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IB/hfi1: List all receive contexts from debugfs 

The current debugfs output for receive contexts (rcds), stops after the
kernel receive contexts have been displayed.  This is not enough
information to fully diagnose packet drops.

Display all of the receive contexts.

Augment the output with some more context information.

Limit the ring buffer header output to 5 entries to avoid overextending
the sequential file output.

Fixes: bf808b5039 ("IB/hfi1: Add kernel receive context info to debugfs")
Link: https://lore.kernel.org/r/20191219211928.58387.20737.stgit@awfm-01.aw.intel.com
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Michael J. Ruhl 2019-12-19 16:19:28 -05:00 committed by Jason Gunthorpe
parent 2fb3b5ae1c
commit 44ec5aa3c6
2 changed files with 10 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/hw/hfi1/debugfs.c
View File

@ -379,7 +379,7 @@ static void *_rcds_seq_next(struct seq_file *s, void *v, loff_t *pos)
struct hfi1_devdata *dd = dd_from_dev(ibd);
++*pos;
if (!dd->rcd || *pos >= dd->n_krcv_queues)
if (!dd->rcd || *pos >= dd->num_rcv_contexts)
return NULL;
return pos;
}

12
drivers/infiniband/hw/hfi1/driver.c
View File

@ -1726,23 +1726,29 @@ static int process_receive_invalid(struct hfi1_packet *packet)
return RHF_RCV_CONTINUE;
}
#define HFI1_RCVHDR_DUMP_MAX 5
void seqfile_dump_rcd(struct seq_file *s, struct hfi1_ctxtdata *rcd)
{
struct hfi1_packet packet;
struct ps_mdata mdata;
int i;
seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s head %llu tail %llu\n",
seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s ctrl 0x%08llx status 0x%08llx, head %llu tail %llu sw head %u\n",
rcd->ctxt, get_hdrq_cnt(rcd), get_hdrqentsize(rcd),
get_dma_rtail_setting(rcd) ?
"dma_rtail" : "nodma_rtail",
read_kctxt_csr(rcd->dd, rcd->ctxt, RCV_CTXT_CTRL),
read_kctxt_csr(rcd->dd, rcd->ctxt, RCV_CTXT_STATUS),
read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD) &
RCV_HDR_HEAD_HEAD_MASK,
read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL));
read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL),
rcd->head);
init_packet(rcd, &packet);
init_ps_mdata(&mdata, &packet);
while (1) {
for (i = 0; i < HFI1_RCVHDR_DUMP_MAX; i++) {
__le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
rcd->rhf_offset;
struct ib_header *hdr;