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Commit 7701707c authored by Saeed Mahameed's avatar Saeed Mahameed Committed by Leon Romanovsky
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net/mlx5: EQ, Generic EQ 

Add mlx5_eq_{create/destroy}_generic APIs and EQE access methods, for
mlx5 core consumers generic EQs.

This API will be used in downstream patch to move page fault (RDMA ODP)
EQ logic into mlx5_ib rdma driver, hence it will use a generic EQ.

Current mlx5 EQ allocation scheme:
On load mlx5 allocates 4 (for async) + #cores (for data completions)
MSIX vectors, mlx5 core will assign 3 MSIX vectors for internal async
EQs and will use all of the #cores MSIX vectors for completion EQs,
(One vector is going to be reserved for a generic EQ).

After this patch an external user (e.g mlx5_ib) of mlx5_core
can use this new API to create new generic EQs with the reserved msix
vector index for that eq.
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
parent 16d76083
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Showing with 221 additions and 73 deletions
drivers/net/ethernet/mellanox/mlx5/core/eq.c
View file @ 7701707c
......@@ -33,6 +33,7 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/eq.h>
#include <linux/mlx5/cmd.h>
#ifdef CONFIG_RFS_ACCEL
#include <linux/cpu_rmap.h>
......@@ -69,6 +70,7 @@ enum {
struct mlx5_irq_info {
cpumask_var_t mask;
char name[MLX5_MAX_IRQ_NAME];
void *context; /* dev_id provided to request_irq */
};
struct mlx5_eq_table {
......@@ -81,7 +83,6 @@ struct mlx5_eq_table {
struct mlx5_eq_pagefault pfault_eq;
#endif
struct mutex lock; /* sync async eqs creations */
u8 num_async_eqs;
int num_comp_vectors;
struct mlx5_irq_info *irq_info;
#ifdef CONFIG_RFS_ACCEL
......@@ -229,19 +230,19 @@ static void eqe_pf_action(struct work_struct *work)
work);
struct mlx5_eq_pagefault *eq = pfault->eq;
mlx5_core_page_fault(eq->core.dev, pfault);
mlx5_core_page_fault(eq->core->dev, pfault);
mempool_free(pfault, eq->pool);
}
static void eq_pf_process(struct mlx5_eq_pagefault *eq)
{
struct mlx5_core_dev *dev = eq->core.dev;
struct mlx5_core_dev *dev = eq->core->dev;
struct mlx5_eqe_page_fault *pf_eqe;
struct mlx5_pagefault *pfault;
struct mlx5_eqe *eqe;
int set_ci = 0;
while ((eqe = next_eqe_sw(&eq->core))) {
while ((eqe = next_eqe_sw(eq->core))) {
pfault = mempool_alloc(eq->pool, GFP_ATOMIC);
if (!pfault) {
schedule_work(&eq->work);
......@@ -316,16 +317,16 @@ static void eq_pf_process(struct mlx5_eq_pagefault *eq)
INIT_WORK(&pfault->work, eqe_pf_action);
queue_work(eq->wq, &pfault->work);
++eq->core.cons_index;
++eq->core->cons_index;
++set_ci;
if (unlikely(set_ci >= MLX5_NUM_SPARE_EQE)) {
eq_update_ci(&eq->core, 0);
eq_update_ci(eq->core, 0);
set_ci = 0;
}
}
eq_update_ci(&eq->core, 1);
eq_update_ci(eq->core, 1);
}
static irqreturn_t mlx5_eq_pf_int(int irq, void *eq_ptr)
......@@ -368,6 +369,7 @@ static void eq_pf_action(struct work_struct *work)
static int
create_pf_eq(struct mlx5_core_dev *dev, struct mlx5_eq_pagefault *eq)
{
struct mlx5_eq_param param = {};
int err;
spin_lock_init(&eq->lock);
......@@ -386,11 +388,19 @@ create_pf_eq(struct mlx5_core_dev *dev, struct mlx5_eq_pagefault *eq)
goto err_mempool;
}
err = mlx5_create_async_eq(dev, &eq->core, MLX5_NUM_ASYNC_EQE,
1 << MLX5_EVENT_TYPE_PAGE_FAULT,
"mlx5_page_fault_eq", mlx5_eq_pf_int);
if (err)
param = (struct mlx5_eq_param) {
.index = MLX5_EQ_PFAULT_IDX,
.mask = 1 << MLX5_EVENT_TYPE_PAGE_FAULT,
.nent = MLX5_NUM_ASYNC_EQE,
.context = eq,
.handler = mlx5_eq_pf_int
};
eq->core = mlx5_eq_create_generic(dev, "mlx5_page_fault_eq", &param);
if (IS_ERR(eq->core)) {
err = PTR_ERR(eq->core);
goto err_wq;
}
return 0;
err_wq:
......@@ -404,7 +414,7 @@ static int destroy_pf_eq(struct mlx5_core_dev *dev, struct mlx5_eq_pagefault *eq
{
int err;
err = mlx5_destroy_async_eq(dev, &eq->core);
err = mlx5_eq_destroy_generic(dev, eq->core);
cancel_work_sync(&eq->work);
destroy_workqueue(eq->wq);
mempool_destroy(eq->pool);
......@@ -710,25 +720,29 @@ static void init_eq_buf(struct mlx5_eq *eq)
}
static int
mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
int nent, u64 mask, const char *name, irq_handler_t handler)
create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, const char *name,
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;
u8 vecidx = param->index;
__be64 *pas;
void *eqc;
int inlen;
u32 *in;
int err;
if (eq_table->irq_info[vecidx].context)
return -EEXIST;
/* Init CQ table */
memset(cq_table, 0, sizeof(*cq_table));
spin_lock_init(&cq_table->lock);
INIT_RADIX_TREE(&cq_table->tree, GFP_ATOMIC);
eq->nent = roundup_pow_of_two(nent + MLX5_NUM_SPARE_EQE);
eq->nent = roundup_pow_of_two(param->nent + MLX5_NUM_SPARE_EQE);
eq->cons_index = 0;
err = mlx5_buf_alloc(dev, eq->nent * MLX5_EQE_SIZE, &eq->buf);
if (err)
......@@ -749,7 +763,7 @@ mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
mlx5_fill_page_array(&eq->buf, pas);
MLX5_SET(create_eq_in, in, opcode, MLX5_CMD_OP_CREATE_EQ);
MLX5_SET64(create_eq_in, in, event_bitmask, mask);
MLX5_SET64(create_eq_in, in, event_bitmask, param->mask);
eqc = MLX5_ADDR_OF(create_eq_in, in, eq_context_entry);
MLX5_SET(eqc, eqc, log_eq_size, ilog2(eq->nent));
......@@ -764,13 +778,15 @@ mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
snprintf(eq_table->irq_info[vecidx].name, MLX5_MAX_IRQ_NAME, "%s@pci:%s",
name, pci_name(dev->pdev));
eq_table->irq_info[vecidx].context = param->context;
eq->vecidx = vecidx;
eq->eqn = MLX5_GET(create_eq_out, out, eq_number);
eq->irqn = pci_irq_vector(dev->pdev, vecidx);
eq->dev = dev;
eq->doorbell = priv->uar->map + MLX5_EQ_DOORBEL_OFFSET;
err = request_irq(eq->irqn, handler, 0,
eq_table->irq_info[vecidx].name, eq);
err = request_irq(eq->irqn, param->handler, 0,
eq_table->irq_info[vecidx].name, param->context);
if (err)
goto err_eq;
......@@ -799,12 +815,19 @@ mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
return err;
}
static int mlx5_destroy_unmap_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
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);
free_irq(eq->irqn, eq);
free_irq(eq->irqn, irq_info->context);
irq_info->context = NULL;
err = mlx5_cmd_destroy_eq(dev, eq->eqn);
if (err)
mlx5_core_warn(dev, "failed to destroy a previously created eq: eqn %d\n",
......@@ -883,48 +906,38 @@ void mlx5_eq_table_cleanup(struct mlx5_core_dev *dev)
/* Async EQs */
int mlx5_create_async_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
int nent, u64 mask, const char *name, irq_handler_t handler)
static int create_async_eq(struct mlx5_core_dev *dev, const char *name,
struct mlx5_eq *eq, struct mlx5_eq_param *param)
{
struct mlx5_eq_table *eq_table = dev->priv.eq_table;
u8 vecdix;
int err;
mutex_lock(&eq_table->lock);
if (eq_table->num_async_eqs >= MLX5_EQ_MAX_ASYNC_EQS) {
if (param->index >= MLX5_EQ_MAX_ASYNC_EQS) {
err = -ENOSPC;
goto unlock;
}
vecdix = eq_table->num_async_eqs + 1;
err = mlx5_create_map_eq(dev, eq, vecdix, nent, mask, name, handler);
if (!err)
eq_table->num_async_eqs++;
err = create_map_eq(dev, eq, name, param);
unlock:
mutex_unlock(&eq_table->lock);
return err;
}
int mlx5_destroy_async_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
static int destroy_async_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
{
struct mlx5_eq_table *eq_table = dev->priv.eq_table;
int err;
mutex_lock(&eq_table->lock);
err = mlx5_destroy_unmap_eq(dev, eq);
if (!err)
eq_table->num_async_eqs--;
err = destroy_unmap_eq(dev, eq);
mutex_unlock(&eq_table->lock);
return err;
}
static int create_async_eqs(struct mlx5_core_dev *dev)
static u64 gather_async_events_mask(struct mlx5_core_dev *dev)
{
struct mlx5_eq_table *table = dev->priv.eq_table;
u64 async_event_mask = MLX5_ASYNC_EVENT_MASK;
int err;
if (MLX5_VPORT_MANAGER(dev))
async_event_mask |= (1ull << MLX5_EVENT_TYPE_NIC_VPORT_CHANGE);
......@@ -953,9 +966,23 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
if (MLX5_CAP_MCAM_REG(dev, tracer_registers))
async_event_mask |= (1ull << MLX5_EVENT_TYPE_DEVICE_TRACER);
err = mlx5_create_async_eq(dev, &table->cmd_eq, MLX5_NUM_CMD_EQE,
1ull << MLX5_EVENT_TYPE_CMD, "mlx5_cmd_eq",
mlx5_eq_async_int);
return async_event_mask;
}
static int create_async_eqs(struct mlx5_core_dev *dev)
{
struct mlx5_eq_table *table = dev->priv.eq_table;
struct mlx5_eq_param param = {};
int err;
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,
};
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);
return err;
......@@ -963,15 +990,27 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
mlx5_cmd_use_events(dev);
err = mlx5_create_async_eq(dev, &table->async_eq, MLX5_NUM_ASYNC_EQE,
async_event_mask, "mlx5_async_eq", mlx5_eq_async_int);
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,
};
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);
goto err1;
}
err = mlx5_create_async_eq(dev, &table->pages_eq, /* TODO: sriov max_vf + */ 1,
1 << MLX5_EVENT_TYPE_PAGE_REQUEST, "mlx5_pages_eq", mlx5_eq_async_int);
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,
};
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);
goto err2;
......@@ -989,17 +1028,17 @@ static int create_async_eqs(struct mlx5_core_dev *dev)
return err;
err3:
mlx5_destroy_async_eq(dev, &table->pages_eq);
destroy_async_eq(dev, &table->pages_eq);
#else
return err;
#endif
err2:
mlx5_destroy_async_eq(dev, &table->async_eq);
destroy_async_eq(dev, &table->async_eq);
err1:
mlx5_cmd_use_polling(dev);
mlx5_destroy_async_eq(dev, &table->cmd_eq);
destroy_async_eq(dev, &table->cmd_eq);
return err;
}
......@@ -1017,18 +1056,18 @@ static void destroy_async_eqs(struct mlx5_core_dev *dev)
}
#endif
err = mlx5_destroy_async_eq(dev, &table->pages_eq);
err = destroy_async_eq(dev, &table->pages_eq);
if (err)
mlx5_core_err(dev, "failed to destroy pages eq, err(%d)\n",
err);
err = mlx5_destroy_async_eq(dev, &table->async_eq);
err = destroy_async_eq(dev, &table->async_eq);
if (err)
mlx5_core_err(dev, "failed to destroy async eq, err(%d)\n",
err);
mlx5_cmd_use_polling(dev);
err = mlx5_destroy_async_eq(dev, &table->cmd_eq);
err = destroy_async_eq(dev, &table->cmd_eq);
if (err)
mlx5_core_err(dev, "failed to destroy command eq, err(%d)\n",
err);
......@@ -1049,6 +1088,77 @@ void mlx5_eq_synchronize_cmd_irq(struct mlx5_core_dev *dev)
synchronize_irq(dev->priv.eq_table->cmd_eq.irqn);
}
/* Generic EQ API for mlx5_core consumers
* Needed For RDMA ODP EQ for now
*/
struct mlx5_eq *
mlx5_eq_create_generic(struct mlx5_core_dev *dev, const char *name,
struct mlx5_eq_param *param)
{
struct mlx5_eq *eq = kvzalloc(sizeof(*eq), GFP_KERNEL);
int err;
if (!eq)
return ERR_PTR(-ENOMEM);
err = create_async_eq(dev, name, eq, param);
if (err) {
kvfree(eq);
eq = ERR_PTR(err);
}
return eq;
}
EXPORT_SYMBOL(mlx5_eq_create_generic);
int mlx5_eq_destroy_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
{
int err;
if (IS_ERR(eq))
return -EINVAL;
err = destroy_async_eq(dev, eq);
if (err)
goto out;
kvfree(eq);
out:
return err;
}
EXPORT_SYMBOL(mlx5_eq_destroy_generic);
struct mlx5_eqe *mlx5_eq_get_eqe(struct mlx5_eq *eq, u32 cc)
{
u32 ci = eq->cons_index + cc;
struct mlx5_eqe *eqe;
eqe = get_eqe(eq, ci & (eq->nent - 1));
eqe = ((eqe->owner & 1) ^ !!(ci & eq->nent)) ? NULL : eqe;
/* Make sure we read EQ entry contents after we've
* checked the ownership bit.
*/
if (eqe)
dma_rmb();
return eqe;
}
EXPORT_SYMBOL(mlx5_eq_get_eqe);
void mlx5_eq_update_ci(struct mlx5_eq *eq, u32 cc, bool arm)
{
__be32 __iomem *addr = eq->doorbell + (arm ? 0 : 2);
u32 val;
eq->cons_index += cc;
val = (eq->cons_index & 0xffffff) | (eq->eqn << 24);
__raw_writel((__force u32)cpu_to_be32(val), addr);
/* We still want ordering, just not swabbing, so add a barrier */
mb();
}
EXPORT_SYMBOL(mlx5_eq_update_ci);
/* Completion EQs */
static int set_comp_irq_affinity_hint(struct mlx5_core_dev *mdev, int i)
......@@ -1127,7 +1237,7 @@ static void destroy_comp_eqs(struct mlx5_core_dev *dev)
#endif
list_for_each_entry_safe(eq, n, &table->comp_eqs_list, list) {
list_del(&eq->list);
if (mlx5_destroy_unmap_eq(dev, &eq->core))
if (destroy_unmap_eq(dev, &eq->core))
mlx5_core_warn(dev, "failed to destroy comp EQ 0x%x\n",
eq->core.eqn);
tasklet_disable(&eq->tasklet_ctx.task);
......@@ -1155,6 +1265,7 @@ static int create_comp_eqs(struct mlx5_core_dev *dev)
#endif
for (i = 0; i < ncomp_vec; i++) {
int vecidx = i + MLX5_EQ_VEC_COMP_BASE;
struct mlx5_eq_param param = {};
eq = kzalloc(sizeof(*eq), GFP_KERNEL);
if (!eq) {
......@@ -1172,8 +1283,14 @@ static int create_comp_eqs(struct mlx5_core_dev *dev)
irq_cpu_rmap_add(table->rmap, pci_irq_vector(dev->pdev, vecidx));
#endif
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_comp%d", i);
err = mlx5_create_map_eq(dev, &eq->core, vecidx, nent, 0,
name, mlx5_eq_comp_int);
param = (struct mlx5_eq_param) {
.index = vecidx,
.mask = 0,
.nent = nent,
.context = &eq->core,
.handler = mlx5_eq_comp_int
};
err = create_map_eq(dev, &eq->core, name, &param);
if (err) {
kfree(eq);
goto clean;
......@@ -1257,7 +1374,7 @@ struct mlx5_eq_comp *mlx5_eqn2comp_eq(struct mlx5_core_dev *dev, int eqn)
void mlx5_core_eq_free_irqs(struct mlx5_core_dev *dev)
{
struct mlx5_eq_table *table = dev->priv.eq_table;
struct mlx5_eq_comp *eq;
int i, max_eqs;
clear_comp_irqs_affinity_hints(dev);
......@@ -1267,16 +1384,16 @@ void mlx5_core_eq_free_irqs(struct mlx5_core_dev *dev)
table->rmap = NULL;
}
#endif
list_for_each_entry(eq, &table->comp_eqs_list, list)
free_irq(eq->core.irqn, eq);
free_irq(table->pages_eq.irqn, &table->pages_eq);
free_irq(table->async_eq.irqn, &table->async_eq);
free_irq(table->cmd_eq.irqn, &table->cmd_eq);
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
if (MLX5_CAP_GEN(dev, pg))
free_irq(table->pfault_eq.core.irqn, &table->pfault_eq.core);
#endif
mutex_lock(&table->lock); /* sync with create/destroy_async_eq */
max_eqs = table->num_comp_vectors + MLX5_EQ_VEC_COMP_BASE;
for (i = max_eqs - 1; i >= 0; i--) {
if (!table->irq_info[i].context)
continue;
free_irq(pci_irq_vector(dev->pdev, i), table->irq_info[i].context);
table->irq_info[i].context = NULL;
}
mutex_unlock(&table->lock);
pci_free_irq_vectors(dev->pdev);
}
......
drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h
View file @ 7701707c
......@@ -7,11 +7,6 @@
#define MLX5_MAX_IRQ_NAME (32)
enum {
MLX5_EQ_MAX_ASYNC_EQS = 4, /* mlx5_core needs at least 3 */
MLX5_EQ_VEC_COMP_BASE = MLX5_EQ_MAX_ASYNC_EQS,
};
struct mlx5_eq_tasklet {
struct list_head list;
struct list_head process_list;
......@@ -31,6 +26,7 @@ struct mlx5_eq {
u32 cons_index;
struct mlx5_frag_buf buf;
int size;
unsigned int vecidx;
unsigned int irqn;
u8 eqn;
int nent;
......@@ -44,7 +40,7 @@ struct mlx5_eq_comp {
};
struct mlx5_eq_pagefault {
struct mlx5_eq core; /* Must be first */
struct mlx5_eq *core;
struct work_struct work;
spinlock_t lock; /* Pagefaults spinlock */
struct workqueue_struct *wq;
......@@ -55,10 +51,6 @@ int mlx5_eq_table_init(struct mlx5_core_dev *dev);
void mlx5_eq_table_cleanup(struct mlx5_core_dev *dev);
int mlx5_eq_table_create(struct mlx5_core_dev *dev);
void mlx5_eq_table_destroy(struct mlx5_core_dev *dev);
int mlx5_create_async_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
int nent, u64 mask, const char *name,
irq_handler_t handler);
int mlx5_destroy_async_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
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);
......
include/linux/mlx5/eq.h 0 → 100644
View file @ 7701707c
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/* Copyright (c) 2018 Mellanox Technologies. */
#ifndef MLX5_CORE_EQ_H
#define MLX5_CORE_EQ_H
#include <linux/mlx5/driver.h>
enum {
MLX5_EQ_PAGEREQ_IDX = 0,
MLX5_EQ_CMD_IDX = 1,
MLX5_EQ_ASYNC_IDX = 2,
/* reserved to be used by mlx5_core ulps (mlx5e/mlx5_ib) */
MLX5_EQ_PFAULT_IDX = 3,
MLX5_EQ_MAX_ASYNC_EQS,
/* completion eqs vector indices start here */
MLX5_EQ_VEC_COMP_BASE = MLX5_EQ_MAX_ASYNC_EQS,
};
struct mlx5_eq;
struct mlx5_eq_param {
u8 index;
int nent;
u64 mask;
void *context;
irq_handler_t handler;
};
struct mlx5_eq *
mlx5_eq_create_generic(struct mlx5_core_dev *dev, const char *name,
struct mlx5_eq_param *param);
int
mlx5_eq_destroy_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
struct mlx5_eqe *mlx5_eq_get_eqe(struct mlx5_eq *eq, u32 cc);
void mlx5_eq_update_ci(struct mlx5_eq *eq, u32 cc, bool arm);
#endif /* MLX5_CORE_EQ_H */
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