@@ -483,6 +483,58 @@ struct mlx5_irq *mlx5_irq_request(struct mlx5_core_dev *dev, u16 vecidx,
return irq;
}
+/**
+ * mlx5_msix_alloc - allocate msix interrupt
+ * @dev: mlx5 device from which to request
+ * @handler: interrupt handler
+ * @affdesc: affinity descriptor
+ * @name: interrupt name
+ *
+ * Returns: struct msi_map with result encoded.
+ * Note: the caller must make sure to release the irq by calling
+ * mlx5_msix_free() if shutdown was initiated.
+ */
+struct msi_map mlx5_msix_alloc(struct mlx5_core_dev *dev,
+ irqreturn_t (*handler)(int, void *),
+ const struct irq_affinity_desc *affdesc,
+ const char *name)
+{
+ struct msi_map map;
+ int err;
+
+ if (!dev->pdev) {
+ map.virq = 0;
+ map.index = -EINVAL;
+ return map;
+ }
+
+ map = pci_msix_alloc_irq_at(dev->pdev, MSI_ANY_INDEX, affdesc);
+ if (!map.virq)
+ return map;
+
+ err = request_irq(map.virq, handler, 0, name, NULL);
+ if (err) {
+ mlx5_core_warn(dev, "err %d\n", err);
+ pci_msix_free_irq(dev->pdev, map);
+ map.virq = 0;
+ map.index = -ENOMEM;
+ }
+ return map;
+}
+EXPORT_SYMBOL(mlx5_msix_alloc);
+
+/**
+ * mlx5_msix_free - free a previously allocated msix interrupt
+ * @dev: mlx5 device associated with interrupt
+ * @map: map previously returned by mlx5_msix_alloc()
+ */
+void mlx5_msix_free(struct mlx5_core_dev *dev, struct msi_map map)
+{
+ free_irq(map.virq, NULL);
+ pci_msix_free_irq(dev->pdev, map);
+}
+EXPORT_SYMBOL(mlx5_msix_free);
+
/**
* mlx5_irqs_release_vectors - release one or more IRQs back to the system.
* @irqs: IRQs to be released.
@@ -1308,4 +1308,10 @@ enum {
MLX5_OCTWORD = 16,
};
+struct msi_map mlx5_msix_alloc(struct mlx5_core_dev *dev,
+ irqreturn_t (*handler)(int, void *),
+ const struct irq_affinity_desc *affdesc,
+ const char *name);
+void mlx5_msix_free(struct mlx5_core_dev *dev, struct msi_map map);
+
#endif /* MLX5_DRIVER_H */