/** * 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.
*/ staticint
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 -EINVAL;
hw = pi->hw;
root = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*root), GFP_KERNEL); if (!root) return -ENOMEM;
/** * 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_sched_find_next_vsi_node - find the next node for a given VSI * @vsi_node: VSI support node to start search with * * Return: Next VSI support node, or NULL. * * The function returns a pointer to the next node from the VSI layer * assigned to the given VSI, or NULL if there is no such a node.
*/ staticstruct ice_sched_node *
ice_sched_find_next_vsi_node(struct ice_sched_node *vsi_node)
{ unsignedint vsi_handle = vsi_node->vsi_handle;
while ((vsi_node = vsi_node->sibling) != NULL) if (vsi_node->vsi_handle == vsi_handle) break;
return vsi_node;
}
/** * 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)
*/ staticint
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 libie_aq_desc desc; int 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)
*/ int
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 * @prealloc_node: preallocated ice_sched_node struct for SW DB * * This function inserts a scheduler node to the SW DB.
*/ int
ice_sched_add_node(struct ice_port_info *pi, u8 layer, struct ice_aqc_txsched_elem_data *info, struct ice_sched_node *prealloc_node)
{ struct ice_aqc_txsched_elem_data elem; struct ice_sched_node *parent; struct ice_sched_node *node; struct ice_hw *hw; int status;
if (!pi) return -EINVAL;
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 -EINVAL;
}
/* 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;
if (prealloc_node)
node = prealloc_node; else
node = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*node), GFP_KERNEL); if (!node) return -ENOMEM; if (hw->max_children[layer]) {
node->children = devm_kcalloc(ice_hw_to_dev(hw),
hw->max_children[layer], sizeof(*node->children), GFP_KERNEL); if (!node->children) {
devm_kfree(ice_hw_to_dev(hw), node); return -ENOMEM;
}
}
/** * 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
*/ staticstruct 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, 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;
}
/** * 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)
*/ staticint
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)
*/ staticint
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_move_sched_elems - move scheduler element (just 1 group) * @hw: pointer to the HW struct * @buf: pointer to buffer * @buf_size: buffer size in bytes * @grps_movd: returns total number of groups moved * * Move scheduling elements (0x0408)
*/ int
ice_aq_move_sched_elems(struct ice_hw *hw, struct ice_aqc_move_elem *buf,
u16 buf_size, u16 *grps_movd)
{ return ice_aqc_send_sched_elem_cmd(hw, ice_aqc_opc_move_sched_elems,
1, buf, buf_size, grps_movd, NULL);
}
/** * 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)
*/ staticint
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)
*/ staticint
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)
*/ staticint
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 libie_aq_desc desc;
/** * 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
*/ int
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;
__le32 *buf; int 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
*/ staticint
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;
u16 idx;
vsi_ctx = ice_get_vsi_ctx(hw, vsi_handle); if (!vsi_ctx) return -EINVAL; /* allocate LAN queue contexts */ if (!vsi_ctx->lan_q_ctx[tc]) {
q_ctx = devm_kcalloc(ice_hw_to_dev(hw), new_numqs, sizeof(*q_ctx), GFP_KERNEL); if (!q_ctx) return -ENOMEM;
/** * ice_alloc_rdma_q_ctx - allocate RDMA 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
*/ staticint
ice_alloc_rdma_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 -EINVAL; /* allocate RDMA queue contexts */ if (!vsi_ctx->rdma_q_ctx[tc]) {
vsi_ctx->rdma_q_ctx[tc] = devm_kcalloc(ice_hw_to_dev(hw),
new_numqs, sizeof(*q_ctx),
GFP_KERNEL); if (!vsi_ctx->rdma_q_ctx[tc]) return -ENOMEM;
vsi_ctx->num_rdma_q_entries[tc] = new_numqs; return 0;
} /* num queues are increased, update the queue contexts */ if (new_numqs > vsi_ctx->num_rdma_q_entries[tc]) {
u16 prev_num = vsi_ctx->num_rdma_q_entries[tc];
/** * 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)
*/ staticint
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)
*/ staticint
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.
*/ staticint
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;
u16 num_profiles = 1; int status;
if (rl_info->prof_id_ref != 0) return -EBUSY;
/* 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 -EIO;
/* 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.
*/ staticvoid ice_sched_clear_rl_prof(struct ice_port_info *pi)
{
u16 ln;
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;
/** * 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.
*/ staticvoid 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;
/** * 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;
/** * 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 * @prealloc_nodes: preallocated nodes struct for software DB * * This function add nodes to HW as well as to SW DB for a given layer
*/ int
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 **prealloc_nodes)
{ struct ice_sched_node *prev, *new_node; struct ice_aqc_add_elem *buf;
u16 i, num_groups_added = 0; struct ice_hw *hw = pi->hw;
size_t buf_size; int status = 0;
u32 teid;
*num_nodes_added = num_nodes; /* add nodes to the SW DB */ for (i = 0; i < num_nodes; i++) { if (prealloc_nodes)
status = ice_sched_add_node(pi, layer, &buf->generic[i], prealloc_nodes[i]); else
status = ice_sched_add_node(pi, layer, &buf->generic[i], NULL);
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;
}
/** * ice_sched_add_nodes_to_hw_layer - Add nodes to HW 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 * * Add nodes into specific HW layer.
*/ staticint
ice_sched_add_nodes_to_hw_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)
{
u16 max_child_nodes;
*num_nodes_added = 0;
if (!num_nodes) return 0;
if (!parent || layer < pi->hw->sw_entry_point_layer) return -EINVAL;
/* max children per node per layer */
max_child_nodes = pi->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 -EIO; return -ENOSPC;
}
/** * 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.
*/ int
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 = num_nodes; int status = 0;
status = ice_sched_add_nodes_to_hw_layer(pi, tc_node, parent,
layer, new_num_nodes,
first_teid_ptr,
&num_added); if (!status)
*num_nodes_added += num_added; /* added more nodes than requested ? */ if (*num_nodes_added > num_nodes) {
ice_debug(pi->hw, ICE_DBG_SCHED, "added extra nodes %d %d\n", num_nodes,
*num_nodes_added);
status = -EIO; break;
} /* break if all the nodes are added successfully */ if (!status && (*num_nodes_added == num_nodes)) break; /* break if the error is not max limit */ if (status && status != -ENOSPC) break; /* Exceeded the max children */
max_child_nodes = pi->hw->max_children[parent->tx_sched_layer]; /* 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;
} else { /* This parent is full, * try the next available sibling.
*/
parent = ice_sched_find_next_vsi_node(parent); /* 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;
/** * 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
*/
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_SCHED_9_LAYERS) return hw->num_tx_sched_layers - ICE_VSI_LAYER_OFFSET; elseif (hw->num_tx_sched_layers == ICE_SCHED_5_LAYERS) /* qgroup and VSI layers are same */ return hw->num_tx_sched_layers - ICE_QGRP_LAYER_OFFSET; return hw->sw_entry_point_layer;
}
/** * ice_sched_get_agg_layer - get the current aggregator layer number * @hw: pointer to the HW struct * * This function returns the current aggregator layer number
*/
u8 ice_sched_get_agg_layer(struct ice_hw *hw)
{ /* Num Layers aggregator layer * 9 4 * 7 or less sw_entry_point_layer
*/ /* calculate the aggregator layer based on number of layers. */ if (hw->num_tx_sched_layers == ICE_SCHED_9_LAYERS) return hw->num_tx_sched_layers - ICE_AGG_LAYER_OFFSET; else 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
*/ staticvoid 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); int status;
/* remove the default leaf node */
status = ice_sched_remove_elems(pi->hw, node->parent, 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
*/ staticvoid 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.
*/ int ice_sched_init_port(struct ice_port_info *pi)
{ struct ice_aqc_get_topo_elem *buf; struct ice_hw *hw;
u8 num_branches;
u16 num_elems; int status;
u8 i, j;
if (!pi) return -EINVAL;
hw = pi->hw;
/* Query the Default Topology from FW */
buf = kzalloc(ICE_AQ_MAX_BUF_LEN, GFP_KERNEL); if (!buf) return -ENOMEM;
/* 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 = -EINVAL; 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 = -EINVAL; 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], NULL); 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]);
/** * 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
*/ int ice_sched_query_res_alloc(struct ice_hw *hw)
{ struct ice_aqc_query_txsched_res_resp *buf;
__le16 max_sibl; int status = 0;
u16 i;
if (hw->layer_info) return status;
buf = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*buf), GFP_KERNEL); if (!buf) return -ENOMEM;
status = ice_aq_query_sched_res(hw, sizeof(*buf), buf, NULL); if (status) goto sched_query_out;
/* 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 = -ENOMEM; goto sched_query_out;
}
/** * ice_sched_get_psm_clk_freq - determine the PSM clock frequency * @hw: pointer to the HW struct * * Determine the PSM clock frequency and store in HW struct
*/ void ice_sched_get_psm_clk_freq(struct ice_hw *hw)
{
u32 val, clk_src;
val = rd32(hw, GLGEN_CLKSTAT_SRC);
clk_src = FIELD_GET(GLGEN_CLKSTAT_SRC_PSM_CLK_SRC_M, val);
switch (clk_src) { case PSM_CLK_SRC_367_MHZ:
hw->psm_clk_freq = ICE_PSM_CLK_367MHZ_IN_HZ; break; case PSM_CLK_SRC_416_MHZ:
hw->psm_clk_freq = ICE_PSM_CLK_416MHZ_IN_HZ; break; case PSM_CLK_SRC_446_MHZ:
hw->psm_clk_freq = ICE_PSM_CLK_446MHZ_IN_HZ; break; case PSM_CLK_SRC_390_MHZ:
hw->psm_clk_freq = ICE_PSM_CLK_390MHZ_IN_HZ; break; default:
ice_debug(hw, ICE_DBG_SCHED, "PSM clk_src unexpected %u\n",
clk_src); /* fall back to a safe default */
hw->psm_clk_freq = ICE_PSM_CLK_446MHZ_IN_HZ;
}
}
/** * 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
*/ staticbool
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) returntrue;
if (child->tx_sched_layer > node->tx_sched_layer) returnfalse;
/* this recursion is intentional, and wouldn't * go more than 8 calls
*/ if (ice_sched_find_node_in_subtree(hw, child, node)) returntrue;
} returnfalse;
}
/** * 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.
*/ staticstruct 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;
u8 qgrp_layer, vsi_layer;
u16 max_children;
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;
/* If the queue group and VSI layer are same then queues * are all attached directly to VSI
*/ if (qgrp_layer == vsi_layer) return vsi_node;
/* 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) { struct ice_sched_node *next_vsi_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; if (qgrp_node) continue;
next_vsi_node = ice_sched_find_next_vsi_node(vsi_node); if (!next_vsi_node) break;
/* 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 * @pi: pointer to the port information structure * @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
*/ staticstruct ice_sched_node *
ice_sched_get_vsi_node(struct ice_port_info *pi, struct ice_sched_node *tc_node,
u16 vsi_handle)
{ struct ice_sched_node *node;
u8 vsi_layer;
/* Check whether it already exists */ while (node) { if (node->vsi_handle == vsi_handle) return node;
node = node->sibling;
}
return node;
}
/** * ice_sched_get_agg_node - Get an aggregator node based on aggregator ID * @pi: pointer to the port information structure * @tc_node: pointer to the TC node * @agg_id: aggregator ID * * This function retrieves an aggregator node for a given aggregator ID from * a given TC branch
*/ struct ice_sched_node *
ice_sched_get_agg_node(struct ice_port_info *pi, struct ice_sched_node *tc_node,
u32 agg_id)
{ struct ice_sched_node *node; struct ice_hw *hw = pi->hw;
u8 agg_layer;
/* Check whether it already exists */ while (node) { if (node->agg_id == agg_id) 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_new_qs: number of new queues that will be added to the tree * @num_nodes: num nodes array * * This function calculates the number of VSI child nodes based on the * number of queues.
*/ staticvoid
ice_sched_calc_vsi_child_nodes(struct ice_hw *hw, u16 num_new_qs, u16 *num_nodes)
{
u16 num = num_new_qs;
u8 i, qgl, vsil;
/* 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.
*/ staticint
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;
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(pi, tc_node, vsi_handle); for (i = vsil + 1; i <= qgl; i++) { int status;
if (!parent) return -EIO;
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 -EIO;
/* 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 * @pi: pointer to the port info structure * @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
*/ staticvoid
ice_sched_calc_vsi_support_nodes(struct ice_port_info *pi, struct ice_sched_node *tc_node, u16 *num_nodes)
{ struct ice_sched_node *node;
u8 vsil; int i;
vsil = ice_sched_get_vsi_layer(pi->hw); for (i = vsil; i >= pi->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(pi, tc_node, (u8)i); /* scan all the siblings */ while (node) { if (node->num_children < pi->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
*/ staticint
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;
u32 first_node_teid;
u16 num_added = 0;
u8 i, vsil;
if (!pi) return -EINVAL;
vsil = ice_sched_get_vsi_layer(pi->hw); for (i = pi->hw->sw_entry_point_layer; i <= vsil; i++) { int status;
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 -EIO;
/* 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 -EIO;
/* Do not modify the VSI handle for already existing VSI nodes, * (if no new VSI node was added to the tree). * Assign the VSI handle only to newly added VSI nodes.
*/ if (i == vsil && num_added)
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
*/ staticint
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;
tc_node = ice_sched_get_tc_node(pi, tc); if (!tc_node) return -EINVAL;
/* calculate number of supported nodes needed for this VSI */
ice_sched_calc_vsi_support_nodes(pi, 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_recalc_vsi_support_nodes - recalculate VSI support nodes count * @hw: pointer to the HW struct * @vsi_node: pointer to the leftmost VSI node that needs to be extended * @new_numqs: new number of queues that has to be handled by the VSI * @new_num_nodes: pointer to nodes count table to modify the VSI layer entry * * This function recalculates the number of supported nodes that need to * be added after adding more Tx queues for a given VSI. * The number of new VSI support nodes that shall be added will be saved * to the @new_num_nodes table for the VSI layer.
*/ staticvoid
ice_sched_recalc_vsi_support_nodes(struct ice_hw *hw, struct ice_sched_node *vsi_node, unsignedint new_numqs, u16 *new_num_nodes)
{
u32 vsi_nodes_cnt = 1;
u32 max_queue_cnt = 1;
u32 qgl, vsil;
/** * 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
*/ staticint
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; struct ice_hw *hw = pi->hw;
u16 prev_numqs; int status = 0;
tc_node = ice_sched_get_tc_node(pi, tc); if (!tc_node) return -EIO;
vsi_node = ice_sched_get_vsi_node(pi, tc_node, vsi_handle); if (!vsi_node) return -EIO;
vsi_ctx = ice_get_vsi_ctx(hw, vsi_handle); if (!vsi_ctx) return -EINVAL;
if (owner == ICE_SCHED_NODE_OWNER_LAN)
prev_numqs = vsi_ctx->sched.max_lanq[tc]; else
prev_numqs = vsi_ctx->sched.max_rdmaq[tc]; /* num queues are not changed or less than the previous number */ if (new_numqs <= prev_numqs) return status; if (owner == ICE_SCHED_NODE_OWNER_LAN) {
status = ice_alloc_lan_q_ctx(hw, vsi_handle, tc, new_numqs); if (status) return status;
} else {
status = ice_alloc_rdma_q_ctx(hw, vsi_handle, tc, new_numqs); if (status) return status;
}
/* Never decrease the number of queues in the tree. 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. * Also, add the required VSI support nodes if the existing ones cannot * handle the requested new number of queues.
*/
status = ice_sched_add_vsi_support_nodes(pi, vsi_handle, tc_node,
new_num_nodes); if (status) return status;
status = ice_sched_add_vsi_child_nodes(pi, vsi_handle, tc_node,
new_num_nodes, owner); if (status) return status; if (owner == ICE_SCHED_NODE_OWNER_LAN)
vsi_ctx->sched.max_lanq[tc] = new_numqs; else
vsi_ctx->sched.max_rdmaq[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.
*/ int
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; struct ice_hw *hw = pi->hw; int status = 0;
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 -EINVAL;
vsi_ctx = ice_get_vsi_ctx(hw, vsi_handle); if (!vsi_ctx) return -EINVAL;
vsi_node = ice_sched_get_vsi_node(pi, 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(pi, tc_node, vsi_handle); if (!vsi_node) return -EIO;
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;
vsi_ctx->sched.max_rdmaq[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_info - 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.
*/ staticvoid 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;
/** * 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.
*/ staticbool 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])) returntrue; /* check for a leaf node */ return (node->info.data.elem_type == ICE_AQC_ELEM_TYPE_LEAF);
}
/** * ice_sched_rm_vsi_subtree - remove all nodes assigned to a given VSI * @pi: port information structure * @vsi_node: pointer to the leftmost node of the VSI to be removed * @owner: LAN or RDMA * @tc: TC number * * Return: Zero in case of success, or -EBUSY if the VSI has leaf nodes in TC. * * This function removes all the VSI support nodes associated with a given VSI * and its LAN or RDMA children nodes from the scheduler tree.
*/ staticint
ice_sched_rm_vsi_subtree(struct ice_port_info *pi, struct ice_sched_node *vsi_node, u8 owner, u8 tc)
{
u16 vsi_handle = vsi_node->vsi_handle; bool all_vsi_nodes_removed = true; int j = 0;
while (vsi_node) { struct ice_sched_node *next_vsi_node;
if (ice_sched_is_leaf_node_present(vsi_node)) {
ice_debug(pi->hw, ICE_DBG_SCHED, "VSI has leaf nodes in TC %d\n", tc); return -EBUSY;
} while (j < vsi_node->num_children) { if (vsi_node->children[j]->owner == owner)
ice_free_sched_node(pi, vsi_node->children[j]); else
j++;
}
/* remove the VSI if it has no children */ if (!vsi_node->num_children)
ice_free_sched_node(pi, vsi_node); else
all_vsi_nodes_removed = false;
vsi_node = next_vsi_node;
}
/* clean up aggregator related VSI info if any */ if (all_vsi_nodes_removed)
ice_sched_rm_agg_vsi_info(pi, vsi_handle);
return 0;
}
/** * 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.
*/ staticint
ice_sched_rm_vsi_cfg(struct ice_port_info *pi, u16 vsi_handle, u8 owner)
{ struct ice_vsi_ctx *vsi_ctx; int status = -EINVAL;
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_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.
*/ int 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_rm_vsi_rdma_cfg - remove VSI and its RDMA children nodes * @pi: port information structure * @vsi_handle: software VSI handle * * This function clears the VSI and its RDMA children nodes from scheduler tree * for all TCs.
*/ int ice_rm_vsi_rdma_cfg(struct ice_port_info *pi, u16 vsi_handle)
{ return ice_sched_rm_vsi_cfg(pi, vsi_handle, ICE_SCHED_NODE_OWNER_RDMA);
}
/** * ice_get_agg_info - get the aggregator ID * @hw: pointer to the hardware structure * @agg_id: aggregator ID * * This function validates aggregator ID. The function returns info if * aggregator ID is present in list otherwise it returns null.
*/ staticstruct ice_sched_agg_info *
ice_get_agg_info(struct ice_hw *hw, u32 agg_id)
{ struct ice_sched_agg_info *agg_info;
list_for_each_entry(agg_info, &hw->agg_list, list_entry) if (agg_info->agg_id == agg_id) return agg_info;
return NULL;
}
/** * ice_sched_get_free_vsi_parent - Find a free parent node in aggregator subtree * @hw: pointer to the HW struct * @node: pointer to a child node * @num_nodes: num nodes count array * * This function walks through the aggregator subtree to find a free parent * node
*/ struct ice_sched_node *
ice_sched_get_free_vsi_parent(struct ice_hw *hw, struct ice_sched_node *node,
u16 *num_nodes)
{
u8 l = node->tx_sched_layer;
u8 vsil, i;
vsil = ice_sched_get_vsi_layer(hw);
/* Is it VSI parent layer ? */ if (l == vsil - 1) return (node->num_children < hw->max_children[l]) ? node : NULL;
/* We have intermediate nodes. Let's walk through the subtree. If the * intermediate node has space to add a new node then clear the count
*/ if (node->num_children < hw->max_children[l])
num_nodes[l] = 0; /* The below recursive call is intentional and wouldn't go more than * 2 or 3 iterations.
*/
for (i = 0; i < node->num_children; i++) { struct ice_sched_node *parent;
parent = ice_sched_get_free_vsi_parent(hw, node->children[i],
num_nodes); if (parent) return parent;
}
return NULL;
}
/** * ice_sched_update_parent - update the new parent in SW DB * @new_parent: pointer to a new parent node * @node: pointer to a child node * * This function removes the child from the old parent and adds it to a new * parent
*/ void
ice_sched_update_parent(struct ice_sched_node *new_parent, struct ice_sched_node *node)
{ struct ice_sched_node *old_parent;
u8 i, j;
old_parent = node->parent;
/* update the old parent children */ for (i = 0; i < old_parent->num_children; i++) if (old_parent->children[i] == node) { for (j = i + 1; j < old_parent->num_children; j++)
old_parent->children[j - 1] =
old_parent->children[j];
old_parent->num_children--; break;
}
/* now move the node to a new parent */
new_parent->children[new_parent->num_children++] = node;
--> --------------------
--> maximum size reached
--> --------------------
Messung V0.5
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