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net/mlx5: Separate IRQ request/free from EQ life cycle

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Instead of requesting IRQ with eq creation, IRQs will be requested
before EQ table creation.
Instead of freeing the IRQs after EQ destroy, free IRQs after eq
table destroy.

Signed-off-by: Yuval Avnery <yuvalav@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Yuval Avnery 2019-06-10 23:38:25 +00:00 committed by Saeed Mahameed
parent ca390799c2
commit 24163189da
3 changed files with 84 additions and 42 deletions
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2
drivers/infiniband/hw/mlx5/odp.c
View File

@ -1562,7 +1562,7 @@ mlx5_ib_create_pf_eq(struct mlx5_ib_dev *dev, struct mlx5_ib_pf_eq *eq)
.nent = MLX5_IB_NUM_PF_EQE,
.nb = &eq->irq_nb,
};
eq->core = mlx5_eq_create_generic(dev->mdev, "mlx5_ib_page_fault_eq", &param);
eq->core = mlx5_eq_create_generic(dev->mdev, &param);
if (IS_ERR(eq->core)) {
err = PTR_ERR(eq->core);
goto err_wq;

121
drivers/net/ethernet/mellanox/mlx5/core/eq.c
View File

@ -134,6 +134,64 @@ static irqreturn_t mlx5_irq_int_handler(int irq, void *nh)
return IRQ_HANDLED;
}
static void irq_set_name(char *name, int vecidx)
{
switch (vecidx) {
case MLX5_EQ_CMD_IDX:
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_cmd_eq");
break;
case MLX5_EQ_ASYNC_IDX:
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_async_eq");
break;
case MLX5_EQ_PAGEREQ_IDX:
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_pages_eq");
break;
case MLX5_EQ_PFAULT_IDX:
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_ib_page_fault_eq");
break;
default:
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_comp%d",
vecidx - MLX5_EQ_VEC_COMP_BASE);
break;
}
}
static int request_irqs(struct mlx5_core_dev *dev, int nvec)
{
struct mlx5_priv *priv = &dev->priv;
struct mlx5_eq_table *eq_table;
char name[MLX5_MAX_IRQ_NAME];
int err;
int i;
eq_table = priv->eq_table;
for (i = 0; i < nvec; i++) {
struct mlx5_irq_info *irq_info = &eq_table->irq_info[i];
int irqn = pci_irq_vector(dev->pdev, i);
irq_set_name(name, i);
ATOMIC_INIT_NOTIFIER_HEAD(&irq_info->nh);
snprintf(irq_info->name, MLX5_MAX_IRQ_NAME,
"%s@pci:%s", name, pci_name(dev->pdev));
err = request_irq(irqn, mlx5_irq_int_handler, 0, irq_info->name,
&irq_info->nh);
if (err) {
mlx5_core_err(dev, "Failed to request irq\n");
goto err_request_irq;
}
}
return 0;
err_request_irq:
for (; i >= 0; i--) {
struct mlx5_irq_info *irq_info = &eq_table->irq_info[i];
int irqn = pci_irq_vector(dev->pdev, i);
free_irq(irqn, &irq_info->nh);
}
return err;
}
static int mlx5_cmd_destroy_eq(struct mlx5_core_dev *dev, u8 eqn)
{
u32 out[MLX5_ST_SZ_DW(destroy_eq_out)] = {0};
@ -278,14 +336,12 @@ static void init_eq_buf(struct mlx5_eq *eq)
}
static int
create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, const char *name,
create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
struct mlx5_eq_param *param)
{
struct mlx5_eq_table *eq_table = dev->priv.eq_table;
struct mlx5_cq_table *cq_table = &eq->cq_table;
u32 out[MLX5_ST_SZ_DW(create_eq_out)] = {0};
struct mlx5_priv *priv = &dev->priv;
struct mlx5_irq_info *irq_info;
u8 vecidx = param->index;
__be64 *pas;
void *eqc;
@ -335,11 +391,6 @@ create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, const char *name,
if (err)
goto err_in;
irq_info = mlx5_irq_get(dev, vecidx);
ATOMIC_INIT_NOTIFIER_HEAD(&irq_info->nh);
snprintf(irq_info->name, MLX5_MAX_IRQ_NAME,
"%s@pci:%s", name, pci_name(dev->pdev));
eq->vecidx = vecidx;
eq->eqn = MLX5_GET(create_eq_out, out, eq_number);
eq->irqn = pci_irq_vector(dev->pdev, vecidx);
@ -347,15 +398,10 @@ create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, const char *name,
eq->doorbell = priv->uar->map + MLX5_EQ_DOORBEL_OFFSET;
eq->irq_nb = param->nb;
err = request_irq(eq->irqn, mlx5_irq_int_handler, 0, irq_info->name,
&irq_info->nh);
err = mlx5_irq_attach_nb(mlx5_irq_get(dev, vecidx), param->nb);
if (err)
goto err_eq;
err = mlx5_irq_attach_nb(irq_info, param->nb);
if (err)
goto err_irq;
err = mlx5_debug_eq_add(dev, eq);
if (err)
goto err_detach;
@ -368,10 +414,7 @@ create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, const char *name,
return 0;
err_detach:
mlx5_irq_detach_nb(irq_info, param->nb);
err_irq:
free_irq(eq->irqn, &eq_table->irq_info[vecidx].nh);
mlx5_irq_detach_nb(mlx5_irq_get(dev, vecidx), eq->irq_nb);
err_eq:
mlx5_cmd_destroy_eq(dev, eq->eqn);
@ -386,19 +429,14 @@ err_buf:
static int destroy_unmap_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
{
struct mlx5_eq_table *eq_table = dev->priv.eq_table;
struct mlx5_irq_info *irq_info;
int err;
irq_info = &eq_table->irq_info[eq->vecidx];
mlx5_debug_eq_remove(dev, eq);
err = mlx5_irq_detach_nb(irq_info, eq->irq_nb);
err = mlx5_irq_detach_nb(mlx5_irq_get(dev, eq->vecidx), eq->irq_nb);
if (err)
mlx5_core_warn(eq->dev, "eq failed to detach from irq. err %d",
err);
free_irq(eq->irqn, &eq_table->irq_info[eq->vecidx].nh);
err = mlx5_cmd_destroy_eq(dev, eq->eqn);
if (err)
mlx5_core_warn(dev, "failed to destroy a previously created eq: eqn %d\n",
@ -479,7 +517,7 @@ void mlx5_eq_table_cleanup(struct mlx5_core_dev *dev)
/* Async EQs */
static int create_async_eq(struct mlx5_core_dev *dev, const char *name,
static int create_async_eq(struct mlx5_core_dev *dev,
struct mlx5_eq *eq, struct mlx5_eq_param *param)
{
struct mlx5_eq_table *eq_table = dev->priv.eq_table;
@ -491,7 +529,7 @@ static int create_async_eq(struct mlx5_core_dev *dev, const char *name,
goto unlock;
}
err = create_map_eq(dev, eq, name, param);
err = create_map_eq(dev, eq, param);
unlock:
mutex_unlock(&eq_table->lock);
return err;
@ -596,7 +634,7 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
.nent = MLX5_NUM_CMD_EQE,
.nb = &table->cmd_eq.irq_nb,
};
err = create_async_eq(dev, "mlx5_cmd_eq", &table->cmd_eq.core, &param);
err = create_async_eq(dev, &table->cmd_eq.core, &param);
if (err) {
mlx5_core_warn(dev, "failed to create cmd EQ %d\n", err);
goto err0;
@ -611,8 +649,7 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
.nent = MLX5_NUM_ASYNC_EQE,
.nb = &table->async_eq.irq_nb,
};
err = create_async_eq(dev, "mlx5_async_eq",
&table->async_eq.core, &param);
err = create_async_eq(dev, &table->async_eq.core, &param);
if (err) {
mlx5_core_warn(dev, "failed to create async EQ %d\n", err);
goto err1;
@ -625,8 +662,7 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
.nent = /* TODO: sriov max_vf + */ 1,
.nb = &table->pages_eq.irq_nb,
};
err = create_async_eq(dev, "mlx5_pages_eq",
&table->pages_eq.core, &param);
err = create_async_eq(dev, &table->pages_eq.core, &param);
if (err) {
mlx5_core_warn(dev, "failed to create pages EQ %d\n", err);
goto err2;
@ -689,7 +725,7 @@ void mlx5_eq_synchronize_cmd_irq(struct mlx5_core_dev *dev)
* Needed For RDMA ODP EQ for now
*/
struct mlx5_eq *
mlx5_eq_create_generic(struct mlx5_core_dev *dev, const char *name,
mlx5_eq_create_generic(struct mlx5_core_dev *dev,
struct mlx5_eq_param *param)
{
struct mlx5_eq *eq = kvzalloc(sizeof(*eq), GFP_KERNEL);
@ -698,7 +734,7 @@ mlx5_eq_create_generic(struct mlx5_core_dev *dev, const char *name,
if (!eq)
return ERR_PTR(-ENOMEM);
err = create_async_eq(dev, name, eq, param);
err = create_async_eq(dev, eq, param);
if (err) {
kvfree(eq);
eq = ERR_PTR(err);
@ -845,7 +881,6 @@ static void destroy_comp_eqs(struct mlx5_core_dev *dev)
static int create_comp_eqs(struct mlx5_core_dev *dev)
{
struct mlx5_eq_table *table = dev->priv.eq_table;
char name[MLX5_MAX_IRQ_NAME];
struct mlx5_eq_comp *eq;
int ncomp_vec;
int nent;
@ -879,7 +914,6 @@ static int create_comp_eqs(struct mlx5_core_dev *dev)
#ifdef CONFIG_RFS_ACCEL
irq_cpu_rmap_add(table->rmap, pci_irq_vector(dev->pdev, vecidx));
#endif
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_comp%d", i);
eq->irq_nb.notifier_call = mlx5_eq_comp_int;
param = (struct mlx5_eq_param) {
.index = vecidx,
@ -887,7 +921,7 @@ static int create_comp_eqs(struct mlx5_core_dev *dev)
.nent = nent,
.nb = &eq->irq_nb,
};
err = create_map_eq(dev, &eq->core, name, &param);
err = create_map_eq(dev, &eq->core, &param);
if (err) {
kfree(eq);
goto clean;
@ -1018,8 +1052,14 @@ static int alloc_irq_vectors(struct mlx5_core_dev *dev)
table->num_comp_vectors = nvec - MLX5_EQ_VEC_COMP_BASE;
err = request_irqs(dev, nvec);
if (err)
goto err_free_irqs;
return 0;
err_free_irqs:
pci_free_irq_vectors(dev->pdev);
err_free_irq_info:
kfree(table->irq_info);
return err;
@ -1027,10 +1067,13 @@ err_free_irq_info:
static void free_irq_vectors(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
struct mlx5_eq_table *table = dev->priv.eq_table;
int i;
for (i = 0; i < table->num_comp_vectors + MLX5_EQ_VEC_COMP_BASE; i++)
free_irq(pci_irq_vector(dev->pdev, i), &table->irq_info[i].nh);
pci_free_irq_vectors(dev->pdev);
kfree(priv->eq_table->irq_info);
kfree(table->irq_info);
}
int mlx5_eq_table_create(struct mlx5_core_dev *dev)
@ -1039,7 +1082,7 @@ int mlx5_eq_table_create(struct mlx5_core_dev *dev)
err = alloc_irq_vectors(dev);
if (err) {
mlx5_core_err(dev, "alloc irq vectors failed\n");
mlx5_core_err(dev, "Failed to create IRQ vectors\n");
return err;
}

3
include/linux/mlx5/eq.h
View File

@ -30,8 +30,7 @@ struct mlx5_eq_param {
};
struct mlx5_eq *
mlx5_eq_create_generic(struct mlx5_core_dev *dev, const char *name,
struct mlx5_eq_param *param);
mlx5_eq_create_generic(struct mlx5_core_dev *dev, struct mlx5_eq_param *param);
int
mlx5_eq_destroy_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq);