From 3169c323cf9dc3b00b0a6a3d434968832daa4147 Mon Sep 17 00:00:00 2001
From: Jesse Brandeburg <jesse.brandeburg@intel.com>
Date: Tue, 7 Apr 2015 19:45:37 -0400
Subject: i40e: enable user dump of internal hardware state

This is a feature to enable better debugging of user reported issues by
allowing a bash script to acquire information about the internal hardware
state. The data output to the kernel log is collected by the script and can
then be sent to Intel. This is a critical debugging feature for helping us
interpret and reproduce complex customer setups.

Change-ID: Ie8b3ab09086d6870a709015f51ada05af10b41bb
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_debugfs.c | 45 ++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

(limited to 'drivers/net/ethernet/intel/i40e/i40e_debugfs.c')

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index daa88263af66..34170eabca7d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -1388,6 +1388,50 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
 					 r_cfg->app[i].selector,
 					 r_cfg->app[i].protocolid);
 			}
+		} else if (strncmp(&cmd_buf[5], "debug fwdata", 12) == 0) {
+			int cluster_id, table_id;
+			int index, ret;
+			u16 buff_len = 4096;
+			u32 next_index;
+			u8 next_table;
+			u8 *buff;
+			u16 rlen;
+
+			cnt = sscanf(&cmd_buf[18], "%i %i %i",
+				     &cluster_id, &table_id, &index);
+			if (cnt != 3) {
+				dev_info(&pf->pdev->dev,
+					 "dump debug fwdata <cluster_id> <table_id> <index>\n");
+				goto command_write_done;
+			}
+
+			dev_info(&pf->pdev->dev,
+				 "AQ debug dump fwdata params %x %x %x %x\n",
+				 cluster_id, table_id, index, buff_len);
+			buff = kzalloc(buff_len, GFP_KERNEL);
+			if (!buff)
+				goto command_write_done;
+
+			ret = i40e_aq_debug_dump(&pf->hw, cluster_id, table_id,
+						 index, buff_len, buff, &rlen,
+						 &next_table, &next_index,
+						 NULL);
+			if (ret) {
+				dev_info(&pf->pdev->dev,
+					 "debug dump fwdata AQ Failed %d 0x%x\n",
+					 ret, pf->hw.aq.asq_last_status);
+				kfree(buff);
+				buff = NULL;
+				goto command_write_done;
+			}
+			dev_info(&pf->pdev->dev,
+				 "AQ debug dump fwdata rlen=0x%x next_table=0x%x next_index=0x%x\n",
+				 rlen, next_table, next_index);
+			print_hex_dump(KERN_INFO, "AQ buffer WB: ",
+				       DUMP_PREFIX_OFFSET, 16, 1,
+				       buff, rlen, true);
+			kfree(buff);
+			buff = NULL;
 		} else {
 			dev_info(&pf->pdev->dev,
 				 "dump desc tx <vsi_seid> <ring_id> [<desc_n>], dump desc rx <vsi_seid> <ring_id> [<desc_n>],\n");
@@ -1903,6 +1947,7 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
 		dev_info(&pf->pdev->dev, "  dump desc rx <vsi_seid> <ring_id> [<desc_n>]\n");
 		dev_info(&pf->pdev->dev, "  dump desc aq\n");
 		dev_info(&pf->pdev->dev, "  dump reset stats\n");
+		dev_info(&pf->pdev->dev, "  dump debug fwdata <cluster_id> <table_id> <index>\n");
 		dev_info(&pf->pdev->dev, "  msg_enable [level]\n");
 		dev_info(&pf->pdev->dev, "  read <reg>\n");
 		dev_info(&pf->pdev->dev, "  write <reg> <value>\n");
-- 
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