[PATCH 4/6] ath10k: add coredump_mask module parameter
Kalle Valo
kvalo at qca.qualcomm.com
Tue Aug 15 01:23:32 PDT 2017
For memory dump support (it consumes quite a lot of memory) we need to control
what is exactly stored to the crash dump. Add a module parameter call
coredump_mask to do that. It's a bit mask of these values:
enum ath10k_fw_crash_dump_type {
ATH10K_FW_CRASH_DUMP_REGISTERS = 0,
ATH10K_FW_CRASH_DUMP_CE_DATA = 1,
ATH10K_FW_CRASH_DUMP_MAX,
};
For example, if we only want to store CE_DATA we would enable bit 2:
modprobe ath10k_core coredump_mask=0x2
Signed-off-by: Kalle Valo <kvalo at qca.qualcomm.com>
---
drivers/net/wireless/ath/ath10k/core.c | 8 ++++
drivers/net/wireless/ath/ath10k/core.h | 2 +
drivers/net/wireless/ath/ath10k/coredump.c | 63 ++++++++++++++++++----------
3 files changed, 51 insertions(+), 22 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 7b465973d2ca..ad3cad84fd22 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -40,17 +40,25 @@ static bool uart_print;
static bool skip_otp;
static bool rawmode;
+/* Enable ATH10K_FW_CRASH_DUMP_REGISTERS and ATH10K_FW_CRASH_DUMP_CE_DATA
+ * by default.
+ */
+unsigned long ath10k_coredump_mask = 0x3;
+
+/* FIXME: most of these should be readonly */
module_param_named(debug_mask, ath10k_debug_mask, uint, 0644);
module_param_named(cryptmode, ath10k_cryptmode_param, uint, 0644);
module_param(uart_print, bool, 0644);
module_param(skip_otp, bool, 0644);
module_param(rawmode, bool, 0644);
+module_param_named(coredump_mask, ath10k_coredump_mask, ulong, 0444);
MODULE_PARM_DESC(debug_mask, "Debugging mask");
MODULE_PARM_DESC(uart_print, "Uart target debugging");
MODULE_PARM_DESC(skip_otp, "Skip otp failure for calibration in testmode");
MODULE_PARM_DESC(cryptmode, "Crypto mode: 0-hardware, 1-software");
MODULE_PARM_DESC(rawmode, "Use raw 802.11 frame datapath");
+MODULE_PARM_DESC(coredump_mask, "Bitfield of what to include in firmware crash file");
static const struct ath10k_hw_params ath10k_hw_params_list[] = {
{
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 06f85ae752fe..04c98f00ace2 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -1015,6 +1015,8 @@ static inline bool ath10k_peer_stats_enabled(struct ath10k *ar)
return false;
}
+extern unsigned long ath10k_coredump_mask;
+
struct ath10k *ath10k_core_create(size_t priv_size, struct device *dev,
enum ath10k_bus bus,
enum ath10k_hw_rev hw_rev,
diff --git a/drivers/net/wireless/ath/ath10k/coredump.c b/drivers/net/wireless/ath/ath10k/coredump.c
index 512d44fa5848..1a7df3d31b64 100644
--- a/drivers/net/wireless/ath/ath10k/coredump.c
+++ b/drivers/net/wireless/ath/ath10k/coredump.c
@@ -27,6 +27,10 @@ struct ath10k_fw_crash_data *ath10k_coredump_new(struct ath10k *ar)
lockdep_assert_held(&ar->data_lock);
+ if (ath10k_coredump_mask == 0)
+ /* coredump disabled */
+ return NULL;
+
guid_gen(&crash_data->guid);
getnstimeofday(&crash_data->timestamp);
@@ -45,9 +49,13 @@ static struct ath10k_dump_file_data *ath10k_coredump_build(struct ath10k *ar)
unsigned char *buf;
len = hdr_len;
- len += sizeof(*dump_tlv) + sizeof(crash_data->registers);
- len += sizeof(*dump_tlv) + sizeof(*ce_hdr) +
- CE_COUNT * sizeof(ce_hdr->entries[0]);
+
+ if (test_bit(ATH10K_FW_CRASH_DUMP_REGISTERS, &ath10k_coredump_mask))
+ len += sizeof(*dump_tlv) + sizeof(crash_data->registers);
+
+ if (test_bit(ATH10K_FW_CRASH_DUMP_CE_DATA, &ath10k_coredump_mask))
+ len += sizeof(*dump_tlv) + sizeof(*ce_hdr) +
+ CE_COUNT * sizeof(ce_hdr->entries[0]);
sofar += hdr_len;
@@ -92,25 +100,28 @@ static struct ath10k_dump_file_data *ath10k_coredump_build(struct ath10k *ar)
dump_data->tv_sec = cpu_to_le64(crash_data->timestamp.tv_sec);
dump_data->tv_nsec = cpu_to_le64(crash_data->timestamp.tv_nsec);
- /* Gather crash-dump */
- dump_tlv = (struct ath10k_tlv_dump_data *)(buf + sofar);
- dump_tlv->type = cpu_to_le32(ATH10K_FW_CRASH_DUMP_REGISTERS);
- dump_tlv->tlv_len = cpu_to_le32(sizeof(crash_data->registers));
- memcpy(dump_tlv->tlv_data, &crash_data->registers,
- sizeof(crash_data->registers));
- sofar += sizeof(*dump_tlv) + sizeof(crash_data->registers);
-
- dump_tlv = (struct ath10k_tlv_dump_data *)(buf + sofar);
- dump_tlv->type = cpu_to_le32(ATH10K_FW_CRASH_DUMP_CE_DATA);
- dump_tlv->tlv_len = cpu_to_le32(sizeof(*ce_hdr) +
- CE_COUNT * sizeof(ce_hdr->entries[0]));
- ce_hdr = (struct ath10k_ce_crash_hdr *)(dump_tlv->tlv_data);
- ce_hdr->ce_count = cpu_to_le32(CE_COUNT);
- memset(ce_hdr->reserved, 0, sizeof(ce_hdr->reserved));
- memcpy(ce_hdr->entries, crash_data->ce_crash_data,
- CE_COUNT * sizeof(ce_hdr->entries[0]));
- sofar += sizeof(*dump_tlv) + sizeof(*ce_hdr) +
- CE_COUNT * sizeof(ce_hdr->entries[0]);
+ if (test_bit(ATH10K_FW_CRASH_DUMP_REGISTERS, &ath10k_coredump_mask)) {
+ dump_tlv = (struct ath10k_tlv_dump_data *)(buf + sofar);
+ dump_tlv->type = cpu_to_le32(ATH10K_FW_CRASH_DUMP_REGISTERS);
+ dump_tlv->tlv_len = cpu_to_le32(sizeof(crash_data->registers));
+ memcpy(dump_tlv->tlv_data, &crash_data->registers,
+ sizeof(crash_data->registers));
+ sofar += sizeof(*dump_tlv) + sizeof(crash_data->registers);
+ }
+
+ if (test_bit(ATH10K_FW_CRASH_DUMP_CE_DATA, &ath10k_coredump_mask)) {
+ dump_tlv = (struct ath10k_tlv_dump_data *)(buf + sofar);
+ dump_tlv->type = cpu_to_le32(ATH10K_FW_CRASH_DUMP_CE_DATA);
+ dump_tlv->tlv_len = cpu_to_le32(sizeof(*ce_hdr) +
+ CE_COUNT * sizeof(ce_hdr->entries[0]));
+ ce_hdr = (struct ath10k_ce_crash_hdr *)(dump_tlv->tlv_data);
+ ce_hdr->ce_count = cpu_to_le32(CE_COUNT);
+ memset(ce_hdr->reserved, 0, sizeof(ce_hdr->reserved));
+ memcpy(ce_hdr->entries, crash_data->ce_crash_data,
+ CE_COUNT * sizeof(ce_hdr->entries[0]));
+ sofar += sizeof(*dump_tlv) + sizeof(*ce_hdr) +
+ CE_COUNT * sizeof(ce_hdr->entries[0]);
+ }
spin_unlock_bh(&ar->data_lock);
@@ -121,6 +132,10 @@ int ath10k_coredump_submit(struct ath10k *ar)
{
struct ath10k_dump_file_data *dump;
+ if (ath10k_coredump_mask == 0)
+ /* coredump disabled */
+ return 0;
+
dump = ath10k_coredump_build(ar);
if (!dump) {
ath10k_warn(ar, "no crash dump data found for devcoredump");
@@ -134,6 +149,10 @@ int ath10k_coredump_submit(struct ath10k *ar)
int ath10k_coredump_create(struct ath10k *ar)
{
+ if (ath10k_coredump_mask == 0)
+ /* coredump disabled */
+ return 0;
+
ar->coredump.fw_crash_data = vzalloc(sizeof(*ar->coredump.fw_crash_data));
if (!ar->coredump.fw_crash_data)
return -ENOMEM;
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