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qcacmn: Add history for register write failure

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Maintain a history of the register writes which
have failed. The failure of register write is
determined by reading back the register after
writing a value to that register. If the read
value does not match the value which was written
then it is termed as a failed register write.

Change-Id: Ic3423c2cbd74bf498c0d3dd8ee7ce4231054541a
CRs-Fixed: 2624475
This commit is contained in:
Rakesh Pillai
2020-02-18 19:49:57 +05:30
committed by nshrivas
parent dfdfce1e58
commit 8e01014b7d
3 changed files with 97 additions and 7 deletions
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32
hal/wifi3.0/hal_api.h
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@@ -104,6 +104,30 @@ hal_set_verbose_debug(bool flag)
#define HAL_STATS_INC(_handle, _field, _delta)
#endif
#ifdef ENABLE_HAL_REG_WR_HISTORY
#define HAL_REG_WRITE_FAIL_HIST_ADD(hal_soc, offset, wr_val, rd_val) \
hal_reg_wr_fail_history_add(hal_soc, offset, wr_val, rd_val)
void hal_reg_wr_fail_history_add(struct hal_soc *hal_soc,
uint32_t offset,
uint32_t wr_val,
uint32_t rd_val);
static inline int hal_history_get_next_index(qdf_atomic_t *table_index,
int array_size)
{
int record_index = qdf_atomic_inc_return(table_index);
return record_index & (array_size - 1);
}
#else
#define HAL_REG_WRITE_FAIL_HIST_ADD(hal_soc, offset, wr_val, rd_val) \
hal_err("write failed at reg offset 0x%x, write 0x%x read 0x%x\n", \
offset, \
wr_val, \
rd_val)
#endif
/**
* hal_reg_write_result_check() - check register writing result
* @hal_soc: HAL soc handle
@@ -121,14 +145,8 @@ static inline void hal_reg_write_result_check(struct hal_soc *hal_soc,
value = qdf_ioread32(hal_soc->dev_base_addr + offset);
if (exp_val != value) {
QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_INFO_HIGH,
"register offset 0x%x write failed!\n", offset);
QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_INFO_HIGH,
"the expectation 0x%x, actual value 0x%x\n",
exp_val,
value);
HAL_REG_WRITE_FAIL_HIST_ADD(hal_soc, offset, exp_val, value);
HAL_STATS_INC(hal_soc, reg_write_fail, 1);
QDF_BUG(0);
}
}