diff options
| author | Ben Greear <greearb@candelatech.com> | 2014-09-10 17:59:28 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@qca.qualcomm.com> | 2014-09-11 22:44:17 +0200 |
| commit | d5aebc77b47f9e0a2b465fbcf77bde033a231c24 (patch) | |
| tree | aa35867b9b5efe1419f093bc10828ffb437c4a30 /drivers/net/wireless/ath | |
| parent | ath10k: add testmode (diff) | |
| download | linux-d5aebc77b47f9e0a2b465fbcf77bde033a231c24.tar.xz linux-d5aebc77b47f9e0a2b465fbcf77bde033a231c24.zip | |
ath10k: support firmware crash-by-assert
10.1 firmware does not have an official way to
cause assert on purpose, but it can be done with
carefully crafted WMI command. This is a different
kind of crash from the 'hard' crash, which is
a bad memory dereference.
Different crashes decode in different manners, so
this will help the crash-report testing as well as
offer better ways to test firmware failure and
recovery.
kvalo: move the wmi command creation to debug.c, modify
the info print
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Diffstat (limited to 'drivers/net/wireless/ath')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/debug.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c index f948a4d8ee59..c5d01058c2a3 100644 --- a/drivers/net/wireless/ath/ath10k/debug.c +++ b/drivers/net/wireless/ath/ath10k/debug.c @@ -565,6 +565,26 @@ static const struct file_operations fops_fw_stats = { .llseek = default_llseek, }; +/* This is a clean assert crash in firmware. */ +static int ath10k_debug_fw_assert(struct ath10k *ar) +{ + struct wmi_vdev_install_key_cmd *cmd; + struct sk_buff *skb; + + skb = ath10k_wmi_alloc_skb(ar, sizeof(*cmd) + 16); + if (!skb) + return -ENOMEM; + + cmd = (struct wmi_vdev_install_key_cmd *)skb->data; + memset(cmd, 0, sizeof(*cmd)); + + /* big enough number so that firmware asserts */ + cmd->vdev_id = __cpu_to_le32(0x7ffe); + + return ath10k_wmi_cmd_send(ar, skb, + ar->wmi.cmd->vdev_install_key_cmdid); +} + static ssize_t ath10k_read_simulate_fw_crash(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) @@ -574,7 +594,10 @@ static ssize_t ath10k_read_simulate_fw_crash(struct file *file, " WMI_FORCE_FW_HANG_ASSERT to firmware if FW" " supports that command.\n `hard` - this will send" " to firmware command with illegal parameters" - " causing firmware crash.\n"; + " causing firmware crash.\n" + "`assert` - this will send special illegal parameter" + " to firmware to cause assert failure" + " and crash.\n"; return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); } @@ -623,6 +646,9 @@ static ssize_t ath10k_write_simulate_fw_crash(struct file *file, */ ret = ath10k_wmi_vdev_set_param(ar, 0x7fff, ar->wmi.vdev_param->rts_threshold, 0); + } else if (!strcmp(buf, "assert")) { + ath10k_info(ar, "simulating firmware assert crash\n"); + ret = ath10k_debug_fw_assert(ar); } else { ret = -EINVAL; goto exit; |