Return-path: Received: from mail-we0-f175.google.com ([74.125.82.175]:43750 "EHLO mail-we0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752452AbaEGTyE (ORCPT ); Wed, 7 May 2014 15:54:04 -0400 Received: by mail-we0-f175.google.com with SMTP id t61so1484990wes.6 for ; Wed, 07 May 2014 12:54:01 -0700 (PDT) From: Emmanuel Grumbach To: linux-wireless@vger.kernel.org Cc: Johannes Berg , Emmanuel Grumbach Subject: [PATCH 18/23] iwlwifi: mvm/pcie: capture last commands on firmware error Date: Wed, 7 May 2014 22:52:55 +0300 Message-Id: <1399492380-12050-18-git-send-email-egrumbach@gmail.com> (sfid-20140507_215430_699411_C0AAA8E5) In-Reply-To: <536A8EE3.2050906@gmail.com> References: <536A8EE3.2050906@gmail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Johannes Berg When a firmware error occurs, capture the last 32 commands (which are still in memory) in the error dump debugfs file. Signed-off-by: Johannes Berg Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h | 134 +++++++++++++++++++++++ drivers/net/wireless/iwlwifi/iwl-trans.h | 19 ++++ drivers/net/wireless/iwlwifi/mvm/debugfs.c | 2 +- drivers/net/wireless/iwlwifi/mvm/fw-error-dump.h | 108 ------------------ drivers/net/wireless/iwlwifi/mvm/ops.c | 18 ++- drivers/net/wireless/iwlwifi/pcie/internal.h | 7 ++ drivers/net/wireless/iwlwifi/pcie/trans.c | 60 ++++++++++ drivers/net/wireless/iwlwifi/pcie/tx.c | 40 ++++--- 8 files changed, 259 insertions(+), 129 deletions(-) create mode 100644 drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h delete mode 100644 drivers/net/wireless/iwlwifi/mvm/fw-error-dump.h diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h b/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h new file mode 100644 index 0000000..2953ffc --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h @@ -0,0 +1,134 @@ +/****************************************************************************** + * + * 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) 2014 Intel Corporation. All rights reserved. + * + * 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 + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + * + * BSD LICENSE + * + * Copyright(c) 2014 Intel Corporation. All rights reserved. + * 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. + *****************************************************************************/ + +#ifndef __fw_error_dump_h__ +#define __fw_error_dump_h__ + +#include + +#define IWL_FW_ERROR_DUMP_BARKER 0x14789632 + +/** + * enum iwl_fw_error_dump_type - types of data in the dump file + * @IWL_FW_ERROR_DUMP_SRAM: + * @IWL_FW_ERROR_DUMP_REG: + * @IWL_FW_ERROR_DUMP_RXF: + * @IWL_FW_ERROR_DUMP_TXCMD: last TX command data, structured as + * &struct iwl_fw_error_dump_txcmd packets + */ +enum iwl_fw_error_dump_type { + IWL_FW_ERROR_DUMP_SRAM = 0, + IWL_FW_ERROR_DUMP_REG = 1, + IWL_FW_ERROR_DUMP_RXF = 2, + IWL_FW_ERROR_DUMP_TXCMD = 3, + + IWL_FW_ERROR_DUMP_MAX, +}; + +/** + * struct iwl_fw_error_dump_data - data for one type + * @type: %enum iwl_fw_error_dump_type + * @len: the length starting from %data - must be a multiplier of 4. + * @data: the data itself padded to be a multiplier of 4. + */ +struct iwl_fw_error_dump_data { + __le32 type; + __le32 len; + __u8 data[]; +} __packed; + +/** + * struct iwl_fw_error_dump_file - the layout of the header of the file + * @barker: must be %IWL_FW_ERROR_DUMP_BARKER + * @file_len: the length of all the file starting from %barker + * @data: array of %struct iwl_fw_error_dump_data + */ +struct iwl_fw_error_dump_file { + __le32 barker; + __le32 file_len; + u8 data[0]; +} __packed; + +/** + * struct iwl_fw_error_dump_txcmd - TX command data + * @cmdlen: original length of command + * @caplen: captured length of command (may be less) + * @data: captured command data, @caplen bytes + */ +struct iwl_fw_error_dump_txcmd { + __le32 cmdlen; + __le32 caplen; + u8 data[]; +} __packed; + +/** + * iwl_mvm_fw_error_next_data - advance fw error dump data pointer + * @data: previous data block + * Returns: next data block + */ +static inline struct iwl_fw_error_dump_data * +iwl_mvm_fw_error_next_data(struct iwl_fw_error_dump_data *data) +{ + return (void *)(data->data + le32_to_cpu(data->len)); +} + +#endif /* __fw_error_dump_h__ */ diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h index 22fd94e..84ad48d 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/iwlwifi/iwl-trans.h @@ -463,6 +463,11 @@ struct iwl_trans; * @unref: release a reference previously taken with @ref. Note that * initially the reference count is 1, making an initial @unref * necessary to allow low power states. + * @dump_data: fill a data dump with debug data, maybe containing last + * TX'ed commands and similar. When called with a NULL buffer and + * zero buffer length, provide only the (estimated) required buffer + * length. Return the used buffer length. + * Note that the transport must fill in the proper file headers. */ struct iwl_trans_ops { @@ -511,6 +516,10 @@ struct iwl_trans_ops { u32 value); void (*ref)(struct iwl_trans *trans); void (*unref)(struct iwl_trans *trans); + +#ifdef CONFIG_IWLWIFI_DEBUGFS + u32 (*dump_data)(struct iwl_trans *trans, void *buf, u32 buflen); +#endif }; /** @@ -664,6 +673,16 @@ static inline void iwl_trans_unref(struct iwl_trans *trans) trans->ops->unref(trans); } +#ifdef CONFIG_IWLWIFI_DEBUGFS +static inline u32 iwl_trans_dump_data(struct iwl_trans *trans, + void *buf, u32 buflen) +{ + if (!trans->ops->dump_data) + return 0; + return trans->ops->dump_data(trans, buf, buflen); +} +#endif + static inline int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) { diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/iwlwifi/mvm/debugfs.c index f462c9b..bef487b 100644 --- a/drivers/net/wireless/iwlwifi/mvm/debugfs.c +++ b/drivers/net/wireless/iwlwifi/mvm/debugfs.c @@ -67,7 +67,7 @@ #include "iwl-io.h" #include "iwl-prph.h" #include "debugfs.h" -#include "fw-error-dump.h" +#include "iwl-fw-error-dump.h" static ssize_t iwl_dbgfs_tx_flush_write(struct iwl_mvm *mvm, char *buf, size_t count, loff_t *ppos) diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-error-dump.h b/drivers/net/wireless/iwlwifi/mvm/fw-error-dump.h deleted file mode 100644 index f381908..0000000 --- a/drivers/net/wireless/iwlwifi/mvm/fw-error-dump.h +++ /dev/null @@ -1,108 +0,0 @@ -/****************************************************************************** - * - * 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) 2014 Intel Corporation. All rights reserved. - * - * 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 - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - * BSD LICENSE - * - * Copyright(c) 2014 Intel Corporation. All rights reserved. - * 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. - *****************************************************************************/ - -#ifndef __fw_error_dump_h__ -#define __fw_error_dump_h__ - -#include - -#define IWL_FW_ERROR_DUMP_BARKER 0x14789632 - -/** - * enum iwl_fw_error_dump_type - types of data in the dump file - * @IWL_FW_ERROR_DUMP_SRAM: - * @IWL_FW_ERROR_DUMP_REG: - * @IWL_FW_ERROR_DUMP_RXF: - */ -enum iwl_fw_error_dump_type { - IWL_FW_ERROR_DUMP_SRAM = 0, - IWL_FW_ERROR_DUMP_REG = 1, - IWL_FW_ERROR_DUMP_RXF = 2, - - IWL_FW_ERROR_DUMP_MAX, -}; - -/** - * struct iwl_fw_error_dump_data - data for one type - * @type: %enum iwl_fw_error_dump_type - * @len: the length starting from %data - must be a multiplier of 4. - * @data: the data itself padded to be a multiplier of 4. - */ -struct iwl_fw_error_dump_data { - __le32 type; - __le32 len; - __u8 data[]; -} __packed; - -/** - * struct iwl_fw_error_dump_file - the layout of the header of the file - * @barker: must be %IWL_FW_ERROR_DUMP_BARKER - * @file_len: the length of all the file starting from %barker - * @data: array of %struct iwl_fw_error_dump_data - */ -struct iwl_fw_error_dump_file { - __le32 barker; - __le32 file_len; - u8 data[0]; -} __packed; - -#endif /* __fw_error_dump_h__ */ diff --git a/drivers/net/wireless/iwlwifi/mvm/ops.c b/drivers/net/wireless/iwlwifi/mvm/ops.c index 3c14ea1..cd526e1 100644 --- a/drivers/net/wireless/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/iwlwifi/mvm/ops.c @@ -79,8 +79,8 @@ #include "iwl-prph.h" #include "rs.h" #include "fw-api-scan.h" -#include "fw-error-dump.h" #include "time-event.h" +#include "iwl-fw-error-dump.h" /* * module name, copyright, version, etc. @@ -822,6 +822,7 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm) struct iwl_fw_error_dump_file *dump_file; struct iwl_fw_error_dump_data *dump_data; u32 file_len; + u32 trans_len; lockdep_assert_held(&mvm->mutex); @@ -833,6 +834,10 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm) sizeof(*dump_file) + sizeof(*dump_data) * 2; + trans_len = iwl_trans_dump_data(mvm->trans, NULL, 0); + if (trans_len) + file_len += trans_len; + dump_file = vmalloc(file_len); if (!dump_file) return; @@ -846,7 +851,7 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm) dump_data->len = cpu_to_le32(mvm->fw_error_rxf_len); memcpy(dump_data->data, mvm->fw_error_rxf, mvm->fw_error_rxf_len); - dump_data = (void *)((u8 *)dump_data->data + mvm->fw_error_rxf_len); + dump_data = iwl_mvm_fw_error_next_data(dump_data); dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM); dump_data->len = cpu_to_le32(mvm->fw_error_sram_len); @@ -864,6 +869,15 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm) kfree(mvm->fw_error_sram); mvm->fw_error_sram = NULL; mvm->fw_error_sram_len = 0; + + if (trans_len) { + void *buf = iwl_mvm_fw_error_next_data(dump_data); + u32 real_trans_len = iwl_trans_dump_data(mvm->trans, buf, + trans_len); + dump_data = (void *)((u8 *)buf + real_trans_len); + dump_file->file_len = + cpu_to_le32(file_len - trans_len + real_trans_len); + } } #endif diff --git a/drivers/net/wireless/iwlwifi/pcie/internal.h b/drivers/net/wireless/iwlwifi/pcie/internal.h index ab21aee..6c22b23 100644 --- a/drivers/net/wireless/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/iwlwifi/pcie/internal.h @@ -370,6 +370,13 @@ void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn, struct sk_buff_head *skbs); void iwl_trans_pcie_tx_reset(struct iwl_trans *trans); +static inline u16 iwl_pcie_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx) +{ + struct iwl_tfd_tb *tb = &tfd->tbs[idx]; + + return le16_to_cpu(tb->hi_n_len) >> 4; +} + /***************************************************** * Error handling ******************************************************/ diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index a6f8622..f41f9b7 100644 --- a/drivers/net/wireless/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/iwlwifi/pcie/trans.c @@ -73,6 +73,7 @@ #include "iwl-csr.h" #include "iwl-prph.h" #include "iwl-agn-hw.h" +#include "iwl-fw-error-dump.h" #include "internal.h" static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg) @@ -1669,6 +1670,61 @@ err: IWL_ERR(trans, "failed to create the trans debugfs entry\n"); return -ENOMEM; } + +static u32 iwl_trans_pcie_get_cmdlen(struct iwl_tfd *tfd) +{ + u32 cmdlen = 0; + int i; + + for (i = 0; i < IWL_NUM_OF_TBS; i++) + cmdlen += iwl_pcie_tfd_tb_get_len(tfd, i); + + return cmdlen; +} + +static u32 iwl_trans_pcie_dump_data(struct iwl_trans *trans, + void *buf, u32 buflen) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + struct iwl_fw_error_dump_data *data; + struct iwl_txq *cmdq = &trans_pcie->txq[trans_pcie->cmd_queue]; + struct iwl_fw_error_dump_txcmd *txcmd; + u32 len; + int i, ptr; + + if (!buf) + return sizeof(*data) + + cmdq->q.n_window * (sizeof(*txcmd) + + TFD_MAX_PAYLOAD_SIZE); + + len = 0; + data = buf; + data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD); + txcmd = (void *)data->data; + spin_lock_bh(&cmdq->lock); + ptr = cmdq->q.write_ptr; + for (i = 0; i < cmdq->q.n_window; i++) { + u8 idx = get_cmd_index(&cmdq->q, ptr); + u32 caplen, cmdlen; + + cmdlen = iwl_trans_pcie_get_cmdlen(&cmdq->tfds[ptr]); + caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen); + + if (cmdlen) { + len += sizeof(*txcmd) + caplen; + txcmd->cmdlen = cpu_to_le32(cmdlen); + txcmd->caplen = cpu_to_le32(caplen); + memcpy(txcmd->data, cmdq->entries[idx].cmd, caplen); + txcmd = (void *)((u8 *)txcmd->data + caplen); + } + + ptr = iwl_queue_dec_wrap(ptr); + } + spin_unlock_bh(&cmdq->lock); + + data->len = cpu_to_le32(len); + return sizeof(*data) + len; +} #else static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, struct dentry *dir) @@ -1711,6 +1767,10 @@ static const struct iwl_trans_ops trans_ops_pcie = { .grab_nic_access = iwl_trans_pcie_grab_nic_access, .release_nic_access = iwl_trans_pcie_release_nic_access, .set_bits_mask = iwl_trans_pcie_set_bits_mask, + +#ifdef CONFIG_IWLWIFI_DEBUGFS + .dump_data = iwl_trans_pcie_dump_data, +#endif }; struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev, diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c b/drivers/net/wireless/iwlwifi/pcie/tx.c index 93709fe..77a512a 100644 --- a/drivers/net/wireless/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/iwlwifi/pcie/tx.c @@ -353,13 +353,6 @@ static inline dma_addr_t iwl_pcie_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx) return addr; } -static inline u16 iwl_pcie_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx) -{ - struct iwl_tfd_tb *tb = &tfd->tbs[idx]; - - return le16_to_cpu(tb->hi_n_len) >> 4; -} - static inline void iwl_pcie_tfd_set_tb(struct iwl_tfd *tfd, u8 idx, dma_addr_t addr, u16 len) { @@ -1322,28 +1315,39 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans, cmd_pos = offsetof(struct iwl_device_cmd, payload); copy_size = sizeof(out_cmd->hdr); for (i = 0; i < IWL_MAX_CMD_TBS_PER_TFD; i++) { - int copy = 0; + int copy; if (!cmd->len[i]) continue; - /* need at least IWL_HCMD_SCRATCHBUF_SIZE copied */ - if (copy_size < IWL_HCMD_SCRATCHBUF_SIZE) { - copy = IWL_HCMD_SCRATCHBUF_SIZE - copy_size; - - if (copy > cmd->len[i]) - copy = cmd->len[i]; - } - /* copy everything if not nocopy/dup */ if (!(cmd->dataflags[i] & (IWL_HCMD_DFL_NOCOPY | - IWL_HCMD_DFL_DUP))) + IWL_HCMD_DFL_DUP))) { copy = cmd->len[i]; - if (copy) { memcpy((u8 *)out_cmd + cmd_pos, cmd->data[i], copy); cmd_pos += copy; copy_size += copy; + continue; + } + + /* + * Otherwise we need at least IWL_HCMD_SCRATCHBUF_SIZE copied + * in total (for the scratchbuf handling), but copy up to what + * we can fit into the payload for debug dump purposes. + */ + copy = min_t(int, TFD_MAX_PAYLOAD_SIZE - cmd_pos, cmd->len[i]); + + memcpy((u8 *)out_cmd + cmd_pos, cmd->data[i], copy); + cmd_pos += copy; + + /* However, treat copy_size the proper way, we need it below */ + if (copy_size < IWL_HCMD_SCRATCHBUF_SIZE) { + copy = IWL_HCMD_SCRATCHBUF_SIZE - copy_size; + + if (copy > cmd->len[i]) + copy = cmd->len[i]; + copy_size += copy; } } -- 1.8.3.2