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mlx5-updates-2018-03-27 (Misc updates & SQ recovery)

Browse source 
This series contains Misc updates and cleanups for mlx5e rx path
 and SQ recovery feature for tx path.
 
 From Tariq: (RX updates)
     - Disable Striding RQ when PCI devices, striding RQ limits the use
       of CQE compression feature, which is very critical for slow PCI
       devices performance, in this change we will prefer CQE compression
       over Striding RQ only on specific "slow"  PCIe links.
     - RX path cleanups
     - Private flag to enable/disable striding RQ
 
 From Eran: (TX fast recovery)
     - TX timeout logic improvements, fast SQ recovery and TX error reporting
       if a HW error occurs while transmitting on a specific SQ, the driver will
       ignore such error and will wait for TX timeout to occur and reset all
       the rings. Instead, the current series improves the resiliency for such
       HW errors by detecting TX completions with errors, which will report them
       and perform a fast recover for the specific faulty SQ even before a TX
       timeout is detected.
 
 Thanks,
 Saeed.
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Merge tag 'mlx5-updates-2018-03-27' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2018-03-27 (Misc updates & SQ recovery)

This series contains Misc updates and cleanups for mlx5e rx path
and SQ recovery feature for tx path.

From Tariq: (RX updates)
    - Disable Striding RQ when PCI devices, striding RQ limits the use
      of CQE compression feature, which is very critical for slow PCI
      devices performance, in this change we will prefer CQE compression
      over Striding RQ only on specific "slow"  PCIe links.
    - RX path cleanups
    - Private flag to enable/disable striding RQ

From Eran: (TX fast recovery)
    - TX timeout logic improvements, fast SQ recovery and TX error reporting
      if a HW error occurs while transmitting on a specific SQ, the driver will
      ignore such error and will wait for TX timeout to occur and reset all
      the rings. Instead, the current series improves the resiliency for such
      HW errors by detecting TX completions with errors, which will report them
      and perform a fast recover for the specific faulty SQ even before a TX
      timeout is detected.
====================

Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
David S. Miller 2018-03-29 14:01:40 -04:00
commit 6e2135ce54
15 changed files with 368 additions and 162 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/infiniband/hw/mlx5/cq.c
View file

@ -267,14 +267,8 @@ static void handle_responder(struct ib_wc *wc, struct mlx5_cqe64 *cqe,
static void dump_cqe(struct mlx5_ib_dev *dev, struct mlx5_err_cqe *cqe)
{
__be32 *p = (__be32 *)cqe;
int i;
mlx5_ib_warn(dev, "dump error cqe\n");
for (i = 0; i < sizeof(*cqe) / 16; i++, p += 4)
pr_info("%08x %08x %08x %08x\n", be32_to_cpu(p[0]),
be32_to_cpu(p[1]), be32_to_cpu(p[2]),
be32_to_cpu(p[3]));
mlx5_dump_err_cqe(dev->mdev, cqe);
}
static void mlx5_handle_error_cqe(struct mlx5_ib_dev *dev,

14
drivers/infiniband/hw/mlx5/qp.c
View file

@ -4739,26 +4739,14 @@ static int query_raw_packet_qp_sq_state(struct mlx5_ib_dev *dev,
struct mlx5_ib_sq *sq,
u8 *sq_state)
{
void *out;
void *sqc;
int inlen;
int err;
inlen = MLX5_ST_SZ_BYTES(query_sq_out);
out = kvzalloc(inlen, GFP_KERNEL);
if (!out)
return -ENOMEM;
err = mlx5_core_query_sq(dev->mdev, sq->base.mqp.qpn, out);
err = mlx5_core_query_sq_state(dev->mdev, sq->base.mqp.qpn, sq_state);
if (err)
goto out;
sqc = MLX5_ADDR_OF(query_sq_out, out, sq_context);
*sq_state = MLX5_GET(sqc, sqc, state);
sq->state = *sq_state;
out:
kvfree(out);
return err;
}