| // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB |
| /* Copyright (c) 2019 Mellanox Technologies. */ |
| |
| #include <linux/interrupt.h> |
| #include <linux/notifier.h> |
| #include <linux/module.h> |
| #include <linux/mlx5/driver.h> |
| #include "mlx5_core.h" |
| #include "mlx5_irq.h" |
| #include "lib/sf.h" |
| #ifdef CONFIG_RFS_ACCEL |
| #include <linux/cpu_rmap.h> |
| #endif |
| |
| #define MLX5_MAX_IRQ_NAME (32) |
| /* max irq_index is 2047, so four chars */ |
| #define MLX5_MAX_IRQ_IDX_CHARS (4) |
| |
| #define MLX5_SFS_PER_CTRL_IRQ 64 |
| #define MLX5_IRQ_CTRL_SF_MAX 8 |
| /* min num of vectors for SFs to be enabled */ |
| #define MLX5_IRQ_VEC_COMP_BASE_SF 2 |
| |
| #define MLX5_EQ_SHARE_IRQ_MAX_COMP (8) |
| #define MLX5_EQ_SHARE_IRQ_MAX_CTRL (UINT_MAX) |
| #define MLX5_EQ_SHARE_IRQ_MIN_COMP (1) |
| #define MLX5_EQ_SHARE_IRQ_MIN_CTRL (4) |
| #define MLX5_EQ_REFS_PER_IRQ (2) |
| |
| struct mlx5_irq { |
| struct atomic_notifier_head nh; |
| cpumask_var_t mask; |
| char name[MLX5_MAX_IRQ_NAME]; |
| struct mlx5_irq_pool *pool; |
| int refcount; |
| u32 index; |
| int irqn; |
| }; |
| |
| struct mlx5_irq_pool { |
| char name[MLX5_MAX_IRQ_NAME - MLX5_MAX_IRQ_IDX_CHARS]; |
| struct xa_limit xa_num_irqs; |
| struct mutex lock; /* sync IRQs creations */ |
| struct xarray irqs; |
| u32 max_threshold; |
| u32 min_threshold; |
| struct mlx5_core_dev *dev; |
| }; |
| |
| struct mlx5_irq_table { |
| struct mlx5_irq_pool *pf_pool; |
| struct mlx5_irq_pool *sf_ctrl_pool; |
| struct mlx5_irq_pool *sf_comp_pool; |
| }; |
| |
| /** |
| * mlx5_get_default_msix_vec_count - Get the default number of MSI-X vectors |
| * to be ssigned to each VF. |
| * @dev: PF to work on |
| * @num_vfs: Number of enabled VFs |
| */ |
| int mlx5_get_default_msix_vec_count(struct mlx5_core_dev *dev, int num_vfs) |
| { |
| int num_vf_msix, min_msix, max_msix; |
| |
| num_vf_msix = MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix); |
| if (!num_vf_msix) |
| return 0; |
| |
| min_msix = MLX5_CAP_GEN(dev, min_dynamic_vf_msix_table_size); |
| max_msix = MLX5_CAP_GEN(dev, max_dynamic_vf_msix_table_size); |
| |
| /* Limit maximum number of MSI-X vectors so the default configuration |
| * has some available in the pool. This will allow the user to increase |
| * the number of vectors in a VF without having to first size-down other |
| * VFs. |
| */ |
| return max(min(num_vf_msix / num_vfs, max_msix / 2), min_msix); |
| } |
| |
| /** |
| * mlx5_set_msix_vec_count - Set dynamically allocated MSI-X on the VF |
| * @dev: PF to work on |
| * @function_id: Internal PCI VF function IDd |
| * @msix_vec_count: Number of MSI-X vectors to set |
| */ |
| int mlx5_set_msix_vec_count(struct mlx5_core_dev *dev, int function_id, |
| int msix_vec_count) |
| { |
| int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out); |
| int set_sz = MLX5_ST_SZ_BYTES(set_hca_cap_in); |
| void *hca_cap = NULL, *query_cap = NULL, *cap; |
| int num_vf_msix, min_msix, max_msix; |
| int ret; |
| |
| num_vf_msix = MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix); |
| if (!num_vf_msix) |
| return 0; |
| |
| if (!MLX5_CAP_GEN(dev, vport_group_manager) || !mlx5_core_is_pf(dev)) |
| return -EOPNOTSUPP; |
| |
| min_msix = MLX5_CAP_GEN(dev, min_dynamic_vf_msix_table_size); |
| max_msix = MLX5_CAP_GEN(dev, max_dynamic_vf_msix_table_size); |
| |
| if (msix_vec_count < min_msix) |
| return -EINVAL; |
| |
| if (msix_vec_count > max_msix) |
| return -EOVERFLOW; |
| |
| query_cap = kzalloc(query_sz, GFP_KERNEL); |
| hca_cap = kzalloc(set_sz, GFP_KERNEL); |
| if (!hca_cap || !query_cap) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = mlx5_vport_get_other_func_cap(dev, function_id, query_cap); |
| if (ret) |
| goto out; |
| |
| cap = MLX5_ADDR_OF(set_hca_cap_in, hca_cap, capability); |
| memcpy(cap, MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability), |
| MLX5_UN_SZ_BYTES(hca_cap_union)); |
| MLX5_SET(cmd_hca_cap, cap, dynamic_msix_table_size, msix_vec_count); |
| |
| MLX5_SET(set_hca_cap_in, hca_cap, opcode, MLX5_CMD_OP_SET_HCA_CAP); |
| MLX5_SET(set_hca_cap_in, hca_cap, other_function, 1); |
| MLX5_SET(set_hca_cap_in, hca_cap, function_id, function_id); |
| |
| MLX5_SET(set_hca_cap_in, hca_cap, op_mod, |
| MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE << 1); |
| ret = mlx5_cmd_exec_in(dev, set_hca_cap, hca_cap); |
| out: |
| kfree(hca_cap); |
| kfree(query_cap); |
| return ret; |
| } |
| |
| static void irq_release(struct mlx5_irq *irq) |
| { |
| struct mlx5_irq_pool *pool = irq->pool; |
| |
| xa_erase(&pool->irqs, irq->index); |
| /* free_irq requires that affinity and rmap will be cleared |
| * before calling it. This is why there is asymmetry with set_rmap |
| * which should be called after alloc_irq but before request_irq. |
| */ |
| irq_set_affinity_hint(irq->irqn, NULL); |
| free_cpumask_var(irq->mask); |
| free_irq(irq->irqn, &irq->nh); |
| kfree(irq); |
| } |
| |
| static void irq_put(struct mlx5_irq *irq) |
| { |
| struct mlx5_irq_pool *pool = irq->pool; |
| |
| mutex_lock(&pool->lock); |
| irq->refcount--; |
| if (!irq->refcount) |
| irq_release(irq); |
| mutex_unlock(&pool->lock); |
| } |
| |
| static int irq_get_locked(struct mlx5_irq *irq) |
| { |
| lockdep_assert_held(&irq->pool->lock); |
| if (WARN_ON_ONCE(!irq->refcount)) |
| return 0; |
| irq->refcount++; |
| return 1; |
| } |
| |
| static int irq_get(struct mlx5_irq *irq) |
| { |
| int err; |
| |
| mutex_lock(&irq->pool->lock); |
| err = irq_get_locked(irq); |
| mutex_unlock(&irq->pool->lock); |
| return err; |
| } |
| |
| static irqreturn_t irq_int_handler(int irq, void *nh) |
| { |
| atomic_notifier_call_chain(nh, 0, NULL); |
| return IRQ_HANDLED; |
| } |
| |
| static void irq_sf_set_name(struct mlx5_irq_pool *pool, char *name, int vecidx) |
| { |
| snprintf(name, MLX5_MAX_IRQ_NAME, "%s%d", pool->name, vecidx); |
| } |
| |
| static void irq_set_name(struct mlx5_irq_pool *pool, char *name, int vecidx) |
| { |
| if (!pool->xa_num_irqs.max) { |
| /* in case we only have a single irq for the device */ |
| snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_combined%d", vecidx); |
| return; |
| } |
| |
| if (vecidx == pool->xa_num_irqs.max) { |
| snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_async%d", vecidx); |
| return; |
| } |
| |
| snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_comp%d", vecidx); |
| } |
| |
| static bool irq_pool_is_sf_pool(struct mlx5_irq_pool *pool) |
| { |
| return !strncmp("mlx5_sf", pool->name, strlen("mlx5_sf")); |
| } |
| |
| static struct mlx5_irq *irq_request(struct mlx5_irq_pool *pool, int i) |
| { |
| struct mlx5_core_dev *dev = pool->dev; |
| char name[MLX5_MAX_IRQ_NAME]; |
| struct mlx5_irq *irq; |
| int err; |
| |
| irq = kzalloc(sizeof(*irq), GFP_KERNEL); |
| if (!irq) |
| return ERR_PTR(-ENOMEM); |
| irq->irqn = pci_irq_vector(dev->pdev, i); |
| if (!irq_pool_is_sf_pool(pool)) |
| irq_set_name(pool, name, i); |
| else |
| irq_sf_set_name(pool, name, i); |
| ATOMIC_INIT_NOTIFIER_HEAD(&irq->nh); |
| snprintf(irq->name, MLX5_MAX_IRQ_NAME, |
| "%s@pci:%s", name, pci_name(dev->pdev)); |
| err = request_irq(irq->irqn, irq_int_handler, 0, irq->name, |
| &irq->nh); |
| if (err) { |
| mlx5_core_err(dev, "Failed to request irq. err = %d\n", err); |
| goto err_req_irq; |
| } |
| if (!zalloc_cpumask_var(&irq->mask, GFP_KERNEL)) { |
| mlx5_core_warn(dev, "zalloc_cpumask_var failed\n"); |
| err = -ENOMEM; |
| goto err_cpumask; |
| } |
| irq->pool = pool; |
| irq->refcount = 1; |
| irq->index = i; |
| err = xa_err(xa_store(&pool->irqs, irq->index, irq, GFP_KERNEL)); |
| if (err) { |
| mlx5_core_err(dev, "Failed to alloc xa entry for irq(%u). err = %d\n", |
| irq->index, err); |
| goto err_xa; |
| } |
| return irq; |
| err_xa: |
| free_cpumask_var(irq->mask); |
| err_cpumask: |
| free_irq(irq->irqn, &irq->nh); |
| err_req_irq: |
| kfree(irq); |
| return ERR_PTR(err); |
| } |
| |
| int mlx5_irq_attach_nb(struct mlx5_irq *irq, struct notifier_block *nb) |
| { |
| int ret; |
| |
| ret = irq_get(irq); |
| if (!ret) |
| /* Something very bad happens here, we are enabling EQ |
| * on non-existing IRQ. |
| */ |
| return -ENOENT; |
| ret = atomic_notifier_chain_register(&irq->nh, nb); |
| if (ret) |
| irq_put(irq); |
| return ret; |
| } |
| |
| int mlx5_irq_detach_nb(struct mlx5_irq *irq, struct notifier_block *nb) |
| { |
| int err = 0; |
| |
| err = atomic_notifier_chain_unregister(&irq->nh, nb); |
| irq_put(irq); |
| return err; |
| } |
| |
| struct cpumask *mlx5_irq_get_affinity_mask(struct mlx5_irq *irq) |
| { |
| return irq->mask; |
| } |
| |
| int mlx5_irq_get_index(struct mlx5_irq *irq) |
| { |
| return irq->index; |
| } |
| |
| /* irq_pool API */ |
| |
| /* creating an irq from irq_pool */ |
| static struct mlx5_irq *irq_pool_create_irq(struct mlx5_irq_pool *pool, |
| struct cpumask *affinity) |
| { |
| struct mlx5_irq *irq; |
| u32 irq_index; |
| int err; |
| |
| err = xa_alloc(&pool->irqs, &irq_index, NULL, pool->xa_num_irqs, |
| GFP_KERNEL); |
| if (err) |
| return ERR_PTR(err); |
| irq = irq_request(pool, irq_index); |
| if (IS_ERR(irq)) |
| return irq; |
| cpumask_copy(irq->mask, affinity); |
| irq_set_affinity_hint(irq->irqn, irq->mask); |
| return irq; |
| } |
| |
| /* looking for the irq with the smallest refcount and the same affinity */ |
| static struct mlx5_irq *irq_pool_find_least_loaded(struct mlx5_irq_pool *pool, |
| struct cpumask *affinity) |
| { |
| int start = pool->xa_num_irqs.min; |
| int end = pool->xa_num_irqs.max; |
| struct mlx5_irq *irq = NULL; |
| struct mlx5_irq *iter; |
| unsigned long index; |
| |
| lockdep_assert_held(&pool->lock); |
| xa_for_each_range(&pool->irqs, index, iter, start, end) { |
| if (!cpumask_equal(iter->mask, affinity)) |
| continue; |
| if (iter->refcount < pool->min_threshold) |
| return iter; |
| if (!irq || iter->refcount < irq->refcount) |
| irq = iter; |
| } |
| return irq; |
| } |
| |
| /* requesting an irq from a given pool according to given affinity */ |
| static struct mlx5_irq *irq_pool_request_affinity(struct mlx5_irq_pool *pool, |
| struct cpumask *affinity) |
| { |
| struct mlx5_irq *least_loaded_irq, *new_irq; |
| |
| mutex_lock(&pool->lock); |
| least_loaded_irq = irq_pool_find_least_loaded(pool, affinity); |
| if (least_loaded_irq && |
| least_loaded_irq->refcount < pool->min_threshold) |
| goto out; |
| new_irq = irq_pool_create_irq(pool, affinity); |
| if (IS_ERR(new_irq)) { |
| if (!least_loaded_irq) { |
| mlx5_core_err(pool->dev, "Didn't find IRQ for cpu = %u\n", |
| cpumask_first(affinity)); |
| mutex_unlock(&pool->lock); |
| return new_irq; |
| } |
| /* We failed to create a new IRQ for the requested affinity, |
| * sharing existing IRQ. |
| */ |
| goto out; |
| } |
| least_loaded_irq = new_irq; |
| goto unlock; |
| out: |
| irq_get_locked(least_loaded_irq); |
| if (least_loaded_irq->refcount > pool->max_threshold) |
| mlx5_core_dbg(pool->dev, "IRQ %u overloaded, pool_name: %s, %u EQs on this irq\n", |
| least_loaded_irq->irqn, pool->name, |
| least_loaded_irq->refcount / MLX5_EQ_REFS_PER_IRQ); |
| unlock: |
| mutex_unlock(&pool->lock); |
| return least_loaded_irq; |
| } |
| |
| /* requesting an irq from a given pool according to given index */ |
| static struct mlx5_irq * |
| irq_pool_request_vector(struct mlx5_irq_pool *pool, int vecidx, |
| struct cpumask *affinity) |
| { |
| struct mlx5_irq *irq; |
| |
| mutex_lock(&pool->lock); |
| irq = xa_load(&pool->irqs, vecidx); |
| if (irq) { |
| irq_get_locked(irq); |
| goto unlock; |
| } |
| irq = irq_request(pool, vecidx); |
| if (IS_ERR(irq) || !affinity) |
| goto unlock; |
| cpumask_copy(irq->mask, affinity); |
| if (!irq_pool_is_sf_pool(pool) && !pool->xa_num_irqs.max && |
| cpumask_empty(irq->mask)) |
| cpumask_set_cpu(0, irq->mask); |
| irq_set_affinity_hint(irq->irqn, irq->mask); |
| unlock: |
| mutex_unlock(&pool->lock); |
| return irq; |
| } |
| |
| static struct mlx5_irq_pool *find_sf_irq_pool(struct mlx5_irq_table *irq_table, |
| int i, struct cpumask *affinity) |
| { |
| if (cpumask_empty(affinity) && i == MLX5_IRQ_EQ_CTRL) |
| return irq_table->sf_ctrl_pool; |
| return irq_table->sf_comp_pool; |
| } |
| |
| /** |
| * mlx5_irq_release - release an IRQ back to the system. |
| * @irq: irq to be released. |
| */ |
| void mlx5_irq_release(struct mlx5_irq *irq) |
| { |
| synchronize_irq(irq->irqn); |
| irq_put(irq); |
| } |
| |
| /** |
| * mlx5_irq_request - request an IRQ for mlx5 device. |
| * @dev: mlx5 device that requesting the IRQ. |
| * @vecidx: vector index of the IRQ. This argument is ignore if affinity is |
| * provided. |
| * @affinity: cpumask requested for this IRQ. |
| * |
| * This function returns a pointer to IRQ, or ERR_PTR in case of error. |
| */ |
| struct mlx5_irq *mlx5_irq_request(struct mlx5_core_dev *dev, u16 vecidx, |
| struct cpumask *affinity) |
| { |
| struct mlx5_irq_table *irq_table = mlx5_irq_table_get(dev); |
| struct mlx5_irq_pool *pool; |
| struct mlx5_irq *irq; |
| |
| if (mlx5_core_is_sf(dev)) { |
| pool = find_sf_irq_pool(irq_table, vecidx, affinity); |
| if (!pool) |
| /* we don't have IRQs for SFs, using the PF IRQs */ |
| goto pf_irq; |
| if (cpumask_empty(affinity) && !strcmp(pool->name, "mlx5_sf_comp")) |
| /* In case an SF user request IRQ with vecidx */ |
| irq = irq_pool_request_vector(pool, vecidx, NULL); |
| else |
| irq = irq_pool_request_affinity(pool, affinity); |
| goto out; |
| } |
| pf_irq: |
| pool = irq_table->pf_pool; |
| vecidx = (vecidx == MLX5_IRQ_EQ_CTRL) ? pool->xa_num_irqs.max : vecidx; |
| irq = irq_pool_request_vector(pool, vecidx, affinity); |
| out: |
| if (IS_ERR(irq)) |
| return irq; |
| mlx5_core_dbg(dev, "irq %u mapped to cpu %*pbl, %u EQs on this irq\n", |
| irq->irqn, cpumask_pr_args(affinity), |
| irq->refcount / MLX5_EQ_REFS_PER_IRQ); |
| return irq; |
| } |
| |
| static struct mlx5_irq_pool * |
| irq_pool_alloc(struct mlx5_core_dev *dev, int start, int size, char *name, |
| u32 min_threshold, u32 max_threshold) |
| { |
| struct mlx5_irq_pool *pool = kvzalloc(sizeof(*pool), GFP_KERNEL); |
| |
| if (!pool) |
| return ERR_PTR(-ENOMEM); |
| pool->dev = dev; |
| mutex_init(&pool->lock); |
| xa_init_flags(&pool->irqs, XA_FLAGS_ALLOC); |
| pool->xa_num_irqs.min = start; |
| pool->xa_num_irqs.max = start + size - 1; |
| if (name) |
| snprintf(pool->name, MLX5_MAX_IRQ_NAME - MLX5_MAX_IRQ_IDX_CHARS, |
| "%s", name); |
| pool->min_threshold = min_threshold * MLX5_EQ_REFS_PER_IRQ; |
| pool->max_threshold = max_threshold * MLX5_EQ_REFS_PER_IRQ; |
| mlx5_core_dbg(dev, "pool->name = %s, pool->size = %d, pool->start = %d", |
| name, size, start); |
| return pool; |
| } |
| |
| static void irq_pool_free(struct mlx5_irq_pool *pool) |
| { |
| struct mlx5_irq *irq; |
| unsigned long index; |
| |
| /* There are cases in which we are destrying the irq_table before |
| * freeing all the IRQs, fast teardown for example. Hence, free the irqs |
| * which might not have been freed. |
| */ |
| xa_for_each(&pool->irqs, index, irq) |
| irq_release(irq); |
| xa_destroy(&pool->irqs); |
| mutex_destroy(&pool->lock); |
| kvfree(pool); |
| } |
| |
| static int irq_pools_init(struct mlx5_core_dev *dev, int sf_vec, int pf_vec) |
| { |
| struct mlx5_irq_table *table = dev->priv.irq_table; |
| int num_sf_ctrl_by_msix; |
| int num_sf_ctrl_by_sfs; |
| int num_sf_ctrl; |
| int err; |
| |
| /* init pf_pool */ |
| table->pf_pool = irq_pool_alloc(dev, 0, pf_vec, NULL, |
| MLX5_EQ_SHARE_IRQ_MIN_COMP, |
| MLX5_EQ_SHARE_IRQ_MAX_COMP); |
| if (IS_ERR(table->pf_pool)) |
| return PTR_ERR(table->pf_pool); |
| if (!mlx5_sf_max_functions(dev)) |
| return 0; |
| if (sf_vec < MLX5_IRQ_VEC_COMP_BASE_SF) { |
| mlx5_core_dbg(dev, "Not enught IRQs for SFs. SF may run at lower performance\n"); |
| return 0; |
| } |
| |
| /* init sf_ctrl_pool */ |
| num_sf_ctrl_by_msix = DIV_ROUND_UP(sf_vec, MLX5_COMP_EQS_PER_SF); |
| num_sf_ctrl_by_sfs = DIV_ROUND_UP(mlx5_sf_max_functions(dev), |
| MLX5_SFS_PER_CTRL_IRQ); |
| num_sf_ctrl = min_t(int, num_sf_ctrl_by_msix, num_sf_ctrl_by_sfs); |
| num_sf_ctrl = min_t(int, MLX5_IRQ_CTRL_SF_MAX, num_sf_ctrl); |
| table->sf_ctrl_pool = irq_pool_alloc(dev, pf_vec, num_sf_ctrl, |
| "mlx5_sf_ctrl", |
| MLX5_EQ_SHARE_IRQ_MIN_CTRL, |
| MLX5_EQ_SHARE_IRQ_MAX_CTRL); |
| if (IS_ERR(table->sf_ctrl_pool)) { |
| err = PTR_ERR(table->sf_ctrl_pool); |
| goto err_pf; |
| } |
| /* init sf_comp_pool */ |
| table->sf_comp_pool = irq_pool_alloc(dev, pf_vec + num_sf_ctrl, |
| sf_vec - num_sf_ctrl, "mlx5_sf_comp", |
| MLX5_EQ_SHARE_IRQ_MIN_COMP, |
| MLX5_EQ_SHARE_IRQ_MAX_COMP); |
| if (IS_ERR(table->sf_comp_pool)) { |
| err = PTR_ERR(table->sf_comp_pool); |
| goto err_sf_ctrl; |
| } |
| return 0; |
| err_sf_ctrl: |
| irq_pool_free(table->sf_ctrl_pool); |
| err_pf: |
| irq_pool_free(table->pf_pool); |
| return err; |
| } |
| |
| static void irq_pools_destroy(struct mlx5_irq_table *table) |
| { |
| if (table->sf_ctrl_pool) { |
| irq_pool_free(table->sf_comp_pool); |
| irq_pool_free(table->sf_ctrl_pool); |
| } |
| irq_pool_free(table->pf_pool); |
| } |
| |
| /* irq_table API */ |
| |
| int mlx5_irq_table_init(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_irq_table *irq_table; |
| |
| if (mlx5_core_is_sf(dev)) |
| return 0; |
| |
| irq_table = kvzalloc(sizeof(*irq_table), GFP_KERNEL); |
| if (!irq_table) |
| return -ENOMEM; |
| |
| dev->priv.irq_table = irq_table; |
| return 0; |
| } |
| |
| void mlx5_irq_table_cleanup(struct mlx5_core_dev *dev) |
| { |
| if (mlx5_core_is_sf(dev)) |
| return; |
| |
| kvfree(dev->priv.irq_table); |
| } |
| |
| int mlx5_irq_table_get_num_comp(struct mlx5_irq_table *table) |
| { |
| if (!table->pf_pool->xa_num_irqs.max) |
| return 1; |
| return table->pf_pool->xa_num_irqs.max - table->pf_pool->xa_num_irqs.min; |
| } |
| |
| int mlx5_irq_table_create(struct mlx5_core_dev *dev) |
| { |
| int num_eqs = MLX5_CAP_GEN(dev, max_num_eqs) ? |
| MLX5_CAP_GEN(dev, max_num_eqs) : |
| 1 << MLX5_CAP_GEN(dev, log_max_eq); |
| int total_vec; |
| int pf_vec; |
| int err; |
| |
| if (mlx5_core_is_sf(dev)) |
| return 0; |
| |
| pf_vec = MLX5_CAP_GEN(dev, num_ports) * num_online_cpus() + 1; |
| pf_vec = min_t(int, pf_vec, num_eqs); |
| |
| total_vec = pf_vec; |
| if (mlx5_sf_max_functions(dev)) |
| total_vec += MLX5_IRQ_CTRL_SF_MAX + |
| MLX5_COMP_EQS_PER_SF * mlx5_sf_max_functions(dev); |
| |
| total_vec = pci_alloc_irq_vectors(dev->pdev, 1, total_vec, PCI_IRQ_MSIX); |
| if (total_vec < 0) |
| return total_vec; |
| pf_vec = min(pf_vec, total_vec); |
| |
| err = irq_pools_init(dev, total_vec - pf_vec, pf_vec); |
| if (err) |
| pci_free_irq_vectors(dev->pdev); |
| |
| return err; |
| } |
| |
| void mlx5_irq_table_destroy(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_irq_table *table = dev->priv.irq_table; |
| |
| if (mlx5_core_is_sf(dev)) |
| return; |
| |
| /* There are cases where IRQs still will be in used when we reaching |
| * to here. Hence, making sure all the irqs are released. |
| */ |
| irq_pools_destroy(table); |
| pci_free_irq_vectors(dev->pdev); |
| } |
| |
| int mlx5_irq_table_get_sfs_vec(struct mlx5_irq_table *table) |
| { |
| if (table->sf_comp_pool) |
| return min_t(int, num_online_cpus(), |
| table->sf_comp_pool->xa_num_irqs.max - |
| table->sf_comp_pool->xa_num_irqs.min + 1); |
| else |
| return mlx5_irq_table_get_num_comp(table); |
| } |
| |
| struct mlx5_irq_table *mlx5_irq_table_get(struct mlx5_core_dev *dev) |
| { |
| #ifdef CONFIG_MLX5_SF |
| if (mlx5_core_is_sf(dev)) |
| return dev->priv.parent_mdev->priv.irq_table; |
| #endif |
| return dev->priv.irq_table; |
| } |