iwlwifi: device tracing

In order to have an easier way to debug issues, create
trace events (using the ftrace framework) that will
allow us to follow exactly what the driver is doing
with the device.

The text format isn't all that useful, but the binary
format can also be obtained easily via debugfs and
then analysed on the fly or offline with debugging
tools.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 3575e7f..d0d1b7f 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -1404,6 +1404,9 @@ static void iwl3945_rx_handle(struct iwl_priv *priv)
 				PCI_DMA_FROMDEVICE);
 		pkt = (struct iwl_rx_packet *)rxb->skb->data;
 
+		trace_iwlwifi_dev_rx(priv, pkt,
+			le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
+
 		/* Reclaim a command buffer only if this packet is a response
 		 *   to a (driver-originated) command.
 		 * If the packet (e.g. Rx frame) originated from uCode,
@@ -1549,8 +1552,9 @@ void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
 			"%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
 			desc_lookup(desc), desc, time, blink1, blink2,
 			ilink1, ilink2, data1);
+		trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
+					0, blink1, blink2, ilink1, ilink2);
 	}
-
 }
 
 #define EVENT_START_OFFSET  (6 * sizeof(u32))
@@ -1590,10 +1594,12 @@ static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
 		if (mode == 0) {
 			/* data, ev */
 			IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
+			trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
 		} else {
 			data = iwl_read_targ_mem(priv, ptr);
 			ptr += sizeof(u32);
 			IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
+			trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
 		}
 	}
 }