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|
/*
* Copyright 2011-2012 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.
*/
/*
* Offline Parsing / Host Command port driver for FSL QorIQ FMan.
* Validates device-tree configuration and sets up the offline ports.
*/
#define pr_fmt(fmt) \
KBUILD_MODNAME ": %s:%hu:%s() " fmt, \
KBUILD_BASENAME".c", __LINE__, __func__
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include "offline_port.h"
#include "dpaa_eth.h"
#include "dpaa_eth_common.h"
#define OH_MOD_DESCRIPTION "FSL FMan Offline Parsing port driver"
/*
* Manip extra space and data alignment for fragmentation
*/
#define FRAG_MANIP_SPACE 128
#define FRAG_DATA_ALIGN 64
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Bogdan Hamciuc <bogdan.hamciuc@freescale.com>");
MODULE_DESCRIPTION(OH_MOD_DESCRIPTION);
static const struct of_device_id oh_port_match_table[] = {
{
.compatible = "fsl,dpa-oh"
},
{
.compatible = "fsl,dpa-oh-shared"
},
{}
};
MODULE_DEVICE_TABLE(of, oh_port_match_table);
static int oh_port_remove(struct platform_device *_of_dev);
static int oh_port_probe(struct platform_device *_of_dev);
static struct platform_driver oh_port_driver = {
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = oh_port_match_table,
.owner = THIS_MODULE,
},
.probe = oh_port_probe,
.remove = oh_port_remove
};
/* Allocation code for the OH port's PCD frame queues */
static int __cold oh_alloc_pcd_fqids(struct device *dev,
uint32_t num,
uint8_t alignment,
uint32_t *base_fqid)
{
dev_crit(dev, "callback not implemented!\n");
BUG();
return 0;
}
static int __cold oh_free_pcd_fqids(struct device *dev, uint32_t base_fqid)
{
dev_crit(dev, "callback not implemented!\n");
BUG();
return 0;
}
static void oh_set_buffer_layout(struct fm_port *port,
struct dpa_buffer_layout_s *layout)
{
struct fm_port_params params;
layout->priv_data_size = DPA_TX_PRIV_DATA_SIZE;
layout->parse_results = true;
layout->hash_results = true;
layout->time_stamp = false;
fm_port_get_buff_layout_ext_params(port, ¶ms);
layout->manip_extra_space = params.manip_extra_space;
layout->data_align = params.data_align;
}
static int
oh_port_probe(struct platform_device *_of_dev)
{
struct device *dpa_oh_dev;
struct device_node *dpa_oh_node;
int lenp, _errno = 0, fq_idx, n_size, i;
const phandle *oh_port_handle, *bpool_handle;
struct platform_device *oh_of_dev;
struct device_node *oh_node, *bpool_node = NULL, *root_node;
struct device *oh_dev;
struct dpa_oh_config_s *oh_config = NULL;
uint32_t *oh_all_queues;
uint32_t queues_count;
uint32_t crt_fqid_base;
uint32_t crt_fq_count;
bool frag_enabled = false;
struct fm_port_params oh_port_tx_params;
struct fm_port_pcd_param oh_port_pcd_params;
struct dpa_buffer_layout_s buf_layout;
/* True if the current partition owns the OH port. */
bool init_oh_port;
const struct of_device_id *match;
uint32_t crt_ext_pools_count, ext_pool_size;
const unsigned int *port_id;
const uint32_t *bpool_cfg;
const uint32_t *bpid;
memset(&oh_port_tx_params, 0, sizeof(oh_port_tx_params));
dpa_oh_dev = &_of_dev->dev;
dpa_oh_node = dpa_oh_dev->of_node;
BUG_ON(dpa_oh_node == NULL);
match = of_match_device(oh_port_match_table, dpa_oh_dev);
if (!match)
return -EINVAL;
dev_dbg(dpa_oh_dev, "Probing OH port...\n");
/*
* Find the referenced OH node
*/
oh_port_handle = of_get_property(dpa_oh_node,
"fsl,fman-oh-port", &lenp);
if (oh_port_handle == NULL) {
dev_err(dpa_oh_dev, "No OH port handle found in node %s\n",
dpa_oh_node->full_name);
return -EINVAL;
}
BUG_ON(lenp % sizeof(*oh_port_handle));
if (lenp != sizeof(*oh_port_handle)) {
dev_err(dpa_oh_dev, "Found %lu OH port bindings in node %s,"
" only 1 phandle is allowed.\n",
(unsigned long int)(lenp / sizeof(*oh_port_handle)),
dpa_oh_node->full_name);
return -EINVAL;
}
/* Read configuration for the OH port */
oh_node = of_find_node_by_phandle(*oh_port_handle);
if (oh_node == NULL) {
dev_err(dpa_oh_dev, "Can't find OH node referenced from "
"node %s\n", dpa_oh_node->full_name);
return -EINVAL;
}
dev_info(dpa_oh_dev, "Found OH node handle compatible with %s.\n",
match->compatible);
port_id = of_get_property(oh_node, "cell-index", &lenp);
if (port_id == NULL) {
dev_err(dpa_oh_dev, "No port id found in node %s\n",
dpa_oh_node->full_name);
_errno = -EINVAL;
goto return_kfree;
}
BUG_ON(lenp % sizeof(*port_id));
oh_of_dev = of_find_device_by_node(oh_node);
BUG_ON(oh_of_dev == NULL);
oh_dev = &oh_of_dev->dev;
/*
* The OH port must be initialized exactly once.
* The following scenarios are of interest:
* - the node is Linux-private (will always initialize it);
* - the node is shared between two Linux partitions
* (only one of them will initialize it);
* - the node is shared between a Linux and a LWE partition
* (Linux will initialize it) - "fsl,dpa-oh-shared"
*/
/* Check if the current partition owns the OH port
* and ought to initialize it. It may be the case that we leave this
* to another (also Linux) partition. */
init_oh_port = strcmp(match->compatible, "fsl,dpa-oh-shared");
/* If we aren't the "owner" of the OH node, we're done here. */
if (!init_oh_port) {
dev_dbg(dpa_oh_dev, "Not owning the shared OH port %s, "
"will not initialize it.\n", oh_node->full_name);
of_node_put(oh_node);
return 0;
}
/* Allocate OH dev private data */
oh_config = devm_kzalloc(dpa_oh_dev, sizeof(*oh_config), GFP_KERNEL);
if (oh_config == NULL) {
dev_err(dpa_oh_dev, "Can't allocate private data for "
"OH node %s referenced from node %s!\n",
oh_node->full_name, dpa_oh_node->full_name);
_errno = -ENOMEM;
goto return_kfree;
}
/*
* Read FQ ids/nums for the DPA OH node
*/
oh_all_queues = (uint32_t *)of_get_property(dpa_oh_node,
"fsl,qman-frame-queues-oh", &lenp);
if (oh_all_queues == NULL) {
dev_err(dpa_oh_dev, "No frame queues have been "
"defined for OH node %s referenced from node %s\n",
oh_node->full_name, dpa_oh_node->full_name);
_errno = -EINVAL;
goto return_kfree;
}
/* Check that the OH error and default FQs are there */
BUG_ON(lenp % (2 * sizeof(*oh_all_queues)));
queues_count = lenp / (2 * sizeof(*oh_all_queues));
if (queues_count != 2) {
dev_err(dpa_oh_dev, "Error and Default queues must be "
"defined for OH node %s referenced from node %s\n",
oh_node->full_name, dpa_oh_node->full_name);
_errno = -EINVAL;
goto return_kfree;
}
/* Read the FQIDs defined for this OH port */
dev_dbg(dpa_oh_dev, "Reading %d queues...\n", queues_count);
fq_idx = 0;
/* Error FQID - must be present */
crt_fqid_base = oh_all_queues[fq_idx++];
crt_fq_count = oh_all_queues[fq_idx++];
if (crt_fq_count != 1) {
dev_err(dpa_oh_dev, "Only 1 Error FQ allowed in OH node %s "
"referenced from node %s (read: %d FQIDs).\n",
oh_node->full_name, dpa_oh_node->full_name,
crt_fq_count);
_errno = -EINVAL;
goto return_kfree;
}
oh_config->error_fqid = crt_fqid_base;
dev_dbg(dpa_oh_dev, "Read Error FQID 0x%x for OH port %s.\n",
oh_config->error_fqid, oh_node->full_name);
/* Default FQID - must be present */
crt_fqid_base = oh_all_queues[fq_idx++];
crt_fq_count = oh_all_queues[fq_idx++];
if (crt_fq_count != 1) {
dev_err(dpa_oh_dev, "Only 1 Default FQ allowed "
"in OH node %s referenced from %s (read: %d FQIDs).\n",
oh_node->full_name, dpa_oh_node->full_name,
crt_fq_count);
_errno = -EINVAL;
goto return_kfree;
}
oh_config->default_fqid = crt_fqid_base;
dev_dbg(dpa_oh_dev, "Read Default FQID 0x%x for OH port %s.\n",
oh_config->default_fqid, oh_node->full_name);
/* Get a handle to the fm_port so we can set
* its configuration params */
oh_config->oh_port = fm_port_bind(oh_dev);
if (oh_config->oh_port == NULL) {
dev_err(dpa_oh_dev, "NULL drvdata from fm port dev %s!\n",
oh_node->full_name);
_errno = -EINVAL;
goto return_kfree;
}
oh_set_buffer_layout(oh_config->oh_port, &buf_layout);
bpool_handle = of_get_property(dpa_oh_node,
"fsl,bman-buffer-pools", &lenp);
if (bpool_handle == NULL) {
dev_info(dpa_oh_dev, "OH port %s has no buffer pool. Fragmentation will not be enabled\n",
oh_node->full_name);
goto init_port;
}
/* used for reading ext_pool_size*/
root_node = of_find_node_by_path("/");
if (root_node == NULL) {
dev_err(dpa_oh_dev, "of_find_node_by_path(/) failed\n");
_errno = -EINVAL;
goto return_kfree;
}
n_size = of_n_size_cells(root_node);
of_node_put(root_node);
crt_ext_pools_count = lenp / sizeof(phandle);
dev_dbg(dpa_oh_dev, "OH port number of pools = %u\n",
crt_ext_pools_count);
oh_port_tx_params.num_pools = crt_ext_pools_count;
for (i = 0; i < crt_ext_pools_count; i++) {
bpool_node = of_find_node_by_phandle(bpool_handle[i]);
if (bpool_node == NULL) {
dev_err(dpa_oh_dev, "Invalid Buffer pool node\n");
_errno = -EINVAL;
goto return_kfree;
}
bpid = of_get_property(bpool_node, "fsl,bpid", &lenp);
if ((bpid == NULL) || (lenp != sizeof(*bpid))) {
dev_err(dpa_oh_dev, "Invalid Buffer pool Id\n");
_errno = -EINVAL;
goto return_kfree;
}
oh_port_tx_params.pool_param[i].id = *bpid;
dev_dbg(dpa_oh_dev, "OH port bpool id = %u\n", *bpid);
bpool_cfg = of_get_property(bpool_node,
"fsl,bpool-ethernet-cfg", &lenp);
if (bpool_cfg == NULL) {
dev_err(dpa_oh_dev, "Invalid Buffer pool config params\n");
_errno = -EINVAL;
goto return_kfree;
}
of_read_number(bpool_cfg, n_size);
ext_pool_size = of_read_number(bpool_cfg + n_size, n_size);
oh_port_tx_params.pool_param[i].size = ext_pool_size;
dev_dbg(dpa_oh_dev, "OH port bpool size = %u\n",
ext_pool_size);
of_node_put(bpool_node);
}
if (buf_layout.data_align != FRAG_DATA_ALIGN ||
buf_layout.manip_extra_space != FRAG_MANIP_SPACE)
goto init_port;
frag_enabled = true;
dev_info(dpa_oh_dev, "IP Fragmentation enabled for OH port %d",
*port_id);
init_port:
of_node_put(oh_node);
/* Set Tx params */
dpaa_eth_init_port(tx, oh_config->oh_port, oh_port_tx_params,
oh_config->error_fqid, oh_config->default_fqid, (&buf_layout),
frag_enabled);
/* Set PCD params */
oh_port_pcd_params.cba = oh_alloc_pcd_fqids;
oh_port_pcd_params.cbf = oh_free_pcd_fqids;
oh_port_pcd_params.dev = dpa_oh_dev;
fm_port_pcd_bind(oh_config->oh_port, &oh_port_pcd_params);
dev_set_drvdata(dpa_oh_dev, oh_config);
/* Enable the OH port */
fm_port_enable(oh_config->oh_port);
dev_info(dpa_oh_dev, "OH port %s enabled.\n", oh_node->full_name);
return 0;
return_kfree:
if (bpool_node)
of_node_put(bpool_node);
if (oh_node)
of_node_put(oh_node);
devm_kfree(dpa_oh_dev, oh_config);
return _errno;
}
static int __cold oh_port_remove(struct platform_device *_of_dev)
{
int _errno = 0;
struct dpa_oh_config_s *oh_config;
pr_info("Removing OH port...\n");
oh_config = dev_get_drvdata(&_of_dev->dev);
if (oh_config == NULL) {
pr_err(KBUILD_MODNAME
": %s:%hu:%s(): No OH config in device private data!\n",
KBUILD_BASENAME".c", __LINE__, __func__);
_errno = -ENODEV;
goto return_error;
}
if (oh_config->oh_port == NULL) {
pr_err(KBUILD_MODNAME
": %s:%hu:%s(): No fm port in device private data!\n",
KBUILD_BASENAME".c", __LINE__, __func__);
_errno = -EINVAL;
goto return_error;
}
fm_port_disable(oh_config->oh_port);
devm_kfree(&_of_dev->dev, oh_config);
dev_set_drvdata(&_of_dev->dev, NULL);
return_error:
return _errno;
}
static int __init __cold oh_port_load(void)
{
int _errno;
printk(KERN_INFO KBUILD_MODNAME ": " OH_MOD_DESCRIPTION " (" VERSION ")\n");
_errno = platform_driver_register(&oh_port_driver);
if (_errno < 0) {
pr_err(KBUILD_MODNAME
": %s:%hu:%s(): platform_driver_register() = %d\n",
KBUILD_BASENAME".c", __LINE__, __func__, _errno);
}
pr_debug(KBUILD_MODNAME ": %s:%s() ->\n",
KBUILD_BASENAME".c", __func__);
return _errno;
}
module_init(oh_port_load);
static void __exit __cold oh_port_unload(void)
{
pr_debug(KBUILD_MODNAME ": -> %s:%s()\n",
KBUILD_BASENAME".c", __func__);
platform_driver_unregister(&oh_port_driver);
pr_debug(KBUILD_MODNAME ": %s:%s() ->\n",
KBUILD_BASENAME".c", __func__);
}
module_exit(oh_port_unload);
|