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Increase negotiation polling period from 10ms to 100ms.

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There is no big need to burn CPU if other side may be not there yet.  For
example, the PLX hardware by default enables the NTB link up on reset, not
dependig on driver to do it.  In case of Intel hardware this also reduces
race between MSI-X workaround negotiation and upper layers, using the same
scratchpad registers in different time.

MFC after:	12 days
This commit is contained in:
Alexander Motin 2017-09-02 13:28:45 +00:00
parent 3990853d71
commit 3dcd9d784a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=323128
2 changed files with 2 additions and 2 deletions
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2
sys/dev/ntb/ntb_hw/ntb_hw_intel.c
View File

@ -2689,7 +2689,7 @@ intel_ntb_exchange_msix(void *ctx)
ntb->lnk_sta = pci_read_config(ntb->device, ntb->reg->lnk_sta, 2);
if (_xeon_link_is_up(ntb)) {
callout_reset(&ntb->peer_msix_work,
hz * (ntb->peer_msix_good ? 2 : 1) / 100,
hz * (ntb->peer_msix_good ? 2 : 1) / 10,
intel_ntb_exchange_msix, ntb);
} else
intel_ntb_spad_clear(ntb->device);

2
sys/dev/ntb/ntb_transport.c
View File

@ -250,7 +250,7 @@ enum {
#define QP_TO_MW(nt, qp) ((qp) % nt->mw_count)
#define NTB_QP_DEF_NUM_ENTRIES 100
#define NTB_LINK_DOWN_TIMEOUT 10
#define NTB_LINK_DOWN_TIMEOUT 100
static int ntb_transport_probe(device_t dev);
static int ntb_transport_attach(device_t dev);