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ixgbe: Check whether FDIRCMD writes actually complete 

Wait up to about 100 us for FDIRCMD writes to complete and return
failure indications.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Mark Rustad 2015-06-11 11:02:20 -07:00 committed by Jeff Kirsher
parent b5529ef5be
commit d490d15877
2 changed files with 40 additions and 24 deletions
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63
drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
View File

@ -1,7 +1,7 @@
/*******************************************************************************
Intel 10 Gigabit PCI Express Linux driver
Copyright(c) 1999 - 2014 Intel Corporation.
Copyright(c) 1999 - 2015 Intel Corporation.
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
@ -1241,6 +1241,25 @@ mac_reset_top:
return status;
}
/**
* ixgbe_fdir_check_cmd_complete - poll to check whether FDIRCMD is complete
* @hw: pointer to hardware structure
* @fdircmd: current value of FDIRCMD register
*/
static s32 ixgbe_fdir_check_cmd_complete(struct ixgbe_hw *hw, u32 *fdircmd)
{
int i;
for (i = 0; i < IXGBE_FDIRCMD_CMD_POLL; i++) {
*fdircmd = IXGBE_READ_REG(hw, IXGBE_FDIRCMD);
if (!(*fdircmd & IXGBE_FDIRCMD_CMD_MASK))
return 0;
udelay(10);
}
return IXGBE_ERR_FDIR_CMD_INCOMPLETE;
}
/**
* ixgbe_reinit_fdir_tables_82599 - Reinitialize Flow Director tables.
* @hw: pointer to hardware structure
@ -1249,6 +1268,8 @@ s32 ixgbe_reinit_fdir_tables_82599(struct ixgbe_hw *hw)
{
int i;
u32 fdirctrl = IXGBE_READ_REG(hw, IXGBE_FDIRCTRL);
u32 fdircmd;
s32 err;
fdirctrl &= ~IXGBE_FDIRCTRL_INIT_DONE;
@ -1256,15 +1277,10 @@ s32 ixgbe_reinit_fdir_tables_82599(struct ixgbe_hw *hw)
* Before starting reinitialization process,
* FDIRCMD.CMD must be zero.
*/
for (i = 0; i < IXGBE_FDIRCMD_CMD_POLL; i++) {
if (!(IXGBE_READ_REG(hw, IXGBE_FDIRCMD) &
IXGBE_FDIRCMD_CMD_MASK))
break;
udelay(10);
}
if (i >= IXGBE_FDIRCMD_CMD_POLL) {
hw_dbg(hw, "Flow Director previous command isn't complete, aborting table re-initialization.\n");
return IXGBE_ERR_FDIR_REINIT_FAILED;
err = ixgbe_fdir_check_cmd_complete(hw, &fdircmd);
if (err) {
hw_dbg(hw, "Flow Director previous command did not complete, aborting table re-initialization.\n");
return err;
}
IXGBE_WRITE_REG(hw, IXGBE_FDIRFREE, 0);
@ -1754,6 +1770,7 @@ s32 ixgbe_fdir_write_perfect_filter_82599(struct ixgbe_hw *hw,
u16 soft_id, u8 queue)
{
u32 fdirport, fdirvlan, fdirhash, fdircmd;
s32 err;
/* currently IPv6 is not supported, must be programmed with 0 */
IXGBE_WRITE_REG_BE32(hw, IXGBE_FDIRSIPv6(0),
@ -1802,6 +1819,11 @@ s32 ixgbe_fdir_write_perfect_filter_82599(struct ixgbe_hw *hw,
fdircmd |= (u32)input->formatted.vm_pool << IXGBE_FDIRCMD_VT_POOL_SHIFT;
IXGBE_WRITE_REG(hw, IXGBE_FDIRCMD, fdircmd);
err = ixgbe_fdir_check_cmd_complete(hw, &fdircmd);
if (err) {
hw_dbg(hw, "Flow Director command did not complete!\n");
return err;
}
return 0;
}
@ -1811,9 +1833,8 @@ s32 ixgbe_fdir_erase_perfect_filter_82599(struct ixgbe_hw *hw,
u16 soft_id)
{
u32 fdirhash;
u32 fdircmd = 0;
u32 retry_count;
s32 err = 0;
u32 fdircmd;
s32 err;
/* configure FDIRHASH register */
fdirhash = input->formatted.bkt_hash;
@ -1826,18 +1847,12 @@ s32 ixgbe_fdir_erase_perfect_filter_82599(struct ixgbe_hw *hw,
/* Query if filter is present */
IXGBE_WRITE_REG(hw, IXGBE_FDIRCMD, IXGBE_FDIRCMD_CMD_QUERY_REM_FILT);
for (retry_count = 10; retry_count; retry_count--) {
/* allow 10us for query to process */
udelay(10);
/* verify query completed successfully */
fdircmd = IXGBE_READ_REG(hw, IXGBE_FDIRCMD);
if (!(fdircmd & IXGBE_FDIRCMD_CMD_MASK))
break;
err = ixgbe_fdir_check_cmd_complete(hw, &fdircmd);
if (err) {
hw_dbg(hw, "Flow Director command did not complete!\n");
return err;
}
if (!retry_count)
err = IXGBE_ERR_FDIR_REINIT_FAILED;
/* if filter exists in hardware then remove it */
if (fdircmd & IXGBE_FDIRCMD_FILTER_VALID) {
IXGBE_WRITE_REG(hw, IXGBE_FDIRHASH, fdirhash);
@ -1846,7 +1861,7 @@ s32 ixgbe_fdir_erase_perfect_filter_82599(struct ixgbe_hw *hw,
IXGBE_FDIRCMD_CMD_REMOVE_FLOW);
}
return err;
return 0;
}
/**

1
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
View File

@ -3460,6 +3460,7 @@ struct ixgbe_info {
#define IXGBE_ERR_PBA_SECTION -31
#define IXGBE_ERR_INVALID_ARGUMENT -32
#define IXGBE_ERR_HOST_INTERFACE_COMMAND -33
#define IXGBE_ERR_FDIR_CMD_INCOMPLETE -38
#define IXGBE_NOT_IMPLEMENTED 0x7FFFFFFF
#define IXGBE_KRM_PORT_CAR_GEN_CTRL(P) ((P) ? 0x8010 : 0x4010)