mirror of https://github.com/F-Stack/f-stack.git
118 lines
4.0 KiB
C
118 lines
4.0 KiB
C
/*-
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* BSD LICENSE
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*
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* Copyright 2013-2015 Freescale Semiconductor Inc.
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* Copyright 2017 NXP.
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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 are met:
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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the above-listed copyright holders nor the
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* names of any contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* GPL LICENSE SUMMARY
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") as published by the Free Software
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* Foundation, either version 2 of that License or (at your option) any
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* later version.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <fsl_mc_sys.h>
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#include <fsl_mc_cmd.h>
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#include <rte_spinlock.h>
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/** User space framework uses MC Portal in shared mode. Following change
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* introduces lock in MC FLIB
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*/
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/**
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* A static spinlock initializer.
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*/
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static rte_spinlock_t mc_portal_lock = RTE_SPINLOCK_INITIALIZER;
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static int mc_status_to_error(enum mc_cmd_status status)
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{
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switch (status) {
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case MC_CMD_STATUS_OK:
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return 0;
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case MC_CMD_STATUS_AUTH_ERR:
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return -EACCES; /* Token error */
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case MC_CMD_STATUS_NO_PRIVILEGE:
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return -EPERM; /* Permission denied */
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case MC_CMD_STATUS_DMA_ERR:
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return -EIO; /* Input/Output error */
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case MC_CMD_STATUS_CONFIG_ERR:
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return -EINVAL; /* Device not configured */
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case MC_CMD_STATUS_TIMEOUT:
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return -ETIMEDOUT; /* Operation timed out */
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case MC_CMD_STATUS_NO_RESOURCE:
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return -ENAVAIL; /* Resource temporarily unavailable */
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case MC_CMD_STATUS_NO_MEMORY:
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return -ENOMEM; /* Cannot allocate memory */
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case MC_CMD_STATUS_BUSY:
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return -EBUSY; /* Device busy */
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case MC_CMD_STATUS_UNSUPPORTED_OP:
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return -ENOTSUP; /* Operation not supported by device */
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case MC_CMD_STATUS_INVALID_STATE:
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return -ENODEV; /* Invalid device state */
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default:
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break;
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}
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/* Not expected to reach here */
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return -EINVAL;
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}
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int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd)
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{
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enum mc_cmd_status status;
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uint64_t response;
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if (!mc_io || !mc_io->regs)
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return -EACCES;
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/* --- Call lock function here in case portal is shared --- */
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rte_spinlock_lock(&mc_portal_lock);
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mc_write_command(mc_io->regs, cmd);
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/* Spin until status changes */
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do {
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response = ioread64(mc_io->regs);
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status = mc_cmd_read_status((struct mc_command *)&response);
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/* --- Call wait function here to prevent blocking ---
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* Change the loop condition accordingly to exit on timeout.
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*/
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} while (status == MC_CMD_STATUS_READY);
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/* Read the response back into the command buffer */
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mc_read_response(mc_io->regs, cmd);
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/* --- Call unlock function here in case portal is shared --- */
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rte_spinlock_unlock(&mc_portal_lock);
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return mc_status_to_error(status);
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}
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