[PATCH mlx5-next 01/12] net/mlx5: Fix mlx5_core_destroy_cq() error flow

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* [PATCH mlx5-next 01/12] net/mlx5: Fix mlx5_core_destroy_cq() error flow
       [not found] <20190613064639.30898-1-leon@kernel.org>
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH mlx5-next 02/12] net/mlx5: Use event mask based on device capabilities Leon Romanovsky
                   ` (10 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

The firmware command to destroy a CQ might fail when the object is
referenced by other object and the ref count is managed by the firmware.

To enable a second successful destruction post the first failure need to
change  mlx5_eq_del_cq() to be a void function.

As an error in mlx5_eq_del_cq() is quite fatal from the option to
recover, a debug message inside it should be good enough and it was
changed to be void.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/cq.c     |  9 ++-------
 drivers/net/ethernet/mellanox/mlx5/core/eq.c     | 16 +++++++---------
 drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h |  2 +-
 3 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cq.c b/drivers/net/ethernet/mellanox/mlx5/core/cq.c
index 713a17ee3751..703d88332bc6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cq.c
@@ -158,13 +158,8 @@ int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
 	u32 in[MLX5_ST_SZ_DW(destroy_cq_in)] = {0};
 	int err;
 
-	err = mlx5_eq_del_cq(mlx5_get_async_eq(dev), cq);
-	if (err)
-		return err;
-
-	err = mlx5_eq_del_cq(&cq->eq->core, cq);
-	if (err)
-		return err;
+	mlx5_eq_del_cq(mlx5_get_async_eq(dev), cq);
+	mlx5_eq_del_cq(&cq->eq->core, cq);
 
 	MLX5_SET(destroy_cq_in, in, opcode, MLX5_CMD_OP_DESTROY_CQ);
 	MLX5_SET(destroy_cq_in, in, cqn, cq->cqn);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 23883d1fa22f..7c4213147541 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -382,7 +382,7 @@ int mlx5_eq_add_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq)
 	return err;
 }
 
-int mlx5_eq_del_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq)
+void mlx5_eq_del_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq)
 {
 	struct mlx5_cq_table *table = &eq->cq_table;
 	struct mlx5_core_cq *tmp;
@@ -392,16 +392,14 @@ int mlx5_eq_del_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq)
 	spin_unlock(&table->lock);
 
 	if (!tmp) {
-		mlx5_core_warn(eq->dev, "cq 0x%x not found in eq 0x%x tree\n", eq->eqn, cq->cqn);
-		return -ENOENT;
+		mlx5_core_dbg(eq->dev, "cq 0x%x not found in eq 0x%x tree\n",
+			      eq->eqn, cq->cqn);
+		return;
 	}
 
-	if (tmp != cq) {
-		mlx5_core_warn(eq->dev, "corruption on cqn 0x%x in eq 0x%x\n", eq->eqn, cq->cqn);
-		return -EINVAL;
-	}
-
-	return 0;
+	if (tmp != cq)
+		mlx5_core_dbg(eq->dev, "corruption on cqn 0x%x in eq 0x%x\n",
+			      eq->eqn, cq->cqn);
 }
 
 int mlx5_eq_table_init(struct mlx5_core_dev *dev)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h
index c0fb6d72b695..eb105338467d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h
@@ -70,7 +70,7 @@ int mlx5_eq_table_create(struct mlx5_core_dev *dev);
 void mlx5_eq_table_destroy(struct mlx5_core_dev *dev);
 
 int mlx5_eq_add_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq);
-int mlx5_eq_del_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq);
+void mlx5_eq_del_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq);
 struct mlx5_eq_comp *mlx5_eqn2comp_eq(struct mlx5_core_dev *dev, int eqn);
 struct mlx5_eq *mlx5_get_async_eq(struct mlx5_core_dev *dev);
 void mlx5_cq_tasklet_cb(unsigned long data);
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH mlx5-next 02/12] net/mlx5: Use event mask based on device capabilities
       [not found] <20190613064639.30898-1-leon@kernel.org>
  2019-06-13  6:46 ` [PATCH mlx5-next 01/12] net/mlx5: Fix mlx5_core_destroy_cq() error flow Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH mlx5-next 03/12] net/mlx5: Expose the API to register for ANY event Leon Romanovsky
                   ` (9 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Use the reported device capabilities for the supported user events (i.e.
affiliated and un-affiliated) to set the EQ mask.

As the event mask can be up to 256 defined by 4 entries of u64 change
the applicable code to work accordingly.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/odp.c             |  3 +-
 drivers/net/ethernet/mellanox/mlx5/core/eq.c | 43 ++++++++++++++++----
 drivers/net/ethernet/mellanox/mlx5/core/fw.c |  6 +++
 include/linux/mlx5/device.h                  |  6 ++-
 include/linux/mlx5/eq.h                      |  2 +-
 include/linux/mlx5/mlx5_ifc.h                | 13 ++++--
 6 files changed, 59 insertions(+), 14 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index 1bf7881aed59..caa10a338668 100644
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -1556,11 +1556,12 @@ mlx5_ib_create_pf_eq(struct mlx5_ib_dev *dev, struct mlx5_ib_pf_eq *eq)
 
 	param = (struct mlx5_eq_param) {
 		.index = MLX5_EQ_PFAULT_IDX,
-		.mask = 1 << MLX5_EVENT_TYPE_PAGE_FAULT,
 		.nent = MLX5_IB_NUM_PF_EQE,
 		.context = eq,
 		.handler = mlx5_ib_eq_pf_int
 	};
+
+	param.mask[0] = 1ull << MLX5_EVENT_TYPE_PAGE_FAULT;
 	eq->core = mlx5_eq_create_generic(dev->mdev, "mlx5_ib_page_fault_eq", &param);
 	if (IS_ERR(eq->core)) {
 		err = PTR_ERR(eq->core);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 7c4213147541..696a0fdd075a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -261,6 +261,7 @@ create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, const char *name,
 	int inlen;
 	u32 *in;
 	int err;
+	int i;
 
 	if (eq_table->irq_info[vecidx].context)
 		return -EEXIST;
@@ -291,10 +292,12 @@ create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, const char *name,
 	mlx5_fill_page_array(&eq->buf, pas);
 
 	MLX5_SET(create_eq_in, in, opcode, MLX5_CMD_OP_CREATE_EQ);
-	if (!param->mask && MLX5_CAP_GEN(dev, log_max_uctx))
+	if (!param->mask[0] && MLX5_CAP_GEN(dev, log_max_uctx))
 		MLX5_SET(create_eq_in, in, uid, MLX5_SHARED_RESOURCE_UID);
 
-	MLX5_SET64(create_eq_in, in, event_bitmask, param->mask);
+	for (i = 0; i < 4; i++)
+		MLX5_ARRAY_SET64(create_eq_in, in, event_bitmask, i,
+				 param->mask[i]);
 
 	eqc = MLX5_ADDR_OF(create_eq_in, in, eq_context_entry);
 	MLX5_SET(eqc, eqc, log_eq_size, ilog2(eq->nent));
@@ -498,10 +501,32 @@ static int cq_err_event_notifier(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
-static u64 gather_async_events_mask(struct mlx5_core_dev *dev)
+static void gather_async_events_from_cap(struct mlx5_core_dev *dev,
+					 u64 mask[4])
+{
+	__be64 *user_unaffiliated_events;
+	__be64 *user_affiliated_events;
+	int i;
+
+	user_affiliated_events =
+		MLX5_CAP_DEV_EVENT(dev, user_affiliated_events);
+	user_unaffiliated_events =
+		MLX5_CAP_DEV_EVENT(dev, user_unaffiliated_events);
+
+	for (i = 0; i < 4; i++)
+		mask[i] = be64_to_cpu(user_affiliated_events[i] |
+				      user_unaffiliated_events[i]);
+}
+
+static void gather_async_events_mask(struct mlx5_core_dev *dev, u64 mask[4])
 {
 	u64 async_event_mask = MLX5_ASYNC_EVENT_MASK;
 
+	if (MLX5_CAP_GEN(dev, event_cap)) {
+		gather_async_events_from_cap(dev, mask);
+		return;
+	}
+
 	if (MLX5_VPORT_MANAGER(dev))
 		async_event_mask |= (1ull << MLX5_EVENT_TYPE_NIC_VPORT_CHANGE);
 
@@ -534,7 +559,7 @@ static u64 gather_async_events_mask(struct mlx5_core_dev *dev)
 	if (mlx5_core_is_ecpf_esw_manager(dev))
 		async_event_mask |= (1ull << MLX5_EVENT_TYPE_HOST_PARAMS_CHANGE);
 
-	return async_event_mask;
+	mask[0] = async_event_mask;
 }
 
 static int create_async_eqs(struct mlx5_core_dev *dev)
@@ -548,11 +573,12 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
 
 	param = (struct mlx5_eq_param) {
 		.index = MLX5_EQ_CMD_IDX,
-		.mask = 1ull << MLX5_EVENT_TYPE_CMD,
 		.nent = MLX5_NUM_CMD_EQE,
 		.context = &table->cmd_eq,
 		.handler = mlx5_eq_async_int,
 	};
+
+	param.mask[0] = 1ull << MLX5_EVENT_TYPE_CMD;
 	err = create_async_eq(dev, "mlx5_cmd_eq", &table->cmd_eq, &param);
 	if (err) {
 		mlx5_core_warn(dev, "failed to create cmd EQ %d\n", err);
@@ -563,11 +589,12 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
 
 	param = (struct mlx5_eq_param) {
 		.index = MLX5_EQ_ASYNC_IDX,
-		.mask = gather_async_events_mask(dev),
 		.nent = MLX5_NUM_ASYNC_EQE,
 		.context = &table->async_eq,
 		.handler = mlx5_eq_async_int,
 	};
+
+	gather_async_events_mask(dev, param.mask);
 	err = create_async_eq(dev, "mlx5_async_eq", &table->async_eq, &param);
 	if (err) {
 		mlx5_core_warn(dev, "failed to create async EQ %d\n", err);
@@ -576,11 +603,12 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
 
 	param = (struct mlx5_eq_param) {
 		.index = MLX5_EQ_PAGEREQ_IDX,
-		.mask =  1 << MLX5_EVENT_TYPE_PAGE_REQUEST,
 		.nent = /* TODO: sriov max_vf + */ 1,
 		.context = &table->pages_eq,
 		.handler = mlx5_eq_async_int,
 	};
+
+	param.mask[0] = 1ull << MLX5_EVENT_TYPE_PAGE_REQUEST;
 	err = create_async_eq(dev, "mlx5_pages_eq", &table->pages_eq, &param);
 	if (err) {
 		mlx5_core_warn(dev, "failed to create pages EQ %d\n", err);
@@ -837,7 +865,6 @@ static int create_comp_eqs(struct mlx5_core_dev *dev)
 		snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_comp%d", i);
 		param = (struct mlx5_eq_param) {
 			.index = vecidx,
-			.mask = 0,
 			.nent = nent,
 			.context = &eq->core,
 			.handler = mlx5_eq_comp_int
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw.c b/drivers/net/ethernet/mellanox/mlx5/core/fw.c
index 1ab6f7e3bec6..05367f15c3a7 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fw.c
@@ -202,6 +202,12 @@ int mlx5_query_hca_caps(struct mlx5_core_dev *dev)
 			return err;
 	}
 
+	if (MLX5_CAP_GEN(dev, event_cap)) {
+		err = mlx5_core_get_caps(dev, MLX5_CAP_DEV_EVENT);
+		if (err)
+			return err;
+	}
+
 	return 0;
 }
 
diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index fc2b6e807f06..373a1b650a01 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -351,7 +351,7 @@ enum mlx5_event {
 
 	MLX5_EVENT_TYPE_DEVICE_TRACER      = 0x26,
 
-	MLX5_EVENT_TYPE_MAX                = MLX5_EVENT_TYPE_DEVICE_TRACER + 1,
+	MLX5_EVENT_TYPE_MAX                = 0x100,
 };
 
 enum {
@@ -1077,6 +1077,7 @@ enum mlx5_cap_type {
 	MLX5_CAP_DEBUG,
 	MLX5_CAP_RESERVED_14,
 	MLX5_CAP_DEV_MEM,
+	MLX5_CAP_DEV_EVENT = 0x14,
 	/* NUM OF CAP Types */
 	MLX5_CAP_NUM
 };
@@ -1255,6 +1256,9 @@ enum mlx5_qcam_feature_groups {
 #define MLX5_CAP64_DEV_MEM(mdev, cap)\
 	MLX5_GET64(device_mem_cap, mdev->caps.hca_cur[MLX5_CAP_DEV_MEM], cap)
 
+#define MLX5_CAP_DEV_EVENT(mdev, cap)\
+	MLX5_ADDR_OF(device_event_cap, (mdev)->caps.hca_cur[MLX5_CAP_DEV_EVENT], cap)
+
 enum {
 	MLX5_CMD_STAT_OK			= 0x0,
 	MLX5_CMD_STAT_INT_ERR			= 0x1,
diff --git a/include/linux/mlx5/eq.h b/include/linux/mlx5/eq.h
index 00045cc4ea11..98152f799ecd 100644
--- a/include/linux/mlx5/eq.h
+++ b/include/linux/mlx5/eq.h
@@ -25,7 +25,7 @@ struct mlx5_core_dev;
 struct mlx5_eq_param {
 	u8             index;
 	int            nent;
-	u64            mask;
+	u64            mask[4];
 	void          *context;
 	irq_handler_t  handler;
 };
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 9c9979cf0fd5..24a814b445bb 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -818,6 +818,12 @@ struct mlx5_ifc_device_mem_cap_bits {
 	u8         reserved_at_180[0x680];
 };
 
+struct mlx5_ifc_device_event_cap_bits {
+	u8         user_affiliated_events[4][0x40];
+
+	u8         user_unaffiliated_events[4][0x40];
+};
+
 enum {
 	MLX5_ATOMIC_CAPS_ATOMIC_SIZE_QP_1_BYTE     = 0x0,
 	MLX5_ATOMIC_CAPS_ATOMIC_SIZE_QP_2_BYTES    = 0x2,
@@ -975,7 +981,8 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 
 	u8         log_max_srq_sz[0x8];
 	u8         log_max_qp_sz[0x8];
-	u8         reserved_at_90[0x8];
+	u8         event_cap[0x1];
+	u8         reserved_at_91[0x7];
 	u8         prio_tag_required[0x1];
 	u8         reserved_at_99[0x2];
 	u8         log_max_qp[0x5];
@@ -7357,9 +7364,9 @@ struct mlx5_ifc_create_eq_in_bits {
 
 	u8         reserved_at_280[0x40];
 
-	u8         event_bitmask[0x40];
+	u8         event_bitmask[4][0x40];
 
-	u8         reserved_at_300[0x580];
+	u8         reserved_at_3c0[0x4c0];
 
 	u8         pas[0][0x40];
 };
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH mlx5-next 03/12] net/mlx5: Expose the API to register for ANY event
       [not found] <20190613064639.30898-1-leon@kernel.org>
  2019-06-13  6:46 ` [PATCH mlx5-next 01/12] net/mlx5: Fix mlx5_core_destroy_cq() error flow Leon Romanovsky
  2019-06-13  6:46 ` [PATCH mlx5-next 02/12] net/mlx5: Use event mask based on device capabilities Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH mlx5-next 04/12] net/mlx5: mlx5_core_create_cq() enhancements Leon Romanovsky
                   ` (8 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Expose the API to register for ANY event, mlx5_ib will be able to use
this functionality for its needs.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/eq.c     | 2 ++
 drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h | 3 ---
 include/linux/mlx5/driver.h                      | 2 ++
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 696a0fdd075a..5971c1870e0d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -1064,6 +1064,7 @@ int mlx5_eq_notifier_register(struct mlx5_core_dev *dev, struct mlx5_nb *nb)
 
 	return atomic_notifier_chain_register(&eqt->nh[nb->event_type], &nb->nb);
 }
+EXPORT_SYMBOL(mlx5_eq_notifier_register);
 
 int mlx5_eq_notifier_unregister(struct mlx5_core_dev *dev, struct mlx5_nb *nb)
 {
@@ -1074,3 +1075,4 @@ int mlx5_eq_notifier_unregister(struct mlx5_core_dev *dev, struct mlx5_nb *nb)
 
 	return atomic_notifier_chain_unregister(&eqt->nh[nb->event_type], &nb->nb);
 }
+EXPORT_SYMBOL(mlx5_eq_notifier_unregister);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h
index eb105338467d..018fd72d421b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h
@@ -92,7 +92,4 @@ void mlx5_core_eq_free_irqs(struct mlx5_core_dev *dev);
 struct cpu_rmap *mlx5_eq_table_get_rmap(struct mlx5_core_dev *dev);
 #endif
 
-int mlx5_eq_notifier_register(struct mlx5_core_dev *dev, struct mlx5_nb *nb);
-int mlx5_eq_notifier_unregister(struct mlx5_core_dev *dev, struct mlx5_nb *nb);
-
 #endif
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 5a27246db883..2fa95daefae0 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -1042,6 +1042,8 @@ int mlx5_register_interface(struct mlx5_interface *intf);
 void mlx5_unregister_interface(struct mlx5_interface *intf);
 int mlx5_notifier_register(struct mlx5_core_dev *dev, struct notifier_block *nb);
 int mlx5_notifier_unregister(struct mlx5_core_dev *dev, struct notifier_block *nb);
+int mlx5_eq_notifier_register(struct mlx5_core_dev *dev, struct mlx5_nb *nb);
+int mlx5_eq_notifier_unregister(struct mlx5_core_dev *dev, struct mlx5_nb *nb);
 
 int mlx5_core_query_vendor_id(struct mlx5_core_dev *mdev, u32 *vendor_id);
 
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH mlx5-next 04/12] net/mlx5: mlx5_core_create_cq() enhancements
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (2 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH mlx5-next 03/12] net/mlx5: Expose the API to register for ANY event Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH mlx5-next 05/12] net/mlx5: Report a CQ error event only when a handler was set Leon Romanovsky
                   ` (7 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Enhance mlx5_core_create_cq() to get the command out buffer from the
callers to let them use the output.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/cq.c                     | 3 ++-
 drivers/net/ethernet/mellanox/mlx5/core/cq.c        | 7 +++----
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c   | 3 ++-
 drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c | 3 ++-
 include/linux/mlx5/cq.h                             | 2 +-
 5 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 07b73df0e1a3..9f39e7b9dd1b 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -892,6 +892,7 @@ int mlx5_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 	int vector = attr->comp_vector;
 	struct mlx5_ib_dev *dev = to_mdev(ibdev);
 	struct mlx5_ib_cq *cq = to_mcq(ibcq);
+	u32 out[MLX5_ST_SZ_DW(create_cq_out)];
 	int uninitialized_var(index);
 	int uninitialized_var(inlen);
 	u32 *cqb = NULL;
@@ -954,7 +955,7 @@ int mlx5_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 	if (cq->create_flags & IB_UVERBS_CQ_FLAGS_IGNORE_OVERRUN)
 		MLX5_SET(cqc, cqc, oi, 1);
 
-	err = mlx5_core_create_cq(dev->mdev, &cq->mcq, cqb, inlen);
+	err = mlx5_core_create_cq(dev->mdev, &cq->mcq, cqb, inlen, out, sizeof(out));
 	if (err)
 		goto err_cqb;
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cq.c b/drivers/net/ethernet/mellanox/mlx5/core/cq.c
index 703d88332bc6..1bd4336392a2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cq.c
@@ -87,11 +87,10 @@ static void mlx5_add_cq_to_tasklet(struct mlx5_core_cq *cq)
 }
 
 int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
-			u32 *in, int inlen)
+			u32 *in, int inlen, u32 *out, int outlen)
 {
 	int eqn = MLX5_GET(cqc, MLX5_ADDR_OF(create_cq_in, in, cq_context), c_eqn);
 	u32 dout[MLX5_ST_SZ_DW(destroy_cq_out)];
-	u32 out[MLX5_ST_SZ_DW(create_cq_out)];
 	u32 din[MLX5_ST_SZ_DW(destroy_cq_in)];
 	struct mlx5_eq_comp *eq;
 	int err;
@@ -100,9 +99,9 @@ int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 	if (IS_ERR(eq))
 		return PTR_ERR(eq);
 
-	memset(out, 0, sizeof(out));
+	memset(out, 0, outlen);
 	MLX5_SET(create_cq_in, in, opcode, MLX5_CMD_OP_CREATE_CQ);
-	err = mlx5_cmd_exec(dev, in, inlen, out, sizeof(out));
+	err = mlx5_cmd_exec(dev, in, inlen, out, outlen);
 	if (err)
 		return err;
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 457cc39423f2..7186282785df 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1517,6 +1517,7 @@ static void mlx5e_free_cq(struct mlx5e_cq *cq)
 
 static int mlx5e_create_cq(struct mlx5e_cq *cq, struct mlx5e_cq_param *param)
 {
+	u32 out[MLX5_ST_SZ_DW(create_cq_out)];
 	struct mlx5_core_dev *mdev = cq->mdev;
 	struct mlx5_core_cq *mcq = &cq->mcq;
 
@@ -1551,7 +1552,7 @@ static int mlx5e_create_cq(struct mlx5e_cq *cq, struct mlx5e_cq_param *param)
 					    MLX5_ADAPTER_PAGE_SHIFT);
 	MLX5_SET64(cqc, cqc, dbr_addr,      cq->wq_ctrl.db.dma);
 
-	err = mlx5_core_create_cq(mdev, mcq, in, inlen);
+	err = mlx5_core_create_cq(mdev, mcq, in, inlen, out, sizeof(out));
 
 	kvfree(in);
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c b/drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c
index ca2296a2f9ee..dc7b9d9f274d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c
@@ -429,6 +429,7 @@ static int mlx5_fpga_conn_create_cq(struct mlx5_fpga_conn *conn, int cq_size)
 	struct mlx5_fpga_device *fdev = conn->fdev;
 	struct mlx5_core_dev *mdev = fdev->mdev;
 	u32 temp_cqc[MLX5_ST_SZ_DW(cqc)] = {0};
+	u32 out[MLX5_ST_SZ_DW(create_cq_out)];
 	struct mlx5_wq_param wqp;
 	struct mlx5_cqe64 *cqe;
 	int inlen, err, eqn;
@@ -476,7 +477,7 @@ static int mlx5_fpga_conn_create_cq(struct mlx5_fpga_conn *conn, int cq_size)
 	pas = (__be64 *)MLX5_ADDR_OF(create_cq_in, in, pas);
 	mlx5_fill_page_frag_array(&conn->cq.wq_ctrl.buf, pas);
 
-	err = mlx5_core_create_cq(mdev, &conn->cq.mcq, in, inlen);
+	err = mlx5_core_create_cq(mdev, &conn->cq.mcq, in, inlen, out, sizeof(out));
 	kvfree(in);
 
 	if (err)
diff --git a/include/linux/mlx5/cq.h b/include/linux/mlx5/cq.h
index 769326ea1d9b..e44157a2b7db 100644
--- a/include/linux/mlx5/cq.h
+++ b/include/linux/mlx5/cq.h
@@ -185,7 +185,7 @@ static inline void mlx5_cq_put(struct mlx5_core_cq *cq)
 }
 
 int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
-			u32 *in, int inlen);
+			u32 *in, int inlen, u32 *out, int outlen);
 int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
 int mlx5_core_query_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 		       u32 *out, int outlen);
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH mlx5-next 05/12] net/mlx5: Report a CQ error event only when a handler was set
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (3 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH mlx5-next 04/12] net/mlx5: mlx5_core_create_cq() enhancements Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH mlx5-next 06/12] net/mlx5: Report EQE data upon CQ completion Leon Romanovsky
                   ` (6 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Report a CQ error event only when a handler was set.

This enables mlx5_ib to not set a handler upon CQ creation and use some
other mechanism to get this event as of other events by the
mlx5_eq_notifier_register API.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/eq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 5971c1870e0d..c2a679657c34 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -494,7 +494,8 @@ static int cq_err_event_notifier(struct notifier_block *nb,
 		return NOTIFY_OK;
 	}
 
-	cq->event(cq, type);
+	if (cq->event)
+		cq->event(cq, type);
 
 	mlx5_cq_put(cq);
 
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH mlx5-next 06/12] net/mlx5: Report EQE data upon CQ completion
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (4 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH mlx5-next 05/12] net/mlx5: Report a CQ error event only when a handler was set Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH mlx5-next 07/12] net/mlx5: Expose device definitions for object events Leon Romanovsky
                   ` (5 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Report EQE data upon CQ completion to let upper layers use this data.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/cq.c                     | 2 +-
 drivers/infiniband/hw/mlx5/main.c                   | 2 +-
 drivers/infiniband/hw/mlx5/qp.c                     | 2 +-
 drivers/net/ethernet/mellanox/mlx5/core/cq.c        | 5 +++--
 drivers/net/ethernet/mellanox/mlx5/core/en.h        | 2 +-
 drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c   | 2 +-
 drivers/net/ethernet/mellanox/mlx5/core/eq.c        | 2 +-
 drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c | 3 ++-
 include/linux/mlx5/cq.h                             | 4 ++--
 9 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 9f39e7b9dd1b..fa6d49d583fe 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -37,7 +37,7 @@
 #include "mlx5_ib.h"
 #include "srq.h"
 
-static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq)
+static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq, struct mlx5_eqe *eqe)
 {
 	struct ib_cq *ibcq = &to_mibcq(cq)->ibcq;
 
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 33709fd93ab2..8850e3f9c855 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -4463,7 +4463,7 @@ static void mlx5_ib_handle_internal_error(struct mlx5_ib_dev *ibdev)
 	 * lock/unlock above locks Now need to arm all involved CQs.
 	 */
 	list_for_each_entry(mcq, &cq_armed_list, reset_notify) {
-		mcq->comp(mcq);
+		mcq->comp(mcq, NULL);
 	}
 	spin_unlock_irqrestore(&ibdev->reset_flow_resource_lock, flags);
 }
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 63d8f61e50e0..f240e022682b 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -6409,7 +6409,7 @@ static void handle_drain_completion(struct ib_cq *cq,
 		/* Run the CQ handler - this makes sure that the drain WR will
 		 * be processed if wasn't processed yet.
 		 */
-		mcq->mcq.comp(&mcq->mcq);
+		mcq->mcq.comp(&mcq->mcq, NULL);
 	}
 
 	wait_for_completion(&sdrain->done);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cq.c b/drivers/net/ethernet/mellanox/mlx5/core/cq.c
index 1bd4336392a2..818edc63e428 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cq.c
@@ -58,7 +58,7 @@ void mlx5_cq_tasklet_cb(unsigned long data)
 	list_for_each_entry_safe(mcq, temp, &ctx->process_list,
 				 tasklet_ctx.list) {
 		list_del_init(&mcq->tasklet_ctx.list);
-		mcq->tasklet_ctx.comp(mcq);
+		mcq->tasklet_ctx.comp(mcq, NULL);
 		mlx5_cq_put(mcq);
 		if (time_after(jiffies, end))
 			break;
@@ -68,7 +68,8 @@ void mlx5_cq_tasklet_cb(unsigned long data)
 		tasklet_schedule(&ctx->task);
 }
 
-static void mlx5_add_cq_to_tasklet(struct mlx5_core_cq *cq)
+static void mlx5_add_cq_to_tasklet(struct mlx5_core_cq *cq,
+				   struct mlx5_eqe *eqe)
 {
 	unsigned long flags;
 	struct mlx5_eq_tasklet *tasklet_ctx = cq->tasklet_ctx.priv;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 3a183d690e23..16753f263079 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -780,7 +780,7 @@ netdev_tx_t mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
 			  struct mlx5e_tx_wqe *wqe, u16 pi, bool xmit_more);
 
 void mlx5e_trigger_irq(struct mlx5e_icosq *sq);
-void mlx5e_completion_event(struct mlx5_core_cq *mcq);
+void mlx5e_completion_event(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe);
 void mlx5e_cq_error_event(struct mlx5_core_cq *mcq, enum mlx5_event event);
 int mlx5e_napi_poll(struct napi_struct *napi, int budget);
 bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c
index f9862bf75491..c665ae0f22bd 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c
@@ -136,7 +136,7 @@ int mlx5e_napi_poll(struct napi_struct *napi, int budget)
 	return work_done;
 }
 
-void mlx5e_completion_event(struct mlx5_core_cq *mcq)
+void mlx5e_completion_event(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
 {
 	struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq);
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index c2a679657c34..396e66c379a6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -144,7 +144,7 @@ static irqreturn_t mlx5_eq_comp_int(int irq, void *eq_ptr)
 		cq = mlx5_eq_cq_get(eq, cqn);
 		if (likely(cq)) {
 			++cq->arm_sn;
-			cq->comp(cq);
+			cq->comp(cq, eqe);
 			mlx5_cq_put(cq);
 		} else {
 			mlx5_core_warn(eq->dev, "Completion event for bogus CQ 0x%x\n", cqn);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c b/drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c
index dc7b9d9f274d..028891823f32 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c
@@ -414,7 +414,8 @@ static void mlx5_fpga_conn_cq_tasklet(unsigned long data)
 	mlx5_fpga_conn_cqes(conn, MLX5_FPGA_CQ_BUDGET);
 }
 
-static void mlx5_fpga_conn_cq_complete(struct mlx5_core_cq *mcq)
+static void mlx5_fpga_conn_cq_complete(struct mlx5_core_cq *mcq,
+				       struct mlx5_eqe *eqe)
 {
 	struct mlx5_fpga_conn *conn;
 
diff --git a/include/linux/mlx5/cq.h b/include/linux/mlx5/cq.h
index e44157a2b7db..40748fc1b11b 100644
--- a/include/linux/mlx5/cq.h
+++ b/include/linux/mlx5/cq.h
@@ -47,7 +47,7 @@ struct mlx5_core_cq {
 	struct completion	free;
 	unsigned		vector;
 	unsigned int		irqn;
-	void (*comp)		(struct mlx5_core_cq *);
+	void (*comp)(struct mlx5_core_cq *cq, struct mlx5_eqe *eqe);
 	void (*event)		(struct mlx5_core_cq *, enum mlx5_event);
 	u32			cons_index;
 	unsigned		arm_sn;
@@ -55,7 +55,7 @@ struct mlx5_core_cq {
 	int			pid;
 	struct {
 		struct list_head list;
-		void (*comp)(struct mlx5_core_cq *);
+		void (*comp)(struct mlx5_core_cq *cq, struct mlx5_eqe *eqe);
 		void		*priv;
 	} tasklet_ctx;
 	int			reset_notify_added;
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH mlx5-next 07/12] net/mlx5: Expose device definitions for object events
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (5 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH mlx5-next 06/12] net/mlx5: Report EQE data upon CQ completion Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH rdma-next 08/12] IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD Leon Romanovsky
                   ` (4 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Expose an extra device definitions for objects events.

It includes: object_type values for legacy objects and generic data
header for any other object.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 include/linux/mlx5/mlx5_ifc.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 24a814b445bb..fe3103e8ca92 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -91,6 +91,20 @@ enum {
 
 enum {
 	MLX5_OBJ_TYPE_GENEVE_TLV_OPT = 0x000b,
+	MLX5_OBJ_TYPE_MKEY = 0xff01,
+	MLX5_OBJ_TYPE_QP = 0xff02,
+	MLX5_OBJ_TYPE_PSV = 0xff03,
+	MLX5_OBJ_TYPE_RMP = 0xff04,
+	MLX5_OBJ_TYPE_XRC_SRQ = 0xff05,
+	MLX5_OBJ_TYPE_RQ = 0xff06,
+	MLX5_OBJ_TYPE_SQ = 0xff07,
+	MLX5_OBJ_TYPE_TIR = 0xff08,
+	MLX5_OBJ_TYPE_TIS = 0xff09,
+	MLX5_OBJ_TYPE_DCT = 0xff0a,
+	MLX5_OBJ_TYPE_XRQ = 0xff0b,
+	MLX5_OBJ_TYPE_RQT = 0xff0e,
+	MLX5_OBJ_TYPE_FLOW_COUNTER = 0xff0f,
+	MLX5_OBJ_TYPE_CQ = 0xff10,
 };
 
 enum {
@@ -9736,4 +9750,11 @@ struct mlx5_ifc_query_host_params_out_bits {
 	u8         reserved_at_280[0x180];
 };
 
+struct mlx5_ifc_affiliated_event_header_bits {
+	u8         reserved_at_0[0x10];
+	u8         obj_type[0x10];
+
+	u8         obj_id[0x10];
+};
+
 #endif /* MLX5_IFC_H */
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH rdma-next 08/12] IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (6 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH mlx5-next 07/12] net/mlx5: Expose device definitions for object events Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH rdma-next 09/12] IB/mlx5: Register DEVX with mlx5_core to get async events Leon Romanovsky
                   ` (3 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD and its initial
implementation.

This object is from type class FD and will be used to read DEVX
async events.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/devx.c         | 112 ++++++++++++++++++++--
 include/uapi/rdma/mlx5_user_ioctl_cmds.h  |  10 ++
 include/uapi/rdma/mlx5_user_ioctl_verbs.h |   4 +
 3 files changed, 116 insertions(+), 10 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index 80b42d069328..1815ce0f8daf 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -33,6 +33,24 @@ struct devx_async_data {
 	struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;
 };
 
+struct devx_async_event_queue {
+	spinlock_t		lock;
+	wait_queue_head_t	poll_wait;
+	struct list_head	event_list;
+	atomic_t		bytes_in_use;
+	u8			is_destroyed:1;
+	u32			flags;
+};
+
+struct devx_async_event_file {
+	struct ib_uobject		uobj;
+	struct list_head subscribed_events_list; /* Head of events that are
+						  * subscribed to this FD
+						  */
+	struct devx_async_event_queue	ev_queue;
+	struct mlx5_ib_dev *dev;
+};
+
 #define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in)
 struct devx_obj {
 	struct mlx5_core_dev	*mdev;
@@ -1336,27 +1354,21 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
 			      cmd_out, cmd_out_len);
 }
 
-struct devx_async_event_queue {
-	spinlock_t		lock;
-	wait_queue_head_t	poll_wait;
-	struct list_head	event_list;
-	atomic_t		bytes_in_use;
-	u8			is_destroyed:1;
-};
-
 struct devx_async_cmd_event_file {
 	struct ib_uobject		uobj;
 	struct devx_async_event_queue	ev_queue;
 	struct mlx5_async_ctx		async_ctx;
 };
 
-static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
+static void devx_init_event_queue(struct devx_async_event_queue *ev_queue,
+				  u32 flags)
 {
 	spin_lock_init(&ev_queue->lock);
 	INIT_LIST_HEAD(&ev_queue->event_list);
 	init_waitqueue_head(&ev_queue->poll_wait);
 	atomic_set(&ev_queue->bytes_in_use, 0);
 	ev_queue->is_destroyed = 0;
+	ev_queue->flags = flags;
 }
 
 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
@@ -1370,11 +1382,38 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
 
 	ev_file = container_of(uobj, struct devx_async_cmd_event_file,
 			       uobj);
-	devx_init_event_queue(&ev_file->ev_queue);
+	devx_init_event_queue(&ev_file->ev_queue, 0);
 	mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
 	return 0;
 }
 
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
+	struct uverbs_attr_bundle *attrs)
+{
+	struct ib_uobject *uobj = uverbs_attr_get_uobject(
+		attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
+	struct devx_async_event_file *ev_file;
+	struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
+		&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
+	struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
+	u32 flags;
+	int err;
+
+	err = uverbs_get_flags32(&flags, attrs,
+		MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
+		MLX5_IB_UAPI_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA);
+
+	if (err)
+		return err;
+
+	ev_file = container_of(uobj, struct devx_async_event_file,
+			       uobj);
+	devx_init_event_queue(&ev_file->ev_queue, flags);
+	INIT_LIST_HEAD(&ev_file->subscribed_events_list);
+	ev_file->dev = dev;
+	return 0;
+}
+
 static void devx_query_callback(int status, struct mlx5_async_work *context)
 {
 	struct devx_async_data *async_data =
@@ -1729,6 +1768,32 @@ static const struct file_operations devx_async_cmd_event_fops = {
 	.llseek	 = no_llseek,
 };
 
+static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
+				     size_t count, loff_t *pos)
+{
+	return -EINVAL;
+}
+
+static __poll_t devx_async_event_poll(struct file *filp,
+				      struct poll_table_struct *wait)
+{
+	return 0;
+}
+
+static int devx_async_event_close(struct inode *inode, struct file *filp)
+{
+	uverbs_close_fd(filp);
+	return 0;
+}
+
+static const struct file_operations devx_async_event_fops = {
+	.owner	 = THIS_MODULE,
+	.read	 = devx_async_event_read,
+	.poll    = devx_async_event_poll,
+	.release = devx_async_event_close,
+	.llseek	 = no_llseek,
+};
+
 static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj,
 						   enum rdma_remove_reason why)
 {
@@ -1748,6 +1813,12 @@ static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj,
 	return 0;
 };
 
+static int devx_hot_unplug_async_event_file(struct ib_uobject *uobj,
+					    enum rdma_remove_reason why)
+{
+	return 0;
+};
+
 DECLARE_UVERBS_NAMED_METHOD(
 	MLX5_IB_METHOD_DEVX_UMEM_REG,
 	UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
@@ -1913,6 +1984,24 @@ DECLARE_UVERBS_NAMED_OBJECT(
 			     O_RDONLY),
 	&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
 
+DECLARE_UVERBS_NAMED_METHOD(
+	MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
+	UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
+			MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
+			UVERBS_ACCESS_NEW,
+			UA_MANDATORY),
+	UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
+			enum mlx5_ib_uapi_devx_create_event_channel_flags,
+			UA_MANDATORY));
+
+DECLARE_UVERBS_NAMED_OBJECT(
+	MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
+	UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
+			     devx_hot_unplug_async_event_file,
+			     &devx_async_event_fops, "[devx_async_event]",
+			     O_RDONLY),
+	&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
+
 static bool devx_is_supported(struct ib_device *device)
 {
 	struct mlx5_ib_dev *dev = to_mdev(device);
@@ -1933,5 +2022,8 @@ const struct uapi_definition mlx5_ib_devx_defs[] = {
 	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
 		MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
 		UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
+	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
+		MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
+		UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
 	{},
 };
diff --git a/include/uapi/rdma/mlx5_user_ioctl_cmds.h b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
index d404c951954c..6ad8f4f11ddd 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
@@ -127,16 +127,26 @@ enum mlx5_ib_devx_async_cmd_fd_alloc_attrs {
 	MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
 };
 
+enum mlx5_ib_devx_async_event_fd_alloc_attrs {
+	MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
+	MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
+};
+
 enum mlx5_ib_devx_async_cmd_fd_methods {
 	MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC = (1U << UVERBS_ID_NS_SHIFT),
 };
 
+enum mlx5_ib_devx_async_event_fd_methods {
+	MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC = (1U << UVERBS_ID_NS_SHIFT),
+};
+
 enum mlx5_ib_objects {
 	MLX5_IB_OBJECT_DEVX = (1U << UVERBS_ID_NS_SHIFT),
 	MLX5_IB_OBJECT_DEVX_OBJ,
 	MLX5_IB_OBJECT_DEVX_UMEM,
 	MLX5_IB_OBJECT_FLOW_MATCHER,
 	MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
+	MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
 };
 
 enum mlx5_ib_flow_matcher_create_attrs {
diff --git a/include/uapi/rdma/mlx5_user_ioctl_verbs.h b/include/uapi/rdma/mlx5_user_ioctl_verbs.h
index a8f34c237458..57beea4589e4 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_verbs.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_verbs.h
@@ -63,5 +63,9 @@ enum mlx5_ib_uapi_dm_type {
 	MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM,
 };
 
+enum mlx5_ib_uapi_devx_create_event_channel_flags {
+	MLX5_IB_UAPI_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA = 1 << 0,
+};
+
 #endif
 
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH rdma-next 09/12] IB/mlx5: Register DEVX with mlx5_core to get async events
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (7 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH rdma-next 08/12] IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH rdma-next 10/12] IB/mlx5: Enable subscription for device events over DEVX Leon Romanovsky
                   ` (2 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Register DEVX with with mlx5_core to get async events.  This will enable
to dispatch the applicable events to its consumers in down stream
patches.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/devx.c    | 30 ++++++++++++++++++++++++++++
 drivers/infiniband/hw/mlx5/main.c    |  8 ++++++--
 drivers/infiniband/hw/mlx5/mlx5_ib.h | 12 +++++++++++
 3 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index 1815ce0f8daf..e9b9ba5a3e9a 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -1670,6 +1670,36 @@ static int devx_umem_cleanup(struct ib_uobject *uobject,
 	return 0;
 }
 
+static int devx_event_notifier(struct notifier_block *nb,
+			       unsigned long event_type, void *data)
+{
+	return NOTIFY_DONE;
+}
+
+void mlx5_ib_devx_init_event_table(struct mlx5_ib_dev *dev)
+{
+	struct mlx5_devx_event_table *table = &dev->devx_event_table;
+
+	xa_init(&table->event_xa);
+	mutex_init(&table->event_xa_lock);
+	MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY);
+	mlx5_eq_notifier_register(dev->mdev, &table->devx_nb);
+}
+
+void mlx5_ib_devx_cleanup_event_table(struct mlx5_ib_dev *dev)
+{
+	struct mlx5_devx_event_table *table = &dev->devx_event_table;
+	void *entry;
+	unsigned long id;
+
+	mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb);
+
+	xa_for_each(&table->event_xa, id, entry)
+		kfree(entry);
+
+	xa_destroy(&table->event_xa);
+}
+
 static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf,
 					 size_t count, loff_t *pos)
 {
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 8850e3f9c855..cbffc80fd0f7 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -6662,15 +6662,19 @@ static int mlx5_ib_stage_devx_init(struct mlx5_ib_dev *dev)
 	int uid;
 
 	uid = mlx5_ib_devx_create(dev, false);
-	if (uid > 0)
+	if (uid > 0) {
 		dev->devx_whitelist_uid = uid;
+		mlx5_ib_devx_init_event_table(dev);
+	}
 
 	return 0;
 }
 static void mlx5_ib_stage_devx_cleanup(struct mlx5_ib_dev *dev)
 {
-	if (dev->devx_whitelist_uid)
+	if (dev->devx_whitelist_uid) {
+		mlx5_ib_devx_cleanup_event_table(dev);
 		mlx5_ib_devx_destroy(dev, dev->devx_whitelist_uid);
+	}
 }
 
 void __mlx5_ib_remove(struct mlx5_ib_dev *dev,
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index 0bfc14ff8aed..e28189a1519b 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -943,6 +943,13 @@ struct mlx5_ib_pf_eq {
 	mempool_t *pool;
 };
 
+struct mlx5_devx_event_table {
+	struct mlx5_nb devx_nb;
+	/* serialize updating the event_xa */
+	struct mutex event_xa_lock;
+	struct xarray event_xa;
+};
+
 struct mlx5_ib_dev {
 	struct ib_device		ib_dev;
 	struct mlx5_core_dev		*mdev;
@@ -993,6 +1000,7 @@ struct mlx5_ib_dev {
 	struct mlx5_srq_table   srq_table;
 	struct mlx5_async_ctx   async_ctx;
 	int			free_port;
+	struct mlx5_devx_event_table devx_event_table;
 };
 
 static inline struct mlx5_ib_cq *to_mibcq(struct mlx5_core_cq *mcq)
@@ -1332,6 +1340,8 @@ void mlx5_ib_put_native_port_mdev(struct mlx5_ib_dev *dev,
 #if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS)
 int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, bool is_user);
 void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev, u16 uid);
+void mlx5_ib_devx_init_event_table(struct mlx5_ib_dev *dev);
+void mlx5_ib_devx_cleanup_event_table(struct mlx5_ib_dev *dev);
 const struct uverbs_object_tree_def *mlx5_ib_get_devx_tree(void);
 extern const struct uapi_definition mlx5_ib_devx_defs[];
 extern const struct uapi_definition mlx5_ib_flow_defs[];
@@ -1348,6 +1358,8 @@ static inline int
 mlx5_ib_devx_create(struct mlx5_ib_dev *dev,
 			   bool is_user) { return -EOPNOTSUPP; }
 static inline void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev, u16 uid) {}
+static inline void mlx5_ib_devx_init_event_table(struct mlx5_ib_dev *dev) {}
+static inline void mlx5_ib_devx_cleanup_event_table(struct mlx5_ib_dev *dev) {}
 static inline bool mlx5_ib_devx_is_flow_dest(void *obj, int *dest_id,
 					     int *dest_type)
 {
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH rdma-next 10/12] IB/mlx5: Enable subscription for device events over DEVX
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (8 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH rdma-next 09/12] IB/mlx5: Register DEVX with mlx5_core to get async events Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH rdma-next 11/12] IB/mlx5: Implement DEVX dispatching event Leon Romanovsky
  2019-06-13  6:46 ` [PATCH rdma-next 12/12] IB/mlx5: Add DEVX support for CQ events Leon Romanovsky
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Enable subscription for device events over DEVX.

Each subscription is added to the two level XA data structure according
to its event number and the DEVX object information in case was given
with the given target fd.

Those events will be reported over the given fd once will occur.
Downstream patches will mange the dispatching to any subscription.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/devx.c        | 535 ++++++++++++++++++++++-
 include/uapi/rdma/mlx5_user_ioctl_cmds.h |   9 +
 2 files changed, 540 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index e9b9ba5a3e9a..f48004b3d494 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -14,6 +14,7 @@
 #include <linux/mlx5/driver.h>
 #include <linux/mlx5/fs.h>
 #include "mlx5_ib.h"
+#include <linux/xarray.h>
 
 #define UVERBS_MODULE_NAME mlx5_ib
 #include <rdma/uverbs_named_ioctl.h>
@@ -33,6 +34,36 @@ struct devx_async_data {
 	struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;
 };
 
+/* first level XA value data structure */
+struct devx_event {
+	struct xarray object_ids; /* second XA level, Key = object id */
+	struct list_head unaffiliated_list;
+};
+
+/* second level XA value data structure */
+struct devx_obj_event {
+	struct rcu_head rcu;
+	struct list_head obj_sub_list;
+};
+
+struct devx_event_subscription {
+	struct list_head file_list; /* headed in private_data->
+				     * subscribed_events_list
+				     */
+	struct list_head xa_list; /* headed in devx_event->unaffiliated_list or
+				   * devx_obj_event->obj_sub_list
+				   */
+	struct list_head obj_list; /* headed in devx_object */
+
+	u32 xa_key_level1;
+	u32 xa_key_level2;
+	struct rcu_head	rcu;
+	u64 cookie;
+	bool is_obj_related;
+	struct ib_uobject *fd_uobj;
+	struct eventfd_ctx *eventfd;
+};
+
 struct devx_async_event_queue {
 	spinlock_t		lock;
 	wait_queue_head_t	poll_wait;
@@ -62,6 +93,7 @@ struct devx_obj {
 		struct mlx5_ib_devx_mr	devx_mr;
 		struct mlx5_core_dct	core_dct;
 	};
+	struct list_head event_sub; /* holds devx_event_subscription entries */
 };
 
 struct devx_umem {
@@ -167,6 +199,105 @@ bool mlx5_ib_devx_is_flow_counter(void *obj, u32 *counter_id)
 	return false;
 }
 
+static bool is_legacy_unaffiliated_event_num(u16 event_num)
+{
+	switch (event_num) {
+	case MLX5_EVENT_TYPE_PORT_CHANGE:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool is_legacy_obj_event_num(u16 event_num)
+{
+	switch (event_num) {
+	case MLX5_EVENT_TYPE_PATH_MIG:
+	case MLX5_EVENT_TYPE_COMM_EST:
+	case MLX5_EVENT_TYPE_SQ_DRAINED:
+	case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
+	case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
+	case MLX5_EVENT_TYPE_CQ_ERROR:
+	case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
+	case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
+	case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
+	case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
+	case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
+	case MLX5_EVENT_TYPE_DCT_DRAINED:
+	case MLX5_EVENT_TYPE_COMP:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static u16 get_legacy_obj_type(u16 opcode)
+{
+	switch (opcode) {
+	case MLX5_CMD_OP_CREATE_RQ:
+	case MLX5_CMD_OP_CREATE_XRC_SRQ:
+		return MLX5_EVENT_QUEUE_TYPE_RQ;
+	case MLX5_CMD_OP_CREATE_QP:
+		return MLX5_EVENT_QUEUE_TYPE_QP;
+	case MLX5_CMD_OP_CREATE_SQ:
+		return MLX5_EVENT_QUEUE_TYPE_SQ;
+	case MLX5_CMD_OP_CREATE_DCT:
+		return MLX5_EVENT_QUEUE_TYPE_DCT;
+	default:
+		return 0;
+	}
+}
+
+static u16 get_dec_obj_type(struct devx_obj *obj, u16 event_num)
+{
+	u16 opcode;
+
+	opcode = (obj->obj_id >> 32) & 0xffff;
+
+	if (is_legacy_obj_event_num(event_num))
+		return get_legacy_obj_type(opcode);
+
+	switch (opcode) {
+	case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
+		return (obj->obj_id >> 48);
+	case MLX5_CMD_OP_CREATE_RQ:
+		return MLX5_OBJ_TYPE_RQ;
+	case MLX5_CMD_OP_CREATE_QP:
+		return MLX5_OBJ_TYPE_QP;
+	case MLX5_CMD_OP_CREATE_SQ:
+		return MLX5_OBJ_TYPE_SQ;
+	case MLX5_CMD_OP_CREATE_DCT:
+		return MLX5_OBJ_TYPE_DCT;
+	case MLX5_CMD_OP_CREATE_TIR:
+		return MLX5_OBJ_TYPE_TIR;
+	case MLX5_CMD_OP_CREATE_TIS:
+		return MLX5_OBJ_TYPE_TIS;
+	case MLX5_CMD_OP_CREATE_PSV:
+		return MLX5_OBJ_TYPE_PSV;
+	case MLX5_OBJ_TYPE_MKEY:
+		return MLX5_OBJ_TYPE_MKEY;
+	case MLX5_CMD_OP_CREATE_RMP:
+		return MLX5_OBJ_TYPE_RMP;
+	case MLX5_CMD_OP_CREATE_XRC_SRQ:
+		return MLX5_OBJ_TYPE_XRC_SRQ;
+	case MLX5_CMD_OP_CREATE_XRQ:
+		return MLX5_OBJ_TYPE_XRQ;
+	case MLX5_CMD_OP_CREATE_RQT:
+		return MLX5_OBJ_TYPE_RQT;
+	case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
+		return MLX5_OBJ_TYPE_FLOW_COUNTER;
+	case MLX5_CMD_OP_CREATE_CQ:
+		return MLX5_OBJ_TYPE_CQ;
+	default:
+		return 0;
+	}
+}
+
+static u32 get_dec_obj_id(u64 obj_id)
+{
+	return (obj_id & 0xffffffff);
+}
+
 /*
  * As the obj_id in the firmware is not globally unique the object type
  * must be considered upon checking for a valid object id.
@@ -1148,9 +1279,16 @@ static int devx_obj_cleanup(struct ib_uobject *uobject,
 			    struct uverbs_attr_bundle *attrs)
 {
 	u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
+	struct mlx5_devx_event_table *devx_event_table;
 	struct devx_obj *obj = uobject->object;
+	struct devx_event_subscription *sub_entry, *tmp;
+	struct devx_obj_event *xa_val_level2;
+	struct devx_event *event;
+	struct mlx5_ib_dev *dev;
+	u32 obj_id;
 	int ret;
 
+	dev = mlx5_udata_to_mdev(&attrs->driver_udata);
 	if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY)
 		devx_cleanup_mkey(obj);
 
@@ -1162,10 +1300,33 @@ static int devx_obj_cleanup(struct ib_uobject *uobject,
 	if (ib_is_destroy_retryable(ret, why, uobject))
 		return ret;
 
-	if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
-		struct mlx5_ib_dev *dev =
-			mlx5_udata_to_mdev(&attrs->driver_udata);
+	devx_event_table = &dev->devx_event_table;
+	obj_id = get_dec_obj_id(obj->obj_id);
+
+	mutex_lock(&devx_event_table->event_xa_lock);
+
+	list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list) {
+		list_del_rcu(&sub_entry->obj_list);
+		list_del_rcu(&sub_entry->xa_list);
+		list_del_rcu(&sub_entry->file_list);
+
+		/* check whether key level 1 for this obj_sub_list is empty */
+		event = xa_load(&devx_event_table->event_xa,
+				sub_entry->xa_key_level1);
+		WARN_ON(!event);
 
+		xa_val_level2 = xa_load(&event->object_ids, obj_id);
+		if (list_empty(&xa_val_level2->obj_sub_list)) {
+			xa_erase(&event->object_ids, obj_id);
+			kfree_rcu(xa_val_level2, rcu);
+		}
+
+		kfree_rcu(sub_entry, rcu);
+	}
+
+	mutex_unlock(&devx_event_table->event_xa_lock);
+
+	if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
 		call_srcu(&dev->mr_srcu, &obj->devx_mr.rcu,
 			  devx_free_indirect_mkey);
 		return ret;
@@ -1237,6 +1398,7 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
 
 	uobj->object = obj;
 	obj->mdev = dev->mdev;
+	INIT_LIST_HEAD(&obj->event_sub);
 	devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
 				   &obj_id);
 	WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
@@ -1523,6 +1685,349 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)(
 	return err;
 }
 
+static void
+subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table,
+			   u32 key_level1,
+			   u32 key_level2,
+			   struct devx_obj_event *alloc_obj_event)
+{
+	struct devx_event *event;
+
+	/* Level 1 is valid for future use - no need to free */
+	if (!alloc_obj_event)
+		return;
+
+	event = xa_load(&devx_event_table->event_xa, key_level1);
+	WARN_ON(!event);
+
+	xa_erase(&event->object_ids, key_level2);
+	kfree(alloc_obj_event);
+}
+
+static int
+subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table,
+			 u32 key_level1,
+			 bool is_level2,
+			 u32 key_level2,
+			 struct devx_obj_event **alloc_obj_event)
+{
+	struct devx_obj_event *obj_event;
+	struct devx_event *event;
+	bool new_entry_level1 = false;
+	int err;
+
+	event = xa_load(&devx_event_table->event_xa, key_level1);
+	if (!event) {
+		event = kzalloc(sizeof(*event), GFP_KERNEL);
+		if (!event)
+			return -ENOMEM;
+
+		new_entry_level1 = true;
+		INIT_LIST_HEAD(&event->unaffiliated_list);
+		xa_init(&event->object_ids);
+
+		err = xa_insert(&devx_event_table->event_xa,
+				key_level1,
+				event,
+				GFP_KERNEL);
+		if (err)
+			goto end;
+	}
+
+	if (!is_level2)
+		return 0;
+
+	obj_event = xa_load(&event->object_ids, key_level2);
+	if (!obj_event) {
+		err = xa_reserve(&event->object_ids, key_level2, GFP_KERNEL);
+		if (err)
+			goto err_level1;
+
+		obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL);
+		if (!obj_event) {
+			err = -ENOMEM;
+			goto err_level2;
+		}
+
+		INIT_LIST_HEAD(&obj_event->obj_sub_list);
+		*alloc_obj_event = obj_event;
+	}
+
+	return 0;
+
+err_level2:
+	xa_erase(&event->object_ids, key_level2);
+
+err_level1:
+	if (new_entry_level1)
+		xa_erase(&devx_event_table->event_xa, key_level1);
+end:
+	if (new_entry_level1)
+		kfree(event);
+	return err;
+}
+
+static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,
+				   struct devx_obj *obj)
+{
+	int i;
+
+	for (i = 0; i < num_events; i++) {
+		if (obj) {
+			if (!is_legacy_obj_event_num(event_type_num_list[i]))
+				return false;
+		} else if (!is_legacy_unaffiliated_event_num(
+				event_type_num_list[i])) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+#define MAX_SUPP_EVENT_NUM 255
+static bool is_valid_events(struct mlx5_core_dev *dev,
+			    int num_events, u16 *event_type_num_list,
+			    struct devx_obj *obj)
+{
+	__be64 *aff_events;
+	__be64 *unaff_events;
+	int mask_entry;
+	int mask_bit;
+	int i;
+
+	if (MLX5_CAP_GEN(dev, event_cap)) {
+		aff_events = MLX5_CAP_DEV_EVENT(dev,
+						user_affiliated_events);
+		unaff_events = MLX5_CAP_DEV_EVENT(dev,
+						  user_unaffiliated_events);
+	} else {
+		return is_valid_events_legacy(num_events, event_type_num_list,
+					      obj);
+	}
+
+	for (i = 0; i < num_events; i++) {
+		if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM)
+			return false;
+
+		mask_entry = event_type_num_list[i] / 64;
+		mask_bit = event_type_num_list[i] % 64;
+
+		if (obj) {
+			/* CQ completion */
+			if (event_type_num_list[i] == 0)
+				continue;
+
+			if (!(be64_to_cpu(aff_events[mask_entry]) &
+					(1ull << mask_bit)))
+				return false;
+
+			continue;
+		}
+
+		if (!(be64_to_cpu(unaff_events[mask_entry]) &
+				(1ull << mask_bit)))
+			return false;
+	}
+
+	return true;
+}
+
+#define MAX_NUM_EVENTS 16
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
+	struct uverbs_attr_bundle *attrs)
+{
+	struct ib_uobject *devx_uobj = uverbs_attr_get_uobject(
+				attrs,
+				MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE);
+	struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
+		&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
+	struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
+	struct ib_uobject *fd_uobj;
+	struct devx_obj *obj = NULL;
+	struct devx_async_event_file *ev_file;
+	struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table;
+	u16 *event_type_num_list;
+	struct devx_event_subscription **event_sub_arr;
+	struct devx_obj_event  **event_obj_array_alloc;
+	int redirect_fd;
+	bool use_eventfd = false;
+	int num_events;
+	int num_alloc_xa_entries = 0;
+	u16 obj_type = 0;
+	u64 cookie = 0;
+	u32 obj_id = 0;
+	int err;
+	int i;
+
+	if (!c->devx_uid)
+		return -EINVAL;
+
+	if (!IS_ERR(devx_uobj)) {
+		obj = (struct devx_obj *)devx_uobj->object;
+		if (obj)
+			obj_id = get_dec_obj_id(obj->obj_id);
+	}
+
+	fd_uobj = uverbs_attr_get_uobject(attrs,
+				MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE);
+	if (IS_ERR(fd_uobj))
+		return PTR_ERR(fd_uobj);
+
+	ev_file = container_of(fd_uobj, struct devx_async_event_file,
+			       uobj);
+
+	if (uverbs_attr_is_valid(attrs,
+				 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) {
+		err = uverbs_copy_from(&redirect_fd, attrs,
+			       MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM);
+		if (err)
+			return err;
+
+		use_eventfd = true;
+	}
+
+	if (uverbs_attr_is_valid(attrs,
+				 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) {
+		if (use_eventfd)
+			return -EINVAL;
+
+		err = uverbs_copy_from(&cookie, attrs,
+				MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE);
+		if (err)
+			return err;
+	}
+
+	num_events = uverbs_attr_ptr_get_array_size(
+		attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
+		sizeof(u16));
+
+	if (num_events < 0)
+		return num_events;
+
+	if (num_events > MAX_NUM_EVENTS)
+		return -EINVAL;
+
+	event_type_num_list = uverbs_attr_get_alloced_ptr(attrs,
+			MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST);
+
+	if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj))
+		return -EINVAL;
+
+	event_sub_arr = uverbs_zalloc(attrs,
+		MAX_NUM_EVENTS * sizeof(struct devx_event_subscription *));
+	event_obj_array_alloc = uverbs_zalloc(attrs,
+		MAX_NUM_EVENTS * sizeof(struct devx_obj_event *));
+
+	if (!event_sub_arr || !event_obj_array_alloc)
+		return -ENOMEM;
+
+	/* Protect from concurrent subscriptions to same XA entries to allow
+	 * both to succeed
+	 */
+	mutex_lock(&devx_event_table->event_xa_lock);
+	for (i = 0; i < num_events; i++) {
+		u32 key_level1;
+
+		if (obj)
+			obj_type = get_dec_obj_type(obj,
+						    event_type_num_list[i]);
+		key_level1 = event_type_num_list[i] | obj_type << 16;
+
+		err = subscribe_event_xa_alloc(devx_event_table,
+					       key_level1,
+					       obj ? true : false,
+					       obj_id,
+					       &event_obj_array_alloc[i]);
+		if (err)
+			goto err;
+
+		num_alloc_xa_entries++;
+		event_sub_arr[i] = kzalloc(sizeof(*event_sub_arr[i]),
+					   GFP_KERNEL);
+		if (!event_sub_arr[i])
+			goto err;
+
+		if (use_eventfd) {
+			event_sub_arr[i]->eventfd =
+				eventfd_ctx_fdget(redirect_fd);
+
+			if (IS_ERR(event_sub_arr[i]->eventfd)) {
+				err = PTR_ERR(event_sub_arr[i]->eventfd);
+				event_sub_arr[i]->eventfd = NULL;
+				goto err;
+			}
+		}
+
+		event_sub_arr[i]->cookie = cookie;
+		event_sub_arr[i]->fd_uobj = fd_uobj;
+		/* May be needed upon cleanup the devx object/subscription */
+		event_sub_arr[i]->xa_key_level1 = key_level1;
+		event_sub_arr[i]->xa_key_level2 = obj_id;
+		event_sub_arr[i]->is_obj_related = obj ? true : false;
+	}
+
+	/* Once all the allocations and the reservations for level 2
+	 * have been done we can go ahead and insert the data without any
+	 * concern of a failure.
+	 */
+	for (i = 0; i < num_events; i++) {
+		struct devx_event *event;
+		struct devx_obj_event  *obj_event;
+
+		spin_lock_irq(&ev_file->ev_queue.lock);
+		list_add_tail_rcu(&event_sub_arr[i]->file_list,
+				  &ev_file->subscribed_events_list);
+		spin_unlock_irq(&ev_file->ev_queue.lock);
+
+		event = xa_load(&devx_event_table->event_xa,
+				event_sub_arr[i]->xa_key_level1);
+		WARN_ON(!event);
+
+		if (!obj) {
+			list_add_tail_rcu(&event_sub_arr[i]->xa_list,
+					  &event->unaffiliated_list);
+			continue;
+		}
+
+		/* If was no entry prior calling this API need to insert
+		 * this XA key level 2 entry.
+		 */
+		if (event_obj_array_alloc[i]) {
+			err = xa_err(xa_store(&event->object_ids, obj_id,
+					      event_obj_array_alloc[i],
+					      GFP_KERNEL));
+			WARN_ON(err);
+		}
+
+		obj_event = xa_load(&event->object_ids, obj_id);
+		WARN_ON(!obj_event);
+		list_add_tail_rcu(&event_sub_arr[i]->xa_list,
+				  &obj_event->obj_sub_list);
+		list_add_tail_rcu(&event_sub_arr[i]->obj_list,
+				  &obj->event_sub);
+	}
+
+	mutex_unlock(&devx_event_table->event_xa_lock);
+	return 0;
+
+err:
+	for (i = 0; i < num_alloc_xa_entries; i++) {
+		subscribe_event_xa_dealloc(devx_event_table,
+					   event_sub_arr[i]->xa_key_level1,
+					   obj_id,
+					   event_obj_array_alloc[i]);
+
+		if (event_sub_arr[i]->eventfd)
+			eventfd_ctx_put(event_sub_arr[i]->eventfd);
+
+		kvfree(event_sub_arr[i]);
+	}
+
+	mutex_unlock(&devx_event_table->event_xa_lock);
+	return err;
+}
+
 static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
 			 struct uverbs_attr_bundle *attrs,
 			 struct devx_umem *obj)
@@ -1980,10 +2485,32 @@ DECLARE_UVERBS_NAMED_METHOD(
 		UVERBS_ATTR_TYPE(u64),
 		UA_MANDATORY));
 
+DECLARE_UVERBS_NAMED_METHOD(
+	MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
+	UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE,
+		MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
+		UVERBS_ACCESS_READ,
+		UA_MANDATORY),
+	UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
+		MLX5_IB_OBJECT_DEVX_OBJ,
+		UVERBS_ACCESS_READ,
+		UA_OPTIONAL),
+	UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
+		UVERBS_ATTR_MIN_SIZE(sizeof(u16)),
+		UA_MANDATORY,
+		UA_ALLOC_AND_COPY),
+	UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
+		UVERBS_ATTR_TYPE(u64),
+		UA_OPTIONAL),
+	UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
+		UVERBS_ATTR_TYPE(u32),
+		UA_OPTIONAL));
+
 DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
 			      &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
 			      &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
-			      &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN));
+			      &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN),
+			      &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT));
 
 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
 			    UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
diff --git a/include/uapi/rdma/mlx5_user_ioctl_cmds.h b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
index 6ad8f4f11ddd..d0da070cf0ab 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
@@ -51,6 +51,7 @@ enum mlx5_ib_devx_methods {
 	MLX5_IB_METHOD_DEVX_OTHER  = (1U << UVERBS_ID_NS_SHIFT),
 	MLX5_IB_METHOD_DEVX_QUERY_UAR,
 	MLX5_IB_METHOD_DEVX_QUERY_EQN,
+	MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
 };
 
 enum  mlx5_ib_devx_other_attrs {
@@ -93,6 +94,14 @@ enum mlx5_ib_devx_obj_query_async_attrs {
 	MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN,
 };
 
+enum mlx5_ib_devx_subscribe_event_attrs {
+	MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
+	MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
+	MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
+	MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
+	MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
+};
+
 enum  mlx5_ib_devx_query_eqn_attrs {
 	MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC = (1U << UVERBS_ID_NS_SHIFT),
 	MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH rdma-next 11/12] IB/mlx5: Implement DEVX dispatching event
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (9 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH rdma-next 10/12] IB/mlx5: Enable subscription for device events over DEVX Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  2019-06-13  6:46 ` [PATCH rdma-next 12/12] IB/mlx5: Add DEVX support for CQ events Leon Romanovsky
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Implement DEVX dispatching event by looking up for the applicable
subscriptions for the reported event and using their target fd to
signal/set the event.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/devx.c         | 365 +++++++++++++++++++++-
 include/uapi/rdma/mlx5_user_ioctl_verbs.h |   5 +
 2 files changed, 367 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index f48004b3d494..b96420021b1d 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -34,6 +34,11 @@ struct devx_async_data {
 	struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;
 };
 
+struct devx_async_event_data {
+	struct list_head list; /* headed in ev_queue->event_list */
+	struct mlx5_ib_uapi_devx_async_event_hdr hdr;
+};
+
 /* first level XA value data structure */
 struct devx_event {
 	struct xarray object_ids; /* second XA level, Key = object id */
@@ -54,6 +59,7 @@ struct devx_event_subscription {
 				   * devx_obj_event->obj_sub_list
 				   */
 	struct list_head obj_list; /* headed in devx_object */
+	struct list_head event_list; /* headed in ev_queue->event_list */
 
 	u32 xa_key_level1;
 	u32 xa_key_level2;
@@ -70,6 +76,7 @@ struct devx_async_event_queue {
 	struct list_head	event_list;
 	atomic_t		bytes_in_use;
 	u8			is_destroyed:1;
+	u8			is_overflow_err:1;
 	u32			flags;
 };
 
@@ -293,6 +300,46 @@ static u16 get_dec_obj_type(struct devx_obj *obj, u16 event_num)
 	}
 }
 
+/* Any future affiliated event should have a fixed header to get the obj
+ * type and id including events on legacy objects.
+ */
+static u32 get_affiliated_event_obj_id(struct mlx5_eqe *eqe)
+{
+	u32 obj_id = MLX5_GET(affiliated_event_header, eqe, obj_id);
+
+	return obj_id;
+}
+
+static u16 get_affiliated_event_obj_type(struct mlx5_eqe *eqe)
+{
+	u16 obj_type = MLX5_GET(affiliated_event_header, eqe, obj_type);
+
+	return obj_type;
+}
+
+static u16 get_event_obj_type(unsigned long event_type, struct mlx5_eqe *eqe)
+{
+	switch (event_type) {
+	case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
+	case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
+	case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
+	case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
+	case MLX5_EVENT_TYPE_PATH_MIG:
+	case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
+	case MLX5_EVENT_TYPE_COMM_EST:
+	case MLX5_EVENT_TYPE_SQ_DRAINED:
+	case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
+	case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
+		return eqe->data.qp_srq.type;
+	case MLX5_EVENT_TYPE_CQ_ERROR:
+		return 0;
+	case MLX5_EVENT_TYPE_DCT_DRAINED:
+		return MLX5_EVENT_QUEUE_TYPE_DCT;
+	default:
+		return get_affiliated_event_obj_type(eqe);
+	}
+}
+
 static u32 get_dec_obj_id(u64 obj_id)
 {
 	return (obj_id & 0xffffffff);
@@ -1965,6 +2012,7 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
 		event_sub_arr[i]->xa_key_level1 = key_level1;
 		event_sub_arr[i]->xa_key_level2 = obj_id;
 		event_sub_arr[i]->is_obj_related = obj ? true : false;
+		INIT_LIST_HEAD(&event_sub_arr[i]->event_list);
 	}
 
 	/* Once all the allocations and the reservations for level 2
@@ -2175,10 +2223,174 @@ static int devx_umem_cleanup(struct ib_uobject *uobject,
 	return 0;
 }
 
+static bool is_unaffiliated_event(struct mlx5_core_dev *dev,
+				  unsigned long event_type)
+{
+	__be64 *unaff_events;
+	int mask_entry;
+	int mask_bit;
+
+	if (!MLX5_CAP_GEN(dev, event_cap))
+		return is_legacy_unaffiliated_event_num(event_type);
+
+	unaff_events = MLX5_CAP_DEV_EVENT(dev,
+					  user_unaffiliated_events);
+	WARN_ON(event_type > MAX_SUPP_EVENT_NUM);
+
+	mask_entry = event_type / 64;
+	mask_bit = event_type % 64;
+
+	if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit)))
+		return false;
+
+	return true;
+}
+
+static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data)
+{
+	struct mlx5_eqe *eqe = data;
+	u32 obj_id = 0;
+
+	switch (event_type) {
+	case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
+	case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
+	case MLX5_EVENT_TYPE_PATH_MIG:
+	case MLX5_EVENT_TYPE_COMM_EST:
+	case MLX5_EVENT_TYPE_SQ_DRAINED:
+	case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
+	case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
+	case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
+	case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
+	case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
+		obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
+		break;
+	case MLX5_EVENT_TYPE_DCT_DRAINED:
+		obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
+		break;
+	case MLX5_EVENT_TYPE_CQ_ERROR:
+		obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
+		break;
+	default:
+		obj_id = get_affiliated_event_obj_id(data);
+		break;
+	}
+
+	return obj_id;
+}
+
+static int deliver_event(struct devx_event_subscription *event_sub,
+			 const void *data)
+{
+	struct ib_uobject *fd_uobj = event_sub->fd_uobj;
+	struct devx_async_event_file *ev_file;
+	struct devx_async_event_queue *ev_queue;
+	struct devx_async_event_data *event_data;
+	unsigned long flags;
+	bool omit_data;
+
+	ev_file = container_of(fd_uobj, struct devx_async_event_file,
+			       uobj);
+	ev_queue = &ev_file->ev_queue;
+	omit_data = ev_queue->flags &
+		MLX5_IB_UAPI_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA;
+
+	if (omit_data) {
+		spin_lock_irqsave(&ev_queue->lock, flags);
+		if (!list_empty(&event_sub->event_list)) {
+			spin_unlock_irqrestore(&ev_queue->lock, flags);
+			return 0;
+		}
+
+		list_add_tail(&event_sub->event_list, &ev_queue->event_list);
+		spin_unlock_irqrestore(&ev_queue->lock, flags);
+		wake_up_interruptible(&ev_queue->poll_wait);
+		return 0;
+	}
+
+	event_data = kzalloc(sizeof(*event_data) +
+			     (omit_data ? 0 : sizeof(struct mlx5_eqe)),
+			     GFP_ATOMIC);
+	if (!event_data) {
+		spin_lock_irqsave(&ev_queue->lock, flags);
+		ev_queue->is_overflow_err = 1;
+		spin_unlock_irqrestore(&ev_queue->lock, flags);
+		return -ENOMEM;
+	}
+
+	event_data->hdr.cookie = event_sub->cookie;
+	memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe));
+
+	spin_lock_irqsave(&ev_queue->lock, flags);
+	list_add_tail(&event_data->list, &ev_queue->event_list);
+	spin_unlock_irqrestore(&ev_queue->lock, flags);
+	wake_up_interruptible(&ev_queue->poll_wait);
+
+	return 0;
+}
+
+static void dispatch_event_fd(struct list_head *fd_list,
+			      const void *data)
+{
+	struct devx_event_subscription *item;
+
+	list_for_each_entry_rcu(item, fd_list, xa_list) {
+		if (!get_file_rcu((struct file *)item->fd_uobj->object))
+			continue;
+
+		if (item->eventfd) {
+			eventfd_signal(item->eventfd, 1);
+			fput(item->fd_uobj->object);
+			continue;
+		}
+
+		deliver_event(item, data);
+		fput(item->fd_uobj->object);
+	}
+}
+
 static int devx_event_notifier(struct notifier_block *nb,
 			       unsigned long event_type, void *data)
 {
-	return NOTIFY_DONE;
+	struct mlx5_devx_event_table *table;
+	struct mlx5_ib_dev *dev;
+	struct devx_event *event;
+	struct devx_obj_event *obj_event;
+	u16 obj_type = 0;
+	bool is_unaffiliated;
+	u32 obj_id;
+
+	/* Explicit filtering to kernel events which may occur frequently */
+	if (event_type == MLX5_EVENT_TYPE_CMD ||
+	    event_type == MLX5_EVENT_TYPE_PAGE_REQUEST)
+		return NOTIFY_OK;
+
+	table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb);
+	dev = container_of(table, struct mlx5_ib_dev, devx_event_table);
+	is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type);
+
+	if (!is_unaffiliated)
+		obj_type = get_event_obj_type(event_type, data);
+	event = xa_load(&table->event_xa, event_type | (obj_type << 16));
+	if (!event)
+		return NOTIFY_DONE;
+
+	if (is_unaffiliated) {
+		dispatch_event_fd(&event->unaffiliated_list, data);
+		return NOTIFY_OK;
+	}
+
+	obj_id = devx_get_obj_id_from_event(event_type, data);
+	rcu_read_lock();
+	obj_event = xa_load(&event->object_ids, obj_id);
+	if (!obj_event) {
+		rcu_read_unlock();
+		return NOTIFY_DONE;
+	}
+
+	dispatch_event_fd(&obj_event->obj_sub_list, data);
+
+	rcu_read_unlock();
+	return NOTIFY_OK;
 }
 
 void mlx5_ib_devx_init_event_table(struct mlx5_ib_dev *dev)
@@ -2306,17 +2518,153 @@ static const struct file_operations devx_async_cmd_event_fops = {
 static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
 				     size_t count, loff_t *pos)
 {
-	return -EINVAL;
+	struct devx_async_event_file *ev_file = filp->private_data;
+	struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
+	struct devx_event_subscription *event_sub;
+	struct devx_async_event_data *uninitialized_var(event);
+	int ret = 0;
+	size_t eventsz;
+	bool omit_data;
+	void *event_data;
+
+	omit_data = ev_queue->flags &
+		MLX5_IB_UAPI_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA;
+
+	spin_lock_irq(&ev_queue->lock);
+
+	if (ev_queue->is_overflow_err) {
+		ev_queue->is_overflow_err = 0;
+		spin_unlock_irq(&ev_queue->lock);
+		return -EOVERFLOW;
+	}
+
+	while (list_empty(&ev_queue->event_list)) {
+		spin_unlock_irq(&ev_queue->lock);
+
+		if (filp->f_flags & O_NONBLOCK)
+			return -EAGAIN;
+
+		if (wait_event_interruptible(ev_queue->poll_wait,
+			    (!list_empty(&ev_queue->event_list) ||
+			     ev_queue->is_destroyed))) {
+			return -ERESTARTSYS;
+		}
+
+		if (list_empty(&ev_queue->event_list) &&
+		    ev_queue->is_destroyed)
+			return -EIO;
+
+		spin_lock_irq(&ev_queue->lock);
+	}
+
+	if (omit_data) {
+		event_sub = list_first_entry(&ev_queue->event_list,
+					struct devx_event_subscription,
+					event_list);
+		eventsz = sizeof(event_sub->cookie);
+		event_data = &event_sub->cookie;
+	} else {
+		event = list_first_entry(&ev_queue->event_list,
+				      struct devx_async_event_data, list);
+		eventsz = sizeof(struct mlx5_eqe) +
+			sizeof(struct mlx5_ib_uapi_devx_async_event_hdr);
+		event_data = &event->hdr;
+	}
+
+	if (eventsz > count) {
+		spin_unlock_irq(&ev_queue->lock);
+		return -ENOSPC;
+	}
+
+	if (omit_data)
+		list_del_init(&event_sub->event_list);
+	else
+		list_del(&event->list);
+
+	spin_unlock_irq(&ev_queue->lock);
+
+	if (copy_to_user(buf, event_data, eventsz))
+		ret = -EFAULT;
+	else
+		ret = eventsz;
+
+	if (!omit_data)
+		kfree(event);
+	return ret;
 }
 
 static __poll_t devx_async_event_poll(struct file *filp,
 				      struct poll_table_struct *wait)
 {
-	return 0;
+	struct devx_async_event_file *ev_file = filp->private_data;
+	struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
+	__poll_t pollflags = 0;
+
+	poll_wait(filp, &ev_queue->poll_wait, wait);
+
+	spin_lock_irq(&ev_queue->lock);
+	if (ev_queue->is_destroyed)
+		pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
+	else if (!list_empty(&ev_queue->event_list))
+		pollflags = EPOLLIN | EPOLLRDNORM;
+	spin_unlock_irq(&ev_queue->lock);
+
+	return pollflags;
 }
 
 static int devx_async_event_close(struct inode *inode, struct file *filp)
 {
+	struct ib_uobject *uobj = filp->private_data;
+	struct devx_async_event_file *ev_file =
+		container_of(uobj, struct devx_async_event_file, uobj);
+	struct devx_event_subscription *event_sub, *event_sub_tmp;
+	struct devx_async_event_data *entry, *tmp;
+
+	mutex_lock(&ev_file->dev->devx_event_table.event_xa_lock);
+	/* delete the subscriptions which are related to this FD */
+	list_for_each_entry_safe(event_sub, event_sub_tmp,
+				 &ev_file->subscribed_events_list, file_list) {
+		list_del_rcu(&event_sub->file_list);
+		list_del_rcu(&event_sub->xa_list);
+		if (event_sub->is_obj_related) {
+			struct devx_event *event;
+			struct devx_obj_event *xa_val_level2;
+
+			list_del_rcu(&event_sub->obj_list);
+
+			/* check whether the key level 1 for this obj_sub_list
+			 * is empty
+			 */
+			event = xa_load(
+				&ev_file->dev->devx_event_table.event_xa,
+				event_sub->xa_key_level1);
+			WARN_ON(!event);
+
+			xa_val_level2 = xa_load(&event->object_ids,
+						event_sub->xa_key_level2);
+			if (list_empty(&xa_val_level2->obj_sub_list)) {
+				xa_erase(&event->object_ids,
+					 event_sub->xa_key_level2);
+				kfree_rcu(xa_val_level2, rcu);
+			}
+		}
+
+		if (event_sub->eventfd)
+			eventfd_ctx_put(event_sub->eventfd);
+
+		kfree_rcu(event_sub, rcu);
+	}
+	mutex_unlock(&ev_file->dev->devx_event_table.event_xa_lock);
+
+	/* free the pending events allocation */
+	if (!(ev_file->ev_queue.flags &
+	    MLX5_IB_UAPI_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA)) {
+		spin_lock_irq(&ev_file->ev_queue.lock);
+		list_for_each_entry_safe(entry, tmp,
+					 &ev_file->ev_queue.event_list, list)
+			kfree(entry); /* read can't come any nore */
+		spin_unlock_irq(&ev_file->ev_queue.lock);
+	}
 	uverbs_close_fd(filp);
 	return 0;
 }
@@ -2351,6 +2699,17 @@ static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj,
 static int devx_hot_unplug_async_event_file(struct ib_uobject *uobj,
 					    enum rdma_remove_reason why)
 {
+	struct devx_async_event_file *ev_file =
+		container_of(uobj, struct devx_async_event_file,
+			     uobj);
+	struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
+
+	spin_lock_irq(&ev_queue->lock);
+	ev_queue->is_destroyed = 1;
+	spin_unlock_irq(&ev_queue->lock);
+
+	if (why == RDMA_REMOVE_DRIVER_REMOVE)
+		wake_up_interruptible(&ev_queue->poll_wait);
 	return 0;
 };
 
diff --git a/include/uapi/rdma/mlx5_user_ioctl_verbs.h b/include/uapi/rdma/mlx5_user_ioctl_verbs.h
index 57beea4589e4..9500ff7363ef 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_verbs.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_verbs.h
@@ -67,5 +67,10 @@ enum mlx5_ib_uapi_devx_create_event_channel_flags {
 	MLX5_IB_UAPI_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA = 1 << 0,
 };
 
+struct mlx5_ib_uapi_devx_async_event_hdr {
+	__aligned_u64	cookie;
+	__u8		out_data[];
+};
+
 #endif
 
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
* [PATCH rdma-next 12/12] IB/mlx5: Add DEVX support for CQ events
       [not found] <20190613064639.30898-1-leon@kernel.org>
                   ` (10 preceding siblings ...)
  2019-06-13  6:46 ` [PATCH rdma-next 11/12] IB/mlx5: Implement DEVX dispatching event Leon Romanovsky
@ 2019-06-13  6:46 ` Leon Romanovsky
  11 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:46 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Add DEVX support for CQ events by creating and destroying the CQ via
mlx5_core and set an handler to manage its completions.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/devx.c | 40 +++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index b96420021b1d..c24c483d0d95 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -19,9 +19,12 @@
 #define UVERBS_MODULE_NAME mlx5_ib
 #include <rdma/uverbs_named_ioctl.h>
 
+static void dispatch_event_fd(struct list_head *fd_list, const void *data);
+
 enum devx_obj_flags {
 	DEVX_OBJ_FLAGS_INDIRECT_MKEY = 1 << 0,
 	DEVX_OBJ_FLAGS_DCT = 1 << 1,
+	DEVX_OBJ_FLAGS_CQ = 1 << 2,
 };
 
 struct devx_async_data {
@@ -92,6 +95,7 @@ struct devx_async_event_file {
 #define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in)
 struct devx_obj {
 	struct mlx5_core_dev	*mdev;
+	struct mlx5_ib_dev	*ib_dev;
 	u64			obj_id;
 	u32			dinlen; /* destroy inbox length */
 	u32			dinbox[MLX5_MAX_DESTROY_INBOX_SIZE_DW];
@@ -99,6 +103,7 @@ struct devx_obj {
 	union {
 		struct mlx5_ib_devx_mr	devx_mr;
 		struct mlx5_core_dct	core_dct;
+		struct mlx5_core_cq	core_cq;
 	};
 	struct list_head event_sub; /* holds devx_event_subscription entries */
 };
@@ -1341,6 +1346,8 @@ static int devx_obj_cleanup(struct ib_uobject *uobject,
 
 	if (obj->flags & DEVX_OBJ_FLAGS_DCT)
 		ret = mlx5_core_destroy_dct(obj->mdev, &obj->core_dct);
+	else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
+		ret = mlx5_core_destroy_cq(obj->mdev, &obj->core_cq);
 	else
 		ret = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out,
 				    sizeof(out));
@@ -1383,6 +1390,30 @@ static int devx_obj_cleanup(struct ib_uobject *uobject,
 	return ret;
 }
 
+static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
+{
+	struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq);
+	struct mlx5_devx_event_table *table;
+	struct devx_event *event;
+	struct devx_obj_event *obj_event;
+	u32 obj_id = mcq->cqn;
+
+	table = &obj->ib_dev->devx_event_table;
+	event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP);
+	if (!event)
+		return;
+
+	rcu_read_lock();
+	obj_event = xa_load(&event->object_ids, obj_id);
+	if (!obj_event) {
+		rcu_read_unlock();
+		return;
+	}
+
+	dispatch_event_fd(&obj_event->obj_sub_list, eqe);
+	rcu_read_unlock();
+}
+
 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
 	struct uverbs_attr_bundle *attrs)
 {
@@ -1434,6 +1465,12 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
 		err = mlx5_core_create_dct(dev->mdev, &obj->core_dct,
 					   cmd_in, cmd_in_len,
 					   cmd_out, cmd_out_len);
+	} else if (opcode == MLX5_CMD_OP_CREATE_CQ) {
+		obj->flags |= DEVX_OBJ_FLAGS_CQ;
+		obj->core_cq.comp = devx_cq_comp;
+		err = mlx5_core_create_cq(dev->mdev, &obj->core_cq,
+					  cmd_in, cmd_in_len, cmd_out,
+					  cmd_out_len);
 	} else {
 		err = mlx5_cmd_exec(dev->mdev, cmd_in,
 				    cmd_in_len,
@@ -1446,6 +1483,7 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
 	uobj->object = obj;
 	obj->mdev = dev->mdev;
 	INIT_LIST_HEAD(&obj->event_sub);
+	obj->ib_dev = dev;
 	devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
 				   &obj_id);
 	WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
@@ -1473,6 +1511,8 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
 obj_destroy:
 	if (obj->flags & DEVX_OBJ_FLAGS_DCT)
 		mlx5_core_destroy_dct(obj->mdev, &obj->core_dct);
+	else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
+		mlx5_core_destroy_cq(obj->mdev, &obj->core_cq);
 	else
 		mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out,
 			      sizeof(out));
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
[parent not found: <20190613062640.28958-1-leon@kernel.org>]
* [PATCH rdma-next 08/12] IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD
       [not found] <20190613062640.28958-1-leon@kernel.org>
@ 2019-06-13  6:26 ` Leon Romanovsky
  0 siblings, 0 replies; 13+ messages in thread
From: Leon Romanovsky @ 2019-06-13  6:26 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Leon Romanovsky, RDMA mailing list, Saeed Mahameed, Yishai Hadas,
	linux-netdev

From: Yishai Hadas <yishaih@mellanox.com>

Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD and its initial
implementation.

This object is from type class FD and will be used to read DEVX
async events.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/devx.c         | 112 ++++++++++++++++++++--
 include/uapi/rdma/mlx5_user_ioctl_cmds.h  |  10 ++
 include/uapi/rdma/mlx5_user_ioctl_verbs.h |   4 +
 3 files changed, 116 insertions(+), 10 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index 80b42d069328..1815ce0f8daf 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -33,6 +33,24 @@ struct devx_async_data {
 	struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;
 };
 
+struct devx_async_event_queue {
+	spinlock_t		lock;
+	wait_queue_head_t	poll_wait;
+	struct list_head	event_list;
+	atomic_t		bytes_in_use;
+	u8			is_destroyed:1;
+	u32			flags;
+};
+
+struct devx_async_event_file {
+	struct ib_uobject		uobj;
+	struct list_head subscribed_events_list; /* Head of events that are
+						  * subscribed to this FD
+						  */
+	struct devx_async_event_queue	ev_queue;
+	struct mlx5_ib_dev *dev;
+};
+
 #define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in)
 struct devx_obj {
 	struct mlx5_core_dev	*mdev;
@@ -1336,27 +1354,21 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
 			      cmd_out, cmd_out_len);
 }
 
-struct devx_async_event_queue {
-	spinlock_t		lock;
-	wait_queue_head_t	poll_wait;
-	struct list_head	event_list;
-	atomic_t		bytes_in_use;
-	u8			is_destroyed:1;
-};
-
 struct devx_async_cmd_event_file {
 	struct ib_uobject		uobj;
 	struct devx_async_event_queue	ev_queue;
 	struct mlx5_async_ctx		async_ctx;
 };
 
-static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
+static void devx_init_event_queue(struct devx_async_event_queue *ev_queue,
+				  u32 flags)
 {
 	spin_lock_init(&ev_queue->lock);
 	INIT_LIST_HEAD(&ev_queue->event_list);
 	init_waitqueue_head(&ev_queue->poll_wait);
 	atomic_set(&ev_queue->bytes_in_use, 0);
 	ev_queue->is_destroyed = 0;
+	ev_queue->flags = flags;
 }
 
 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
@@ -1370,11 +1382,38 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
 
 	ev_file = container_of(uobj, struct devx_async_cmd_event_file,
 			       uobj);
-	devx_init_event_queue(&ev_file->ev_queue);
+	devx_init_event_queue(&ev_file->ev_queue, 0);
 	mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
 	return 0;
 }
 
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
+	struct uverbs_attr_bundle *attrs)
+{
+	struct ib_uobject *uobj = uverbs_attr_get_uobject(
+		attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
+	struct devx_async_event_file *ev_file;
+	struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
+		&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
+	struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
+	u32 flags;
+	int err;
+
+	err = uverbs_get_flags32(&flags, attrs,
+		MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
+		MLX5_IB_UAPI_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA);
+
+	if (err)
+		return err;
+
+	ev_file = container_of(uobj, struct devx_async_event_file,
+			       uobj);
+	devx_init_event_queue(&ev_file->ev_queue, flags);
+	INIT_LIST_HEAD(&ev_file->subscribed_events_list);
+	ev_file->dev = dev;
+	return 0;
+}
+
 static void devx_query_callback(int status, struct mlx5_async_work *context)
 {
 	struct devx_async_data *async_data =
@@ -1729,6 +1768,32 @@ static const struct file_operations devx_async_cmd_event_fops = {
 	.llseek	 = no_llseek,
 };
 
+static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
+				     size_t count, loff_t *pos)
+{
+	return -EINVAL;
+}
+
+static __poll_t devx_async_event_poll(struct file *filp,
+				      struct poll_table_struct *wait)
+{
+	return 0;
+}
+
+static int devx_async_event_close(struct inode *inode, struct file *filp)
+{
+	uverbs_close_fd(filp);
+	return 0;
+}
+
+static const struct file_operations devx_async_event_fops = {
+	.owner	 = THIS_MODULE,
+	.read	 = devx_async_event_read,
+	.poll    = devx_async_event_poll,
+	.release = devx_async_event_close,
+	.llseek	 = no_llseek,
+};
+
 static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj,
 						   enum rdma_remove_reason why)
 {
@@ -1748,6 +1813,12 @@ static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj,
 	return 0;
 };
 
+static int devx_hot_unplug_async_event_file(struct ib_uobject *uobj,
+					    enum rdma_remove_reason why)
+{
+	return 0;
+};
+
 DECLARE_UVERBS_NAMED_METHOD(
 	MLX5_IB_METHOD_DEVX_UMEM_REG,
 	UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
@@ -1913,6 +1984,24 @@ DECLARE_UVERBS_NAMED_OBJECT(
 			     O_RDONLY),
 	&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
 
+DECLARE_UVERBS_NAMED_METHOD(
+	MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
+	UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
+			MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
+			UVERBS_ACCESS_NEW,
+			UA_MANDATORY),
+	UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
+			enum mlx5_ib_uapi_devx_create_event_channel_flags,
+			UA_MANDATORY));
+
+DECLARE_UVERBS_NAMED_OBJECT(
+	MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
+	UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
+			     devx_hot_unplug_async_event_file,
+			     &devx_async_event_fops, "[devx_async_event]",
+			     O_RDONLY),
+	&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
+
 static bool devx_is_supported(struct ib_device *device)
 {
 	struct mlx5_ib_dev *dev = to_mdev(device);
@@ -1933,5 +2022,8 @@ const struct uapi_definition mlx5_ib_devx_defs[] = {
 	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
 		MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
 		UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
+	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
+		MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
+		UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
 	{},
 };
diff --git a/include/uapi/rdma/mlx5_user_ioctl_cmds.h b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
index d404c951954c..6ad8f4f11ddd 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
@@ -127,16 +127,26 @@ enum mlx5_ib_devx_async_cmd_fd_alloc_attrs {
 	MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
 };
 
+enum mlx5_ib_devx_async_event_fd_alloc_attrs {
+	MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
+	MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
+};
+
 enum mlx5_ib_devx_async_cmd_fd_methods {
 	MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC = (1U << UVERBS_ID_NS_SHIFT),
 };
 
+enum mlx5_ib_devx_async_event_fd_methods {
+	MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC = (1U << UVERBS_ID_NS_SHIFT),
+};
+
 enum mlx5_ib_objects {
 	MLX5_IB_OBJECT_DEVX = (1U << UVERBS_ID_NS_SHIFT),
 	MLX5_IB_OBJECT_DEVX_OBJ,
 	MLX5_IB_OBJECT_DEVX_UMEM,
 	MLX5_IB_OBJECT_FLOW_MATCHER,
 	MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
+	MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
 };
 
 enum mlx5_ib_flow_matcher_create_attrs {
diff --git a/include/uapi/rdma/mlx5_user_ioctl_verbs.h b/include/uapi/rdma/mlx5_user_ioctl_verbs.h
index a8f34c237458..57beea4589e4 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_verbs.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_verbs.h
@@ -63,5 +63,9 @@ enum mlx5_ib_uapi_dm_type {
 	MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM,
 };
 
+enum mlx5_ib_uapi_devx_create_event_channel_flags {
+	MLX5_IB_UAPI_DEVX_CREATE_EVENT_CHANNEL_FLAGS_OMIT_EV_DATA = 1 << 0,
+};
+
 #endif
 
-- 
2.20.1

^ permalink raw reply related	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2019-06-13  6:46 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <20190613064639.30898-1-leon@kernel.org>
2019-06-13  6:46 ` [PATCH mlx5-next 01/12] net/mlx5: Fix mlx5_core_destroy_cq() error flow Leon Romanovsky
2019-06-13  6:46 ` [PATCH mlx5-next 02/12] net/mlx5: Use event mask based on device capabilities Leon Romanovsky
2019-06-13  6:46 ` [PATCH mlx5-next 03/12] net/mlx5: Expose the API to register for ANY event Leon Romanovsky
2019-06-13  6:46 ` [PATCH mlx5-next 04/12] net/mlx5: mlx5_core_create_cq() enhancements Leon Romanovsky
2019-06-13  6:46 ` [PATCH mlx5-next 05/12] net/mlx5: Report a CQ error event only when a handler was set Leon Romanovsky
2019-06-13  6:46 ` [PATCH mlx5-next 06/12] net/mlx5: Report EQE data upon CQ completion Leon Romanovsky
2019-06-13  6:46 ` [PATCH mlx5-next 07/12] net/mlx5: Expose device definitions for object events Leon Romanovsky
2019-06-13  6:46 ` [PATCH rdma-next 08/12] IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD Leon Romanovsky
2019-06-13  6:46 ` [PATCH rdma-next 09/12] IB/mlx5: Register DEVX with mlx5_core to get async events Leon Romanovsky
2019-06-13  6:46 ` [PATCH rdma-next 10/12] IB/mlx5: Enable subscription for device events over DEVX Leon Romanovsky
2019-06-13  6:46 ` [PATCH rdma-next 11/12] IB/mlx5: Implement DEVX dispatching event Leon Romanovsky
2019-06-13  6:46 ` [PATCH rdma-next 12/12] IB/mlx5: Add DEVX support for CQ events Leon Romanovsky
     [not found] <20190613062640.28958-1-leon@kernel.org>
2019-06-13  6:26 ` [PATCH rdma-next 08/12] IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD Leon Romanovsky

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