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code / linux / torvalds / linux / 615457a226f042bffc3a1532afb244cab37460d4 / . / drivers / net / ethernet / intel / ice / ice_sched.c
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// 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_get_elem *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_sched_node *parent;
struct ice_aqc_get_elem elem;
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 additing 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;
memcpy(&node->info, &elem.generic[0], sizeof(node->info));
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 = sizeof(*buf) + sizeof(u32) * (num_nodes - 1);
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_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,
struct ice_aqc_suspend_resume_elem *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,
struct ice_aqc_suspend_resume_elem *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)
{
struct ice_aqc_suspend_resume_elem *buf;
u16 i, buf_size, num_elem_ret = 0;
enum ice_status status;
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->teid[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_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;
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;
}
if (hw->port_info)
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 - 1);
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);
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; i++) {
max_sibl = buf->layer_props[i].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_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 = NULL;
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)
goto lan_q_exit;
/* 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;
}
lan_q_exit:
return qgrp_node;
}
/**
* 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);
}