AuxXxilium/linux_dsm_epyc7002
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qed: Mask parities after occurance

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Parities might exhibit a flood behavior since we re-enable the
attention line without preventing the parity from re-triggering the
assertion.
Mask the source in AEU until the parity would be handled.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mintz, Yuval 2017-05-29 09:53:13 +03:00 committed by David S. Miller
parent 6010179da3
commit 9790c35e96
1 changed files with 23 additions and 13 deletions
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36
drivers/net/ethernet/qlogic/qed/qed_int.c
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@ -793,16 +793,18 @@ qed_int_deassertion_aeu_bit(struct qed_hwfn *p_hwfn,
*
* @param p_hwfn
* @param p_aeu - descriptor of an AEU bit which caused the parity
* @param aeu_en_reg - address of the AEU enable register
* @param bit_index
*/
static void qed_int_deassertion_parity(struct qed_hwfn *p_hwfn,
struct aeu_invert_reg_bit *p_aeu,
u8 bit_index)
u32 aeu_en_reg, u8 bit_index)
{
u32 block_id = p_aeu->block_index;
u32 block_id = p_aeu->block_index, mask, val;
DP_INFO(p_hwfn->cdev, "%s[%d] parity attention is set\n",
p_aeu->bit_name, bit_index);
DP_NOTICE(p_hwfn->cdev,
"%s parity attention is set [address 0x%08x, bit %d]\n",
p_aeu->bit_name, aeu_en_reg, bit_index);
if (block_id != MAX_BLOCK_ID) {
qed_int_attn_print(p_hwfn, block_id, ATTN_TYPE_PARITY, false);
@ -815,6 +817,13 @@ static void qed_int_deassertion_parity(struct qed_hwfn *p_hwfn,
ATTN_TYPE_PARITY, false);
}
}
/* Prevent this parity error from being re-asserted */
mask = ~BIT(bit_index);
val = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg);
qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg, val & mask);
DP_INFO(p_hwfn, "`%s' - Disabled future parity errors\n",
p_aeu->bit_name);
}
/**
@ -829,7 +838,7 @@ static int qed_int_deassertion(struct qed_hwfn *p_hwfn,
u16 deasserted_bits)
{
struct qed_sb_attn_info *sb_attn_sw = p_hwfn->p_sb_attn;
u32 aeu_inv_arr[NUM_ATTN_REGS], aeu_mask;
u32 aeu_inv_arr[NUM_ATTN_REGS], aeu_mask, aeu_en, en;
u8 i, j, k, bit_idx;
int rc = 0;
@ -846,11 +855,11 @@ static int qed_int_deassertion(struct qed_hwfn *p_hwfn,
/* Find parity attentions first */
for (i = 0; i < NUM_ATTN_REGS; i++) {
struct aeu_invert_reg *p_aeu = &sb_attn_sw->p_aeu_desc[i];
u32 en = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
MISC_REG_AEU_ENABLE1_IGU_OUT_0 +
i * sizeof(u32));
u32 parities;
aeu_en = MISC_REG_AEU_ENABLE1_IGU_OUT_0 + i * sizeof(u32);
en = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en);
/* Skip register in which no parity bit is currently set */
parities = sb_attn_sw->parity_mask[i] & aeu_inv_arr[i] & en;
if (!parities)
@ -862,7 +871,7 @@ static int qed_int_deassertion(struct qed_hwfn *p_hwfn,
if (qed_int_is_parity_flag(p_hwfn, p_bit) &&
!!(parities & BIT(bit_idx)))
qed_int_deassertion_parity(p_hwfn, p_bit,
bit_idx);
aeu_en, bit_idx);
bit_idx += ATTENTION_LENGTH(p_bit->flags);
}
@ -877,10 +886,11 @@ static int qed_int_deassertion(struct qed_hwfn *p_hwfn,
continue;
for (i = 0; i < NUM_ATTN_REGS; i++) {
u32 aeu_en = MISC_REG_AEU_ENABLE1_IGU_OUT_0 +
i * sizeof(u32) +
k * sizeof(u32) * NUM_ATTN_REGS;
u32 en, bits;
u32 bits;
aeu_en = MISC_REG_AEU_ENABLE1_IGU_OUT_0 +
i * sizeof(u32) +
k * sizeof(u32) * NUM_ATTN_REGS;
en = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en);
bits = aeu_inv_arr[i] & en;