8 vsi_layer;

        vsi_layer = ice_sched_get_vsi_layer(hw);
        node = ice_sched_get_first_node(hw->port_info, tc_node, vsi_layer);

        /* Check whether it already exists */
        while (node) {
                if (node->vsi_handle == vsi_handle)
                        return node;
                node = node->sibling;
        }

        return node;
}

/**
 * ice_sched_calc_vsi_child_nodes - calculate number of VSI child nodes
 * @hw: pointer to the HW struct
 * @num_qs: number of queues
 * @num_nodes: num nodes array
 *
 * This function calculates the number of VSI child nodes based on the
 * number of queues.
 */
static void
ice_sched_calc_vsi_child_nodes(struct ice_hw *hw, u16 num_qs, u16 *num_nodes)
{
        u16 num = num_qs;
        u8 i, qgl, vsil;

        qgl = ice_sched_get_qgrp_layer(hw);
        vsil = ice_sched_get_vsi_layer(hw);

        /* calculate num nodes from queue group to VSI layer */
        for (i = qgl; i > vsil; i--) {
                /* round to the next integer if there is a remainder */
                num = DIV_ROUND_UP(num, hw->max_children[i]);

                /* need at least one node */
                num_nodes[i] = num ? num : 1;
        }
}

/**
 * ice_sched_add_vsi_child_nodes - add VSI child nodes to tree
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 * @tc_node: pointer to the TC node
 * @num_nodes: pointer to the num nodes that needs to be added per layer
 * @owner: node owner (LAN or RDMA)
 *
 * This function adds the VSI child nodes to tree. It gets called for
 * LAN and RDMA separately.
 */
static enum ice_status
ice_sched_add_vsi_child_nodes(struct ice_port_info *pi, u16 vsi_handle,
                              struct ice_sched_node *tc_node, u16 *num_nodes,
                              u8 owner)
{
        struct ice_sched_node *parent, *node;
        struct ice_hw *hw = pi->hw;
        enum ice_status status;
        u32 first_node_teid;
        u16 num_added = 0;
        u8 i, qgl, vsil;

        qgl = ice_sched_get_qgrp_layer(hw);
        vsil = ice_sched_get_vsi_layer(hw);
        parent = ice_sched_get_vsi_node(hw, tc_node, vsi_handle);
        for (i = vsil + 1; i <= qgl; i++) {
                if (!parent)
                        return ICE_ERR_CFG;

                status = ice_sched_add_nodes_to_layer(pi, tc_node, parent, i,
                                                      num_nodes[i],
                                                      &first_node_teid,
                                                      &num_added);
                if (status || num_nodes[i] != num_added)
                        return ICE_ERR_CFG;

                /* The newly added node can be a new parent for the next
                 * layer nodes
                 */
                if (num_added) {
                        parent = ice_sched_find_node_by_teid(tc_node,
                                                             first_node_teid);
                        node = parent;
                        while (node) {
                                node->owner = owner;
                                node = node->sibling;
                        }
                } else {
                        parent = parent->children[0];
                }
        }

        return 0;
}

/**
 * ice_sched_calc_vsi_support_nodes - calculate number of VSI support nodes
 * @hw: pointer to the HW struct
 * @tc_node: pointer to TC node
 * @num_nodes: pointer to num nodes array
 *
 * This function calculates the number of supported nodes needed to add this
 * VSI into Tx tree including the VSI, parent and intermediate nodes in below
 * layers
 */
static void
ice_sched_calc_vsi_support_nodes(struct ice_hw *hw,
                                 struct ice_sched_node *tc_node, u16 *num_nodes)
{
        struct ice_sched_node *node;
        u8 vsil;
        int i;

        vsil = ice_sched_get_vsi_layer(hw);
        for (i = vsil; i >= hw->sw_entry_point_layer; i--)
                /* Add intermediate nodes if TC has no children and
                 * need at least one node for VSI
                 */
                if (!tc_node->num_children || i == vsil) {
                        num_nodes[i]++;
                } else {
                        /* If intermediate nodes are reached max children
                         * then add a new one.
                         */
                        node = ice_sched_get_first_node(hw->port_info, tc_node,
                                                        (u8)i);
                        /* scan all the siblings */
                        while (node) {
                                if (node->num_children < hw->max_children[i])
                                        break;
                                node = node->sibling;
                        }

                        /* tree has one intermediate node to add this new VSI.
                         * So no need to calculate supported nodes for below
                         * layers.
                         */
                        if (node)
                                break;
                        /* all the nodes are full, allocate a new one */
                        num_nodes[i]++;
                }
}

/**
 * ice_sched_add_vsi_support_nodes - add VSI supported nodes into Tx tree
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 * @tc_node: pointer to TC node
 * @num_nodes: pointer to num nodes array
 *
 * This function adds the VSI supported nodes into Tx tree including the
 * VSI, its parent and intermediate nodes in below layers
 */
static enum ice_status
ice_sched_add_vsi_support_nodes(struct ice_port_info *pi, u16 vsi_handle,
                                struct ice_sched_node *tc_node, u16 *num_nodes)
{
        struct ice_sched_node *parent = tc_node;
        enum ice_status status;
        u32 first_node_teid;
        u16 num_added = 0;
        u8 i, vsil;

        if (!pi)
                return ICE_ERR_PARAM;

        vsil = ice_sched_get_vsi_layer(pi->hw);
        for (i = pi->hw->sw_entry_point_layer; i <= vsil; i++) {
                status = ice_sched_add_nodes_to_layer(pi, tc_node, parent,
                                                      i, num_nodes[i],
                                                      &first_node_teid,
                                                      &num_added);
                if (status || num_nodes[i] != num_added)
                        return ICE_ERR_CFG;

                /* The newly added node can be a new parent for the next
                 * layer nodes
                 */
                if (num_added)
                        parent = ice_sched_find_node_by_teid(tc_node,
                                                             first_node_teid);
                else
                        parent = parent->children[0];

                if (!parent)
                        return ICE_ERR_CFG;

                if (i == vsil)
                        parent->vsi_handle = vsi_handle;
        }

        return 0;
}

/**
 * ice_sched_add_vsi_to_topo - add a new VSI into tree
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 * @tc: TC number
 *
 * This function adds a new VSI into scheduler tree
 */
static enum ice_status
ice_sched_add_vsi_to_topo(struct ice_port_info *pi, u16 vsi_handle, u8 tc)
{
        u16 num_nodes[ICE_AQC_TOPO_MAX_LEVEL_NUM] = { 0 };
        struct ice_sched_node *tc_node;
        struct ice_hw *hw = pi->hw;

        tc_node = ice_sched_get_tc_node(pi, tc);
        if (!tc_node)
                return ICE_ERR_PARAM;

        /* calculate number of supported nodes needed for this VSI */
        ice_sched_calc_vsi_support_nodes(hw, tc_node, num_nodes);

        /* add VSI supported nodes to TC subtree */
        return ice_sched_add_vsi_support_nodes(pi, vsi_handle, tc_node,
                                               num_nodes);
}

/**
 * ice_sched_update_vsi_child_nodes - update VSI child nodes
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 * @tc: TC number
 * @new_numqs: new number of max queues
 * @owner: owner of this subtree
 *
 * This function updates the VSI child nodes based on the number of queues
 */
static enum ice_status
ice_sched_update_vsi_child_nodes(struct ice_port_info *pi, u16 vsi_handle,
                                 u8 tc, u16 new_numqs, u8 owner)
{
        u16 new_num_nodes[ICE_AQC_TOPO_MAX_LEVEL_NUM] = { 0 };
        struct ice_sched_node *vsi_node;
        struct ice_sched_node *tc_node;
        struct ice_vsi_ctx *vsi_ctx;
        enum ice_status status = 0;
        struct ice_hw *hw = pi->hw;
        u16 prev_numqs;

        tc_node = ice_sched_get_tc_node(pi, tc);
        if (!tc_node)
                return ICE_ERR_CFG;

        vsi_node = ice_sched_get_vsi_node(hw, tc_node, vsi_handle);
        if (!vsi_node)
                return ICE_ERR_CFG;

        vsi_ctx = ice_get_vsi_ctx(hw, vsi_handle);
        if (!vsi_ctx)
                return ICE_ERR_PARAM;

        prev_numqs = vsi_ctx->sched.max_lanq[tc];
        /* num queues are not changed or less than the previous number */
        if (new_numqs <= prev_numqs)
                return status;
        status = ice_alloc_lan_q_ctx(hw, vsi_handle, tc, new_numqs);
        if (status)
                return status;

        if (new_numqs)
                ice_sched_calc_vsi_child_nodes(hw, new_numqs, new_num_nodes);
        /* Keep the max number of queue configuration all the time. Update the
         * tree only if number of queues > previous number of queues. This may
         * leave some extra nodes in the tree if number of queues < previous
         * number but that wouldn't harm anything. Removing those extra nodes
         * may complicate the code if those nodes are part of SRL or
         * individually rate limited.
         */
        status = ice_sched_add_vsi_child_nodes(pi, vsi_handle, tc_node,
                                               new_num_nodes, owner);
        if (status)
                return status;
        vsi_ctx->sched.max_lanq[tc] = new_numqs;

        return 0;
}

/**
 * ice_sched_cfg_vsi - configure the new/existing VSI
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 * @tc: TC number
 * @maxqs: max number of queues
 * @owner: LAN or RDMA
 * @enable: TC enabled or disabled
 *
 * This function adds/updates VSI nodes based on the number of queues. If TC is
 * enabled and VSI is in suspended state then resume the VSI back. If TC is
 * disabled then suspend the VSI if it is not already.
 */
enum ice_status
ice_sched_cfg_vsi(struct ice_port_info *pi, u16 vsi_handle, u8 tc, u16 maxqs,
                  u8 owner, bool enable)
{
        struct ice_sched_node *vsi_node, *tc_node;
        struct ice_vsi_ctx *vsi_ctx;
        enum ice_status status = 0;
        struct ice_hw *hw = pi->hw;

        ice_debug(pi->hw, ICE_DBG_SCHED, "add/config VSI %d\n", vsi_handle);
        tc_node = ice_sched_get_tc_node(pi, tc);
        if (!tc_node)
                return ICE_ERR_PARAM;
        vsi_ctx = ice_get_vsi_ctx(hw, vsi_handle);
        if (!vsi_ctx)
                return ICE_ERR_PARAM;
        vsi_node = ice_sched_get_vsi_node(hw, tc_node, vsi_handle);

        /* suspend the VSI if TC is not enabled */
        if (!enable) {
                if (vsi_node && vsi_node->in_use) {
                        u32 teid = le32_to_cpu(vsi_node->info.node_teid);

                        status = ice_sched_suspend_resume_elems(hw, 1, &teid,
                                                                true);
                        if (!status)
                                vsi_node->in_use = false;
                }
                return status;
        }

        /* TC is enabled, if it is a new VSI then add it to the tree */
        if (!vsi_node) {
                status = ice_sched_add_vsi_to_topo(pi, vsi_handle, tc);
                if (status)
                        return status;

                vsi_node = ice_sched_get_vsi_node(hw, tc_node, vsi_handle);
                if (!vsi_node)
                        return ICE_ERR_CFG;

                vsi_ctx->sched.vsi_node[tc] = vsi_node;
                vsi_node->in_use = true;
                /* invalidate the max queues whenever VSI gets added first time
                 * into the scheduler tree (boot or after reset). We need to
                 * recreate the child nodes all the time in these cases.
                 */
                vsi_ctx->sched.max_lanq[tc] = 0;
        }

        /* update the VSI child nodes */
        status = ice_sched_update_vsi_child_nodes(pi, vsi_handle, tc, maxqs,
                                                  owner);
        if (status)
                return status;

        /* TC is enabled, resume the VSI if it is in the suspend state */
        if (!vsi_node->in_use) {
                u32 teid = le32_to_cpu(vsi_node->info.node_teid);

                status = ice_sched_suspend_resume_elems(hw, 1, &teid, false);
                if (!status)
                        vsi_node->in_use = true;
        }

        return status;
}

/**
 * ice_sched_rm_agg_vsi_entry - remove aggregator related VSI info entry
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 *
 * This function removes single aggregator VSI info entry from
 * aggregator list.
 */
static void ice_sched_rm_agg_vsi_info(struct ice_port_info *pi, u16 vsi_handle)
{
        struct ice_sched_agg_info *agg_info;
        struct ice_sched_agg_info *atmp;

        list_for_each_entry_safe(agg_info, atmp, &pi->hw->agg_list,
                                 list_entry) {
                struct ice_sched_agg_vsi_info *agg_vsi_info;
                struct ice_sched_agg_vsi_info *vtmp;

                list_for_each_entry_safe(agg_vsi_info, vtmp,
                                         &agg_info->agg_vsi_list, list_entry)
                        if (agg_vsi_info->vsi_handle == vsi_handle) {
                                list_del(&agg_vsi_info->list_entry);
                                devm_kfree(ice_hw_to_dev(pi->hw),
                                           agg_vsi_info);
                                return;
                        }
        }
}

/**
 * ice_sched_is_leaf_node_present - check for a leaf node in the sub-tree
 * @node: pointer to the sub-tree node
 *
 * This function checks for a leaf node presence in a given sub-tree node.
 */
static bool ice_sched_is_leaf_node_present(struct ice_sched_node *node)
{
        u8 i;

        for (i = 0; i < node->num_children; i++)
                if (ice_sched_is_leaf_node_present(node->children[i]))
                        return true;
        /* check for a leaf node */
        return (node->info.data.elem_type == ICE_AQC_ELEM_TYPE_LEAF);
}

/**
 * ice_sched_rm_vsi_cfg - remove the VSI and its children nodes
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 * @owner: LAN or RDMA
 *
 * This function removes the VSI and its LAN or RDMA children nodes from the
 * scheduler tree.
 */
static enum ice_status
ice_sched_rm_vsi_cfg(struct ice_port_info *pi, u16 vsi_handle, u8 owner)
{
        enum ice_status status = ICE_ERR_PARAM;
        struct ice_vsi_ctx *vsi_ctx;
        u8 i;

        ice_debug(pi->hw, ICE_DBG_SCHED, "removing VSI %d\n", vsi_handle);
        if (!ice_is_vsi_valid(pi->hw, vsi_handle))
                return status;
        mutex_lock(&pi->sched_lock);
        vsi_ctx = ice_get_vsi_ctx(pi->hw, vsi_handle);
        if (!vsi_ctx)
                goto exit_sched_rm_vsi_cfg;

        ice_for_each_traffic_class(i) {
                struct ice_sched_node *vsi_node, *tc_node;
                u8 j = 0;

                tc_node = ice_sched_get_tc_node(pi, i);
                if (!tc_node)
                        continue;

                vsi_node = ice_sched_get_vsi_node(pi->hw, tc_node, vsi_handle);
                if (!vsi_node)
                        continue;

                if (ice_sched_is_leaf_node_present(vsi_node)) {
                        ice_debug(pi->hw, ICE_DBG_SCHED,
                                  "VSI has leaf nodes in TC %d\n", i);
                        status = ICE_ERR_IN_USE;
                        goto exit_sched_rm_vsi_cfg;
                }
                while (j < vsi_node->num_children) {
                        if (vsi_node->children[j]->owner == owner) {
                                ice_free_sched_node(pi, vsi_node->children[j]);

                                /* reset the counter again since the num
                                 * children will be updated after node removal
                                 */
                                j = 0;
                        } else {
                                j++;
                        }
                }
                /* remove the VSI if it has no children */
                if (!vsi_node->num_children) {
                        ice_free_sched_node(pi, vsi_node);
                        vsi_ctx->sched.vsi_node[i] = NULL;

                        /* clean up aggregator related VSI info if any */
                        ice_sched_rm_agg_vsi_info(pi, vsi_handle);
                }
                if (owner == ICE_SCHED_NODE_OWNER_LAN)
                        vsi_ctx->sched.max_lanq[i] = 0;
        }
        status = 0;

exit_sched_rm_vsi_cfg:
        mutex_unlock(&pi->sched_lock);
        return status;
}

/**
 * ice_rm_vsi_lan_cfg - remove VSI and its LAN children nodes
 * @pi: port information structure
 * @vsi_handle: software VSI handle
 *
 * This function clears the VSI and its LAN children nodes from scheduler tree
 * for all TCs.
 */
enum ice_status ice_rm_vsi_lan_cfg(struct ice_port_info *pi, u16 vsi_handle)
{
        return ice_sched_rm_vsi_cfg(pi, vsi_handle, ICE_SCHED_NODE_OWNER_LAN);
}

/**
 * ice_sched_rm_unused_rl_prof - remove unused RL profile
 * @pi: port information structure
 *
 * This function removes unused rate limit profiles from the HW and
 * SW DB. The caller needs to hold scheduler lock.
 */
static void ice_sched_rm_unused_rl_prof(struct ice_port_info *pi)
{
        u16 ln;

        for (ln = 0; ln < pi->hw->num_tx_sched_layers; ln++) {
                struct ice_aqc_rl_profile_info *rl_prof_elem;
                struct ice_aqc_rl_profile_info *rl_prof_tmp;

                list_for_each_entry_safe(rl_prof_elem, rl_prof_tmp,
                                         &pi->rl_prof_list[ln], list_entry) {
                        if (!ice_sched_del_rl_profile(pi->hw, rl_prof_elem))
                                ice_debug(pi->hw, ICE_DBG_SCHED,
                                          "Removed rl profile\n");
                }
        }
}

/**
 * ice_sched_update_elem - update element
 * @hw: pointer to the HW struct
 * @node: pointer to node
 * @info: node info to update
 *
 * Update the HW DB, and local SW DB of node. Update the scheduling
 * parameters of node from argument info data buffer (Info->data buf) and
 * returns success or error on config sched element failure. The caller
 * needs to hold scheduler lock.
 */
static enum ice_status
ice_sched_update_elem(struct ice_hw *hw, struct ice_sched_node *node,
                      struct ice_aqc_txsched_elem_data *info)
{
        struct ice_aqc_txsched_elem_data buf;
        enum ice_status status;
        u16 elem_cfgd = 0;
        u16 num_elems = 1;

        buf = *info;
        /* Parent TEID is reserved field in this aq call */
        buf.parent_teid = 0;
        /* Element type is reserved field in this aq call */
        buf.data.elem_type = 0;
        /* Flags is reserved field in this aq call */
        buf.data.flags = 0;

        /* Update HW DB */
        /* Configure element node */
        status = ice_aq_cfg_sched_elems(hw, num_elems, &buf, sizeof(buf),
                                        &elem_cfgd, NULL);
        if (status || elem_cfgd != num_elems) {
                ice_debug(hw, ICE_DBG_SCHED, "Config sched elem error\n");
                return ICE_ERR_CFG;
        }

        /* Config success case */
        /* Now update local SW DB */
        /* Only copy the data portion of info buffer */
        node->info.data = info->data;
        return status;
}

/**
 * ice_sched_cfg_node_bw_alloc - configure node BW weight/alloc params
 * @hw: pointer to the HW struct
 * @node: sched node to configure
 * @rl_type: rate limit type CIR, EIR, or shared
 * @bw_alloc: BW weight/allocation
 *
 * This function configures node element's BW allocation.
 */
static enum ice_status
ice_sched_cfg_node_bw_alloc(struct ice_hw *hw, struct ice_sched_node *node,
                            enum ice_rl_type rl_type, u16 bw_alloc)
{
        struct ice_aqc_txsched_elem_data buf;
        struct ice_aqc_txsched_elem *data;
        enum ice_status status;

        buf = node->info;
        data = &buf.data;
        if (rl_type == ICE_MIN_BW) {
                data->valid_sections |= ICE_AQC_ELEM_VALID_CIR;
                data->cir_bw.bw_alloc = cpu_to_le16(bw_alloc);
        } else if (rl_type == ICE_MAX_BW) {
                data->valid_sections |= ICE_AQC_ELEM_VALID_EIR;
                data->eir_bw.bw_alloc = cpu_to_le16(bw_alloc);
        } else {
                return ICE_ERR_PARAM;
        }

        /* Configure element */
        status = ice_sched_update_elem(hw, node, &buf);
        return status;
}

/**
 * ice_set_clear_cir_bw - set or clear CIR BW
 * @bw_t_info: bandwidth type information structure
 * @bw: bandwidth in Kbps - Kilo bits per sec
 *
 * Save or clear CIR bandwidth (BW) in the passed param bw_t_info.
 */
static void ice_set_clear_cir_bw(struct ice_bw_type_info *bw_t_info, u32 bw)
{
        if (bw == ICE_SCHED_DFLT_BW) {
                clear_bit(ICE_BW_TYPE_CIR, bw_t_info->bw_t_bitmap);
                bw_t_info->cir_bw.bw = 0;
        } else {
                /* Save type of BW information */
                set_bit(ICE_BW_TYPE_CIR, bw_t_info->bw_t_bitmap);
                bw_t_info->cir_bw.bw = bw;
        }
}

/**
 * ice_set_clear_eir_bw - set or clear EIR BW
 * @bw_t_info: bandwidth type information structure
 * @bw: bandwidth in Kbps - Kilo bits per sec
 *
 * Save or clear EIR bandwidth (BW) in the passed param bw_t_info.
 */
static void ice_set_clear_eir_bw(struct ice_bw_type_info *bw_t_info, u32 bw)
{
        if (bw == ICE_SCHED_DFLT_BW) {
                clear_bit(ICE_BW_TYPE_EIR, bw_t_info->bw_t_bitmap);
                bw_t_info->eir_bw.bw = 0;
        } else {
                /* EIR BW and Shared BW profiles are mutually exclusive and
                 * hence only one of them may be set for any given element.
                 * First clear earlier saved shared BW information.
                 */
                clear_bit(ICE_BW_TYPE_SHARED, bw_t_info->bw_t_bitmap);
                bw_t_info->shared_bw = 0;
                /* save EIR BW information */
                set_bit(ICE_BW_TYPE_EIR, bw_t_info->bw_t_bitmap);
                bw_t_info->eir_bw.bw = bw;
        }
}

/**
 * ice_set_clear_shared_bw - set or clear shared BW
 * @bw_t_info: bandwidth type information structure
 * @bw: bandwidth in Kbps - Kilo bits per sec
 *
 * Save or clear shared bandwidth (BW) in the passed param bw_t_info.
 */
static void ice_set_clear_shared_bw(struct ice_bw_type_info *bw_t_info, u32 bw)
{
        if (bw == ICE_SCHED_DFLT_BW) {
                clear_bit(ICE_BW_TYPE_SHARED, bw_t_info->bw_t_bitmap);
                bw_t_info->shared_bw = 0;
        } else {
                /* EIR BW and Shared BW profiles are mutually exclusive and
                 * hence only one of them may be set for any given element.
                 * First clear earlier saved EIR BW information.
                 */
                clear_bit(ICE_BW_TYPE_EIR, bw_t_info->bw_t_bitmap);
                bw_t_info->eir_bw.bw = 0;
                /* save shared BW information */
                set_bit(ICE_BW_TYPE_SHARED, bw_t_info->bw_t_bitmap);
                bw_t_info->shared_bw = bw;
        }
}

/**
 * ice_sched_calc_wakeup - calculate RL profile wakeup parameter
 * @bw: bandwidth in Kbps
 *
 * This function calculates the wakeup parameter of RL profile.
 */
static u16 ice_sched_calc_wakeup(s32 bw)
{
        s64 bytes_per_sec, wakeup_int, wakeup_a, wakeup_b, wakeup_f;
        s32 wakeup_f_int;
        u16 wakeup = 0;

        /* Get the wakeup integer value */
        bytes_per_sec = div64_long(((s64)bw * 1000), BITS_PER_BYTE);
        wakeup_int = div64_long(ICE_RL_PROF_FREQUENCY, bytes_per_sec);
        if (wakeup_int > 63) {
                wakeup = (u16)((1 << 15) | wakeup_int);
        } else {
                /* Calculate fraction value up to 4 decimals
                 * Convert Integer value to a constant multiplier
                 */
                wakeup_b = (s64)ICE_RL_PROF_MULTIPLIER * wakeup_int;
                wakeup_a = div64_long((s64)ICE_RL_PROF_MULTIPLIER *
                                           ICE_RL_PROF_FREQUENCY,
                                      bytes_per_sec);

                /* Get Fraction value */
                wakeup_f = wakeup_a - wakeup_b;

                /* Round up the Fractional value via Ceil(Fractional value) */
                if (wakeup_f > div64_long(ICE_RL_PROF_MULTIPLIER, 2))
                        wakeup_f += 1;

                wakeup_f_int = (s32)div64_long(wakeup_f * ICE_RL_PROF_FRACTION,
                                               ICE_RL_PROF_MULTIPLIER);
                wakeup |= (u16)(wakeup_int << 9);
                wakeup |= (u16)(0x1ff & wakeup_f_int);
        }

        return wakeup;
}

/**
 * ice_sched_bw_to_rl_profile - convert BW to profile parameters
 * @bw: bandwidth in Kbps
 * @profile: profile parameters to return
 *
 * This function converts the BW to profile structure format.
 */
static enum ice_status
ice_sched_bw_to_rl_profile(u32 bw, struct ice_aqc_rl_profile_elem *profile)
{
        enum ice_status status = ICE_ERR_PARAM;
        s64 bytes_per_sec, ts_rate, mv_tmp;
        bool found = false;
        s32 encode = 0;
        s64 mv = 0;
        s32 i;

        /* Bw settings range is from 0.5Mb/sec to 100Gb/sec */
        if (bw < ICE_SCHED_MIN_BW || bw > ICE_SCHED_MAX_BW)
                return status;

        /* Bytes per second from Kbps */
        bytes_per_sec = div64_long(((s64)bw * 1000), BITS_PER_BYTE);

        /* encode is 6 bits but really useful are 5 bits */
        for (i = 0; i < 64; i++) {
                u64 pow_result = BIT_ULL(i);

                ts_rate = div64_long((s64)ICE_RL_PROF_FREQUENCY,
                                     pow_result * ICE_RL_PROF_TS_MULTIPLIER);
                if (ts_rate <= 0)
                        continue;

                /* Multiplier value */
                mv_tmp = div64_long(bytes_per_sec * ICE_RL_PROF_MULTIPLIER,
                                    ts_rate);

                /* Round to the nearest ICE_RL_PROF_MULTIPLIER */
                mv = round_up_64bit(mv_tmp, ICE_RL_PROF_MULTIPLIER);

                /* First multiplier value greater than the given
                 * accuracy bytes
                 */
                if (mv > ICE_RL_PROF_ACCURACY_BYTES) {
                        encode = i;
                        found = true;
                        break;
                }
        }
        if (found) {
                u16 wm;

                wm = ice_sched_calc_wakeup(bw);
                profile->rl_multiply = cpu_to_le16(mv);
                profile->wake_up_calc = cpu_to_le16(wm);
                profile->rl_encode = cpu_to_le16(encode);
                status = 0;
        } else {
                status = ICE_ERR_DOES_NOT_EXIST;
        }

        return status;
}

/**
 * ice_sched_add_rl_profile - add RL profile
 * @pi: port information structure
 * @rl_type: type of rate limit BW - min, max, or shared
 * @bw: bandwidth in Kbps - Kilo bits per sec
 * @layer_num: specifies in which layer to create profile
 *
 * This function first checks the existing list for corresponding BW
 * parameter. If it exists, it returns the associated profile otherwise
 * it creates a new rate limit profile for requested BW, and adds it to
 * the HW DB and local list. It returns the new profile or null on error.
 * The caller needs to hold the scheduler lock.
 */
static struct ice_aqc_rl_profile_info *
ice_sched_add_rl_profile(struct ice_port_info *pi,
                         enum ice_rl_type rl_type, u32 bw, u8 layer_num)
{
        struct ice_aqc_rl_profile_info *rl_prof_elem;
        u16 profiles_added = 0, num_profiles = 1;
        struct ice_aqc_rl_profile_elem *buf;
        enum ice_status status;
        struct ice_hw *hw;
        u8 profile_type;

        if (layer_num >= ICE_AQC_TOPO_MAX_LEVEL_NUM)
                return NULL;
        switch (rl_type) {
        case ICE_MIN_BW:
                profile_type = ICE_AQC_RL_PROFILE_TYPE_CIR;
                break;
        case ICE_MAX_BW:
                profile_type = ICE_AQC_RL_PROFILE_TYPE_EIR;
                break;
        case ICE_SHARED_BW:
                profile_type = ICE_AQC_RL_PROFILE_TYPE_SRL;
                break;
        default:
                return NULL;
        }

        if (!pi)
                return NULL;
        hw = pi->hw;
        list_for_each_entry(rl_prof_elem, &pi->rl_prof_list[layer_num],
                            list_entry)
                if ((rl_prof_elem->profile.flags & ICE_AQC_RL_PROFILE_TYPE_M) ==
                    profile_type && rl_prof_elem->bw == bw)
                        /* Return existing profile ID info */
                        return rl_prof_elem;

        /* Create new profile ID */
        rl_prof_elem = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*rl_prof_elem),
                                    GFP_KERNEL);

        if (!rl_prof_elem)
                return NULL;

        status = ice_sched_bw_to_rl_profile(bw, &rl_prof_elem->profile);
        if (status)
                goto exit_add_rl_prof;

        rl_prof_elem->bw = bw;
        /* layer_num is zero relative, and fw expects level from 1 to 9 */
        rl_prof_elem->profile.level = layer_num + 1;
        rl_prof_elem->profile.flags = profile_type;
        rl_prof_elem->profile.max_burst_size = cpu_to_le16(hw->max_burst_size);

        /* Create new entry in HW DB */
        buf = &rl_prof_elem->profile;
        status = ice_aq_add_rl_profile(hw, num_profiles, buf, sizeof(*buf),
                                       &profiles_added, NULL);
        if (status || profiles_added != num_profiles)
                goto exit_add_rl_prof;

        /* Good entry - add in the list */
        rl_prof_elem->prof_id_ref = 0;
        list_add(&rl_prof_elem->list_entry, &pi->rl_prof_list[layer_num]);
        return rl_prof_elem;

exit_add_rl_prof:
        devm_kfree(ice_hw_to_dev(hw), rl_prof_elem);
        return NULL;
}

/**
 * ice_sched_cfg_node_bw_lmt - configure node sched params
 * @hw: pointer to the HW struct
 * @node: sched node to configure
 * @rl_type: rate limit type CIR, EIR, or shared
 * @rl_prof_id: rate limit profile ID
 *
 * This function configures node element's BW limit.
 */
static enum ice_status
ice_sched_cfg_node_bw_lmt(struct ice_hw *hw, struct ice_sched_node *node,
                          enum ice_rl_type rl_type, u16 rl_prof_id)
{
        struct ice_aqc_txsched_elem_data buf;
        struct ice_aqc_txsched_elem *data;

        buf = node->info;
        data = &buf.data;
        switch (rl_type) {
        case ICE_MIN_BW:
                data->valid_sections |= ICE_AQC_ELEM_VALID_CIR;
                data->cir_bw.bw_profile_idx = cpu_to_le16(rl_prof_id);
                break;
        case ICE_MAX_BW:
                /* EIR BW and Shared BW profiles are mutually exclusive and
                 * hence only one of them may be set for any given element
                 */
                if (data->valid_sections & ICE_AQC_ELEM_VALID_SHARED)
                        return ICE_ERR_CFG;
                data->valid_sections |= ICE_AQC_ELEM_VALID_EIR;
                data->eir_bw.bw_profile_idx = cpu_to_le16(rl_prof_id);
                break;
        case ICE_SHARED_BW:
                /* Check for removing shared BW */
                if (rl_prof_id == ICE_SCHED_NO_SHARED_RL_PROF_ID) {
                        /* remove shared profile */
                        data->valid_sections &= ~ICE_AQC_ELEM_VALID_SHARED;
                        data->srl_id = 0; /* clear SRL field */

                        /* enable back EIR to default profile */
                        data->valid_sections |= ICE_AQC_ELEM_VALID_EIR;
                        data->eir_bw.bw_profile_idx =
                                cpu_to_le16(ICE_SCHED_DFLT_RL_PROF_ID);
                        break;
                }
                /* EIR BW and Shared BW profiles are mutually exclusive and
                 * hence only one of them may be set for any given element
                 */
                if ((data->valid_sections & ICE_AQC_ELEM_VALID_EIR) &&
                    (le16_to_cpu(data->eir_bw.bw_profile_idx) !=
                            ICE_SCHED_DFLT_RL_PROF_ID))
                        return ICE_ERR_CFG;
                /* EIR BW is set to default, disable it */
                data->valid_sections &= ~ICE_AQC_ELEM_VALID_EIR;
                /* Okay to enable shared BW now */
                data->valid_sections |= ICE_AQC_ELEM_VALID_SHARED;
                data->srl_id = cpu_to_le16(rl_prof_id);
                break;
        default:
                /* Unknown rate limit type */
                return ICE_ERR_PARAM;
        }

        /* Configure element */
        return ice_sched_update_elem(hw, node, &buf);
}

/**
 * ice_sched_get_node_rl_prof_id - get node's rate limit profile ID
 * @node: sched node
 * @rl_type: rate limit type
 *
 * If existing profile matches, it returns the corresponding rate
 * limit profile ID, otherwise it returns an invalid ID as error.
 */
static u16
ice_sched_get_node_rl_prof_id(struct ice_sched_node *node,
                              enum ice_rl_type rl_type)
{
        u16 rl_prof_id = ICE_SCHED_INVAL_PROF_ID;
        struct ice_aqc_txsched_elem *data;

        data = &node->info.data;
        switch (rl_type) {
        case ICE_MIN_BW:
                if (data->valid_sections & ICE_AQC_ELEM_VALID_CIR)
                        rl_prof_id = le16_to_cpu(data->cir_bw.bw_profile_idx);
                break;
        case ICE_MAX_BW:
                if (data->valid_sections & ICE_AQC_ELEM_VALID_EIR)
                        rl_prof_id = le16_to_cpu(data->eir_bw.bw_profile_idx);
                break;
        case ICE_SHARED_BW:
                if (data->valid_sections & ICE_AQC_ELEM_VALID_SHARED)
                        rl_prof_id = le16_to_cpu(data->srl_id);
                break;
        default:
                break;
        }

        return rl_prof_id;
}

/**
 * ice_sched_get_rl_prof_layer - selects rate limit profile creation layer
 * @pi: port information structure
 * @rl_type: type of rate limit BW - min, max, or shared
 * @layer_index: layer index
 *
 * This function returns requested profile creation layer.
 */
static u8
ice_sched_get_rl_prof_layer(struct ice_port_info *pi, enum ice_rl_type rl_type,
                            u8 layer_index)
{
        struct ice_hw *hw = pi->hw;

        if (layer_index >= hw->num_tx_sched_layers)
                return ICE_SCHED_INVAL_LAYER_NUM;
        switch (rl_type) {
        case ICE_MIN_BW:
                if (hw->layer_info[layer_index].max_cir_rl_profiles)
                        return layer_index;
                break;
        case ICE_MAX_BW:
                if (hw->layer_info[layer_index].max_eir_rl_profiles)
                        return layer_index;
                break;
        case ICE_SHARED_BW:
                /* if current layer doesn't support SRL profile creation
                 * then try a layer up or down.
                 */
                if (hw->layer_info[layer_index].max_srl_profiles)
                        return layer_index;
                else if (layer_index < hw->num_tx_sched_layers - 1 &&
                         hw->layer_info[layer_index + 1].max_srl_profiles)
                        return layer_index + 1;
                else if (layer_index > 0 &&
                         hw->layer_info[layer_index - 1].max_srl_profiles)
                        return layer_index - 1;
                break;
        default:
                break;
        }
        return ICE_SCHED_INVAL_LAYER_NUM;
}

/**
 * ice_sched_get_srl_node - get shared rate limit node
 * @node: tree node
 * @srl_layer: shared rate limit layer
 *
 * This function returns SRL node to be used for shared rate limit purpose.
 * The caller needs to hold scheduler lock.
 */
static struct ice_sched_node *
ice_sched_get_srl_node(struct ice_sched_node *node, u8 srl_layer)
{
        if (srl_layer > node->tx_sched_layer)
                return node->children[0];
        else if (srl_layer < node->tx_sched_layer)
                /* Node can't be created without a parent. It will always
                 * have a valid parent except root node.
                 */
                return node->parent;
        else
                return node;
}

/**
 * ice_sched_rm_rl_profile - remove RL profile ID
 * @pi: port information structure
 * @layer_num: layer number where profiles are saved
 * @profile_type: profile type like EIR, CIR, or SRL
 * @profile_id: profile ID to remove
 *
 * This function removes rate limit profile from layer 'layer_num' of type
 * 'profile_type' and profile ID as 'profile_id'. The caller needs to hold
 * scheduler lock.
 */
static enum ice_status
ice_sched_rm_rl_profile(struct ice_port_info *pi, u8 layer_num, u8 profile_type,
                        u16 profile_id)
{
        struct ice_aqc_rl_profile_info *rl_prof_elem;
        enum ice_status status = 0;

        if (layer_num >= ICE_AQC_TOPO_MAX_LEVEL_NUM)
                return ICE_ERR_PARAM;
        /* Check the existing list for RL profile */
        list_for_each_entry(rl_prof_elem, &pi->rl_prof_list[layer_num],
                            list_entry)
                if ((rl_prof_elem->profile.flags & ICE_AQC_RL_PROFILE_TYPE_M) ==
                    profile_type &&
                    le16_to_cpu(rl_prof_elem->profile.profile_id) ==
                    profile_id) {
                        if (rl_prof_elem->prof_id_ref)
                                rl_prof_elem->prof_id_ref--;

                        /* Remove old profile ID from database */
                        status = ice_sched_del_rl_profile(pi->hw, rl_prof_elem);
                        if (status && status != ICE_ERR_IN_USE)
                                ice_debug(pi->hw, ICE_DBG_SCHED,
                                          "Remove rl profile failed\n");
                        break;
                }
        if (status == ICE_ERR_IN_USE)
                status = 0;
        return status;
}

/**
 * ice_sched_set_node_bw_dflt - set node's bandwidth limit to default
 * @pi: port information structure
 * @node: pointer to node structure
 * @rl_type: rate limit type min, max, or shared
 * @layer_num: layer number where RL profiles are saved
 *
 * This function configures node element's BW rate limit profile ID of
 * type CIR, EIR, or SRL to default. This function needs to be called
 * with the scheduler lock held.
 */
static enum ice_status
ice_sched_set_node_bw_dflt(struct ice_port_info *pi,
                           struct ice_sched_node *node,
                           enum ice_rl_type rl_type, u8 layer_num)
{
        enum ice_status status;
        struct ice_hw *hw;
        u8 profile_type;
        u16 rl_prof_id;
        u16 old_id;

        hw = pi->hw;
        switch (rl_type) {
        case ICE_MIN_BW:
                profile_type = ICE_AQC_RL_PROFILE_TYPE_CIR;
                rl_prof_id = ICE_SCHED_DFLT_RL_PROF_ID;
                break;
        case ICE_MAX_BW:
                profile_type = ICE_AQC_RL_PROFILE_TYPE_EIR;
                rl_prof_id = ICE_SCHED_DFLT_RL_PROF_ID;
                break;
        case ICE_SHARED_BW:
                profile_type = ICE_AQC_RL_PROFILE_TYPE_SRL;
                /* No SRL is configured for default case */
                rl_prof_id = ICE_SCHED_NO_SHARED_RL_PROF_ID;
                break;
        default:
                return ICE_ERR_PARAM;
        }
        /* Save existing RL prof ID for later clean up */
        old_id = ice_sched_get_node_rl_prof_id(node, rl_type);
        /* Configure BW scheduling parameters */
        status = ice_sched_cfg_node_bw_lmt(hw, node, rl_type, rl_prof_id);
        if (status)
                return status;

        /* Remove stale RL profile ID */
        if (old_id == ICE_SCHED_DFLT_RL_PROF_ID ||
            old_id == ICE_SCHED_INVAL_PROF_ID)
                return 0;

        return ice_sched_rm_rl_profile(pi, layer_num, profile_type, old_id);
}

/**
 * ice_sched_set_eir_srl_excl - set EIR/SRL exclusiveness
 * @pi: port information structure
 * @node: pointer to node structure
 * @layer_num: layer number where rate limit profiles are saved
 * @rl_type: rate limit type min, max, or shared
 * @bw: bandwidth value
 *
 * This function prepares node element's bandwidth to SRL or EIR exclusively.
 * EIR BW and Shared BW profiles are mutually exclusive and hence only one of
 * them may be set for any given element. This function needs to be called
 * with the scheduler lock held.
 */
static enum ice_status
ice_sched_set_eir_srl_excl(struct ice_port_info *pi,
                           struct ice_sched_node *node,
                           u8 layer_num, enum ice_rl_type rl_type, u32 bw)
{
        if (rl_type == ICE_SHARED_BW) {
                /* SRL node passed in this case, it may be different node */
                if (bw == ICE_SCHED_DFLT_BW)
                        /* SRL being removed, ice_sched_cfg_node_bw_lmt()
                         * enables EIR to default. EIR is not set in this
                         * case, so no additional action is required.
                         */
                        return 0;

                /* SRL being configured, set EIR to default here.
                 * ice_sched_cfg_node_bw_lmt() disables EIR when it
                 * configures SRL
                 */
                return ice_sched_set_node_bw_dflt(pi, node, ICE_MAX_BW,
                                                  layer_num);
        } else if (rl_type == ICE_MAX_BW &&
                   node->info.data.valid_sections & ICE_AQC_ELEM_VALID_SHARED) {
                /* Remove Shared profile. Set default shared BW call
                 * removes shared profile for a node.
                 */
                return ice_sched_set_node_bw_dflt(pi, node,
                                                  ICE_SHARED_BW,
                                                  layer_num);
        }
        return 0;
}

/**
 * ice_sched_set_node_bw - set node's bandwidth
 * @pi: port information structure
 * @node: tree node
 * @rl_type: rate limit type min, max, or shared
 * @bw: bandwidth in Kbps - Kilo bits per sec
 * @layer_num: layer number
 *
 * This function adds new profile corresponding to requested BW, configures
 * node's RL profile ID of type CIR, EIR, or SRL, and removes old profile
 * ID from local database. The caller needs to hold scheduler lock.
 */
static enum ice_status
ice_sched_set_node_bw(struct ice_port_info *pi, struct ice_sched_node *node,
                      enum ice_rl_type rl_type, u32 bw, u8 layer_num)
{
        struct ice_aqc_rl_profile_info *rl_prof_info;
        enum ice_status status = ICE_ERR_PARAM;
        struct ice_hw *hw = pi->hw;
        u16 old_id, rl_prof_id;

        rl_prof_info = ice_sched_add_rl_profile(pi, rl_type, bw, layer_num);
        if (!rl_prof_info)
                return status;

        rl_prof_id = le16_to_cpu(rl_prof_info->profile.profile_id);

        /* Save existing RL prof ID for later clean up */
        old_id = ice_sched_get_node_rl_prof_id(node, rl_type);
        /* Configure BW scheduling parameters */
        status = ice_sched_cfg_node_bw_lmt(hw, node, rl_type, rl_prof_id);
        if (status)
                return status;

        /* New changes has been applied */
        /* Increment the profile ID reference count */
        rl_prof_info->prof_id_ref++;

        /* Check for old ID removal */
        if ((old_id == ICE_SCHED_DFLT_RL_PROF_ID && rl_type != ICE_SHARED_BW) ||
            old_id == ICE_SCHED_INVAL_PROF_ID || old_id == rl_prof_id)
                return 0;

        return ice_sched_rm_rl_profile(pi, layer_num,
                                       rl_prof_info->profile.flags &
                                       ICE_AQC_RL_PROFILE_TYPE_M, old_id);
}

/**
 * ice_sched_set_node_bw_lmt - set node's BW limit
 * @pi: port information structure
 * @node: tree node
 * @rl_type: rate limit type min, max, or shared
 * @bw: bandwidth in Kbps - Kilo bits per sec
 *
 * It updates node's BW limit parameters like BW RL profile ID of type CIR,
 * EIR, or SRL. The caller needs to hold scheduler lock.
 */
static enum ice_status
ice_sched_set_node_bw_lmt(struct ice_port_info *pi, struct ice_sched_node *node,
                          enum ice_rl_type rl_type, u32 bw)
{
        struct ice_sched_node *cfg_node = node;
        enum ice_status status;

        struct ice_hw *hw;
        u8 layer_num;

        if (!pi)
                return ICE_ERR_PARAM;
        hw = pi->hw;
        /* Remove unused RL profile IDs from HW and SW DB */
        ice_sched_rm_unused_rl_prof(pi);
        layer_num = ice_sched_get_rl_prof_layer(pi, rl_type,
                                                node->tx_sched_layer);
        if (layer_num >= hw->num_tx_sched_layers)
                return ICE_ERR_PARAM;

        if (rl_type == ICE_SHARED_BW) {
                /* SRL node may be different */
                cfg_node = ice_sched_get_srl_node(node, layer_num);
                if (!cfg_node)
                        return ICE_ERR_CFG;
        }
        /* EIR BW and Shared BW profiles are mutually exclusive and
         * hence only one of them may be set for any given element
         */
        status = ice_sched_set_eir_srl_excl(pi, cfg_node, layer_num, rl_type,
                                            bw);
        if (status)
                return status;
        if (bw == ICE_SCHED_DFLT_BW)
                return ice_sched_set_node_bw_dflt(pi, cfg_node, rl_type,
                                                  layer_num);
        return ice_sched_set_node_bw(pi, cfg_node, rl_type, bw, layer_num);
}

/**
 * ice_sched_set_node_bw_dflt_lmt - set node's BW limit to default
 * @pi: port information structure
 * @node: pointer to node structure
 * @rl_type: rate limit type min, max, or shared
 *
 * This function configures node element's BW rate limit profile ID of
 * type CIR, EIR, or SRL to default. This function needs to be called
 * with the scheduler lock held.
 */
static enum ice_status
ice_sched_set_node_bw_dflt_lmt(struct ice_port_info *pi,
                               struct ice_sched_node *node,
                               enum ice_rl_type rl_type)
{
        return ice_sched_set_node_bw_lmt(pi, node, rl_type,
                                         ICE_SCHED_DFLT_BW);
}

/**
 * ice_sched_validate_srl_node - Check node for SRL applicability
 * @node: sched node to configure
 * @sel_layer: selected SRL layer
 *
 * This function checks if the SRL can be applied to a selected layer node on
 * behalf of the requested node (first argument). This function needs to be
 * called with scheduler lock held.
 */
static enum ice_status
ice_sched_validate_srl_node(struct ice_sched_node *node, u8 sel_layer)
{
        /* SRL profiles are not available on all layers. Check if the
         * SRL profile can be applied to a node above or below the
         * requested node. SRL configuration is possible only if the
         * selected layer's node has single child.
         */
        if (sel_layer == node->tx_sched_layer ||
            ((sel_layer == node->tx_sched_layer + 1) &&
            node->num_children == 1) ||
            ((sel_layer == node->tx_sched_layer - 1) &&
            (node->parent && node->parent->num_children == 1)))
                return 0;

        return ICE_ERR_CFG;
}

/**
 * ice_sched_save_q_bw - save queue node's BW information
 * @q_ctx: queue context structure
 * @rl_type: rate limit type min, max, or shared
 * @bw: bandwidth in Kbps - Kilo bits per sec
 *
 * Save BW information of queue type node for post replay use.
 */
static enum ice_status
ice_sched_save_q_bw(struct ice_q_ctx *q_ctx, enum ice_rl_type rl_type, u32 bw)
{
        switch (rl_type) {
        case ICE_MIN_BW:
                ice_set_clear_cir_bw(&q_ctx->bw_t_info, bw);
                break;
        case ICE_MAX_BW:
                ice_set_clear_eir_bw(&q_ctx->bw_t_info, bw);
                break;
        case ICE_SHARED_BW:
                ice_set_clear_shared_bw(&q_ctx->bw_t_info, bw);
                break;
        default:
                return ICE_ERR_PARAM;
        }
        return 0;
}

/**
 * ice_sched_set_q_bw_lmt - sets queue BW limit
 * @pi: port information structure
 * @vsi_handle: sw VSI handle
 * @tc: traffic class
 * @q_handle: software queue handle
 * @rl_type: min, max, or shared
 * @bw: bandwidth in Kbps
 *
 * This function sets BW limit of queue scheduling node.
 */
static enum ice_status
ice_sched_set_q_bw_lmt(struct ice_port_info *pi, u16 vsi_handle, u8 tc,
                       u16 q_handle, enum ice_rl_type rl_type, u32 bw)
{
        enum ice_status status = ICE_ERR_PARAM;
        struct ice_sched_node *node;
        struct ice_q_ctx *q_ctx;

        if (!ice_is_vsi_valid(pi->hw, vsi_handle))
                return ICE_ERR_PARAM;
        mutex_lock(&pi->sched_lock);
        q_ctx = ice_get_lan_q_ctx(pi->hw, vsi_handle, tc, q_handle);
        if (!q_ctx)
                goto exit_q_bw_lmt;
        node = ice_sched_find_node_by_teid(pi->root, q_ctx->q_teid);
        if (!node) {
                ice_debug(pi->hw, ICE_DBG_SCHED, "Wrong q_teid\n");
                goto exit_q_bw_lmt;
        }

        /* Return error if it is not a leaf node */
        if (node->info.data.elem_type != ICE_AQC_ELEM_TYPE_LEAF)
                goto exit_q_bw_lmt;

        /* SRL bandwidth layer selection */
        if (rl_type == ICE_SHARED_BW) {
                u8 sel_layer; /* selected layer */

                sel_layer = ice_sched_get_rl_prof_layer(pi, rl_type,
                                                        node->tx_sched_layer);
                if (sel_layer >= pi->hw->num_tx_sched_layers) {
                        status = ICE_ERR_PARAM;
                        goto exit_q_bw_lmt;
                }
                status = ice_sched_validate_srl_node(node, sel_layer);
                if (status)
                        goto exit_q_bw_lmt;
        }

        if (bw == ICE_SCHED_DFLT_BW)
                status = ice_sched_set_node_bw_dflt_lmt(pi, node, rl_type);
        else
                status = ice_sched_set_node_bw_lmt(pi, node, rl_type, bw);

        if (!status)
                status = ice_sched_save_q_bw(q_ctx, rl_type, bw);

exit_q_bw_lmt:
        mutex_unlock(&pi->sched_lock);
        return status;
}

/**
 * ice_cfg_q_bw_lmt - configure queue BW limit
 * @pi: port information structure
 * @vsi_handle: sw VSI handle
 * @tc: traffic class
 * @q_handle: software queue handle
 * @rl_type: min, max, or shared
 * @bw: bandwidth in Kbps
 *
 * This function configures BW limit of queue scheduling node.
 */
enum ice_status
ice_cfg_q_bw_lmt(struct ice_port_info *pi, u16 vsi_handle, u8 tc,
                 u16 q_handle, enum ice_rl_type rl_type, u32 bw)
{
        return ice_sched_set_q_bw_lmt(pi, vsi_handle, tc, q_handle, rl_type,
                                      bw);
}

/**
 * ice_cfg_q_bw_dflt_lmt - configure queue BW default limit
 * @pi: port information structure
 * @vsi_handle: sw VSI handle
 * @tc: traffic class
 * @q_handle: software queue handle
 * @rl_type: min, max, or shared
 *
 * This function configures BW default limit of queue scheduling node.
 */
enum ice_status
ice_cfg_q_bw_dflt_lmt(struct ice_port_info *pi, u16 vsi_handle, u8 tc,
                      u16 q_handle, enum ice_rl_type rl_type)
{
        return ice_sched_set_q_bw_lmt(pi, vsi_handle, tc, q_handle, rl_type,
                                      ICE_SCHED_DFLT_BW);
}

/**
 * ice_cfg_rl_burst_size - Set burst size value
 * @hw: pointer to the HW struct
 * @bytes: burst size in bytes
 *
 * This function configures/set the burst size to requested new value. The new
 * burst size value is used for future rate limit calls. It doesn't change the
 * existing or previously created RL profiles.
 */
enum ice_status ice_cfg_rl_burst_size(struct ice_hw *hw, u32 bytes)
{
        u16 burst_size_to_prog;

        if (bytes < ICE_MIN_BURST_SIZE_ALLOWED ||
            bytes > ICE_MAX_BURST_SIZE_ALLOWED)
                return ICE_ERR_PARAM;
        if (ice_round_to_num(bytes, 64) <=
            ICE_MAX_BURST_SIZE_64_BYTE_GRANULARITY) {
                /* 64 byte granularity case */
                /* Disable MSB granularity bit */
                burst_size_to_prog = ICE_64_BYTE_GRANULARITY;
                /* round number to nearest 64 byte granularity */
                bytes = ice_round_to_num(bytes, 64);
                /* The value is in 64 byte chunks */
                burst_size_to_prog |= (u16)(bytes / 64);
        } else {
                /* k bytes granularity case */
                /* Enable MSB granularity bit */
                burst_size_to_prog = ICE_KBYTE_GRANULARITY;
                /* round number to nearest 1024 granularity */
                bytes = ice_round_to_num(bytes, 1024);
                /* check rounding doesn't go beyond allowed */
                if (bytes > ICE_MAX_BURST_SIZE_KBYTE_GRANULARITY)
                        bytes = ICE_MAX_BURST_SIZE_KBYTE_GRANULARITY;
                /* The value is in k bytes */
                burst_size_to_prog |= (u16)(bytes / 1024);
        }
        hw->max_burst_size = burst_size_to_prog;
        return 0;
}

/**
 * ice_sched_replay_node_prio - re-configure node priority
 * @hw: pointer to the HW struct
 * @node: sched node to configure
 * @priority: priority value
 *
 * This function configures node element's priority value. It
 * needs to be called with scheduler lock held.
 */
static enum ice_status
ice_sched_replay_node_prio(struct ice_hw *hw, struct ice_sched_node *node,
                           u8 priority)
{
        struct ice_aqc_txsched_elem_data buf;
        struct ice_aqc_txsched_elem *data;
        enum ice_status status;

        buf = node->info;
        data = &buf.data;
        data->valid_sections |= ICE_AQC_ELEM_VALID_GENERIC;
        data->generic = priority;

        /* Configure element */
        status = ice_sched_update_elem(hw, node, &buf);
        return status;
}

/**
 * ice_sched_replay_node_bw - replay node(s) BW
 * @hw: pointer to the HW struct
 * @node: sched node to configure
 * @bw_t_info: BW type information
 *
 * This function restores node's BW from bw_t_info. The caller needs
 * to hold the scheduler lock.
 */
static enum ice_status
ice_sched_replay_node_bw(struct ice_hw *hw, struct ice_sched_node *node,
                         struct ice_bw_type_info *bw_t_info)
{
        struct ice_port_info *pi = hw->port_info;
        enum ice_status status = ICE_ERR_PARAM;
        u16 bw_alloc;

        if (!node)
                return status;
        if (bitmap_empty(bw_t_info->bw_t_bitmap, ICE_BW_TYPE_CNT))
                return 0;
        if (test_bit(ICE_BW_TYPE_PRIO, bw_t_info->bw_t_bitmap)) {
                status = ice_sched_replay_node_prio(hw, node,
                                                    bw_t_info->generic);
                if (status)
                        return status;
        }
        if (test_bit(ICE_BW_TYPE_CIR, bw_t_info->bw_t_bitmap)) {
                status = ice_sched_set_node_bw_lmt(pi, node, ICE_MIN_BW,
                                                   bw_t_info->cir_bw.bw);
                if (status)
                        return status;
        }
        if (test_bit(ICE_BW_TYPE_CIR_WT, bw_t_info->bw_t_bitmap)) {
                bw_alloc = bw_t_info->cir_bw.bw_alloc;
                status = ice_sched_cfg_node_bw_alloc(hw, node, ICE_MIN_BW,
                                                     bw_alloc);
                if (status)
                        return status;
        }
        if (test_bit(ICE_BW_TYPE_EIR, bw_t_info->bw_t_bitmap)) {
                status = ice_sched_set_node_bw_lmt(pi, node, ICE_MAX_BW,
                                                   bw_t_info->eir_bw.bw);
                if (status)
                        return status;
        }
        if (test_bit(ICE_BW_TYPE_EIR_WT, bw_t_info->bw_t_bitmap)) {
                bw_alloc = bw_t_info->eir_bw.bw_alloc;
                status = ice_sched_cfg_node_bw_alloc(hw, node, ICE_MAX_BW,
                                                     bw_alloc);
                if (status)
                        return status;
        }
        if (test_bit(ICE_BW_TYPE_SHARED, bw_t_info->bw_t_bitmap))
                status = ice_sched_set_node_bw_lmt(pi, node, ICE_SHARED_BW,
                                                   bw_t_info->shared_bw);
        return status;
}

/**
 * ice_sched_replay_q_bw - replay queue type node BW
 * @pi: port information structure
 * @q_ctx: queue context structure
 *
 * This function replays queue type node bandwidth. This function needs to be
 * called with scheduler lock held.
 */
enum ice_status
ice_sched_replay_q_bw(struct ice_port_info *pi, struct ice_q_ctx *q_ctx)
{
        struct ice_sched_node *q_node;

        /* Following also checks the presence of node in tree */
        q_node = ice_sched_find_node_by_teid(pi->root, q_ctx->q_teid);
        if (!q_node)
                return ICE_ERR_PARAM;
        return ice_sched_replay_node_bw(pi->hw, q_node, &q_ctx->bw_t_info);
}