// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
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/* QLogic qed NIC Driver
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* Copyright (c) 2015-2017 QLogic Corporation
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* Copyright (c) 2019-2020 Marvell International Ltd.
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*/
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#include <linux/types.h>
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#include <linux/dma-mapping.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include "qed.h"
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#include "qed_iscsi.h"
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#include "qed_ll2.h"
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#include "qed_ooo.h"
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#include "qed_cxt.h"
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static struct qed_ooo_archipelago
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*qed_ooo_seek_archipelago(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info
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*p_ooo_info,
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u32 cid)
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{
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u32 idx = (cid & 0xffff) - p_ooo_info->cid_base;
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struct qed_ooo_archipelago *p_archipelago;
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if (idx >= p_ooo_info->max_num_archipelagos)
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return NULL;
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p_archipelago = &p_ooo_info->p_archipelagos_mem[idx];
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if (list_empty(&p_archipelago->isles_list))
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return NULL;
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return p_archipelago;
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}
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static struct qed_ooo_isle *qed_ooo_seek_isle(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info,
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u32 cid, u8 isle)
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{
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struct qed_ooo_archipelago *p_archipelago = NULL;
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struct qed_ooo_isle *p_isle = NULL;
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u8 the_num_of_isle = 1;
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p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
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if (!p_archipelago) {
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DP_NOTICE(p_hwfn,
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"Connection %d is not found in OOO list\n", cid);
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return NULL;
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}
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list_for_each_entry(p_isle, &p_archipelago->isles_list, list_entry) {
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if (the_num_of_isle == isle)
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return p_isle;
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the_num_of_isle++;
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}
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return NULL;
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}
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void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info,
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struct ooo_opaque *p_cqe)
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{
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struct qed_ooo_history *p_history = &p_ooo_info->ooo_history;
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if (p_history->head_idx == p_history->num_of_cqes)
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p_history->head_idx = 0;
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p_history->p_cqes[p_history->head_idx] = *p_cqe;
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p_history->head_idx++;
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}
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int qed_ooo_alloc(struct qed_hwfn *p_hwfn)
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{
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u16 max_num_archipelagos = 0, cid_base;
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struct qed_ooo_info *p_ooo_info;
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enum protocol_type proto;
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u16 max_num_isles = 0;
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u32 i;
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switch (p_hwfn->hw_info.personality) {
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case QED_PCI_ISCSI:
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proto = PROTOCOLID_ISCSI;
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break;
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case QED_PCI_ETH_RDMA:
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case QED_PCI_ETH_IWARP:
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proto = PROTOCOLID_IWARP;
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break;
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default:
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DP_NOTICE(p_hwfn,
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"Failed to allocate qed_ooo_info: unknown personality\n");
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return -EINVAL;
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}
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max_num_archipelagos = (u16)qed_cxt_get_proto_cid_count(p_hwfn, proto,
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NULL);
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max_num_isles = QED_MAX_NUM_ISLES + max_num_archipelagos;
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cid_base = (u16)qed_cxt_get_proto_cid_start(p_hwfn, proto);
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if (!max_num_archipelagos) {
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DP_NOTICE(p_hwfn,
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"Failed to allocate qed_ooo_info: unknown amount of connections\n");
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return -EINVAL;
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}
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p_ooo_info = kzalloc(sizeof(*p_ooo_info), GFP_KERNEL);
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if (!p_ooo_info)
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return -ENOMEM;
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p_ooo_info->cid_base = cid_base;
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p_ooo_info->max_num_archipelagos = max_num_archipelagos;
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INIT_LIST_HEAD(&p_ooo_info->free_buffers_list);
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INIT_LIST_HEAD(&p_ooo_info->ready_buffers_list);
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INIT_LIST_HEAD(&p_ooo_info->free_isles_list);
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p_ooo_info->p_isles_mem = kcalloc(max_num_isles,
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sizeof(struct qed_ooo_isle),
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GFP_KERNEL);
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if (!p_ooo_info->p_isles_mem)
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goto no_isles_mem;
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for (i = 0; i < max_num_isles; i++) {
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INIT_LIST_HEAD(&p_ooo_info->p_isles_mem[i].buffers_list);
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list_add_tail(&p_ooo_info->p_isles_mem[i].list_entry,
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&p_ooo_info->free_isles_list);
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}
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p_ooo_info->p_archipelagos_mem =
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kcalloc(max_num_archipelagos,
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sizeof(struct qed_ooo_archipelago),
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GFP_KERNEL);
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if (!p_ooo_info->p_archipelagos_mem)
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goto no_archipelagos_mem;
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for (i = 0; i < max_num_archipelagos; i++)
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INIT_LIST_HEAD(&p_ooo_info->p_archipelagos_mem[i].isles_list);
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p_ooo_info->ooo_history.p_cqes =
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kcalloc(QED_MAX_NUM_OOO_HISTORY_ENTRIES,
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sizeof(struct ooo_opaque),
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GFP_KERNEL);
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if (!p_ooo_info->ooo_history.p_cqes)
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goto no_history_mem;
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p_ooo_info->ooo_history.num_of_cqes = QED_MAX_NUM_OOO_HISTORY_ENTRIES;
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p_hwfn->p_ooo_info = p_ooo_info;
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return 0;
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no_history_mem:
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kfree(p_ooo_info->p_archipelagos_mem);
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no_archipelagos_mem:
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kfree(p_ooo_info->p_isles_mem);
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no_isles_mem:
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kfree(p_ooo_info);
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return -ENOMEM;
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}
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void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info, u32 cid)
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{
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struct qed_ooo_archipelago *p_archipelago;
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struct qed_ooo_buffer *p_buffer;
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struct qed_ooo_isle *p_isle;
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p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
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if (!p_archipelago)
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return;
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while (!list_empty(&p_archipelago->isles_list)) {
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p_isle = list_first_entry(&p_archipelago->isles_list,
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struct qed_ooo_isle, list_entry);
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list_del(&p_isle->list_entry);
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while (!list_empty(&p_isle->buffers_list)) {
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p_buffer = list_first_entry(&p_isle->buffers_list,
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struct qed_ooo_buffer,
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list_entry);
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if (!p_buffer)
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break;
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list_move_tail(&p_buffer->list_entry,
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&p_ooo_info->free_buffers_list);
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}
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list_add_tail(&p_isle->list_entry,
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&p_ooo_info->free_isles_list);
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}
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}
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void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info)
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{
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struct qed_ooo_archipelago *p_archipelago;
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struct qed_ooo_buffer *p_buffer;
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struct qed_ooo_isle *p_isle;
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u32 i;
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for (i = 0; i < p_ooo_info->max_num_archipelagos; i++) {
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p_archipelago = &(p_ooo_info->p_archipelagos_mem[i]);
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while (!list_empty(&p_archipelago->isles_list)) {
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p_isle = list_first_entry(&p_archipelago->isles_list,
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struct qed_ooo_isle,
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list_entry);
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list_del(&p_isle->list_entry);
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while (!list_empty(&p_isle->buffers_list)) {
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p_buffer =
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list_first_entry(&p_isle->buffers_list,
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struct qed_ooo_buffer,
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list_entry);
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if (!p_buffer)
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break;
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list_move_tail(&p_buffer->list_entry,
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&p_ooo_info->free_buffers_list);
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}
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list_add_tail(&p_isle->list_entry,
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&p_ooo_info->free_isles_list);
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}
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}
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if (!list_empty(&p_ooo_info->ready_buffers_list))
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list_splice_tail_init(&p_ooo_info->ready_buffers_list,
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&p_ooo_info->free_buffers_list);
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}
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void qed_ooo_setup(struct qed_hwfn *p_hwfn)
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{
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qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
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memset(p_hwfn->p_ooo_info->ooo_history.p_cqes, 0,
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p_hwfn->p_ooo_info->ooo_history.num_of_cqes *
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sizeof(struct ooo_opaque));
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p_hwfn->p_ooo_info->ooo_history.head_idx = 0;
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}
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void qed_ooo_free(struct qed_hwfn *p_hwfn)
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{
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struct qed_ooo_info *p_ooo_info = p_hwfn->p_ooo_info;
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struct qed_ooo_buffer *p_buffer;
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if (!p_ooo_info)
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return;
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qed_ooo_release_all_isles(p_hwfn, p_ooo_info);
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while (!list_empty(&p_ooo_info->free_buffers_list)) {
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p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
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struct qed_ooo_buffer, list_entry);
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if (!p_buffer)
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break;
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list_del(&p_buffer->list_entry);
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dma_free_coherent(&p_hwfn->cdev->pdev->dev,
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p_buffer->rx_buffer_size,
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p_buffer->rx_buffer_virt_addr,
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p_buffer->rx_buffer_phys_addr);
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kfree(p_buffer);
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}
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kfree(p_ooo_info->p_isles_mem);
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kfree(p_ooo_info->p_archipelagos_mem);
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kfree(p_ooo_info->ooo_history.p_cqes);
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kfree(p_ooo_info);
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p_hwfn->p_ooo_info = NULL;
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}
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void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info,
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struct qed_ooo_buffer *p_buffer)
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{
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list_add_tail(&p_buffer->list_entry, &p_ooo_info->free_buffers_list);
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}
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struct qed_ooo_buffer *qed_ooo_get_free_buffer(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info)
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{
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struct qed_ooo_buffer *p_buffer = NULL;
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if (!list_empty(&p_ooo_info->free_buffers_list)) {
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p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
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struct qed_ooo_buffer, list_entry);
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list_del(&p_buffer->list_entry);
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}
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return p_buffer;
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}
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void qed_ooo_put_ready_buffer(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info,
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struct qed_ooo_buffer *p_buffer, u8 on_tail)
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{
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if (on_tail)
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list_add_tail(&p_buffer->list_entry,
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&p_ooo_info->ready_buffers_list);
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else
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list_add(&p_buffer->list_entry,
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&p_ooo_info->ready_buffers_list);
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}
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struct qed_ooo_buffer *qed_ooo_get_ready_buffer(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info)
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{
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struct qed_ooo_buffer *p_buffer = NULL;
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if (!list_empty(&p_ooo_info->ready_buffers_list)) {
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p_buffer = list_first_entry(&p_ooo_info->ready_buffers_list,
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struct qed_ooo_buffer, list_entry);
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list_del(&p_buffer->list_entry);
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}
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return p_buffer;
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}
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void qed_ooo_delete_isles(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info,
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u32 cid, u8 drop_isle, u8 drop_size)
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{
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struct qed_ooo_isle *p_isle = NULL;
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u8 isle_idx;
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for (isle_idx = 0; isle_idx < drop_size; isle_idx++) {
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p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, drop_isle);
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if (!p_isle) {
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DP_NOTICE(p_hwfn,
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"Isle %d is not found(cid %d)\n",
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drop_isle, cid);
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return;
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}
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if (list_empty(&p_isle->buffers_list))
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DP_NOTICE(p_hwfn,
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"Isle %d is empty(cid %d)\n", drop_isle, cid);
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else
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list_splice_tail_init(&p_isle->buffers_list,
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&p_ooo_info->free_buffers_list);
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list_del(&p_isle->list_entry);
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p_ooo_info->cur_isles_number--;
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list_add(&p_isle->list_entry, &p_ooo_info->free_isles_list);
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}
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}
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void qed_ooo_add_new_isle(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info,
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u32 cid, u8 ooo_isle,
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struct qed_ooo_buffer *p_buffer)
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{
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struct qed_ooo_archipelago *p_archipelago = NULL;
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struct qed_ooo_isle *p_prev_isle = NULL;
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struct qed_ooo_isle *p_isle = NULL;
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if (ooo_isle > 1) {
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p_prev_isle = qed_ooo_seek_isle(p_hwfn,
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p_ooo_info, cid, ooo_isle - 1);
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if (!p_prev_isle) {
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DP_NOTICE(p_hwfn,
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"Isle %d is not found(cid %d)\n",
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ooo_isle - 1, cid);
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return;
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}
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}
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p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
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if (!p_archipelago && (ooo_isle != 1)) {
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DP_NOTICE(p_hwfn,
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"Connection %d is not found in OOO list\n", cid);
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return;
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}
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if (!list_empty(&p_ooo_info->free_isles_list)) {
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p_isle = list_first_entry(&p_ooo_info->free_isles_list,
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struct qed_ooo_isle, list_entry);
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list_del(&p_isle->list_entry);
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if (!list_empty(&p_isle->buffers_list)) {
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DP_NOTICE(p_hwfn, "Free isle is not empty\n");
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INIT_LIST_HEAD(&p_isle->buffers_list);
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}
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} else {
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DP_NOTICE(p_hwfn, "No more free isles\n");
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return;
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}
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if (!p_archipelago) {
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u32 idx = (cid & 0xffff) - p_ooo_info->cid_base;
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p_archipelago = &p_ooo_info->p_archipelagos_mem[idx];
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}
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list_add(&p_buffer->list_entry, &p_isle->buffers_list);
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p_ooo_info->cur_isles_number++;
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p_ooo_info->gen_isles_number++;
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if (p_ooo_info->cur_isles_number > p_ooo_info->max_isles_number)
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p_ooo_info->max_isles_number = p_ooo_info->cur_isles_number;
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if (!p_prev_isle)
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list_add(&p_isle->list_entry, &p_archipelago->isles_list);
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else
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list_add(&p_isle->list_entry, &p_prev_isle->list_entry);
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}
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void qed_ooo_add_new_buffer(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info,
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u32 cid,
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u8 ooo_isle,
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struct qed_ooo_buffer *p_buffer, u8 buffer_side)
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{
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struct qed_ooo_isle *p_isle = NULL;
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p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, ooo_isle);
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if (!p_isle) {
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DP_NOTICE(p_hwfn,
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"Isle %d is not found(cid %d)\n", ooo_isle, cid);
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return;
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}
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if (buffer_side == QED_OOO_LEFT_BUF)
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list_add(&p_buffer->list_entry, &p_isle->buffers_list);
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else
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list_add_tail(&p_buffer->list_entry, &p_isle->buffers_list);
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}
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void qed_ooo_join_isles(struct qed_hwfn *p_hwfn,
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struct qed_ooo_info *p_ooo_info, u32 cid, u8 left_isle)
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{
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struct qed_ooo_isle *p_right_isle = NULL;
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struct qed_ooo_isle *p_left_isle = NULL;
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p_right_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
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left_isle + 1);
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if (!p_right_isle) {
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DP_NOTICE(p_hwfn,
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"Right isle %d is not found(cid %d)\n",
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left_isle + 1, cid);
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return;
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}
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list_del(&p_right_isle->list_entry);
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p_ooo_info->cur_isles_number--;
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if (left_isle) {
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p_left_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
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left_isle);
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if (!p_left_isle) {
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DP_NOTICE(p_hwfn,
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"Left isle %d is not found(cid %d)\n",
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left_isle, cid);
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return;
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}
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list_splice_tail_init(&p_right_isle->buffers_list,
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&p_left_isle->buffers_list);
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} else {
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list_splice_tail_init(&p_right_isle->buffers_list,
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&p_ooo_info->ready_buffers_list);
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}
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list_add_tail(&p_right_isle->list_entry, &p_ooo_info->free_isles_list);
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}
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