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142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
// SPDX-License-Identifier: BSD-2-Clause-Views
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/*
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* Copyright 2019-2021, The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation
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* are those of the authors and should not be interpreted as representing
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* official policies, either expressed or implied, of The Regents of the
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* University of California.
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*/
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#include "mqnic.h"
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struct mqnic_sched_block *mqnic_create_sched_block(struct mqnic_if *interface,
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int index, struct mqnic_reg_block *block_rb)
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{
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struct device *dev = interface->dev;
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struct mqnic_sched_block *block;
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struct mqnic_reg_block *rb;
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u32 offset;
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int ret = 0;
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block = kzalloc(sizeof(*block), GFP_KERNEL);
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if (!block)
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return ERR_PTR(-ENOMEM);
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block->dev = dev;
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block->interface = interface;
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block->index = index;
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block->block_rb = block_rb;
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offset = ioread32(block_rb->regs + MQNIC_RB_SCHED_BLOCK_REG_OFFSET);
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block->rb_list = mqnic_enumerate_reg_block_list(interface->hw_addr, offset, interface->hw_regs_size - offset);
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if (!block->rb_list) {
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ret = -EIO;
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dev_err(dev, "Failed to enumerate blocks");
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goto fail;
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}
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dev_info(dev, "Scheduler block-level register blocks:");
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for (rb = block->rb_list; rb->regs; rb++)
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dev_info(dev, " type 0x%08x (v %d.%d.%d.%d)", rb->type, rb->version >> 24,
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(rb->version >> 16) & 0xff, (rb->version >> 8) & 0xff, rb->version & 0xff);
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block->sched_count = 0;
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for (rb = block->rb_list; rb->regs; rb++) {
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if (rb->type == MQNIC_RB_SCHED_RR_TYPE && rb->version == MQNIC_RB_SCHED_RR_VER) {
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struct mqnic_sched *sched = mqnic_create_scheduler(block,
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block->sched_count, rb);
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if (IS_ERR_OR_NULL(sched)) {
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ret = PTR_ERR(sched);
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goto fail;
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}
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block->sched[block->sched_count] = sched;
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block->sched_count++;
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}
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}
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dev_info(dev, "Scheduler count: %d", block->sched_count);
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mqnic_deactivate_sched_block(block);
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return block;
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fail:
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mqnic_destroy_sched_block(block);
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return ERR_PTR(ret);
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}
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void mqnic_destroy_sched_block(struct mqnic_sched_block *block)
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{
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int k;
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mqnic_deactivate_sched_block(block);
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for (k = 0; k < ARRAY_SIZE(block->sched); k++) {
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if (block->sched[k]) {
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mqnic_destroy_scheduler(block->sched[k]);
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block->sched[k] = NULL;
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}
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}
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if (block->rb_list)
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mqnic_free_reg_block_list(block->rb_list);
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kfree(block);
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}
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int mqnic_activate_sched_block(struct mqnic_sched_block *block)
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{
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int k;
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// enable schedulers
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for (k = 0; k < ARRAY_SIZE(block->sched); k++)
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if (block->sched[k])
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mqnic_scheduler_enable(block->sched[k]);
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return 0;
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}
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EXPORT_SYMBOL(mqnic_activate_sched_block);
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void mqnic_deactivate_sched_block(struct mqnic_sched_block *block)
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{
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int k;
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// disable schedulers
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for (k = 0; k < ARRAY_SIZE(block->sched); k++)
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if (block->sched[k])
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mqnic_scheduler_disable(block->sched[k]);
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}
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EXPORT_SYMBOL(mqnic_deactivate_sched_block);
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