[PATCH v4 4/5] ath10k: Dump exception stack contents on firmware crash.
From: <hidden>
Date: 2014-07-23 16:38:19
Subsystem:
atheros ath generic utilities, qualcomm atheros ath10k wireless driver, the rest · Maintainers:
Jeff Johnson, Linus Torvalds
From: Ben Greear <redacted> Firmware developers can decode this and maybe figure out why the firmware crashed. Signed-off-by: Ben Greear <redacted> --- drivers/net/wireless/ath/ath10k/core.h | 3 +++ drivers/net/wireless/ath/ath10k/debug.c | 8 ++++++++ drivers/net/wireless/ath/ath10k/pci.c | 13 +++++++++++-- 3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 2f200f6..f122eae 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h@@ -281,11 +281,13 @@ struct ath10k_vif_iter { * @ATH10K_FW_ERROR_DUMP_DBGLOG: Recent firmware debug log entries * @ATH10K_FW_ERROR_DUMP_REGDUMP: Register crash dump in binary format * @ATH10K_FW_ERROR_DUMP_STACK: Stack memory contents. + * @ATH10K_FW_ERROR_DUMP_EXC_STACK: Exception stack contents */ enum ath10k_fw_error_dump_type { ATH10K_FW_ERROR_DUMP_DBGLOG = 0, ATH10K_FW_ERROR_DUMP_REGDUMP = 1, ATH10K_FW_ERROR_DUMP_STACK = 2, + ATH10K_FW_ERROR_DUMP_EXC_STACK = 3, ATH10K_FW_ERROR_DUMP_MAX, };
@@ -367,6 +369,7 @@ struct ath10k_debug { struct ath10k_dbglog_entry_storage dbglog_entry_data; u32 reg_dump_values[REG_DUMP_COUNT_QCA988X]; unsigned char stack_buf[ATH10K_FW_STACK_SIZE]; + unsigned char exc_stack_buf[ATH10K_FW_STACK_SIZE]; }; enum ath10k_state {
diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index 6fec433..8995f0f 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c@@ -621,6 +621,7 @@ static struct ath10k_dump_file_data *ath10k_build_dump_file(struct ath10k *ar) len += sizeof(*dump_tlv) + sizeof(ar->debug.reg_dump_values); len += sizeof(*dump_tlv) + sizeof(ar->debug.dbglog_entry_data); len += sizeof(*dump_tlv) + sizeof(ar->debug.stack_buf); + len += sizeof(*dump_tlv) + sizeof(ar->debug.exc_stack_buf); lockdep_assert_held(&ar->conf_mutex);
@@ -694,6 +695,13 @@ static struct ath10k_dump_file_data *ath10k_build_dump_file(struct ath10k *ar) memcpy(dump_tlv->tlv_data, &ar->debug.stack_buf, dump_tlv->tlv_len); sofar += sizeof(*dump_tlv) + dump_tlv->tlv_len; + /* Gather firmware exception (irq) stack dump */ + dump_tlv = (struct ath10k_tlv_dump_data *)(buf + sofar); + dump_tlv->type = ATH10K_FW_ERROR_DUMP_EXC_STACK; + dump_tlv->tlv_len = sizeof(ar->debug.exc_stack_buf); + memcpy(dump_tlv->tlv_data, &ar->debug.exc_stack_buf, dump_tlv->tlv_len); + sofar += sizeof(*dump_tlv) + dump_tlv->tlv_len; + spin_unlock_bh(&ar->data_lock); WARN_ON(sofar != len);
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index b58f1a1..d298e14 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c@@ -864,8 +864,15 @@ static void ath10k_save_firmware_stack(struct ath10k *ar) ath10k_save_firmware_mem_helper(ar, ATH10K_FW_STACK_SIZE, ar->debug.stack_buf, HI_ITEM(hi_stack)); } -#endif +/* Save the firmware exception stack */ +static void ath10k_save_firmware_exc_stack(struct ath10k *ar) +{ + ath10k_save_firmware_mem_helper(ar, ATH10K_FW_STACK_SIZE, + ar->debug.exc_stack_buf, + HI_ITEM(hi_err_stack)); +} +#endif static void ath10k_pci_hif_dump_area(struct ath10k *ar) {
@@ -918,8 +925,10 @@ static void ath10k_pci_hif_dump_area(struct ath10k *ar) #ifdef CONFIG_ATH10K_DEBUGFS spin_lock_bh(&ar->data_lock); - if (!ar->debug.crashed_since_read) + if (!ar->debug.crashed_since_read) { ath10k_save_firmware_stack(ar); + ath10k_save_firmware_exc_stack(ar); + } spin_unlock_bh(&ar->data_lock);
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1.7.11.7