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