224 lines
6.7 KiB
C
224 lines
6.7 KiB
C
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/******************************************************************************
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*
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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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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2015 Intel Mobile Communications GmbH
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* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called COPYING.
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*
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* Contact Information:
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* Intel Linux Wireless <linuxwifi@intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2015 Intel Mobile Communications GmbH
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* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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* All rights reserved.
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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
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* are met:
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/bsearch.h>
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#include "iwl-trans.h"
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#include "iwl-drv.h"
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#include "iwl-fh.h"
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struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
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struct device *dev,
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const struct iwl_cfg *cfg,
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const struct iwl_trans_ops *ops)
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{
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struct iwl_trans *trans;
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#ifdef CONFIG_LOCKDEP
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static struct lock_class_key __key;
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#endif
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trans = devm_kzalloc(dev, sizeof(*trans) + priv_size, GFP_KERNEL);
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if (!trans)
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return NULL;
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#ifdef CONFIG_LOCKDEP
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lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map",
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&__key, 0);
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#endif
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trans->dev = dev;
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trans->cfg = cfg;
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trans->ops = ops;
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trans->num_rx_queues = 1;
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snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
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"iwl_cmd_pool:%s", dev_name(trans->dev));
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trans->dev_cmd_pool =
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kmem_cache_create(trans->dev_cmd_pool_name,
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sizeof(struct iwl_device_cmd),
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sizeof(void *),
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SLAB_HWCACHE_ALIGN,
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NULL);
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if (!trans->dev_cmd_pool)
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return NULL;
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WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);
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return trans;
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}
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void iwl_trans_free(struct iwl_trans *trans)
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{
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kmem_cache_destroy(trans->dev_cmd_pool);
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}
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int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
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{
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int ret;
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if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
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test_bit(STATUS_RFKILL_OPMODE, &trans->status)))
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return -ERFKILL;
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if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
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return -EIO;
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if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
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IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
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return -EIO;
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}
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if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) &&
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!(cmd->flags & CMD_ASYNC)))
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return -EINVAL;
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if (!(cmd->flags & CMD_ASYNC))
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lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
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if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id))
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cmd->id = DEF_ID(cmd->id);
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ret = trans->ops->send_cmd(trans, cmd);
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if (!(cmd->flags & CMD_ASYNC))
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lock_map_release(&trans->sync_cmd_lockdep_map);
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if (WARN_ON((cmd->flags & CMD_WANT_SKB) && !ret && !cmd->resp_pkt))
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return -EIO;
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return ret;
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}
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IWL_EXPORT_SYMBOL(iwl_trans_send_cmd);
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/* Comparator for struct iwl_hcmd_names.
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* Used in the binary search over a list of host commands.
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*
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* @key: command_id that we're looking for.
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* @elt: struct iwl_hcmd_names candidate for match.
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*
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* @return 0 iff equal.
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*/
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static int iwl_hcmd_names_cmp(const void *key, const void *elt)
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{
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const struct iwl_hcmd_names *name = elt;
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u8 cmd1 = *(u8 *)key;
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u8 cmd2 = name->cmd_id;
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return (cmd1 - cmd2);
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}
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const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id)
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{
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u8 grp, cmd;
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struct iwl_hcmd_names *ret;
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const struct iwl_hcmd_arr *arr;
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size_t size = sizeof(struct iwl_hcmd_names);
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grp = iwl_cmd_groupid(id);
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cmd = iwl_cmd_opcode(id);
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if (!trans->command_groups || grp >= trans->command_groups_size ||
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!trans->command_groups[grp].arr)
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return "UNKNOWN";
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arr = &trans->command_groups[grp];
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ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp);
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if (!ret)
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return "UNKNOWN";
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return ret->cmd_name;
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}
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IWL_EXPORT_SYMBOL(iwl_get_cmd_string);
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int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans)
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{
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int i, j;
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const struct iwl_hcmd_arr *arr;
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for (i = 0; i < trans->command_groups_size; i++) {
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arr = &trans->command_groups[i];
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if (!arr->arr)
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continue;
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for (j = 0; j < arr->size - 1; j++)
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if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id)
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return -1;
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}
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return 0;
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}
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IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted);
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void iwl_trans_ref(struct iwl_trans *trans)
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{
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if (trans->ops->ref)
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trans->ops->ref(trans);
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}
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IWL_EXPORT_SYMBOL(iwl_trans_ref);
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void iwl_trans_unref(struct iwl_trans *trans)
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{
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if (trans->ops->unref)
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trans->ops->unref(trans);
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}
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IWL_EXPORT_SYMBOL(iwl_trans_unref);
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