diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
commit | 863981e96738983919de841ec669e157e6bdaeb0 (patch) | |
tree | d6d89a12e7eb8017837c057935a2271290907f76 /drivers/net/ethernet/mellanox/mlx5/core/cq.c | |
parent | 8dec7c70575785729a6a9e6719a955e9c545bcab (diff) |
Linux-libre 4.7.1-gnupck-4.7.1-gnu
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/cq.c')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/cq.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cq.c b/drivers/net/ethernet/mellanox/mlx5/core/cq.c index b51e42d6f..873a631ad 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/cq.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cq.c @@ -39,6 +39,53 @@ #include <linux/mlx5/cq.h> #include "mlx5_core.h" +#define TASKLET_MAX_TIME 2 +#define TASKLET_MAX_TIME_JIFFIES msecs_to_jiffies(TASKLET_MAX_TIME) + +void mlx5_cq_tasklet_cb(unsigned long data) +{ + unsigned long flags; + unsigned long end = jiffies + TASKLET_MAX_TIME_JIFFIES; + struct mlx5_eq_tasklet *ctx = (struct mlx5_eq_tasklet *)data; + struct mlx5_core_cq *mcq; + struct mlx5_core_cq *temp; + + spin_lock_irqsave(&ctx->lock, flags); + list_splice_tail_init(&ctx->list, &ctx->process_list); + spin_unlock_irqrestore(&ctx->lock, flags); + + 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); + if (atomic_dec_and_test(&mcq->refcount)) + complete(&mcq->free); + if (time_after(jiffies, end)) + break; + } + + if (!list_empty(&ctx->process_list)) + tasklet_schedule(&ctx->task); +} + +static void mlx5_add_cq_to_tasklet(struct mlx5_core_cq *cq) +{ + unsigned long flags; + struct mlx5_eq_tasklet *tasklet_ctx = cq->tasklet_ctx.priv; + + spin_lock_irqsave(&tasklet_ctx->lock, flags); + /* When migrating CQs between EQs will be implemented, please note + * that you need to sync this point. It is possible that + * while migrating a CQ, completions on the old EQs could + * still arrive. + */ + if (list_empty_careful(&cq->tasklet_ctx.list)) { + atomic_inc(&cq->refcount); + list_add_tail(&cq->tasklet_ctx.list, &tasklet_ctx->list); + } + spin_unlock_irqrestore(&tasklet_ctx->lock, flags); +} + void mlx5_cq_completion(struct mlx5_core_dev *dev, u32 cqn) { struct mlx5_core_cq *cq; @@ -96,6 +143,13 @@ int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, struct mlx5_create_cq_mbox_out out; struct mlx5_destroy_cq_mbox_in din; struct mlx5_destroy_cq_mbox_out dout; + int eqn = MLX5_GET(cqc, MLX5_ADDR_OF(create_cq_in, in, cq_context), + c_eqn); + struct mlx5_eq *eq; + + eq = mlx5_eqn2eq(dev, eqn); + if (IS_ERR(eq)) + return PTR_ERR(eq); in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_CQ); memset(&out, 0, sizeof(out)); @@ -111,6 +165,11 @@ int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, cq->arm_sn = 0; atomic_set(&cq->refcount, 1); init_completion(&cq->free); + if (!cq->comp) + cq->comp = mlx5_add_cq_to_tasklet; + /* assuming CQ will be deleted before the EQ */ + cq->tasklet_ctx.priv = &eq->tasklet_ctx; + INIT_LIST_HEAD(&cq->tasklet_ctx.list); spin_lock_irq(&table->lock); err = radix_tree_insert(&table->tree, cq->cqn, cq); |