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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018, Intel Corporation. */
#include "ice_sched.h"
/**
* 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)
{
struct ice_aqc_add_move_delete_elem *cmd;
struct ice_aq_desc desc;
enum ice_status status;
cmd = &desc.params.add_move_delete_elem;
ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_delete_sched_elems);
desc.flags |= cpu_to_le16(ICE_AQ_FLAG_RD);
cmd->num_grps_req = cpu_to_le16(grps_req);
status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
if (!status && grps_del)
*grps_del = le16_to_cpu(cmd->num_grps_updated);
return status;
}
/**
* 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 elements failed\n");
devm_kfree(ice_hw_to_dev(hw), buf);
return status;
}
/**
* ice_sched_get_first_node - get the first node of the given layer
* @hw: pointer to the hw struct
* @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_hw *hw, struct ice_sched_node *parent,
u8 layer)
{
u8 i;
if (layer < hw->sw_entry_point_layer)
return NULL;
for (i = 0; i < parent->num_children; i++) {
struct ice_sched_node *node = parent->children[i];
if (node) {
if (node->tx_sched_layer == layer)
return node;
/* this recursion is intentional, and wouldn't
* go more than 9 calls
*/
return ice_sched_get_first_node(hw, node, layer);
}
}
return NULL;
}
/**
* 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)
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);
enum ice_status status;
status = ice_sched_remove_elems(hw, node->parent, 1, &teid);
if (status)
ice_debug(hw, ICE_DBG_SCHED,
"remove element failed %d\n", status);
}
parent = node->parent;
/* root has no parent */
if (parent) {
struct ice_sched_node *p, *tc_node;
/* 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;
}
/* search for previous sibling that points to this node and
* remove the reference
*/
tc_node = ice_sched_get_tc_node(pi, node->tc_num);
if (!tc_node) {
ice_debug(hw, ICE_DBG_SCHED,
"Invalid TC number %d\n", node->tc_num);
goto err_exit;
}
p = ice_sched_get_first_node(hw, tc_node, node->tx_sched_layer);
while (p) {
if (p->sibling == node) {
p->sibling = node->sibling;
break;
}
p = p->sibling;
}
}
err_exit:
/* 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_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_clear_tx_topo - clears the schduler 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)
{
struct ice_sched_agg_info *agg_info;
struct ice_sched_vsi_info *vsi_elem;
struct ice_sched_agg_info *atmp;
struct ice_sched_vsi_info *tmp;
struct ice_hw *hw;
if (!pi)
return;
hw = pi->hw;
list_for_each_entry_safe(agg_info, atmp, &pi->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);
}
}
/* remove the vsi list */
list_for_each_entry_safe(vsi_elem, tmp, &pi->vsi_info_list,
list_entry) {
list_del(&vsi_elem->list_entry);
devm_kfree(ice_hw_to_dev(hw), vsi_elem);
}
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
*/
static 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
*/
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