cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/wireless/intel/iwlwifi/iwl-trans.c

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2015 Intel Mobile Communications GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2015 Intel Mobile Communications GmbH
 * All rights reserved.
 *
 * 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 Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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
 * OWNER 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 <linux/kernel.h>
#include <linux/bsearch.h>

#include "iwl-trans.h"
#include "iwl-drv.h"
#include "iwl-fh.h"


struct iwl_trans *iwl_trans_alloc(unsigned int priv_size, struct device *dev, const struct iwl_cfg *cfg, const struct iwl_trans_ops *ops, size_t dev_cmd_headroom) { struct iwl_trans *trans; #ifdef CONFIG_LOCKDEP static struct lock_class_key __key; #endif trans = devm_kzalloc(dev, sizeof(*trans) + priv_size, GFP_KERNEL); if (!trans) return NULL; #ifdef CONFIG_LOCKDEP lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map", &__key, 0); #endif trans->dev = dev; trans->cfg = cfg; trans->ops = ops; trans->dev_cmd_headroom = dev_cmd_headroom; trans->num_rx_queues = 1; snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name), "iwl_cmd_pool:%s", dev_name(trans->dev)); trans->dev_cmd_pool = kmem_cache_create(trans->dev_cmd_pool_name, sizeof(struct iwl_device_cmd) + trans->dev_cmd_headroom, sizeof(void *), SLAB_HWCACHE_ALIGN, NULL); if (!trans->dev_cmd_pool) return NULL; return trans; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg18397.34%266.67%
Sharon Dvir52.66%133.33%
Total188100.00%3100.00%


void iwl_trans_free(struct iwl_trans *trans) { kmem_cache_destroy(trans->dev_cmd_pool); }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg17100.00%1100.00%
Total17100.00%1100.00%


int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) { int ret; if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) && test_bit(STATUS_RFKILL, &trans->status))) return -ERFKILL; if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) return -EIO; if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) { IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); return -EIO; } if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) && !(cmd->flags & CMD_ASYNC))) return -EINVAL; if (!(cmd->flags & CMD_ASYNC)) lock_map_acquire_read(&trans->sync_cmd_lockdep_map); if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id)) cmd->id = DEF_ID(cmd->id); ret = trans->ops->send_cmd(trans, cmd); if (!(cmd->flags & CMD_ASYNC)) lock_map_release(&trans->sync_cmd_lockdep_map); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Emmanuel Grumbach17587.50%150.00%
Sara Sharon2512.50%150.00%
Total200100.00%2100.00%

IWL_EXPORT_SYMBOL(iwl_trans_send_cmd); /* Comparator for struct iwl_hcmd_names. * Used in the binary search over a list of host commands. * * @key: command_id that we're looking for. * @elt: struct iwl_hcmd_names candidate for match. * * @return 0 iff equal. */
static int iwl_hcmd_names_cmp(const void *key, const void *elt) { const struct iwl_hcmd_names *name = elt; u8 cmd1 = *(u8 *)key; u8 cmd2 = name->cmd_id; return (cmd1 - cmd2); }

Contributors

PersonTokensPropCommitsCommitProp
Sharon Dvir48100.00%1100.00%
Total48100.00%1100.00%


const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id) { u8 grp, cmd; struct iwl_hcmd_names *ret; const struct iwl_hcmd_arr *arr; size_t size = sizeof(struct iwl_hcmd_names); grp = iwl_cmd_groupid(id); cmd = iwl_cmd_opcode(id); if (!trans->command_groups || grp >= trans->command_groups_size || !trans->command_groups[grp].arr) return "UNKNOWN"; arr = &trans->command_groups[grp]; ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp); if (!ret) return "UNKNOWN"; return ret->cmd_name; }

Contributors

PersonTokensPropCommitsCommitProp
Sharon Dvir123100.00%1100.00%
Total123100.00%1100.00%

IWL_EXPORT_SYMBOL(iwl_get_cmd_string);
int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans) { int i, j; const struct iwl_hcmd_arr *arr; for (i = 0; i < trans->command_groups_size; i++) { arr = &trans->command_groups[i]; if (!arr->arr) continue; for (j = 0; j < arr->size - 1; j++) if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id) return -1; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Sharon Dvir103100.00%1100.00%
Total103100.00%1100.00%

IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted);

Overall Contributors

PersonTokensPropCommitsCommitProp
Sharon Dvir29441.35%225.00%
Johannes Berg20628.97%225.00%
Emmanuel Grumbach18325.74%225.00%
Sara Sharon283.94%225.00%
Total711100.00%8100.00%
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