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Date: Thu, 25 Apr 2013 21:57:09 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Emil Tantilov <emil.s.tantilov@...el.com>, netdev@...r.kernel.org,
gospo@...hat.com, sassmann@...hat.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 6/8] ixgbe: cache AUTOC reads
From: Emil Tantilov <emil.s.tantilov@...el.com>
This patch removes majority of the AUTOC register reads by using a cached
value instead.
The reason for this change is to avoid writing corrupted values to AUTOC
due to bad FW.
Signed-off-by: Emil Tantilov <emil.s.tantilov@...el.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c | 40 +++++++++++++++-----------
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 1 +
2 files changed, 25 insertions(+), 16 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
index 3f79242..c4c5e87 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
@@ -167,9 +167,9 @@ static s32 ixgbe_setup_sfp_modules_82599(struct ixgbe_hw *hw)
}
/* Restart DSP and set SFI mode */
- IXGBE_WRITE_REG(hw, IXGBE_AUTOC, (IXGBE_READ_REG(hw,
- IXGBE_AUTOC) | IXGBE_AUTOC_LMS_10G_SERIAL));
-
+ IXGBE_WRITE_REG(hw, IXGBE_AUTOC, ((hw->mac.orig_autoc) |
+ IXGBE_AUTOC_LMS_10G_SERIAL));
+ hw->mac.cached_autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
ret_val = ixgbe_reset_pipeline_82599(hw);
if (got_lock) {
@@ -803,12 +803,9 @@ static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
bool autoneg_wait_to_complete)
{
s32 status = 0;
- u32 autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+ u32 autoc, pma_pmd_1g, link_mode, start_autoc;
u32 autoc2 = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
- u32 start_autoc = autoc;
u32 orig_autoc = 0;
- u32 link_mode = autoc & IXGBE_AUTOC_LMS_MASK;
- u32 pma_pmd_1g = autoc & IXGBE_AUTOC_1G_PMA_PMD_MASK;
u32 pma_pmd_10g_serial = autoc2 & IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_MASK;
u32 links_reg;
u32 i;
@@ -831,9 +828,14 @@ static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
/* Use stored value (EEPROM defaults) of AUTOC to find KR/KX4 support*/
if (hw->mac.orig_link_settings_stored)
- orig_autoc = hw->mac.orig_autoc;
+ autoc = hw->mac.orig_autoc;
else
- orig_autoc = autoc;
+ autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+
+ orig_autoc = autoc;
+ start_autoc = hw->mac.cached_autoc;
+ link_mode = autoc & IXGBE_AUTOC_LMS_MASK;
+ pma_pmd_1g = autoc & IXGBE_AUTOC_1G_PMA_PMD_MASK;
if (link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR ||
link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR_1G_AN ||
@@ -887,6 +889,7 @@ static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
/* Restart link */
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc);
+ hw->mac.cached_autoc = autoc;
ixgbe_reset_pipeline_82599(hw);
if (got_lock)
@@ -958,7 +961,7 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
{
ixgbe_link_speed link_speed;
s32 status;
- u32 ctrl, i, autoc, autoc2;
+ u32 ctrl, i, autoc2;
u32 curr_lms;
bool link_up = false;
@@ -991,8 +994,12 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
if (hw->phy.reset_disable == false && hw->phy.ops.reset != NULL)
hw->phy.ops.reset(hw);
- /* remember AUTOC LMS from before we reset */
- curr_lms = IXGBE_READ_REG(hw, IXGBE_AUTOC) & IXGBE_AUTOC_LMS_MASK;
+ /* remember AUTOC from before we reset */
+ if (hw->mac.cached_autoc)
+ curr_lms = hw->mac.cached_autoc & IXGBE_AUTOC_LMS_MASK;
+ else
+ curr_lms = IXGBE_READ_REG(hw, IXGBE_AUTOC) &
+ IXGBE_AUTOC_LMS_MASK;
mac_reset_top:
/*
@@ -1042,10 +1049,10 @@ mac_reset_top:
* stored off yet. Otherwise restore the stored original
* values since the reset operation sets back to defaults.
*/
- autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+ hw->mac.cached_autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
autoc2 = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
if (hw->mac.orig_link_settings_stored == false) {
- hw->mac.orig_autoc = autoc;
+ hw->mac.orig_autoc = hw->mac.cached_autoc;
hw->mac.orig_autoc2 = autoc2;
hw->mac.orig_link_settings_stored = true;
} else {
@@ -1062,7 +1069,7 @@ mac_reset_top:
(hw->mac.orig_autoc & ~IXGBE_AUTOC_LMS_MASK) |
curr_lms;
- if (autoc != hw->mac.orig_autoc) {
+ if (hw->mac.cached_autoc != hw->mac.orig_autoc) {
/* Need SW/FW semaphore around AUTOC writes if LESM is
* on, likewise reset_pipeline requires us to hold
* this lock as it also writes to AUTOC.
@@ -1078,6 +1085,7 @@ mac_reset_top:
}
IXGBE_WRITE_REG(hw, IXGBE_AUTOC, hw->mac.orig_autoc);
+ hw->mac.cached_autoc = hw->mac.orig_autoc;
ixgbe_reset_pipeline_82599(hw);
if (got_lock)
@@ -2181,7 +2189,7 @@ s32 ixgbe_reset_pipeline_82599(struct ixgbe_hw *hw)
s32 i, autoc_reg, ret_val;
s32 anlp1_reg = 0;
- autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+ autoc_reg = hw->mac.cached_autoc;
autoc_reg |= IXGBE_AUTOC_AN_RESTART;
/* Write AUTOC register with toggled LMS[2] bit and Restart_AN */
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 6d70665..7480f7b 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -2928,6 +2928,7 @@ struct ixgbe_mac_info {
u32 max_tx_queues;
u32 max_rx_queues;
u32 orig_autoc;
+ u32 cached_autoc;
u32 orig_autoc2;
bool orig_link_settings_stored;
bool autotry_restart;
--
1.7.11.7
--
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