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i40iw: Improve CQP timeout logic

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The current timeout logic for Control Queue-Pair (CQP) OPs
does not take into account whether CQP makes progress but
rather blindly waits for a large timeout value, 100000 jiffies
for the completion event. Improve this by setting the timeout
based on whether the CQP is making progress or not. If the CQP
is hung, the timeout will happen sooner, in 5000 jiffies. Each
time the CQP progress is detetcted, the timeout extends by 5000
jiffies.

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Christopher N Bednarz <christopher.n.bednarz@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Shiraz Saleem
2017-08-08 20:38:45 -05:00
committed by Doug Ledford
parent bf808b5039
commit d26875b43d
4 changed files with 39 additions and 13 deletions
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11
drivers/infiniband/hw/i40iw/i40iw_ctrl.c
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@@ -54,6 +54,17 @@ static inline void i40iw_insert_wqe_hdr(u64 *wqe, u64 header)
set_64bit_val(wqe, 24, header);
}
void i40iw_check_cqp_progress(struct i40iw_cqp_timeout *cqp_timeout, struct i40iw_sc_dev *dev)
{
if (cqp_timeout->compl_cqp_cmds != dev->cqp_cmd_stats[OP_COMPLETED_COMMANDS]) {
cqp_timeout->compl_cqp_cmds = dev->cqp_cmd_stats[OP_COMPLETED_COMMANDS];
cqp_timeout->count = 0;
} else {
if (dev->cqp_cmd_stats[OP_REQUESTED_COMMANDS] != cqp_timeout->compl_cqp_cmds)
cqp_timeout->count++;
}
}
/**
* i40iw_get_cqp_reg_info - get head and tail for cqp using registers
* @cqp: struct for cqp hw