82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
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*/
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/*
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* LIBEFC LOCKING
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*
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* The critical sections protected by the efc's spinlock are quite broad and
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* may be improved upon in the future. The libefc code and its locking doesn't
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* influence the I/O path, so excessive locking doesn't impact I/O performance.
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*
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* The strategy is to lock whenever processing a request from user driver. This
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* means that the entry points into the libefc library are protected by efc
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* lock. So all the state machine transitions are protected.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include "efc.h"
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int efcport_init(struct efc *efc)
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{
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u32 rc = 0;
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spin_lock_init(&efc->lock);
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INIT_LIST_HEAD(&efc->vport_list);
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efc->hold_frames = false;
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spin_lock_init(&efc->pend_frames_lock);
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INIT_LIST_HEAD(&efc->pend_frames);
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/* Create Node pool */
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efc->node_pool = mempool_create_kmalloc_pool(EFC_MAX_REMOTE_NODES,
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sizeof(struct efc_node));
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if (!efc->node_pool) {
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efc_log_err(efc, "Can't allocate node pool\n");
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return -ENOMEM;
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}
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efc->node_dma_pool = dma_pool_create("node_dma_pool", &efc->pci->dev,
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NODE_SPARAMS_SIZE, 0, 0);
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if (!efc->node_dma_pool) {
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efc_log_err(efc, "Can't allocate node dma pool\n");
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mempool_destroy(efc->node_pool);
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return -ENOMEM;
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}
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efc->els_io_pool = mempool_create_kmalloc_pool(EFC_ELS_IO_POOL_SZ,
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sizeof(struct efc_els_io_req));
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if (!efc->els_io_pool) {
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efc_log_err(efc, "Can't allocate els io pool\n");
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return -ENOMEM;
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}
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return rc;
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}
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static void
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efc_purge_pending(struct efc *efc)
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{
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struct efc_hw_sequence *frame, *next;
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unsigned long flags = 0;
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spin_lock_irqsave(&efc->pend_frames_lock, flags);
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list_for_each_entry_safe(frame, next, &efc->pend_frames, list_entry) {
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list_del(&frame->list_entry);
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efc->tt.hw_seq_free(efc, frame);
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}
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spin_unlock_irqrestore(&efc->pend_frames_lock, flags);
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}
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void efcport_destroy(struct efc *efc)
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{
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efc_purge_pending(efc);
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mempool_destroy(efc->els_io_pool);
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mempool_destroy(efc->node_pool);
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dma_pool_destroy(efc->node_dma_pool);
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}
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