diff options
| author | Michal Kalderon <michal.kalderon@marvell.com> | 2020-07-07 09:31:00 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2020-07-16 16:01:55 -0300 |
| commit | eb7f84e379daad69b4c92538baeaf93bbf493c14 (patch) | |
| tree | 3a581f348a5d17e2d84ad83e08530626924ef0b8 /drivers/infiniband/hw/qedr/verbs.c | |
| parent | bbe4f4245271bd0f21bf826996c0c5d87a3529c9 (diff) | |
| download | lwn-eb7f84e379daad69b4c92538baeaf93bbf493c14.tar.gz lwn-eb7f84e379daad69b4c92538baeaf93bbf493c14.zip | |
RDMA/qedr: Add EDPM max size to alloc ucontext response
User space should receive the maximum edpm size from kernel driver,
similar to other edpm/ldpm related limits. Add an additional parameter to
the alloc_ucontext_resp structure for the edpm maximum size.
In addition, pass an indication from user-space to kernel
(and not just kernel to user) that the DPM sizes are supported.
This is for supporting backward-forward compatibility between driver and
lib for everything related to DPM transaction and limit sizes.
This should have been part of commit mentioned in Fixes tag.
Link: https://lore.kernel.org/r/20200707063100.3811-3-michal.kalderon@marvell.com
Fixes: 93a3d05f9d68 ("RDMA/qedr: Add kernel capability flags for dpm enabled mode")
Signed-off-by: Ariel Elior <ariel.elior@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/qedr/verbs.c')
| -rw-r--r-- | drivers/infiniband/hw/qedr/verbs.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c index 5008149ea116..fcf2eaa3b459 100644 --- a/drivers/infiniband/hw/qedr/verbs.c +++ b/drivers/infiniband/hw/qedr/verbs.c @@ -320,9 +320,12 @@ int qedr_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata) QEDR_DPM_TYPE_ROCE_LEGACY | QEDR_DPM_TYPE_ROCE_EDPM_MODE; - uresp.dpm_flags |= QEDR_DPM_SIZES_SET; - uresp.ldpm_limit_size = QEDR_LDPM_MAX_SIZE; - uresp.edpm_trans_size = QEDR_EDPM_TRANS_SIZE; + if (ureq.context_flags & QEDR_SUPPORT_DPM_SIZES) { + uresp.dpm_flags |= QEDR_DPM_SIZES_SET; + uresp.ldpm_limit_size = QEDR_LDPM_MAX_SIZE; + uresp.edpm_trans_size = QEDR_EDPM_TRANS_SIZE; + uresp.edpm_limit_size = QEDR_EDPM_MAX_SIZE; + } uresp.wids_enabled = 1; uresp.wid_count = oparams.wid_count; |