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RDMA/hfi1: Defer setting VL15 credits to link-up interrupt

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Keep VL15 credits at 0 during LNI, before link-up. Store
VL15 credits value during verify cap interrupt and set
in after link-up. This addresses an issue where VL15 MAD
packets could be sent by one side of the link before
the other side is ready to receive them.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Byczkowski, Jakub
2017-05-12 09:01:37 -07:00
committed by Doug Ledford
parent e4785b0633
commit b3e6b4bdbb
4 changed files with 64 additions and 19 deletions
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11
drivers/infiniband/hw/hfi1/hfi.h
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@@ -1045,6 +1045,14 @@ struct hfi1_devdata {
/* initial vl15 credits to use */
u16 vl15_init;
/*
* Cached value for vl15buf, read during verify cap interrupt. VL15
* credits are to be kept at 0 and set when handling the link-up
* interrupt. This removes the possibility of receiving VL15 MAD
* packets before this HFI is ready.
*/
u16 vl15buf_cached;
/* Misc small ints */
u8 n_krcv_queues;
u8 qos_shift;
@@ -1598,7 +1606,8 @@ int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encode);
int fm_get_table(struct hfi1_pportdata *ppd, int which, void *t);
int fm_set_table(struct hfi1_pportdata *ppd, int which, void *t);
void set_up_vl15(struct hfi1_devdata *dd, u8 vau, u16 vl15buf);
void set_up_vau(struct hfi1_devdata *dd, u8 vau);
void set_up_vl15(struct hfi1_devdata *dd, u16 vl15buf);
void reset_link_credits(struct hfi1_devdata *dd);
void assign_remote_cm_au_table(struct hfi1_devdata *dd, u8 vcu);