ath10k: add testmode
Add testmode interface for starting and using UTF firmware which is used to run factory tests. This is implemented by adding new state ATH10K_STATE_UTF and user space can enable this state with ATH10K_TM_CMD_UTF_START command. To go back to normal mode user space can send ATH10K_TM_CMD_UTF_STOP. Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Kalle Valo
382
drivers/net/wireless/ath/ath10k/testmode.c
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382
drivers/net/wireless/ath/ath10k/testmode.c
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/*
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* Copyright (c) 2014 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "testmode.h"
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#include <net/netlink.h>
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#include <linux/firmware.h>
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#include "debug.h"
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#include "wmi.h"
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#include "hif.h"
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#include "hw.h"
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#include "testmode_i.h"
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static const struct nla_policy ath10k_tm_policy[ATH10K_TM_ATTR_MAX + 1] = {
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[ATH10K_TM_ATTR_CMD] = { .type = NLA_U32 },
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[ATH10K_TM_ATTR_DATA] = { .type = NLA_BINARY,
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.len = ATH10K_TM_DATA_MAX_LEN },
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[ATH10K_TM_ATTR_WMI_CMDID] = { .type = NLA_U32 },
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[ATH10K_TM_ATTR_VERSION_MAJOR] = { .type = NLA_U32 },
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[ATH10K_TM_ATTR_VERSION_MINOR] = { .type = NLA_U32 },
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};
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/* Returns true if callee consumes the skb and the skb should be discarded.
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* Returns false if skb is not used. Does not sleep.
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*/
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bool ath10k_tm_event_wmi(struct ath10k *ar, u32 cmd_id, struct sk_buff *skb)
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{
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struct sk_buff *nl_skb;
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bool consumed;
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int ret;
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ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
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"testmode event wmi cmd_id %d skb %p skb->len %d\n",
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cmd_id, skb, skb->len);
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ath10k_dbg_dump(ar, ATH10K_DBG_TESTMODE, NULL, "", skb->data, skb->len);
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spin_lock_bh(&ar->data_lock);
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if (!ar->testmode.utf_monitor) {
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consumed = false;
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goto out;
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}
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/* Only testmode.c should be handling events from utf firmware,
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* otherwise all sort of problems will arise as mac80211 operations
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* are not initialised.
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*/
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consumed = true;
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nl_skb = cfg80211_testmode_alloc_event_skb(ar->hw->wiphy,
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2 * sizeof(u32) + skb->len,
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GFP_ATOMIC);
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if (!nl_skb) {
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ath10k_warn(ar,
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"failed to allocate skb for testmode wmi event\n");
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goto out;
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}
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ret = nla_put_u32(nl_skb, ATH10K_TM_ATTR_CMD, ATH10K_TM_CMD_WMI);
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if (ret) {
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ath10k_warn(ar,
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"failed to to put testmode wmi event cmd attribute: %d\n",
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ret);
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kfree_skb(nl_skb);
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goto out;
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}
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ret = nla_put_u32(nl_skb, ATH10K_TM_ATTR_WMI_CMDID, cmd_id);
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if (ret) {
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ath10k_warn(ar,
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"failed to to put testmode wmi even cmd_id: %d\n",
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ret);
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kfree_skb(nl_skb);
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goto out;
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}
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ret = nla_put(nl_skb, ATH10K_TM_ATTR_DATA, skb->len, skb->data);
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if (ret) {
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ath10k_warn(ar,
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"failed to copy skb to testmode wmi event: %d\n",
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ret);
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kfree_skb(nl_skb);
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goto out;
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}
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cfg80211_testmode_event(nl_skb, GFP_ATOMIC);
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out:
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spin_unlock_bh(&ar->data_lock);
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return consumed;
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}
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static int ath10k_tm_cmd_get_version(struct ath10k *ar, struct nlattr *tb[])
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{
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struct sk_buff *skb;
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int ret;
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ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
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"testmode cmd get version_major %d version_minor %d\n",
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ATH10K_TESTMODE_VERSION_MAJOR,
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ATH10K_TESTMODE_VERSION_MINOR);
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skb = cfg80211_testmode_alloc_reply_skb(ar->hw->wiphy,
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nla_total_size(sizeof(u32)));
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if (!skb)
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return -ENOMEM;
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ret = nla_put_u32(skb, ATH10K_TM_ATTR_VERSION_MAJOR,
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ATH10K_TESTMODE_VERSION_MAJOR);
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if (ret) {
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kfree_skb(skb);
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return ret;
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}
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ret = nla_put_u32(skb, ATH10K_TM_ATTR_VERSION_MINOR,
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ATH10K_TESTMODE_VERSION_MINOR);
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if (ret) {
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kfree_skb(skb);
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return ret;
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}
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return cfg80211_testmode_reply(skb);
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}
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static int ath10k_tm_cmd_utf_start(struct ath10k *ar, struct nlattr *tb[])
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{
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char filename[100];
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int ret;
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ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode cmd utf start\n");
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mutex_lock(&ar->conf_mutex);
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if (ar->state == ATH10K_STATE_UTF) {
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ret = -EALREADY;
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goto err;
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}
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/* start utf only when the driver is not in use */
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if (ar->state != ATH10K_STATE_OFF) {
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ret = -EBUSY;
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goto err;
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}
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if (WARN_ON(ar->testmode.utf != NULL)) {
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/* utf image is already downloaded, it shouldn't be */
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ret = -EEXIST;
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goto err;
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}
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snprintf(filename, sizeof(filename), "%s/%s",
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ar->hw_params.fw.dir, ATH10K_FW_UTF_FILE);
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/* load utf firmware image */
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ret = request_firmware(&ar->testmode.utf, filename, ar->dev);
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if (ret) {
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ath10k_warn(ar, "failed to retrieve utf firmware '%s': %d\n",
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filename, ret);
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goto err;
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}
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spin_lock_bh(&ar->data_lock);
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ar->testmode.utf_monitor = true;
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spin_unlock_bh(&ar->data_lock);
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BUILD_BUG_ON(sizeof(ar->fw_features) !=
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sizeof(ar->testmode.orig_fw_features));
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memcpy(ar->testmode.orig_fw_features, ar->fw_features,
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sizeof(ar->fw_features));
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/* utf.bin firmware image does not advertise firmware features. Do
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* an ugly hack where we force the firmware features so that wmi.c
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* will use the correct WMI interface.
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*/
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memset(ar->fw_features, 0, sizeof(ar->fw_features));
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__set_bit(ATH10K_FW_FEATURE_WMI_10X, ar->fw_features);
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ret = ath10k_hif_power_up(ar);
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if (ret) {
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ath10k_err(ar, "failed to power up hif (testmode): %d\n", ret);
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ar->state = ATH10K_STATE_OFF;
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goto err_fw_features;
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}
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ret = ath10k_core_start(ar, ATH10K_FIRMWARE_MODE_UTF);
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if (ret) {
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ath10k_err(ar, "failed to start core (testmode): %d\n", ret);
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ar->state = ATH10K_STATE_OFF;
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goto err_power_down;
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}
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ar->state = ATH10K_STATE_UTF;
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ath10k_info(ar, "UTF firmware started\n");
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mutex_unlock(&ar->conf_mutex);
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return 0;
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err_power_down:
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ath10k_hif_power_down(ar);
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err_fw_features:
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/* return the original firmware features */
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memcpy(ar->fw_features, ar->testmode.orig_fw_features,
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sizeof(ar->fw_features));
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release_firmware(ar->testmode.utf);
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ar->testmode.utf = NULL;
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err:
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mutex_unlock(&ar->conf_mutex);
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return ret;
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}
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static void __ath10k_tm_cmd_utf_stop(struct ath10k *ar)
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{
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lockdep_assert_held(&ar->conf_mutex);
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ath10k_core_stop(ar);
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ath10k_hif_power_down(ar);
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spin_lock_bh(&ar->data_lock);
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ar->testmode.utf_monitor = false;
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spin_unlock_bh(&ar->data_lock);
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/* return the original firmware features */
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memcpy(ar->fw_features, ar->testmode.orig_fw_features,
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sizeof(ar->fw_features));
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release_firmware(ar->testmode.utf);
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ar->testmode.utf = NULL;
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ar->state = ATH10K_STATE_OFF;
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}
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static int ath10k_tm_cmd_utf_stop(struct ath10k *ar, struct nlattr *tb[])
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{
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int ret;
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ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode cmd utf stop\n");
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mutex_lock(&ar->conf_mutex);
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if (ar->state != ATH10K_STATE_UTF) {
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ret = -ENETDOWN;
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goto out;
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}
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__ath10k_tm_cmd_utf_stop(ar);
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ret = 0;
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ath10k_info(ar, "UTF firmware stopped\n");
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out:
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mutex_unlock(&ar->conf_mutex);
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return ret;
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}
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static int ath10k_tm_cmd_wmi(struct ath10k *ar, struct nlattr *tb[])
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{
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struct sk_buff *skb;
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int ret, buf_len;
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u32 cmd_id;
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void *buf;
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mutex_lock(&ar->conf_mutex);
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if (ar->state != ATH10K_STATE_UTF) {
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ret = -ENETDOWN;
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goto out;
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}
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if (!tb[ATH10K_TM_ATTR_DATA]) {
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ret = -EINVAL;
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goto out;
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}
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if (!tb[ATH10K_TM_ATTR_WMI_CMDID]) {
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ret = -EINVAL;
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goto out;
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}
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buf = nla_data(tb[ATH10K_TM_ATTR_DATA]);
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buf_len = nla_len(tb[ATH10K_TM_ATTR_DATA]);
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cmd_id = nla_get_u32(tb[ATH10K_TM_ATTR_WMI_CMDID]);
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ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
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"testmode cmd wmi cmd_id %d buf %p buf_len %d\n",
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cmd_id, buf, buf_len);
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ath10k_dbg_dump(ar, ATH10K_DBG_TESTMODE, NULL, "", buf, buf_len);
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skb = ath10k_wmi_alloc_skb(ar, buf_len);
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if (!skb) {
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ret = -ENOMEM;
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goto out;
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}
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memcpy(skb->data, buf, buf_len);
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ret = ath10k_wmi_cmd_send(ar, skb, cmd_id);
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if (ret) {
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ath10k_warn(ar, "failed to transmit wmi command (testmode): %d\n",
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ret);
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goto out;
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}
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ret = 0;
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out:
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mutex_unlock(&ar->conf_mutex);
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return ret;
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}
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int ath10k_tm_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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void *data, int len)
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{
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struct ath10k *ar = hw->priv;
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struct nlattr *tb[ATH10K_TM_ATTR_MAX + 1];
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int ret;
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ret = nla_parse(tb, ATH10K_TM_ATTR_MAX, data, len,
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ath10k_tm_policy);
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if (ret)
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return ret;
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if (!tb[ATH10K_TM_ATTR_CMD])
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return -EINVAL;
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switch (nla_get_u32(tb[ATH10K_TM_ATTR_CMD])) {
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case ATH10K_TM_CMD_GET_VERSION:
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return ath10k_tm_cmd_get_version(ar, tb);
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case ATH10K_TM_CMD_UTF_START:
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return ath10k_tm_cmd_utf_start(ar, tb);
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case ATH10K_TM_CMD_UTF_STOP:
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return ath10k_tm_cmd_utf_stop(ar, tb);
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case ATH10K_TM_CMD_WMI:
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return ath10k_tm_cmd_wmi(ar, tb);
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default:
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return -EOPNOTSUPP;
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}
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}
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void ath10k_testmode_destroy(struct ath10k *ar)
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{
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mutex_lock(&ar->conf_mutex);
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if (ar->state != ATH10K_STATE_UTF) {
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/* utf firmware is not running, nothing to do */
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goto out;
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}
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__ath10k_tm_cmd_utf_stop(ar);
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out:
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mutex_unlock(&ar->conf_mutex);
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}
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