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101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
// SPDX-License-Identifier: BSD-2-Clause-Views
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/*
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* Copyright 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 *mqnic_create_scheduler(struct mqnic_sched_block *block,
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int index, struct mqnic_reg_block *rb)
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{
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struct device *dev = block->dev;
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struct mqnic_sched *sched;
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sched = kzalloc(sizeof(*sched), GFP_KERNEL);
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if (!sched)
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return ERR_PTR(-ENOMEM);
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sched->dev = dev;
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sched->interface = block->interface;
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sched->sched_block = block;
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sched->index = index;
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sched->rb = rb;
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sched->type = rb->type;
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sched->offset = ioread32(rb->regs + MQNIC_RB_SCHED_RR_REG_OFFSET);
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sched->channel_count = ioread32(rb->regs + MQNIC_RB_SCHED_RR_REG_CH_COUNT);
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sched->channel_stride = ioread32(rb->regs + MQNIC_RB_SCHED_RR_REG_CH_STRIDE);
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sched->hw_addr = block->interface->hw_addr + sched->offset;
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dev_info(dev, "Scheduler type: 0x%08x", sched->type);
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dev_info(dev, "Scheduler offset: 0x%08x", sched->offset);
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dev_info(dev, "Scheduler channel count: %d", sched->channel_count);
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dev_info(dev, "Scheduler channel stride: 0x%08x", sched->channel_stride);
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mqnic_scheduler_disable(sched);
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return sched;
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}
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void mqnic_destroy_scheduler(struct mqnic_sched *sched)
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{
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mqnic_scheduler_disable(sched);
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kfree(sched);
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}
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int mqnic_scheduler_enable(struct mqnic_sched *sched)
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{
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int k;
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// enable scheduler
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iowrite32(1, sched->rb->regs + MQNIC_RB_SCHED_RR_REG_CTRL);
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// enable queues
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for (k = 0; k < sched->channel_count; k++)
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iowrite32(3, sched->hw_addr + k * sched->channel_stride);
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return 0;
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}
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EXPORT_SYMBOL(mqnic_scheduler_enable);
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void mqnic_scheduler_disable(struct mqnic_sched *sched)
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{
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// disable scheduler
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iowrite32(0, sched->rb->regs + MQNIC_RB_SCHED_RR_REG_CTRL);
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}
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EXPORT_SYMBOL(mqnic_scheduler_disable);
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