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Message-ID: <20130111020234.15463.3763.stgit@starfish.jf.intel.com>
Date: Thu, 10 Jan 2013 18:02:36 -0800
From: Shannon Nelson <shannon.nelson@...el.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, dwmw2@...radead.org,
jeffrey.t.kirsher@...el.com, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] ixgbe: add additional parameter options
With the new userland ASCII parameter file available, add a few
new parameters for finer control of some driver activity.
dca=off Disable DCA (Direct Cache Access) activity
FdirPballoc=N
Flow Director packet buffer allocation control
1 = 8k hash filters or 2k perfect filters
2 = 16k hash filters or 4k perfect filters
3 = 32k hash filters or 8k perfect filters
AtrSampleRate=N
Set the Software ATR Tx packet sample rate to every Nth packet,
from 0 (disabled) to 255.
Signed-off-by: Shannon Nelson <shannon.nelson@...el.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc: David Woodhouse <dwmw2@...radead.org>
---
drivers/net/ethernet/intel/ixgbe/ixgbe.h | 4 ++
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 63 +++++++++++++++++++++++++
2 files changed, 66 insertions(+), 1 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index 8e78676..adfcd58 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -111,6 +111,10 @@
#define IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT 29
#define IXGBE_TX_FLAGS_VLAN_SHIFT 16
+#define IXGBE_MAX_ATR_SAMPLE_RATE 255
+#define IXGBE_MIN_ATR_SAMPLE_RATE 1
+#define IXGBE_ATR_SAMPLE_RATE_OFF 0
+
#define IXGBE_MAX_VF_MC_ENTRIES 30
#define IXGBE_MAX_VF_FUNCTIONS 64
#define IXGBE_MAX_VFTA_ENTRIES 128
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 1670fc7..9a94ca2 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -164,6 +164,11 @@ enum {
#ifdef CONFIG_PCI_IOV
Opt_max_vfs,
#endif
+#ifdef CONFIG_IXGBE_DCA
+ Opt_no_dca,
+#endif
+ Opt_FdirPballoc,
+ Opt_AtrSampleRate,
};
static const match_table_t tokens = {
@@ -172,6 +177,11 @@ static const match_table_t tokens = {
#ifdef CONFIG_PCI_IOV
{ Opt_max_vfs, "max_vfs=%u" },
#endif
+#ifdef CONFIG_IXGBE_DCA
+ { Opt_no_dca, "nodca" },
+#endif
+ { Opt_FdirPballoc, "FdirPballoc=%u" },
+ { Opt_AtrSampleRate, "AtrSampleRate=%u" },
/* terminator token */
{ 0, NULL },
@@ -181,6 +191,9 @@ MODULE_INFO(fw_option, "allow_unsupported_sfp : Allow unsupported and untested S
MODULE_INFO(fw_option,
"max_vfs=N : Maximum number of virtual functions per physical function (default=0) - 0 <= N < "
xstr(IXGBE_MAX_VF_FUNCTIONS));
+MODULE_INFO(fw_option, "nodca : Disable Direct Cache Access");
+MODULE_INFO(fw_option, "FdirPballoc=N : Flow Director packet buffer allocation level - 1, 2, or 3");
+MODULE_INFO(fw_option, "AtrSampleRate=N : Software ATR Tx packet sample rate, 0-255");
/**
* ixgbe_parse_option_line - find ixgbe options
@@ -195,7 +208,7 @@ static void ixgbe_parse_option_line(struct ixgbe_adapter *adapter,
char *p;
char *next_option = config_line;
substring_t args[MAX_OPT_ARGS];
- int value;
+ int value, x;
if (!config_line)
return;
@@ -239,6 +252,54 @@ static void ixgbe_parse_option_line(struct ixgbe_adapter *adapter,
break;
#endif
+#ifdef CONFIG_IXGBE_DCA
+ case Opt_no_dca:
+ adapter->flags &= ~(IXGBE_FLAG_DCA_CAPABLE |
+ IXGBE_FLAG_DCA_ENABLED);
+ break;
+
+#endif
+ case Opt_FdirPballoc:
+ if (match_int(args, &value))
+ goto parse_error;
+
+ x = adapter->fdir_pballoc;
+ if (adapter->hw.mac.type == ixgbe_mac_82598EB
+ || value == IXGBE_FDIR_PBALLOC_NONE) {
+ adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_NONE;
+ x = 0;
+ } else if (value == IXGBE_FDIR_PBALLOC_256K) {
+ adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_256K;
+ x = 256;
+ } else if (value == IXGBE_FDIR_PBALLOC_128K) {
+ adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_128K;
+ x = 128;
+ } else if (value == IXGBE_FDIR_PBALLOC_64K) {
+ adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
+ x = 64;
+ } else {
+ e_dev_err("Bad FdirPballoc value %d\n", value);
+ }
+
+ e_dev_err(
+ "Flow Director will be allocated %dKB of packet buffer\n",
+ x);
+ break;
+
+ case Opt_AtrSampleRate:
+ if (match_int(args, &value))
+ goto parse_error;
+
+ if (adapter->hw.mac.type == ixgbe_mac_82598EB
+ || value == IXGBE_ATR_SAMPLE_RATE_OFF)
+ adapter->atr_sample_rate = value;
+ else if (value >= IXGBE_MIN_ATR_SAMPLE_RATE
+ && value <= IXGBE_MAX_ATR_SAMPLE_RATE)
+ adapter->atr_sample_rate = value;
+ else
+ e_dev_err("Bad AtrSampleRate %d\n", value);
+ break;
+
default:
goto parse_error;
break;
--
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