[PATCH 6.4 270/800] RDMA/bnxt_re: Use unique names while registering interrupts

Greg Kroah-Hartman
2023-07-16T20:05:30Z

From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>

[ Upstream commit ff2e4bfd162cf66a112a81509e419805add44d64 ]

bnxt_re currently uses the names "bnxt_qplib_creq" and "bnxt_qplib_nq-0"
while registering IRQs. There is no way to distinguish the IRQs of
different device ports when there are multiple IB devices registered.
This could make the scenarios worse where one want to pin IRQs of a device
port to certain CPUs.

Fixed the code to use unique names which has PCI BDF information while
registering interrupts like: "bnxt_re-nq-0@pci:0000:65:00.0" and
"bnxt_re-creq@pci:0000:65:00.1".

Fixes: 1ac5a4047975 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Link: https://lore.kernel.org/r/1684478897-12247-4-git-send-email-selvin.xavier@broadcom.com
Reviewed-by: Bhargava Chenna Marreddy <bhargava.marreddy@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/hw/bnxt_re/qplib_fp.c | 12 ++++++++++--
drivers/infiniband/hw/bnxt_re/qplib_fp.h | 2 +-
drivers/infiniband/hw/bnxt_re/qplib_rcfw.c | 15 +++++++++++++--
drivers/infiniband/hw/bnxt_re/qplib_rcfw.h | 1 +
4 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index 3c4a3bb1010e0..607ed69386b45 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -412,6 +412,8 @@ void bnxt_qplib_nq_stop_irq(struct bnxt_qplib_nq *nq, bool kill)

irq_set_affinity_hint(nq->msix_vec, NULL);
free_irq(nq->msix_vec, nq);
+ kfree(nq->name);
+ nq->name = NULL;
nq->requested = false;
}

@@ -438,6 +440,7 @@ void bnxt_qplib_disable_nq(struct bnxt_qplib_nq *nq)
int bnxt_qplib_nq_start_irq(struct bnxt_qplib_nq *nq, int nq_indx,
int msix_vector, bool need_init)
{
+ struct bnxt_qplib_res *res = nq->res;
int rc;

if (nq->requested)
@@ -449,9 +452,14 @@ int bnxt_qplib_nq_start_irq(struct bnxt_qplib_nq *nq, int nq_indx,
else
tasklet_enable(&nq->nq_tasklet);

- snprintf(nq->name, sizeof(nq->name), "bnxt_qplib_nq-%d", nq_indx);
+ nq->name = kasprintf(GFP_KERNEL, "bnxt_re-nq-%d@pci:%s",
+ nq_indx, pci_name(res->pdev));
+ if (!nq->name)
+ return -ENOMEM;
rc = request_irq(nq->msix_vec, bnxt_qplib_nq_irq, 0, nq->name, nq);
if (rc) {
+ kfree(nq->name);
+ nq->name = NULL;
tasklet_disable(&nq->nq_tasklet);
return rc;
}
@@ -465,7 +473,7 @@ int bnxt_qplib_nq_start_irq(struct bnxt_qplib_nq *nq, int nq_indx,
nq->msix_vec, nq_indx);
}
nq->requested = true;
- bnxt_qplib_ring_nq_db(&nq->nq_db.dbinfo, nq->res->cctx, true);
+ bnxt_qplib_ring_nq_db(&nq->nq_db.dbinfo, res->cctx, true);

return rc;
}
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.h b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
index d74d5ead2e32a..a42820821c473 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
@@ -472,7 +472,7 @@ typedef int (*srqn_handler_t)(struct bnxt_qplib_nq *nq,
struct bnxt_qplib_nq {
struct pci_dev *pdev;
struct bnxt_qplib_res *res;
- char name[32];
+ char *name;
struct bnxt_qplib_hwq hwq;
struct bnxt_qplib_nq_db nq_db;
u16 ring_id;
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
index a668f877a7bf7..688eaa01db649 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
@@ -649,6 +649,8 @@ void bnxt_qplib_rcfw_stop_irq(struct bnxt_qplib_rcfw *rcfw, bool kill)
tasklet_kill(&creq->creq_tasklet);

free_irq(creq->msix_vec, rcfw);
+ kfree(creq->irq_name);
+ creq->irq_name = NULL;
creq->requested = false;
}

@@ -681,9 +683,11 @@ int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector,
bool need_init)
{
struct bnxt_qplib_creq_ctx *creq;
+ struct bnxt_qplib_res *res;
int rc;

creq = &rcfw->creq;
+ res = rcfw->res;

if (creq->requested)
return -EFAULT;
@@ -693,15 +697,22 @@ int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector,
tasklet_setup(&creq->creq_tasklet, bnxt_qplib_service_creq);
else
tasklet_enable(&creq->creq_tasklet);
+
+ creq->irq_name = kasprintf(GFP_KERNEL, "bnxt_re-creq@pci:%s",
+ pci_name(res->pdev));
+ if (!creq->irq_name)
+ return -ENOMEM;
rc = request_irq(creq->msix_vec, bnxt_qplib_creq_irq, 0,
- "bnxt_qplib_creq", rcfw);
+ creq->irq_name, rcfw);
if (rc) {
+ kfree(creq->irq_name);
+ creq->irq_name = NULL;
tasklet_disable(&creq->creq_tasklet);
return rc;
}
creq->requested = true;

- bnxt_qplib_ring_nq_db(&creq->creq_db.dbinfo, rcfw->res->cctx, true);
+ bnxt_qplib_ring_nq_db(&creq->creq_db.dbinfo, res->cctx, true);

return 0;
}
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
index dd5651478bbb7..92f7a25533d3b 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
@@ -186,6 +186,7 @@ struct bnxt_qplib_creq_ctx {
u16 ring_id;
int msix_vec;
bool requested; /*irq handler installed */
+ char *irq_name;
};

/* RCFW Communication Channels */
--
2.39.2