5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shravan Kumar Ramani <shravankr@xxxxxxxxxx>
[ Upstream commit 0f5969452e162efc50bdc98968fb62b424a9874b ]
This fix involves 2 changes:
- All event regs have a reset value of 0, which is not a valid
event_number as per the event_list for most blocks and hence seen
as an error. Add a "disable" event with event_number 0 for all blocks.
- The enable bit for each counter need not be checked before
reading the event info, and hence removed.
Fixes: 1a218d312e65 ("platform/mellanox: mlxbf-pmc: Add Mellanox BlueField PMC driver")
Signed-off-by: Shravan Kumar Ramani <shravankr@xxxxxxxxxx>
Reviewed-by: Vadim Pasternak <vadimp@xxxxxxxxxx>
Reviewed-by: David Thompson <davthompson@xxxxxxxxxx>
Link: https://lore.kernel.org/r/04d0213932d32681de1c716b54320ed894e52425.1693917738.git.shravankr@xxxxxxxxxx
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/platform/mellanox/mlxbf-pmc.c | 27 +++++++--------------------
1 file changed, 7 insertions(+), 20 deletions(-)
diff --git a/drivers/platform/mellanox/mlxbf-pmc.c b/drivers/platform/mellanox/mlxbf-pmc.c
index 95afcae7b9fa9..2d4bbe99959ef 100644
--- a/drivers/platform/mellanox/mlxbf-pmc.c
+++ b/drivers/platform/mellanox/mlxbf-pmc.c
@@ -191,6 +191,7 @@ static const struct mlxbf_pmc_events mlxbf_pmc_smgen_events[] = {
};
static const struct mlxbf_pmc_events mlxbf_pmc_trio_events_1[] = {
+ { 0x0, "DISABLE" },
{ 0xa0, "TPIO_DATA_BEAT" },
{ 0xa1, "TDMA_DATA_BEAT" },
{ 0xa2, "MAP_DATA_BEAT" },
@@ -214,6 +215,7 @@ static const struct mlxbf_pmc_events mlxbf_pmc_trio_events_1[] = {
};
static const struct mlxbf_pmc_events mlxbf_pmc_trio_events_2[] = {
+ { 0x0, "DISABLE" },
{ 0xa0, "TPIO_DATA_BEAT" },
{ 0xa1, "TDMA_DATA_BEAT" },
{ 0xa2, "MAP_DATA_BEAT" },
@@ -246,6 +248,7 @@ static const struct mlxbf_pmc_events mlxbf_pmc_trio_events_2[] = {
};
static const struct mlxbf_pmc_events mlxbf_pmc_ecc_events[] = {
+ { 0x0, "DISABLE" },
{ 0x100, "ECC_SINGLE_ERROR_CNT" },
{ 0x104, "ECC_DOUBLE_ERROR_CNT" },
{ 0x114, "SERR_INJ" },
@@ -258,6 +261,7 @@ static const struct mlxbf_pmc_events mlxbf_pmc_ecc_events[] = {
};
static const struct mlxbf_pmc_events mlxbf_pmc_mss_events[] = {
+ { 0x0, "DISABLE" },
{ 0xc0, "RXREQ_MSS" },
{ 0xc1, "RXDAT_MSS" },
{ 0xc2, "TXRSP_MSS" },
@@ -265,6 +269,7 @@ static const struct mlxbf_pmc_events mlxbf_pmc_mss_events[] = {
};
static const struct mlxbf_pmc_events mlxbf_pmc_hnf_events[] = {
+ { 0x0, "DISABLE" },
{ 0x45, "HNF_REQUESTS" },
{ 0x46, "HNF_REJECTS" },
{ 0x47, "ALL_BUSY" },
@@ -323,6 +328,7 @@ static const struct mlxbf_pmc_events mlxbf_pmc_hnf_events[] = {
};
static const struct mlxbf_pmc_events mlxbf_pmc_hnfnet_events[] = {
+ { 0x0, "DISABLE" },
{ 0x12, "CDN_REQ" },
{ 0x13, "DDN_REQ" },
{ 0x14, "NDN_REQ" },
@@ -892,7 +898,7 @@ static int mlxbf_pmc_read_event(int blk_num, uint32_t cnt_num, bool is_l3,
uint64_t *result)
{
uint32_t perfcfg_offset, perfval_offset;
- uint64_t perfmon_cfg, perfevt, perfctl;
+ uint64_t perfmon_cfg, perfevt;
if (cnt_num >= pmc->block[blk_num].counters)
return -EINVAL;
@@ -904,25 +910,6 @@ static int mlxbf_pmc_read_event(int blk_num, uint32_t cnt_num, bool is_l3,
perfval_offset = perfcfg_offset +
pmc->block[blk_num].counters * MLXBF_PMC_REG_SIZE;
- /* Set counter in "read" mode */
- perfmon_cfg = FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_ADDR,
- MLXBF_PMC_PERFCTL);
- perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_STROBE, 1);
- perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WR_R_B, 0);
-
- if (mlxbf_pmc_write(pmc->block[blk_num].mmio_base + perfcfg_offset,
- MLXBF_PMC_WRITE_REG_64, perfmon_cfg))
- return -EFAULT;
-
- /* Check if the counter is enabled */
-
- if (mlxbf_pmc_read(pmc->block[blk_num].mmio_base + perfval_offset,
- MLXBF_PMC_READ_REG_64, &perfctl))
- return -EFAULT;
-
- if (!FIELD_GET(MLXBF_PMC_PERFCTL_EN0, perfctl))
- return -EINVAL;
-
/* Set counter in "read" mode */
perfmon_cfg = FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_ADDR,
MLXBF_PMC_PERFEVT);
--
2.40.1
