diff options
Diffstat (limited to 'linux/drivers/soc/fsl/qbman/qman_driver.c')
-rw-r--r-- | linux/drivers/soc/fsl/qbman/qman_driver.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/linux/drivers/soc/fsl/qbman/qman_driver.c b/linux/drivers/soc/fsl/qbman/qman_driver.c new file mode 100644 index 00000000..6923504e --- /dev/null +++ b/linux/drivers/soc/fsl/qbman/qman_driver.c @@ -0,0 +1,87 @@ +#include <machine/rtems-bsd-kernel-space.h> + +#include <rtems/bsd/local/opt_dpaa.h> + +/* 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 Freescale Semiconductor nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * 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 Freescale Semiconductor ``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 Freescale Semiconductor 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 "qman_priv.h" + +#include <linux/time.h> + +static int __init early_qman_init(void) +{ + struct device_node *dn; + u32 is_portal_available; + + qman_init(); + + is_portal_available = 0; + for_each_compatible_node(dn, NULL, "fsl,qman-portal") { + if (of_device_is_available(dn)) { + is_portal_available = 1; + break; + } + } + + if (!qman_have_ccsr() && is_portal_available) { + struct qman_fq fq = {.fqid = 1}; + struct qm_mcr_queryfq_np np; + int err, retry = CONFIG_FSL_QMAN_INIT_TIMEOUT; + struct timespec nowts, diffts, startts = current_kernel_time(); + + /* Loop while querying given fqid succeeds or time out */ + while (1) { + err = qman_query_fq_np(&fq, &np); + if (!err) { + /* success, control-plane has configured QMan */ + break; + } else if (err != -ERANGE) { + pr_err("I/O error, continuing anyway\n"); + break; + } + nowts = current_kernel_time(); + diffts = timespec_sub(nowts, startts); + if (diffts.tv_sec > 0) { + if (!retry--) { + pr_err("Time out, control-plane dead?\n"); + break; + } + pr_warn("Polling for the control-plane (%d)\n", + retry); + } + } + } + + qman_resource_init(); + + return 0; +} +subsys_initcall(early_qman_init); |