* [PATCH rdma-next] RDMA/counter: Combine allocation and bind logic
@ 2020-11-15 9:34 Leon Romanovsky
2020-11-15 13:36 ` Leon Romanovsky
0 siblings, 1 reply; 2+ messages in thread
From: Leon Romanovsky @ 2020-11-15 9:34 UTC (permalink / raw)
To: Doug Ledford, Jason Gunthorpe; +Cc: Leon Romanovsky, linux-rdma
From: Leon Romanovsky <leonro@nvidia.com>
RDMA counters are allocated and bounded to QP immediately after that.
Only after this two step process they are really usable. By combining
the logic, we are ensuring that once counter is returned to the caller,
it will have everything set.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
drivers/infiniband/core/counters.c | 130 +++++++++++++----------------
1 file changed, 58 insertions(+), 72 deletions(-)
diff --git a/drivers/infiniband/core/counters.c b/drivers/infiniband/core/counters.c
index e4ff0d3328b6..4e1ec4479e0b 100644
--- a/drivers/infiniband/core/counters.c
+++ b/drivers/infiniband/core/counters.c
@@ -64,8 +64,40 @@ int rdma_counter_set_auto_mode(struct ib_device *dev, u8 port,
return ret;
}
-static struct rdma_counter *rdma_counter_alloc(struct ib_device *dev, u8 port,
- enum rdma_nl_counter_mode mode)
+static void auto_mode_init_counter(struct rdma_counter *counter,
+ const struct ib_qp *qp,
+ enum rdma_nl_counter_mask new_mask)
+{
+ struct auto_mode_param *param = &counter->mode.param;
+
+ counter->mode.mode = RDMA_COUNTER_MODE_AUTO;
+ counter->mode.mask = new_mask;
+
+ if (new_mask & RDMA_COUNTER_MASK_QP_TYPE)
+ param->qp_type = qp->qp_type;
+}
+
+static int __rdma_counter_bind_qp(struct rdma_counter *counter,
+ struct ib_qp *qp)
+{
+ int ret;
+
+ if (qp->counter)
+ return -EINVAL;
+
+ if (!qp->device->ops.counter_bind_qp)
+ return -EOPNOTSUPP;
+
+ mutex_lock(&counter->lock);
+ ret = qp->device->ops.counter_bind_qp(counter, qp);
+ mutex_unlock(&counter->lock);
+
+ return ret;
+}
+
+static struct rdma_counter *alloc_and_bind(struct ib_device *dev, u8 port,
+ struct ib_qp *qp,
+ enum rdma_nl_counter_mode mode)
{
struct rdma_port_counter *port_counter;
struct rdma_counter *counter;
@@ -88,11 +120,19 @@ static struct rdma_counter *rdma_counter_alloc(struct ib_device *dev, u8 port,
port_counter = &dev->port_data[port].port_counter;
mutex_lock(&port_counter->lock);
- if (mode == RDMA_COUNTER_MODE_MANUAL) {
+ switch (mode) {
+ case RDMA_COUNTER_MODE_MANUAL:
ret = __counter_set_mode(&port_counter->mode,
RDMA_COUNTER_MODE_MANUAL, 0);
if (ret)
goto err_mode;
+ break;
+ case RDMA_COUNTER_MODE_AUTO:
+ auto_mode_init_counter(counter, qp, port_counter->mode.mask);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ goto err_mode;
}
port_counter->num_counters++;
@@ -102,6 +142,12 @@ static struct rdma_counter *rdma_counter_alloc(struct ib_device *dev, u8 port,
kref_init(&counter->kref);
mutex_init(&counter->lock);
+ ret = __rdma_counter_bind_qp(counter, qp);
+ if (ret)
+ goto err_mode;
+
+ rdma_restrack_parent_name(&counter->res, &qp->res);
+ rdma_restrack_add(&counter->res);
return counter;
err_mode:
@@ -132,19 +178,6 @@ static void rdma_counter_free(struct rdma_counter *counter)
kfree(counter);
}
-static void auto_mode_init_counter(struct rdma_counter *counter,
- const struct ib_qp *qp,
- enum rdma_nl_counter_mask new_mask)
-{
- struct auto_mode_param *param = &counter->mode.param;
-
- counter->mode.mode = RDMA_COUNTER_MODE_AUTO;
- counter->mode.mask = new_mask;
-
- if (new_mask & RDMA_COUNTER_MASK_QP_TYPE)
- param->qp_type = qp->qp_type;
-}
-
static bool auto_mode_match(struct ib_qp *qp, struct rdma_counter *counter,
enum rdma_nl_counter_mask auto_mask)
{
@@ -161,24 +194,6 @@ static bool auto_mode_match(struct ib_qp *qp, struct rdma_counter *counter,
return match;
}
-static int __rdma_counter_bind_qp(struct rdma_counter *counter,
- struct ib_qp *qp)
-{
- int ret;
-
- if (qp->counter)
- return -EINVAL;
-
- if (!qp->device->ops.counter_bind_qp)
- return -EOPNOTSUPP;
-
- mutex_lock(&counter->lock);
- ret = qp->device->ops.counter_bind_qp(counter, qp);
- mutex_unlock(&counter->lock);
-
- return ret;
-}
-
static int __rdma_counter_unbind_qp(struct ib_qp *qp)
{
struct rdma_counter *counter = qp->counter;
@@ -247,13 +262,6 @@ static struct rdma_counter *rdma_get_counter_auto_mode(struct ib_qp *qp,
return counter;
}
-static void rdma_counter_res_add(struct rdma_counter *counter,
- struct ib_qp *qp)
-{
- rdma_restrack_parent_name(&counter->res, &qp->res);
- rdma_restrack_add(&counter->res);
-}
-
static void counter_release(struct kref *kref)
{
struct rdma_counter *counter;
@@ -293,19 +301,9 @@ int rdma_counter_bind_qp_auto(struct ib_qp *qp, u8 port)
return ret;
}
} else {
- counter = rdma_counter_alloc(dev, port, RDMA_COUNTER_MODE_AUTO);
+ counter = alloc_and_bind(dev, port, qp, RDMA_COUNTER_MODE_AUTO);
if (!counter)
return -ENOMEM;
-
- auto_mode_init_counter(counter, qp, port_counter->mode.mask);
-
- ret = __rdma_counter_bind_qp(counter, qp);
- if (ret) {
- rdma_counter_free(counter);
- return ret;
- }
-
- rdma_counter_res_add(counter, qp);
}
return 0;
@@ -419,15 +417,6 @@ static struct ib_qp *rdma_counter_get_qp(struct ib_device *dev, u32 qp_num)
return NULL;
}
-static int rdma_counter_bind_qp_manual(struct rdma_counter *counter,
- struct ib_qp *qp)
-{
- if ((counter->device != qp->device) || (counter->port != qp->port))
- return -EINVAL;
-
- return __rdma_counter_bind_qp(counter, qp);
-}
-
static struct rdma_counter *rdma_get_counter_by_id(struct ib_device *dev,
u32 counter_id)
{
@@ -475,7 +464,12 @@ int rdma_counter_bind_qpn(struct ib_device *dev, u8 port,
goto err_task;
}
- ret = rdma_counter_bind_qp_manual(counter, qp);
+ if ((counter->device != qp->device) || (counter->port != qp->port)) {
+ ret = -EINVAL;
+ goto err_task;
+ }
+
+ ret = __rdma_counter_bind_qp(counter, qp);
if (ret)
goto err_task;
@@ -520,26 +514,18 @@ int rdma_counter_bind_qpn_alloc(struct ib_device *dev, u8 port,
goto err;
}
- counter = rdma_counter_alloc(dev, port, RDMA_COUNTER_MODE_MANUAL);
+ counter = alloc_and_bind(dev, port, qp, RDMA_COUNTER_MODE_MANUAL);
if (!counter) {
ret = -ENOMEM;
goto err;
}
- ret = rdma_counter_bind_qp_manual(counter, qp);
- if (ret)
- goto err_bind;
-
if (counter_id)
*counter_id = counter->id;
- rdma_counter_res_add(counter, qp);
-
rdma_restrack_put(&qp->res);
- return ret;
+ return 0;
-err_bind:
- rdma_counter_free(counter);
err:
rdma_restrack_put(&qp->res);
return ret;
--
2.28.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH rdma-next] RDMA/counter: Combine allocation and bind logic
2020-11-15 9:34 [PATCH rdma-next] RDMA/counter: Combine allocation and bind logic Leon Romanovsky
@ 2020-11-15 13:36 ` Leon Romanovsky
0 siblings, 0 replies; 2+ messages in thread
From: Leon Romanovsky @ 2020-11-15 13:36 UTC (permalink / raw)
To: Doug Ledford, Jason Gunthorpe; +Cc: linux-rdma
On Sun, Nov 15, 2020 at 11:34:05AM +0200, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@nvidia.com>
>
> RDMA counters are allocated and bounded to QP immediately after that.
> Only after this two step process they are really usable. By combining
> the logic, we are ensuring that once counter is returned to the caller,
> it will have everything set.
>
> Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
> ---
> drivers/infiniband/core/counters.c | 130 +++++++++++++----------------
> 1 file changed, 58 insertions(+), 72 deletions(-)
Sorry, for resending it, you wrote here [1] that you took it, but I
don't see it in the tree.
[1] https://lore.kernel.org/linux-rdma/20201112185951.GA981682@nvidia.com/
Thanks
^ permalink raw reply [flat|nested] 2+ messages in thread
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